J.V.R. PRASAD
PROFESSOR
SCHOOL OF AEROSPACE ENGINEERING
GEORGIA INSTITUTE OF TECHNOLOGY
ATLANTA, GA 30332, USA
Phone: (404)894-3043
Fax: (404)894-2760
E_Mail: jvr.prasad@ae.gatech.edu
Published Parts of Books
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Mittal, M., Prasad, J.V.R. and Schrage, D.P., "Nonlinear Adaptive Control of a
Twin Lift Helicopter System," in Advances in Adaptive Control, (K.S.
Narendra, R. Ortega and P. Dorato, Editors), Piscataway, NJ, IEEE Press, 1991.
Siciliano, B., Prasad, J.V.R. and Calise, A.J., "Design of a Composite
Controller for a Two-link Flexible Manipulator," in Intelligent Robotics, pages
126-137, (M. Vidyasagar and M. Trivedi, Editors), New Delhi, Tata McGrawHill Company Limited, 1991.
Vachtsevanos, G., Rufus, F., Prasad, J.V.R., Yavrucuk, I., Schrage, D., Heck,
B., and Wills, L., “An Intelligent Methodology for Real-time Adaptive Mode
Transitioning and Limit Avoidance of Unmanned Aerial Vehicles,” SEC Book
Chapter, IEEE Press. 2002.
Wills, L.M., Kannan, S., Sander, S., Guler, M., Heck, B., Prasad, J.V.R,
Schrage, D., Vachtsevanos, G., “A Prototype Open Control Platform for
Reconfigurable Control Systems,” Software-Enabled Control: Information
Technologies for Dynamical Systems, (T. Samad and G. Balas, eds.), IEEE
Press, 22 pages, 2002.
Journal Publications
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Prasad, J.V.R. and Pierce, G.A., "Nonlinear Deformation of Rotating Beams An Alternate Method of Formulation," Journal of the American Helicopter
Society, Vol. 30, No. 2, pp. 68-70, April 1985.
Hodges, D.H., Peters, D.A., Pierce, G.A., and Prasad, J.V.R., "Comment on
'Nonlinear Deformation of Rotating Beams - An Alternate Method of
Formulation,'" Journal of the American Helicopter Society, Vol. 31, No. 3, pp.
70-71, July 1986.
Calise, A.J. and J.V.R. Prasad, "Pulse Motor Control for Maximizing Average
Velocity," Journal of Guidance, Control, and Dynamics, Vol. 12, No. 2, pp.
169-174, March-April 1989.
Calise, A.J. and Prasad, J.V.R. "Fixed-Order Compensator Design Based on
Frequency Shaped Cost Functionals," Journal of Guidance, Control, and
Dynamics, Vol. 12, No. 3, pp. 429-431, May-June 1989.
Calise, A.J. and Prasad, J.V.R., "An Approximate Loop Transfer Recovery
Method for Designing Fixed-Order Compensators." Journal of Guidance,
Control, and Dynamics.Vol. 13, No. 2, pp. 297-302, March-April 1990.
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Calise, A.J., Prasad, J.V.R., and Siciliano, B., "Design of Optimal Output
Feedback Compensators in Two-Time Scale Systems," IEEE Transactions on
Automatic Control, Vol. 35, No. 4, pp. 488-492, April 1990.
Prasad, J.V.R., Calise, A.J. and Byrns, E.V., Jr., "Active Vibration Control
using Fixed Order Dynamic Compensation with Frequency Shaped Cost
Functionals," IEEE Control Systems, Vol. 11, No. 3, pp. 71-78, April 1991.
Mittal, M., Prasad, J.V.R. and Schrage, D.P., "Nonlinear Adaptive Control of a
Twin Lift Helicopter System," IEEE Control Systems, Vol. 11, No. 3, pp. 3945, April 1991.
Prasad, J.V.R., Mittal, M. and Schrage, D.P., "Control of a Twin Lift Helicopter
System using Nonlinear State Feedback," Journal of the American Helicopter
Society, Vol. 36, No. 4, pp. 57-65, 1991.
