Publication Conference Papers (refereed)

Conference Papers (refereed)

  1. Fitzsimons, P.M., Prasad, J.V.R., Tongue, B.H., and Schrage, D.P., “Non-Iterative Parameter Identification Techniques,” Proceedings of the Annual Forum of the American Helicopter Society, Washington, DC, May 1986.
  2. Siciliano, B., Calise, A.J., and Prasad, J.V.R., “Optimal Output Fast  Feedback in Two-Time Scale Control of a Flexible Arm,” Proceedings of the 25th IEEE Conference on Decision and Control, Athens, Greece, December 10-12, 1986.
  3. Calise, A.J. and Prasad, J.V.R., “Fixed Order Compensator Design Based on Frequency Shaped Cost Functionals,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Monterey, CA, August 17-19, 1987.
  4. Calise, A.J. and Prasad, J.V.R., “Pulse Motor Control for Maximizing Average Velocity,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Monterey, CA, August 17-19, 1987.
  5. Calise, A.J., Prasad, J.V.R., and Siciliano, B., “Output Feedback in Multi-Time Scale Control of Flexible Arms,” Proceedings of the 26th IEEE Conference on Decision and Control, Los Angeles, CA, December 1987.
  6.      Calise, A.J. and Prasad, J.V.R., “An Approximate Loop Transfer Recovery  Method for Designing Fixed-Order Compensators,” Proceedings of the AIAA Guidance, Navigation, and Control Conference, Minneapolis, MN, August 15-17, 1988, AIAA-1988-4078.
  7. Menon, P.K.A., Schrage, D.P., and Prasad, J.V.R., “Nonlinear Control of a  Twin-Lift Helicopter System,” Proceedings of the AIAA Guidance, Navigation  and Control Conference, Minneapolis, MN, August 15-17, 1988.
  8. Schrage, D.P., Peters, D.A., Prasad, J.V.R., Stumpf, W.F., and He, C., “Helicopter Stability and Control Modeling Improvements and Verification on Two Helicopters,” Proceedings of the Fourteenth European Rotorcraft Forum, Paper  No. 77, Milano, Italy, September 20-23, 1988.
  9. Prasad, J.V.R., Schrage, D.P., and Calise, A.J., “Comparison of Helicopter Flight Control System Design Techniques,” Proceedings of the International Conference on Helicopter Handling Qualities and Control, London, November 15- 17, 1988 (PRO-RAeS-88).
  10. Siciliano, B., Calise, A.J., and Prasad, J.V.R., “Two-Time Scale Stabilization of a Flexible Arm with Output Feedback,” Proceedings of the American Control Conference, Pittsburgh, June 21-23, 1989.
  11. Prasad, J.V.R., Schrage, D.P., and Mittal, M., “Comparison of Nonlinear Controllers for Twin-Lift Configurations,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Boston, MA, August 14-16, 1989, AIAA-1989-3591.
  12. Mittal, M., Prasad, J.V.R., and Schrage, D.P., “Nonlinear Adaptive Control of a Twin Lift Helicopter System,” Proceedings of the American Control Conference, San Diego, CA, May 1990.
  13. Prasad, J.V.R., Mittal, M. and Schrage, D.P., “Control of a Twin Lift Helicopter System using Nonlinear State Feedback,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Portland, Oregon, August, 1990.
  14. Siciliano, B., Prasad, J.V.R. and Calise, A.J., “Design of a Composite Controller for a Two-link Flexible Manipulator,” Proceedings of the International Symposium on Intelligent Robotics, Bangalore, India, January 1991.
  15. Prasad, J.V.R. and Hanagud, S.V., “Active Control of an Intelligent Structure using Fixed Order Dynamic Compensation,” Proceedings of the International Symposium on Intelligent Robotics, Bangalore, India, January 1991.
  16. Prasad, J.V.R., Schrage, D.P., Lewis, W. and Wolfe, D., “Performance and Handling Qualities Criteria for Low Cost Real Time Rotorcraft Simulators – A Methodology Development,” Proceedings of the Annual Forum of the American Helicopter Society, Phoenix, AZ, May 1991.
  17. Prasad, J.V.R. and Hanagud, S.V., “Vibration Control of a Smart Structure using Fixed Order Dynamic Compensation,” Proceedings of the Eighth VPI&SU symposium on dynamics and control of large structures, Blacksburg, VA, May 1991.
  18. Riaz, J., Prasad, J.V.R., Schrage, D.P. and Gaonkar, G.H., “New Method for Simulating Atmospheric Turbulence for Rotorcraft Applications,” Proceedings of the Annual Forum of the American Helicopter Society, Phoenix, AZ, May 1991, also presented at the AGARD symposium on aircraft ship operations, Seville, Spain, May 1991. (AGARD-CP-509, November 1991)
  19. Prasad, J.V.R., Calise, A.J. and Byrns, E., Jr., “Active Vibration Control Using Fixed Order Dynamic Compensation with Frequency Shaped Cost Functionals,” Proceedings of the American Control Conference, Boston, June 1991.
  20. Mittal, M. and Prasad, J.V.R., “Input-Output Linearization of Twin Lift Helicopter System,” Proceedings of the AIAA Guidance, Navigation and Control Conference, August 1991.
  21. Hanagud, S., Prasad, J.V.R., Bowles, T. and Gummadi, N., “Smart Structures in the Active Control of Blade-Vortex Interaction Effects,” Proceedings of the European Rotorcraft Forum, September 1991.
  22. Prasad, J.V.R. and Schrage, D.P., “Helicopter Nonlinear Flight Control System Development,” Proceedings of the European Rotorcraft Forum, September 1991.
  23. Riaz, J., Prasad, J.V.R., Schrage, D.P. and Gaonkar, G.H., “Helicopter Response to Atmospheric Turbulence,” Proceedings of the Annual Forum of the American Helicopter Society, Washington, D.C., June 1992.
  24. Sturisky, S.H., Lewis, W.D., Schrage, D.P. and Prasad, J.V.R., “Development and Validation of a Comprehensive Real Time AH-64 Apache Simulation Model,” Proceedings of the Annual Forum of the American Helicopter Society, Washington, D.C., June 1992.
  25. Prasad, J.V.R. and Lipp, A., “Synthesis of a Helicopter Nonlinear Flight Controller using Approximate Model Inversion,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Hilton Head, SC, August 1992.
  26. Kisli, E., Prasad, J.V.R. and Yillikci, Y.K., Conceptual Design of a Stopped Rotor with Flap Controls,” Proceedings of the 18th European Rotorcraft Forum, Avignon, France, September 15-18, 1992.
  27. Leitner, J. and Prasad, J.V.R., “Helicopter Robust Nonlinear Controller Synthesis using Approximate Linearization,” Proceedings of the 1993 Annual Forum of the American Helicopter Society, May 1993.
  28. Prasad, J.V.R., Riaz, J., Gaonkar, G.H. and Yi, D., “Real Time Implementation Aspects of a Turbulence Simulation Method,” Proceedings of the 1993 Annual Forum of the American Helicopter Society, May 1993.
  29. Mavris, D.N., Prasad, J.V.R. and Schrage, D.P., “Development of a Stochastic Model for the Simulation of Ship Airwake-Rotorcraft Interactions,” Proceedings of the AHS Specialists Meeting on Flight Simulation, Fairfield County, Connecticut, October 1993.
  30. Yillikci, Y.K., Prasad, J.V.R. and Schrage, D.P., “Blade Response Simulation of Flap Controller Stopped Rotors,” Proceedings of the AIAA International Powered Lift Conference, Santa Clara, CA, December 1-3, 1993, AIAA-1993-4847.
  31. Mello, M., Prasad, J.V.R., Sankar, L.N., and Tseng, W., “Analysis of Helicopter/Ship Aerodynamic Interactions,” Proceedings of the American Helicopter Society Aeromechanics Specialists Conference, San Francisco, CA, January 1994.
  32. Ying, Y. Dang, Gaonkar, G.H., Prasad, J.V.R. and Zhong, H., “Parallel Computers for Real Time Simulation of Atmospheric Turbulence,” Proceedings of the AHS Forum 1994
  33. Scholz, C. and Prasad, J.V.R., “Propulsion System Modeling for Integrated Flight Propulsion Control Study” Proceedings of the AHS Forum 1994.
  34. Zhang, H., Prasad, J.V.R. and Mavris, D., “Ship Airwake Effects on Helicopter Rotor Aerodynamic Loads,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Scottsdale, AZ, August 1-3, 1994, AIAA-1994-3509.
  35. Leitner, J., Prasad, J.V.R., Calise, A.J., “Helicopter Robust Flight Control System Development using Neural Networks,” Proceedings of the AIAA GNC Conference, August 1994.
  36. Yillikci, Y.K., Prasad, J.V.R. and Schrage, D.P., “Transient Response of a Flap Controller Stopped Rotor,” Proceedings of the 19th ICAS/AIAA Conference, Anaheim, CA, September 18-23, 1994.
  37. Calise, A.J., Leitner, J. and Prasad, J.V.R., “Helicopter Adaptive Flight Control using Neural Networks,” Proceedings of the 33rd IEEE Conference on Decision and Control, December 1994.
  38. Jiang, T.Y., Prasad, J.V.R. and Swaminathan, R., “Synthesis of an Integrated Fuzzy/Nonlinear Controller for Rotorcraft,” Proceedings of the AHS Forum, May 1995.
  39. Liu, K., Mittal, M., Prasad, J.V.R. and Scholz, C.J., “A Study of Coupled Engine/Rotor Dynamic Behavior,” Proceedings of the AHS Forum, May 1995, pp. 1335-1346.
  40. Zhang, H., Mello, O.A.F., Prasad, J.V.R., Sankar, L.N. and Funk, J.D., “A Simulation Model of Ship Ground Effect for Rotorcraft/Ship Interaction Study,” Proceedings of the AHS Forum, May 1995, pp. 1094-1100.
  41. Prasad, J.V.R., Mittal, M., Mavris, D. and Zhang, H., “A Simulation Model of Ship Airwake for Rotorcraft/Ship Interaction Study,” Proceedings of the Annual Forum of the American Helicopter Society, May 1995.
  42. Leitner, J., Calise, A.J. and Prasad, J.V.R., “Analysis of Adaptive Neural Networks for Helicopter Flight Controls,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Baltimore, MD, August 7-10, 1995, pp. 871-879.
  43. Prasad, J.V.R., Jiang, T. and Swaminathan, R., “Integrated Fuzzy/Nonlinear Controller Synthesis for Rotorcraft,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Baltimore, MD, August 7-10, 1995, AIAA-1995-3229.
  44. Zhang, H., Prasad. J.V.R., Sankar, L.N., Mello, O.A.F. and Funk, J.D., “Ground Effect Simulation Model for Rotorcraft/Ship Interaction Study,” Proceedings of the AIAA Flight Simulation Conference, Baltimore, MD, August 1995.
  45. Perhinschi, M. and Prasad, J.V.R., “Analytical Investigation of Helicopter Handling Qualities Criterion using a Structural Pilot Model,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Baltimore, MD, August 1995.
  46. Liu, K., Prasad, J.V.R. and Mittal, M., “Coupling Engine/Rotor Dynamic Behavior for Integrated Flight/Propulsion Study,” Proceedings of the AIAA Flight Simulation Conference, Baltimore, MD, August 7-10, 1995, AIAA-1995-3401.
  47. Swaminathan, R., Prasad, J.V.R. and Sankar, L.N., “Active Control of Blade-Vortex Interaction using a Neuro-Fuzzy Controller,” Proceedings of the 3rd International Conference on Intelligent Materials, Lyon, France, June 1996.
  48. Zhang, H., Prasad, J.V.R. and Peters, D.A., “Finite State Inflow Models for Lifting Rotors in Ground Effect,” Proceedings of the 52nd Annual Forum of the American Helicopter Society, Washington, D.C., June 1996.
  49. Liu, K. and Prasad, J.V.R., “Helicopter Rotor/Propulsion Dynamic Coupling Analysis,” Proceedings of the AIAA Flight Mechanics Conference, Xian, China, June 1996.
  50. Jiang, T.Y., Prasad, J.V.R. and Calise, A.J., “Adaptive Fuzzy Logic Flight Controller for Rotorcraft,” Proceedings of the AIAA Guidance, Navigation and Control Conference, San Diego, CA, July 29-31, 1996, AIAA-1996-3850.
  51. Prasad, J.V.R. and Liu, K., “A Detailed Analysis of Dynamic Coupling between Helicopter Rotor and Propulsion System,” Proceedings of the AIAA Flight Simulation Technologies Conference, San Diego, July 1996.
  52. Krothapalli, K., Prasad, J.V.R. and Peters, D.A., “Development of a Comprehensive Wake Theory for Lifting Rotors,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, San Diego, CA, July 29-31, 1996, AIAA-1996-3390.
  53. Vachtsevanos, G., Kim, W., Al-Hassan, S., Rufus, F., Simon, M., Schrage, D. and Prasad, J.V.R., “Autonomous Vehicles: From Flight Control to Mission Planning using Fuzzy Logic Techniques,” Proceedings of the Symposium on Breakthrough Opportunities in Fuzzy Logic, Tokyo, Japan, December 16-18, 1996.
  54. Rivera, C. and Prasad, J.V.R., “Identification of a Nonlinear Compressor Model,” Proceedings of the 2nd International Conference on Mathematical Modeling, Vienna, Austria, February 5-7, 1997.
  55. Prasad, J.V.R., Zhang, H. and Peters, D.A., “In-Ground Effect Inflow Models for Lifting Rotors Using a Finite State Modeling Approach,” Proceedings of the 2nd International Conference on Mathematical Modeling, Vienna, Austria, February 5-7, 1997.
  56. Prasad, J.V.R., Zhang, H. and Peters, D.A., “Finite State In-Ground Effect Inflow Models for Lifting Rotors,” Proceedings of the American Helicopter Society Annual Forum, April 1997.
  57. Schrage, D.P., Prasad, J.V.R., Gordan, M.A., Vachtsevanos, G., Arkin, R.C., Collins, T.R., Michelson, R., Corban, E. and Kuck, K., “The Autonomous Scout Rotorcraft Testbed(ASRT) as an Integrated System,” Proceedings of the 53rd American Helicopter Society Forum, Virgiania Beach, VA, May 1997.
  58. Barocela, E., Peters, D., Krothapalli, K. and Prasad, J.V.R., “The Effect of Wake Distortion on Rotor Inflow Gradients and Off-Axis Coupling,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, New Orleans, LA, August 11-13, 1997, AIAA-1997-3579.
  59. Swaminathan, R., Prasad, J.V.R., Neumeier, Y. and Lal, M., “Combined Model and Rule Based Control of Compression System Rotating Stall,” Proceedings of the 33rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Seattle, WA, July 1997.
  60. Rivera, C.J., Sankar, L.N. and Prasad, J.V.R., “Numerical Simulation of Dynamic Stall Phenomena in Axial Flow Compressor Blade Rows,” Proceedings of the 33rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Seattle, WA, July 1997.
  61. Neumeier, Y., Markopoulos, N., Prasad, J.V.R. and Zinn, B., “Control of Compressor Instabilities using Global Throttling and Linear Rotating Stall Amplitude Feedback,” Proceedings of the AIAA Aerospace Sciences Meeting, Reno, NV, 1997.
  62. Prasad, J.V.R., Xin, H., Peters, D., Nagashima, T. and Iboshi, N., “Development and Validation of a Finite State In-Ground Effect Inflow Model for Lifting Rotors,” Proceedings of the AHS Technical Specialists Meeting for Rotorcraft Acoustics and Aerodynamics, Williamsburg, VA, October 1997.
  63. Yi, Y. and Prasad, J.V.R., “Optimal Control of Blade Vortex Interactions,” Proceedings of the AHS Technical Specialists Meeting for Rotorcraft Acoustics and Aerodynamics, Williamsburg, VA, October 1997.