Menon, P.K.A., Prasad, J.V.R. and Schrage, D.P., "Nonlinear Control of a
Twin-Lift Helicopter System,” Journal of Guidance, Control, and Dynamics, pp.
1287-12993, Jan-Feb., 1992. (Controller design and simulation)
Siciliano, B., Prasad, J.V.R. and Calise, A.J., and, "Two-Time Scale
Stabilization of a Flexible Arm with Output Feedback," ASME Journal of
Dynamic Systems, Measurement, and Control, Vol. 114, pp. 70-77, March
1992.
Prasad, J.V.R., Mittal, M., and Schrage, D.P., "Comparison of Stability and
Control Characteristics of Two Twin-Lift Helicopter Configurations," Nonlinear
Dynamics Journal, Vol. 3, pp. 199-223, 1992.
Costello, M., Prasad, J.V.R., Schrage, D.P. and Gaonkar, G.H., " Toward a
Unified Theory of Modeling Atmospheric Turbulence Experienced by
Helicopter Rotor Blades," Journal of the American Helicopter Society, Vol. 37,
No.2, pp. 71-75, April 1992.
George, V.V., Gaonkar, G.H., Prasad, J.V.R. and Schrage, D.P., "On the
Adequacy of Modeling Turbulence and Related Effects on Helicopter
Response," AIAA Journal, Vol. 30, No. 6, pp. 1468-1479, June 1992.
Prasad, J.V.R. and Hanagud, S.V., "Vibration Control of a Smart Structure
using Fixed Order Dynamic Compensation," Journal for Intelligent Material
Systems and Structures, Vol. 3, No. 3, pp. 501-518, July 1992.
Mittal, M. and Prasad, J.V.R., “Three Dimensional Modeling and Control of a
Twin-Lift Helicopter System,” Journal of Guidance, Control and Dynamics, Vol
16, No.1, pp. 86-95, January 1993.
Riaz, J., Prasad, J.V.R., Schrage, D.P., Gaonkar, G.H., "Atmospheric
Turbulence Simulation for Rotorcraft Applications,” Journal of the American
Helicopter Society, Vol. 38, No.1, pp. 84-88, January 1993.
Prasad, J.V.R. and Lipp, A., "Synthesis of a Helicopter Nonlinear Controller
using Approximate Model Inversion," International Journal on Mathematical
and Computer Modeling, Vol. 18, No. 3/4, pp. 89-100, 1993.
Dang, Y.Y, Gaonkar, G.H. and Prasad, J.V.R., "Parallel Methods for
Turbulence Simulation and Helicopter-Response Prediction," Journal of the
American Helicopter Society, Vol. 41, No. 3, July 1996.
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Leitner, J., Calise, A.J. and Prasad, J.V.R., "Analysis of Adaptive Neural
Networks for Helicopter Flight Control," Journal of Guidance, Control and
Dynamics, Vol. 20, No. 5, pp. 972-979, 1997.
Vachtsevanos, G., Kim, W., Al-Hassan, S., Rufus, F., Simon, M., Schrage, D.
and Prasad, J.V.R., "Mission Planning and Flight Control: Meeting the
Challenge with Intelligent Techniques," Journal of Advanced Computational
Intelligence, Vol. I, No. I, pp. 62-70, October 1997.
Rivera, C. and Prasad, J.V.R., "Identification of a Nonlinear Compressor
Model," Journal of Mathematics and Computers in Simulation, Vol. 46, pp. 585
- 592, April 1998.
Markopoulos, N., Neumeier, Y., Prasad, J.V.R. and Zinn, B.T., “Linear Versus
Quadratic Amplitude Feedback in Active Control of Compressor Rotating
Stall,” Journal of Propulsion and Power, Vol. 16, No. 6, November, 2000, pp.
1164-1173.
Itoga, N., Nagashima, T., Yoshizawa, Y. and Prasad, J.V.R., “Numerical
Method for Predicting IGE Hover Performance of a Lifting Rotor,”
Transactions of the Japan Society for Aeronautical and Space Sciences, Vol. 43,
No. 141, November 2000, pp. 122-129.