  64. Krothapalli, K., Prasad, J.V.R., Peters, D., “Krothapalli, Prasad, Peters, “Improved Wake Geometry Model for a Maneuvering Rotor,” Proceedings of the AHS Technical Specialists Meeting for Rotorcraft Acoustics and Aerodynamics, Williamsburg, VA, October 1997.
  65. Perhinschi, M. and Prasad, J.V.R., “A Simulation Model of an Autonomous Helicopter,” Proceedings of the RPV/UAV Systems 13th Bristol International Conference, April 1998.
  66. Itoga, N., Nagashima, T., Iboshi, N., Kawakami, S.,  Prasad, J.V.R. and Peters, D.A., “Numerical Analysis of Ground Effect for a Lifting Rotor Hovering above Closed Proximity to Inclined Flat Surface,” Proceedings of the International Specialists’ Meeting on Helicopter Advanced Technology and Disaster Relief, Gify City, Japan, April 1998.
  67. Prasad, J.V.R. and Jiang, T.Y., “Adaptive Fuzzy Logic Flight Controller for a Helicopter,” International Specialists’ Proceedings of the International Specialists’ Meeting on Helicopter Advanced Technology and Disaster Relief, Gifu City, Japan, April 1998.
  68. Horn, J., Calise, A.J. and Prasad, J.V.R., “Flight Envelope Cueing on a Tilt-Rotor Aircraft Using Neural Network Limit prediction,” Proceedings of the 54th American Helicopter Society Forum, Washington, DC, May 1998.
  69. Xin, H., Prasad, J.V.R., Peters, D., Nagashima, T. and Iboshi, N., “A Finite State Inflow Models for Simulation of Helicopter Hovering in Ground Effect,” Proceedings of the 54th American Helicopter Society Forum, Washington, DC, May 1998.
  70. Krothapalli, K., Prasad, J.V.R., Peters, D., “Krothapalli, Prasad, Peters, “A Generalized Dynamic Wake Model with Wake Distortion Effects,” Proceedings of the 54th American Helicopter Society Forum, Washington, DC, May 1998.
  71. Krothapalli, K., Prasad, J.V.R. and Peters, D.A., “Study of a Rotor Flap-Inflow Model Including Wake Distortion Terms,” AGARD RTO-MP-11, May 1998.
  72. Prasad, J.V.R. and Jiang, T.Y., “Synthesis of Adaptive Fuzzy Logic Controllers with Control Rate and Amplitude Limits,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Boston, MA, August 10-12, 1998, AIAA-1998-4200.
  73. Xin, H., Prasad, J.V.R. and Peters, D.A., “Unsteady Aerodynamics of Helicopter Rotor Hovering in Dynamic Ground Effect,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Boston, MA, August 10-12, 1998, AIAA-1998-4456.
  74. Horn, J., Calise, A.J. and Prasad, J.V.R., “Flight Envelope Limiting Systems using Neural Networks,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Boston, MA, August 10-12, 1998, AIAA-1998-4459.
  75. Nagashima, T., Iboshi, N., Schrage, D. P., Prasad, J. V. R., Sugimoto, M. and Suzuki, H., “Experimental Study on Ground Effect of a Lifting Rotor Hovering at Close Proximity to Finite Inclined Flat Surface (Part 1),” Proceedings of The 36th Aircraft Symposium, Yokosuka, Japan, October 1998.
  76. Xin, H., Prasad, J.V.R., Itoga, N., Iboshi, N. and Nagashima, T., “Analysis of Ground Effect on a Hovering Rotor,” Proceedings of The 36th Aircraft Symposium, Yokosuka, Japan, October 1998.
  77. Corban, J.E., Calise, A.J. and Prasad, J.V.R., “Implementation of Adaptive Nonlinear Control for Flight Test on an Unmanned Helicopter,” Proceedings of the IEEE CDC, December 1998.
  78. Krothapalli, K.R., Prasad, J.V.R., Peters, D.A., “Helicopter Rotor Dynamic Inflow Modeling for Maneuvering Flight,” Proceedings of the 55th Annual Forum of the AHS, Montreal, May 14-17, 1999, pp. 498-510.
  79. Itoga, N., Nagashima, T., Iboshi, N., Yoshizawa, Y., Prasad, J.V.R., Xin, H., and Peters, D.A., “A New Numerical Method for Predicting Aeromechanical Behaviors of a Rotor Hovering at Close proximity to Inclined Flat Surface,” Proceedings of the 55th Annual Forum of the AHS, Montreal, May 14-17, 1999, pp. 511-520.
  80. Horn, J., Calise, A.J., and Prasad, J.V.R., “Development of Envelope Protection Systems for Rotorcraft,” Proceedings of the 55th Annual Forum of the AHS, Montreal, May 14-17, 1999.
  81. Sankar, L.N., Prasad, J.V.R., Neumeier, Y., Haddad, W.H., Markopoulos, N., Stein, A., Niazi, S., and Leonessa, A., “Recent Progress in Stall and Surge Control,” Proceedings of the AIAA 99-0324, 17th Applied Aerodynamics Conference, Norfolk, VA, June 1999.
  82. Xin, H., Prasad, J.V.R., Peters, D.A., Itoga, N., Iboshi, N., and Nagashima, T., “Ground Effect Aerodynamics of Lifting Rotors Hovering above Inclined Ground plane,” Proceedings of the 17th AIAA Applied Aerodynamics Conference, Norfolk, VA, June 1999, AIAA-99-3223.
  83. Markopoulos, N, Neumeier, Y., Prasad, J.V.R., and Zinn, B.T. “An Extended Analytical Model for Compressor Rotating Stall and Surge,” Proceedings of the 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Los Angeles, CA, June 20-24, 1999.
  84. Krichene, A. and Prasad, J.V.R., “Synthesis of Adaptive Neural Networks/Fuzzy Logic Based Rotating Stall Controllers for Axial Compressors,” Proceedings of the 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Los Angeles, CA, June 20-24, 1999, AIAA-1999-2126.
  85. Prasad, J.V.R., Neumeier, Y., Krahl, B. and Markopoulos, N., “A Computational Study of Active Control of Compressor Flow Instabilities in Turbine Engines using Fuel Flow Control,” Proceedings of the 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Los Angeles, CA,  June 20-24, 1999, AIAA-1999-2127.
  86. Krichene, A. and Prasad, J.V.R., “Synthesis of Adaptive Neural Networks Based Rotating Stall Controllers for Axial Compressors,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Portland, August 9-11, 1999, AIAA-99-3995.
  87. Xin, H., Prasad, J.V.R., and Peters, D.A., “Dynamic Inflow Modeling for Simulation of a Helicopter Operating in Ground Effect,” Proceedings of the 1999 AIAA Modeling and Simulation Technologies Conference, Portland, OR, August 9-11, 1999, AIAA-99-4114.
  88. Yavrucuk, I. and Prasad, J.V.R., “Simulation of Reconfigurable Heli-UAVs using Main Rotor RPM Control in Failure Modes,” Proceedings of the AIAA Modeling and Simulation Technologies Conference, Portland, OR, August 1999, AIAA-99-4115.
  89. Prasad, J.V.R., Neumeier, Y., Lal, M., Bae, S. and Meehan, A., “An Experimental Investigation of Active and Passive Control of Rotating Stall and Surge in Axial Compressors,” Proceedings of the IEEE International Conference on Control Applications, Hawaii, August 22-26, 1999.
  90. Prasad, J.V.R., Calise, A.J., Pei, Y. and Corban, J.E., “Adaptive Nonlinear Controller Synthesis and Flight Test Evaluation on an Unmanned Helicopter,” Proceedings of the IEEE Conference on Control Applications, Hawaii, August 1999.
  91. Horn, J., Calise, A.J., and Prasad, J.V.R., “Flight Envelope Detection and Avoidance,’ Proceedings of the 25th European Rotorcraft Forum, Rome, Italy, September 14-16, 1999, paper No. H3.
  92. Xin, H., Prasad, J.V.R., and Peters, D.A., “Inflow Model for Simulation of Helicopter Flight in Dynamic Ground Effect,” Proceedings of the 25th European Rotorcraft Forum, Rome, Italy, September 14-16, 1999, paper No. H5.
  93. Prasad, J.V.R. and Yavrucuk, I., “Reconfigurable Flight Control using RPM Control for Heli-UAVs,” Proceedings of the 25th European Rotorcraft Forum, Rome, Italy, September 14-16, 1999, paper No. H6.
  94. Schrage, D.P., Shonshen, L., Prasad, J.V.R., Hanagud, S.V. and Yillikci, Y.K., “Instrumentation of the Yamaha R-50/Rmax Helicopter Testbed for Airloads Identification and Follow-on Research,” Proceedings of the 25th European Rotorcraft Forum, Rome, Italy, September 14-16, 1999, paper No. P4.
  95. Calise, A.J., Prasad, J.V.R., and Corban, J.E., “Flight Evaluation of an Adaptive Neural Network Flight Controller of an Uninhabited Helicopter,” Proceedings of the 25th European Rotorcraft Forum, Rome, Italy, September 14-16, 1999, paper No. P6.
  96. Xin, H., Prasad, J.V.R. and Peters, D.A., “An Analysis of Partial Ground Effect on the Aerodynamics of a Helicopter,” Proceedings of the AIAA 38th Aerospace Sciences Meeting & Exhibit, Reno, NV, January 10-13, 2000, AIAA-2000-262.
  97. Markopoulos, N., Neumeier, Y., Prasad, J.V.R. and Zinn, B.T., “Compressible Adiabatic Unsteady Disturbance Model for Axial Compressors,” Proceedings of the AIAA 38th Aerospace Sciences Meeting & Exhibit, January 2000.
  98. Wills, L., Kannan, S., Heck, B., Vachtsevanos, G., Restrepo, C., Sander, S., Schrage, D.P. and Prasad, J.V.R., “An Open Software Infrastructure for Reconfigurable Control Systems,” Proceedings of the American Control Conference, May 2000.
  99. Xin, H., Prasad, J.V.R., Peters, D.A., Iboshi, N. and Nagashima, T., “Correlation of Experimental Measurements with a Finite-State Ground Effect Model,” Proceedings of the 56th AHS Forum, Virginia Beach, May 2-4, 2000.
  100. Prasad, J.V.R., Neumeier, Y. and Krichene, A., “Active Control of Compressor Surge using a Real Time Observer,” Proceedings of the NATO Symposium on Active Control Technology for Enhanced Performance Operational Capabilities of Military Aircraft, Land Vehicles and Sea Vehicles, Braunschweig, Germany, May 8-11, 2000.
  101. Markopoulos, N., Neumeier, Y., Prasad, J.V.R., and Zinn, B.T., “Unsteady Disturbance Theory and Modeling for Centrifugal Compressors,” Proceedings of the AIAA Joint Propulsion Conference and Exhibit, Huntsville, AL, July 16-19, 2000, AIAA Paper No. 2000-3208.
  102. Krichene, A., Prasad, J.V.R. and Neumeier, Y., “Stall and Surge Control of Centrifugal Compressors using Real-Time Precursor Identification,” Proceedings of the AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Huntsville, AL, July 16-19, 2000, AIAA Paper No. 2000-3506.
  103. Yavrucuk, I., Kannan, S., Prasad, J.V.R. and Schrage, D.P., “Simulation Evaluation of a Reconfigurable Flight Controller of a Heli-UAV for Extreme Maneuvers,” Proceedings of the AIAA Modeling and Simulation Technology Conference, Denver, CO, August 2000, AIAA Paper No. 2000-4189.
  104. Corban, J.E., Calise, A.J. and Prasad, J.V.R., “Flight Test of an Adaptive Control System for Unmanned Helicopter Trajectory Following,” Proceedings of the AIAA GNC Conference, Denver, CO, August 14-17, 2000, AIAA Paper 2000-4058.
  105. Stein, A. Niazi, S., Prasad, J.V.R. and Sankar, L.N., “Numerical Simulations of Compressor Flow Control,” Proceedings of the AIAA Applied Aerodynamics Conference and Exhibit, Denver, CO, August 14-17, 2000, AIAA-2000-4332.
  106. Fanciullo, T., Zhao, J., Prasad, J.V.R. and Iboshi, N., ”Simulation of Finite-State Dynamic Inflow Models for In-Ground Effect and maneuvering Flight Conditions,” Proceedings of the AHS Aeromechanics Specialists’ Meeting, Atlanta, GA, November 11-14, 2000.
  107. Yavrucuk, I. And Prasad, J.V.R., “Automatic Limit Detection and Avoidance,” Proceedings of the AHS Aeromechanics Specialists’ Meeting, Atlanta, GA, November 11-14, 2000.
  108. Basset, P-M., Heuze, O., Prasad, J.V.R. and Hamers, M., “Finite State Rotor Induced Flow Model for Interferences and Ground Effect,” Proceedings of the 57th AHS Forum, Washington, DC, May 9-11, 2001.
  109. Prasad, J.V.R., Calise, A.J., Hajra, S. and Shanthakumaran, P., “Neural Net Based Adaptive Nonlinear Control of a Turboshaft Engine,” Proceedings of the 57th AHS Forum, Washington, DC, May 9-11, 2001.
  110. Prasad, J.V.R., Fanciullo, T., Zhao, J. and Peters, D.A., “Towards a High Fidelity Rotor Inflow Model for Maneuvering and In-Ground Effect Flight Simulation,” Proceedings of the 57th AHS Forum, Washington, DC, May 9-11, 2001.
  111. Yavrucuk, I. And Prasad, J.V.R., “Automatic Limit Detection and Avoidance for Unmanned Helicopters,” Proceedings of the 57th AHS Forum, Washington, DC, May 9-11, 2001.
  112. Iboshi, N., Nagashima, T. and Prasad, J.V.R., “Experimental Validation of an Inclined Ground Effect Model,” Proceedings of the 57th AHS Forum, Washington, DC, May 9-11, 2001.
  113. Hovakimyan, N., Kim, N., Calise, A.J., Prasad, J.V.R. and Corban E., “Adaptive Output Feedback for High-Bandwidth Control of an Unmanned Helicopter,” Proceedings of the AIAA Guidance, Navigation, and Control Conference, Montreal, Canada, August 6-9, 2001, AIAA-2001-4181.
  114. Prasad, J.V.R., Zhao, J. and Peters, D.A., “Modeling of Rotor Dynamic Wake Distortion during Maneuvering Flight,” Proceedings of the 2001 AIAA Atmospheric Flight Mechanics Conference, Montreal, Canada, August 6 – 9, 2001, AIAA-2001-4074.
  115. Yavrucuk, I., Prasad, J.V.R. and Calise, A.J., “Adaptive Limit Detection and Avoidance for Carefree Maneuvering,” Proceedings of the 2001 AIAA Atmospheric Flight Mechanics Conference, Montreal, Canada, August 6-9, 2001, AIAA-2001-4003.
  116. Yavrucuk, I., Unnikrishnan, S., Prasad, J.V.R. and Calise, A.J., “Adaptive Limit and Control Margin Prediction and Limit Avoidance,” Proceedings of the 2002 Annual Forum of the American Helicopter Society, Montreal, Canada, June 11-13, 2002.
  117. Nicholas, J., Clark, B., Ward, D., Jeram, G., Prasad, J.V.R., “Development of Artificial Neural Networks for the HACT Flight Control system.” Proceedings of the 58th American Helicopter Society Annual Forum, Montreal, Canada, June 2002.
  118. Basset, P. and Prasad, J.V.R., “Study of the Vortex Ring State Using Bifurcation Theory,” Proceedings of the 2002 Annual Forum of the American Helicopter Society, Montreal, Canada, June 11-13, 2002.
  119. Zhao, J., Prasad, J.V.R. and Peters, D.A., “Dynamic Rotor Wake Distortion Model for Helicopter Maneuvering Flight,” Proceedings of the 2002 Annual Forum of the American Helicopter Society, Montreal, Canada, June 11-13, 2002.
  120. Prasad, J.V.R., Zhao, J. and Peters, D.A., “Simplified Dynamic Wake Distortion Model for Helicopter Transitional Flight,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Monterey, CA, August 5 -8, 2002, AIAA-2002-4400.
  121. Yavrucuk, I., Prasad, J.V.R. and Calise, A.J., “Carefree Maneuvering using Adaptive Neural Nets,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Monterey, CA, August 5 -8, 2002, AIAA-2002-4495. (won the conference best student paper award)
  122. Corban, J., Calise, A.J., Prasad, J.V.R., Hur, J. and Kim, N., “Flight Evaluation of Adaptive High Bandwidth Control Methods for Unmanned Helicopters,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Monterey, CA, August 5 -8, 2002, AIAA-2002-4441.
  123. Prasad, J.V.R., Yavrucuk, I. and Unnikrishnan, S., “Adaptive Limit Detection and Avoidance for Rotorcraft,” Proceedings of the 28th European Rotorcraft Forum, Bristol, UK, September 17-20, 2002.
  124. Prasad, J.V.R., Zhao, J. and Peters, D.A., “Helicopter Rotor Wake Distortion Models for Maneuvering Flight,” Proceedings of the 28th European Rotorcraft Forum, Bristol, UK, September 17-20, 2002.
  125. Yavrucuk, I. and Prasad, J.V.R., “Adaptive Limit Margin Prediction and Control Cueing for Carefree Maneuvering of VTOL Aircraft,” Proceedings of the AHS Flight Controls and Crew System Design Technical Specialists’ Meeting, Philadelphia, PA, October 9-11, 2002.
  126. Iboshi, N., Itoga, N., Nagashima, T., Hayata, Y., and Prasad, J.V.R., “Blade Flapping Motion of a Rotor Hovering above a Finite Inclined Ground Plane for Partial and Full Ground Effect Cases,” Proceedings of the AHS International meeting on Advanced Rotorcraft Technology and Life Saving Activities, Tochigi, Japan, November 11-13, 2002.
  127. Zhao, J., Prasad, J.V.R. and Peters, D.A., “Investigation of Wake Curvature Dynamics for Helicopter Maneuvering Flight Simulation,” Proceedings of the 59th American Helicopter Society Annual Forum, Phoenix, AZ, May 6-8, 2003.
  128. Jeram, G. and Prasad, J.V.R., “Fuzzy Logic Detector for Aircraft Coupling and Piloted Induced Oscillation,” Proceedings of the 59th American Helicopter Society Annual Forum, Phoenix, AZ, May 6-8, 2003.
  129. Yavrucuk, I., Unnikrishnan, S. and Prasad, J.V.R., “Envelope Protection in Unmanned Aerial Vehicles,” Proceedings of the 59th American Helicopter Society Annual Forum, Phoenix, AZ, May 6-8, 2003. (Received the best paper of the session award)
  130. Dhingra, M., Neumeier, Y., Prasad, J.V.R. and Shin, H-W, “Stall and Surge Precursors in Axial Compressors,” Proceedings of the 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Huntsville, AL, July20-23, 2003, AIAA Paper-2003-2245.
  131. Prasad, J.V.R., Unnikrishnan, S. and Yavrucuk, I., “Envelope Protection Systems for UAVs,” Proceedings of the 4th Australian Pacific Vertiflite Conference on Helicopter Technology, Melbourne, Australia, July 21-23, 2003.
  132. Unnikrishnan, S., Prasad, J.V.R. and Calise, A.J.,” Adaptive Dynamic Trim Prediction for Limit Detection and Avoidance,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Austin, TX, August 11-14, 2003, AIAA-2003-5698.
  133. Jeram, G. and Prasad, J.V.R., “Tactile Avoidance Cueing for Pilot Induced Oscillation,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Austin, TX, August 11-13, 2003, AIAA-2003-5311.
  134. Zhao, J., Prasad, J.V.R. and Peters, D.A., “A Simplified Model for Main Rotor/Tail Rotor/Empennage Interactions during Helicopter Maneuvering Flight,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Austin, TX, August 11-14, 2003, AIAA-2003-5614.
  135. Corban, J., Calise, A.J., Prasad, J.V.R., Heynen, G., Koenig, B. and Hur, J., “Flight Evaluation of an Adaptive Velocity Command System for Unmanned Helicopters,” Proceedings of the AIAA Guidance, Navigation, and Control Conference and Exhibit, Austin, Texas, August 11-14, 2003, AIAA-2003-5594.
  136. Unnikrishnan, S., Jeram, G. and Prasad, J.V.R., “Tactile Limit Avoidance Cueing using Adaptive Dynamic Trim,” Proceedings of the 60th America Helicopter Society Annual Forum, Baltimore, MD, June 7-10, 2004.
  137. Sahani, N., Horn, J., Jeram, G. and Prasad, J.V.R., “Hub Moment Limit Cueing using Neural Network Prediction,” Proceedings of the 60th America Helicopter Society Annual Forum, Baltimore, MD, June 7-10, 2004.
  138. Chen, C., Prasad, J.V.R. and Bassett, P-M., “A Simplified Inflow Model of a Helicopter Rotor in Vertical Descent,” Proceedings of the 60th America Helicopter Society Annual Forum, Baltimore, MD, June 7-10, 2004.
  139. Zhao, J., Prasad, J.V.R. and Peters, D.A., “Validation of a Rotor Dynamic Wake Distortion Model for Maneuvering Flight Simulation,” Proceedings of the 60th America Helicopter Society Annual Forum, Baltimore, MD, June 7-10, 2004.
  140. Dhingra, M., Neumeier, Y. and Prasad, J.V.R., “Active Compressor Stability Management and Impact on Engine Operability,” Proceedings of the 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Fort Lauderdale, FL, July 11-14, 2004, AIAA-2004-3984.
  141. Unnikrishnan, S. and Prasad, J.V.R., “Reactionary Automatic Envelope protection for Autonomous Unmanned Aerial Vehicles,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference and Exhibit, Providence, Rhode Island, Aug. 16-19, 2004, AIAA-2004-4819.
  142. Kim, N., Calise, A.J., Corban, E. and Prasad, J.V.R., “Adaptive Output Feedback for Altitude Control of an Unmanned Helicopter using Rotor RPM,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Providence, RI, August-16,19, 2004, AIAA-2004-5323.
  143. Prasad, J.V.R., Chen C., Basset, P-M. and Kolb, S., “Simplified Modeling and Nonlinear Analysis of a Helicopter Rotor In Vortex Ring State,” Proceedings of the 30th European Rotorcraft Forum, Marseille, France, September 14-16, 2004.
  144. Jeram, G. and Prasad, J.V.R., “Open Platform for Limit Display, Carefree Maneuver and Limit Protection,” Proceedings of the 30th European Rotorcraft Forum, Marseille, France, September 14-16, 2004.
  145. Johnson, E., Schrage, D.P., Prasad, J.V.R. and Vachtsevanos, G., “UAV Flight Test Programs at Georgia Tech,” Proceedings of the AIAA 3rd “Unmanned Unlimited” Technical Conference, Workshop and Exhibit, Chicago, IL, September 20-23, 2004.
  146. Chen, C. and Prasad, J.V.R., “A Simplified Inflow Model of a Helicopter Rotor in Forward Descent,” Proceedings of the AIAA Aerospace Sciences Meeting & Exhibit, Reno, NV, January 10-13, 2005, AIAA-2005-622.
  147. Jeram, G. Sahani, N.A., Prasad, J.V.R. and Horn, J.F., “Distributing Limit Protection between Autonomous Restraint and Voluntary Tactile Cues, “ Proceedings of the 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, Jan. 10-13, 2005, AIAA-2005-30.
  148. Johnson, E.N., Schrage, D.P., and Prasad, J.V.R., “Flight Test Results of Fault Tolerant Control Systems on Small and Micro Rotorcraft,” Proceedings of the AHS International Specialists’ Meeting on Unmanned Rotorcraft Development, January, 2005.
  149. Unnikrishnan, S., Jeram, G. and Prasad, J.V.R., “Optimal Control Formulation and Nonlinear Trajectory Generation for Envelope Protection,” Proceedings of the 61st American Helicopter Society Annual Forum, Grapevine, TX, June 1-3, 2005.
  150. Unnikrishnan, S., Yavrucuk, I. and Prasad, J.V.R., “Reactionary Envelope Protection for Autonomous UAVs,” Proceedings of the 61st American Helicopter Society Annual Forum, Grapevine, TX, June 1-3, 2005.
  151. Chen, C. and Prasad, J.V.R., “Ring Vortex Model for Helicopter Descent Flight,” Proceedings of the 61st American Helicopter Society Annual Forum, Grapevine, TX, June 1-3, 2005.
  152. Zhao, J., Prasad, J.V.R. and Peters, D.A., “Effect of Rotor Wake Distortion on the Stability of Flapping Dynamics,” Proceedings of the 61st American Helicopter Society Annual Forum, Grapevine, TX, June 1-3, 2005.
  153. Luxin, L., Neumeier, Y. and Prasad, J.V.R., “Active Flow Control for Enhanced Compressor Performance,” Proceedings of the 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, July 10-13, 2005, Tucson, AZ, Paper No. AIAA-2005-4017.
  154. Drozeski, G., Yavrucuk, I., Johnson, E., Prasad, J.V.R., Schrage, D.P. and Vachtsevanos, G. “Application of a Software Enabled Control Technologies to a Full Scale Unmanned Helicopter,” Proceedings of the 2005 AIAA Atmospheric Flight Mechanics Conference, San Francisco, CA, August 15-18, 2005, Paper No. AIAA-2005-6292.
  155. Dhingra, M., Armor, J., Neumeier, Y. and Prasad, J.V.R., “Compressor Surge: A Limit Detection and Avoidance Problem,” Proceedings of the 2005 AIAA Guidance, Navigation and Control Conference, San Francisco, CA, August 15-18, 2005, Paper No. AIAA-2005-6449.
  156. Chen C. and Prasad, J.V.R., “Theoretical Investigations of a Helicopter Rotor in Steep Descents,” Proceedings of the AIAA Modeling and Simulation Technologies Conference and Exhibit, San Francisco, CA, August 15-18, 2005, Paper No. AIAA-2005-6292.
  157. Unnikrishnan, S. and Prasad, J.V.R., “Flight Evaluation of Reactionary Envelope Protection System for UAVs,” Proceedings of the 2006 AHS Forum, Phoenix, AZ, May 9-11, 2006.
  158. Moon, Jongki, Prasad, J.V.R. and Calise, A.J., “Guidance Law for Formation Flight of UAVs: An Adaptive Approach,” Proceedings of the 2006 AHS Forum, Phoenix, AZ, May 9-11, 2006.
  159. Chen, C., Prasad, J.V.R., Bassett, P-M. and Kolb, S., “Prediction of VRS Boundaries of Helicopters in Descent Flight,” Proceedings of the 2006 AHS Forum, Phoenix, AZ, May 9-11, 2006.
  160. Prasad, J.V.R., Zhao, J. and Shanthakumaran, P., “Pilot-in-the-Loop Simulation Evaluations of a Dynamic Wake Distortion Model,” Proceedings of the 2006 AHS Forum, Phoenix, AZ, May 9-11, 2006.
  161. Christensen, D., Cantin, P., Gutz, D., Szucs, P.N., Wadia, R.,  Armor, J.,  Dhingra, M., Neumeier, Y., Prasad, J.V.R., “Development and Demonstration of a Stability Management System for Gas Turbine Engines,” Proceedings of the ASME/IGTI TurboExpo, May 2006, GT2006- 90324 (Nominated for the “ASME 2006 John B. Davis Best Paper Award”, Won the 2009 ASME ‘Melville’ medal) .
  162. Dhingra, M., Neumeier, Y., Prasad, J.V.R., Breeze-Stringfellow, A, Shin, H-W., Szucs, P.N., “A Stochastic Model for a Compressor Stability Measure,” Proceedings of the ASME/IGTI TurboExpo, May 2006, GT2006-91182. (Won the “Best Paper of the Conference” award from the ASME Instrumentation and Control Committee.)
  163. Prasad, J.V.R. and Chen, C., “Prediction of Vortex Ring State Using Ring Vortex Model for Single-Rotor and Multi-Rotor Configurations,” Proceedings of the AIAA Atmospheric Flight Mechanics Conference and Exhibit, Keystone, Colorado, Aug. 21-24, 2006, AIAA-2006-6632.
  164. Unnikrishnan, S. and Prasad, J.V.R., “Carefree Handling using a Reactionary Envelope Protection Method,” Proceedings of the AIAA Guidance, Navigation and Control Conference and Exhibit, Keystone, Colorado, Aug. 21-24, 2006.
  165. Prasad, J.V.R. and Chen, C., “A Reduced Order Inflow Model for a Helicopter Rotor in Descent Flight including the Vortex Ring State,” Proceedings of the 2006 Heli Japan, Nagoya, Japan, November 15-17, 2006.
  166. Schrage, D.P., Volovoi, V., Johnson, E., Prasad, J.V.R. and Costello, M. “An Integrated Simulation and Flight Testing Approach for Development, Verification and Validation of Unmanned Aerial Systems (UAS) Airworthiness Criteria,” Proceedings of the 2007 AHS Specialists Meeting on Unmanned Rotorcraft: Design, Control and Testing, Chandler, AZ, January 23-25, 2007.
  167. Prasad, J.V.R., Dhingra, M. and Neumeier, Y., “Turboshaft Engine Operability Enhancement via an Active Surge margin Detection Scheme,” Proceedings of the 2007 AHS Forum proceedings, Virginia Beach, VA, May 1 – 3, 2007.
  168. Moon, J., Sattigeri, R., Prasad, J.V.R. and Calise, A.J., “Adaptive Guidance and Control for Formation Flying,” Proceedings of the 2007 AHS Forum, Virginia Beach, VA, May 1 – 3, 2007.
  169. Dhingra, M., Liu, J., Neumeier, Y. and Prasad, J.V.R., “Compressor Stability Detection on a Turboshaft Engine with a Hybrid Axi-Centrifugal Compressor,” Proceedings of the 2007 AIAA Joint Propulsion Conference, July 10, 2007.
  170. Prasad, J.V.R., Moon, J. and Kim, C-J., “Obstacle Avoidance with Envelop Protection for Autonomous UAVs,” Proceedings of the International Forum on Rotorcraft Multidisciplinary Technology, Seoul, Korea, October 15-16, 2007.
  171. Prasad, J.V.R., Calise, A.J., Johnson, E.N., Sattigeri, R. and Moon, J., “Flight Demonstration of an Adaptive Guidance Controller for Formation Flight,” Proceedings of the Annual Forum of the American Helicopter Society, Montreal, Canada, April 2008.
  172. Moon, J. and Prasad, J.V.R., “Reactive Obstacle Avoidance for Autonomous UAVs: An Envelope Protection Based Approach,” Proceedings of the Annual Forum of the American Helicopter Society, Montreal, Canada, April 2008.
  173. Iboshi, N., Noriaki, I., Prasad, J.V.R. and Sankar, L., “Ground Effect of a Rotor Hovering above a Confined Area,” Proceedings of the Annual Forum of the American Helicopter Society, Montreal, Canada, April 2008.
  174. Rigsby, J. and Prasad, J.V.R., “Stability and Control Issues Associated with Lightly Loaded Autorotating Rotors in High Advance Ratio Flight,” Proceedings of the Annual Forum of the American Helicopter Society, Montreal, Canada, April 2008.
  175. Liu, Y., Dhingra, M. and Prasad, J.V.R., “Benefits of Active Stability Management on Turbofan Engine Operability,” Proceedings of the ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, Germany, June 9-13, 2008, Paper No. GT2008-51307.
  176. Bain, J., Sankar, L. N.,  Prasad, J.V.R., Bauchau, O., Peters, D., and He, C., “Computational Modeling of Variable Droop Leading Edge in Forward Flight,” AIAA-2008-3872,  Proceedings of the 4th Flow Control Conference, Seattle, Washington, June 23-26, 2008.
  177. Min, B. Y., Sankar, L. N., Rajmohan, N., and Prasad, J.V.R., ” Computational Investigation of the Effects of Gurney Flap on the Forward Flight Characteristics of Helicopter Rotors,” AIAA Paper 2008-6726, Proceedings of the 26th AIAA Applied Aerodynamics Conference, Honolulu, Hawaii, Aug. 18-21, 2008.
  178. Grill, I., Dhingra, M. and Prasad, J.V.R., “Methods for Real Time Rotor Stall Detection,” Proceedings of the 34th European Rotorcraft Forum, Liverpool, UK, September 16 – 19, 2008.
  179. Prasad, J.V.R., Olcer, F.E., Sankar, L,N. and He, C., “Linear Models for Integrated Flight and Rotor Control,” Proceedings of the 34th European Rotorcraft Forum, Birmingham, UK, September 16-18, 2008.
  180. Hoencamp, A., van Holten, Th., Prasad, J.V.R., Pavel, M.D. and de Laat, T.W.G., “Relevant Aspects of Helicopter-Ship Operations,” Proceedings of the 34th European Rotorcraft Forum, Birmingham, UK, September 16-18, 2008.
  181. Moon, J. and Prasad, J.V.R., “Aggressive Maneuvering for Obstacle Avoidance with Envelope Protection for Autonomous UAVs, “ Proceedings of the International Specialists’ Meeting on Unmanned Rotorcraft Systems, Phoenix, AZ, January 20 -22, 2009.
  182. Grill, I., Prasad, J.V.R., Kim, S-J., Vachtsevanos, G., “Analysis of Real Time Rotor Stall Detection Methods,” Proceedings of the 65th Annual Forum of the American Helicopter Society, Grapevine, TX, May 27 – 29, 2009.
  183. Moon, J. and Prasad, J.V.R., “Minimum-time Approach to Obstacle Avoidance Constrained by Envelope Protection for Autonomous UAVs,” Proceedings of the 65th Annual Forum of the American Helicopter Society, Grapevine, TX, May 27 – 29, 2009.
  184. Min, B-Y., Sankar, L., Prasad, J.V.R. and Schrage, D.P., “A Physics Based Investigation of Gurney Flaps for Rotor Vibration Reduction,” Proceedings of the 65th Annual Forum of the American Helicopter Society, Grapevine, TX, May 27 – 29, 2009.
  185. White, M., Dhingra, M. and Prasad, J.V.R., “Experimental Analysis of a Waveguide Pressure Measuring System,” Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea and Air, Orlando, Florida, June 8-12, 2009, Paper No. GT2009-60182.
  186. Liu, Y., Dhingra, M. and Prasad, J.V.R., “Active Compressor Stability Management via a Stall Margin Control Mode,” Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea and Air, Orlando, Florida, June 8-12, 2009, Paper No. GT2009-60140.
  187. Bain, J., Samuel, R., Sankar, L. N. and  Prasad, J.V.R., “Neural Network Models for the On-Board and Individual Blade Control of Helicopter Rotors,” Proceedings of the  39th AIAA Fluid Dynamics Conference,  San Antonio, TX, June 22-29, 2009.
  188. Tang, L., Roemer, M., Ge, J., Crassidis, A., Prasad, J.V.R. and Belcastro, C., “Methodologies for Adaptive Flight Envelope Estimation and Protection,” Proceedings of the AIAA Guidance, Navigation and Control Conference, Chicago, IL, August 10-13, 2009.
  189. He, C., Zhao, J., Bain, J., Sankar, L. and Prasad, J.V.R., “Development of a Reduced Order Modeling Framework for Flight Mechanics Oriented Modeling of On-Blade Control Concepts,” Proceedings of the 35th European Rotorcraft Forum, Hamburg, Germany, September 22-25, 2009.
  190. Prasad, J.V.R., Olcer, E., Sankar, L.N. and He, C., “Linear Time Invariant Models for Integrated Flight and Rotor Control,” Proceedings of the 35th European Rotorcraft Forum, Hamburg, Germany, September 22-25, 2009.
  191. Clark, B.M., Bain, J.J, Sankar, L.N. and Prasad, J.V.R., “Modeling Dynamic Stall of the SC-1095 Airfoil at High Mach Number, “Proceedings of the AIAA Aerospace Sciences Meeting, Orlando, FL, January 4-7, 2010, AIAA-2010-877.
  192. Rigsby, J. and Prasad, J.V.R., “Performance and Trim Analysis of Lightly Loaded Rotors in High Advance Ratio,” Proceedings of the American Helicopter Society Aeromechanics Specialists Conference, San Francisco, CA, January 20-22, 2010.
  193. Olcer, F. E., Prasad, J.V.R., Sankar, L.N., Bain, J. J, Zhao, J. and He. C., “Development and Evaluation of Reduced Order Models of On-Blade Control for Integrated Flight and Rotor Control,” Proceedings of the American Helicopter Society 66th Annual Forum, Phoenix, AZ, May 11-13, 2010.
  194. Kang, K., Ottander, J., Prasad, J.V.R. and Johnson, E. J., “Active Control of a UAV Helicopter with a Slung Load for Precision Airborne Cargo Delivery,” Proceedings of the American Helicopter Society 66th Annual Forum, Phoenix, Arizona, May 11-13, 2010.
  195. Prasad, J.V.R., Kang, K-R., Vu, A., Dhingra, M. and Johnson, E.N., “Optimal Obstacle Avoidance Constrained by Envelope Protection for Autonomous UAVs,” Proceedings of the 2010 Heli Japan, Sitama, Japan, November 1 –  3, 2010.
  196. Kang, K., Dhingra, M. and Prasad, J.V.R., “Simulation Evaluation of an Optimal Multiple Obstacle Avoidance Algorithm for Autonomous UAVs,” Proceedings of the American Helicopter Society 66th Annual Forum, Virginia Beach, VA, May 3 – 5, 2011.
  197. Olcer, F.E. and Prasad, J.V.R., “A Methodology for Evaluation of Coupled Rotor-Body Stability using Reduced Order Linear Time Invariant (LTI) Models,“ Proceedings of  the American Helicopter Society 66th Annual Forum, Virginia Beach, VA, May 3 – 5, 2011.
  198. Liu, Y., Dhingra, M. and Prasad, J.V.R., “Correlation Measure-Based Stall Margin Estimation for a Single-Stage Axial Compressor,” Proceedings of the ASME Turbo Expo 2011: Power for Land, Sea and Air, Vancouver, Canada, June 6 -10, 2011. Paper No. GT2011-46326.
  199. Chung, G-Y., Dhingra, M., Prasad, J.V.R., Meisner, R. and Sirica, “Linearized Engine Models in a Cascaded Form,” Proceedings of the ASME Turbo Expo 2011: Power for Land, Sea and Air, Vancouver, Canada, June 6 -10, 2011. Paper No. GT2011-45371.
  200. Dhingra, M., Prasad, J.V.R., Tiwari, P., Nakano, T. and Breeze-Stringfellow, A., “ Impact of Inter-Stage Dynamics on Stalling Stage Identification,” Proceedings of the ASME Turbo Expo 2011: Power for Land, Sea and Air, Vancouver, Canada, June 6 -10, 2011. Paper No. GT2011-46668.
  201. Kang, K., Prasad, J.V.R. and Johnson, E., “An Integrated Framework forAdaptive Optimal Obstacle Avoidance for Rotarywing UAVs,”  Proceedings of the 2012 Annual Forum of the American Helicopter Society, Fort Worth, Texas, May 1 – 3, 2012.
  202. Rajmohan, N., Zhao, J., He, C., Kim, J., Sankar, L. and Prasad, J.V.R., “An Efficient POD based Technique to Model Rotor/Ship Airwake Interaction,” Proceedings of the 2012 Annual Forum of the American Helicopter Society, Fort Worth, Texas, May 1 – 3, 2012.
  203. Reema, K., Prasad, J.V.R., Tiwari, P., Breeze-Stringfellow, A., Szucs, P., Nakano, T. and Pritchard, B., “Impact of Engine Icing on Jet Engine Compressor Flow Dynamics,” Proceedings of the 48th AIAA/SAE/ASME/ASEE Joint Propulsion Conference, Atlanta, GA, July 29 – August 1, 2012.
  204. Prasad, J.V.R., Nowak, M. and Xin, H., “Finite State Inflow Models for a Coaxial Rotor in Hover,” Proceedings of the 38th European Rotorcraft Forum, Amsterdam, Netherlands, September 3 – 6, 2012.
  205. Lopez, M. and Prasad, J.V.R., “Linear Time Invariant Approximations of Time Periodic Systems,” Proceedings of the 38th European Rotorcraft Forum, Amsterdam, Netherlands, September 3 – 6, 2012.
  206. Zhou, M. and Prasad, J.V.R., “Trajectory Optimization for a Fuel Cell Powered Tilt Quad-Rotor UAV in Forward Flight,” Proceedings of the AHS International Specialists’ Meeting on Unmanned Rotorcraft, Phoenix, AZ, January 22-24, 2013.
  207. Lopez, M. and Prasad, J.V.R., “Fidelity of Reduced Order Time Invariant Linear (LTI) Models for Integrated Flight and Rotor Control Applications,” Proceedings of the 69th American Helicopter Society International Forum, Phoenix, AZ, May 21 – 23, 2013.
  208. Coisnon, R. and Prasad, J.V.R., “Safety Metrics for Obstacle Avoidance Trajectories for an Autonomous Helicopter,” Proceedings of the 69th American Helicopter Society International Forum, Phoenix, AZ, May 21 – 23, 2013.
  209. Zhou, M. and Prasad, J.V.R., “Transient Characteristics of a Fuel-Cell Powered UAV Propulsion System,” Proceedings of the 2013 International Conference on Unmanned Aircraft Systems, Atlanta, GA, May 2013.
  210. Chung, G., Prasad, J.V.R., Dhingra, M. and Meisner, R., “Real Time Analytical Linearization of a Turbofan Engine Model,” Proceedings of the 2013 ASME Turbo Expo, June 2013. Paper No. GT2013-94464. (Won the “Best Paper of the Conference” award from the ASME Instrumentation and Control Committee.)
  211. Nowak, M., Prasad, J.V.R., Xin, H. and Peters, D.A., “A Potential Flow Model for Co-Axial Rotors in Forward Flight,” Proceedings of the 39th European Rotorcraft Forum, Moscow, Russia, September 3 – 6, 2013.
  212. Lopez, M. and Prasad, J.V.R., “Periodic System Analysis using a Linear Time Invariant Formulation,” Proceedings of the 39th European Rotorcraft Forum, Moscow, Russia, September 3 – 6, 2013.
  213. Morgan, N., Fei, Z., Peters, D.A. and Prasad, J.V.R., “Improved Finite State Inflow Convergence through the use of a Blended Model,” Proceedings of the Fifth Decennial AHS Aeromechanics Specialists Conference, San Francisco, January 22 – 24, 2014.
  214. Padthe, A.K., Friedmann, P.P. and Prasad, J.V.R., “High Fidelity Linear Time Invariant Models for Rotor and Flight Control Interaction Studies,” Proceedings of the Fifth Decennial AHS Aeromechanics Specialists Conference, San Francisco, January 22 – 24, 2014.
  215. Lopez, M., Mannivan, V., Prasad, J.V.R., Tischler, M.B., Takahashi, M.D. and Cheung, K.K., “HHC/AFCS Interaction and Performance using Piloted Simulation Evaluations,” Paper presented at the AHS Rotorcraft Handling Qualities Specialists’ Meeting, Huntsville, AL, Feb 19-20, 2014.
  216. Nowak, M., Prasad, J.V.R. and Peters, D.A. “Development of a Finite State Model for a Co-Axial Rotor in Forward Flight,” Proceedings of the American Helicopter Society 70th Annual Forum, Montreal, Canada, May 20-22, 2014.
  217. Huang, J., Peters, D.A., Nowak, M. and Prasad, J.V.R., “Converged Velocity Field for Rotors by a Blended Potential Flow method,” Proceedings of the American Helicopter Society 70th Annual Forum, Montreal, Canada, May 20-22, 2014.
  218. Kundu, R., Prasad, J.V.R., Saxena, S., Singh, R.K., Breeze-Stringfellow, A., Nakano, T., “Modeling and Analysis of Ice Shed in Multistage Compressor of Jet Engines,” Proceedings of the AIAA Joint propulsion Conference, Atlanta, GA, July 2014.
  219. Sankar, L., Prasad, J.V.R., Jagoda, J., “Recent Advances in Small Engine Technology,” Paper presented at the Australian Vertiflite Conference on Helicopter Technology, Melbourne, Australia, Dec 18 – 19, 2014.
  220. Jeram, G. and prasad, J.V.R., “Metamodeling Heliplane Take-Off Trajectories for Aeroacoustic Analysis,” Paper presented at the Australian Vertiflite Conference on Helicopter Technology, Melbourne, Australia, Dec 18 – 19, 2014.
  221. Lopez, M., Prasad, J.V.R., Tischler, M. B., Takahashi, M. D., and Cheung, K. K., “Simulating HHC/AFCS Interaction and Optimized Controllers using Piloted Maneuvers,” American Helicopter Society 71st Annual Forum Proceedings, Virginia Beach, Virginia, May 5-7, 2015.
  222. Kong, Y. B., Prasad, J. V. R., and He, C., “Analysis of a finite state coaxial rotor inflow
  223. model,” in Proceedings of the 41st European Rotorcraft Forum, Munich, Germany, Sept. 2015.
  224. Padthe, A. and Friedmann, P.P., Lopez, M., and Prasad, J. V. R., “Analysis of High-Fidelity Reduced-Order Linearized Time-Invariant Helicopter Models for Integrated Flight and On-Blade Control applications,” Proceedings of the 41st European Rotorcraft Forum, Munich, Germany, Sept 1-4, 2015.
  225. Lopez, M. and Prasad, J.V.R., “Linear Time Invariant Approximations of Time Periodic Systems,” Proceedings of the 41st European Rotorcraft Forum, Munich, Germany, Sept. 1-4, 2015.
  226. Kundu, R., Prasad, J.V.R. and Neumeier, Y., “Validation of a 1-D Transient Simulation of a Multi-Stage Axial Compressor,” Proceedings of the 2015 IGTI-India Conference, Hyderabad, India, Dec 1 – 4, 2015.
  227. Kim, J., Sankar, L.N. and Prasad, J.V.R., “Application of a Navier-Stokes Free Wake Hybrid Methodology to the Harrington Coaxial Rotor,” Proceedings of the AHS Technical Meeting on Aeromechanics Design for Vertical Lift, San Francisco, CA, January 20 -22, 2016.
  228. Kong, Y. B., Kim J. W., Prasad, J. V. R., and Sankar L. N., “Finite State Coaxial rotor Inflow Model Improvements via System Identification,” Paper accepted for presentation at the 72nd Annual Forum of AHS International, May 17-19, West Palm Beach, Florida, May 17-19, 2016.
  229. Morgan, N., Lopez, M., Caitlin, B. and Prasad, J.V.R., “Application of Linear Quadratic Estimation (LQE) to Harmonic Analysis of Rotorcraft Vibration,” Paper accepted for presentation at the 72nd Annual Forum of AHS International, May 17-19, West Palm Beach, Florida, May 17-19, 2016.