Horn, J., Calise, A.J. and Prasad, J.V.R., “Development of Envelope Protection
Systems for Rotorcraft,” Journal of the American Helicopter Society, Vol. 46,
No. 1, pp. 23 – 31, January 2001.
Krothapalli, K., Prasad, J.V.R. and Peters, D.A., “Rotorcraft Inflow Modeling
For Maneuvering Flight,” Journal of the American Helicopter Society, Vol. 46,
No. 2, pp. 129 – 139, April 2001.
Wills, L., Kannan, S., Sander, S., Gules, M., Heck, B., Prasad, J.V.R., Schrage,
D.P. and Vachtsevanos, G., “An Open Software Infrastructure for
Reconfigurable Control Systems,” IEEE Control System Magazine, Vol. 21,
No. 3, June 2001, pp.49-64.
Iboshi, N., Itoga, N., Nagashima, T., Schrage, D.P., Prasad, J.V.R., “Ground
Effect and Blade Flapping Motion of a Rotor Hovering above Finite Inclined
Ground Plane,” Journal of the Japan Society for Aeronautical and Space
Sciences, Vol. 50, pp. 264-271, 2002.
Horn, J., Calise, A.J. and Prasad, J.V.R., “Flight Envelope Limit Detection and
Avoidance,” Journal of the American Helicopter Society, Vol. 47, No. 4, pp.
253-262, October 2002.
Kim, N., Calise, A.J., Hovakimyan, N., Prasad, J.V.R. and Corban, E.,
“Adaptive Output Feedback for High Bandwidth Flight Control,” Journal of
Guidance, Control and Dynamics, Vol. 25, No. 6, pp. 993-1002, NovemberDecember, 2002.
Iboshi, N., Itoga, N., Hayata, Y., Prasad, J.V.R., “Hovering Performance of a
Rotor in an Inclined and Partial Ground Effect,” Journal of the Japan Society for
Aeronautical and Space Sciences, Vol. 51, pp. 433-440, 2003.
Iboshi, N., Itoga, N., Maeda, K., Prasad, J.V.R., “Hovering Performance of a
Rotor in a Dynamic Ground Effect,” Journal of the Japan Society for
Aeronautical and Space Sciences, Vol. 52, pp. 302-308, 2004.
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Zhao, J., Prasad, J.V.R. and Peters, D. A., “Rotor Dynamic Wake Distortion
Model for Helicopter Maneuvering Flight,” Journal of the American Helicopter
Society, Vol. 49(4), October, 2004. pp 414-424.
Jeram, G. and Prasad, J.V.R., “Open Architecture for Helicopter Tactile Cueing
Systems,” Journal of the American Helicopter Society, Vol. 50, No. 3, July
2005, pp. 238-248.
Shelton, A., Tomar, A., Prasad, J.V.R., Smith, M.J. and Komerath, N., “Active
Multiple Winglets for Improved Unmanned Aerial Vehicle Performance,
“Journal of Aircraft, Vol. 43, No. 1, January-February, 2006, pp. 110-116.
Sahani, N.A., Horn, J.F., Jeram, G.J. and Prasad, J.V.R. “Hub Moment Limit
Protection using Neural Network prediction,” Journal of the American
Helicopter Society, Vol. 51, No. 4, October 2006, pp. 331-340.
Christensen, D., Cantin, P., Gutz, D., Szucs, P.N., Wadia, A.R., Armor, J.,
Dhingra, M., Neumeier, Y., Prasad, J.V.R., “Development and Demonstration
of a Stability Management System for Gas Turbine Engines,” ASME Journal of
Turbomachinery, Vol. 130, July 2008.
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,” ASME
Journal of Engineering for Gas Turbines and Power, Vol. 129 (3), 2007, pp.
730-737.
Chen, C. and Prasad, J.V.R., “Simplified Rotor Inflow Model for Descent
Flight, “Journal of Aircraft, Vol. 44, No. 3, May-June 2007, pp.936-944.
Bassett, P-M., Chen, C., Prasad, J.V.R. and Kolb, S., “Prediction of Vortex Ring
State Boundary of a Helicopter in Descent Flight by Nonlinear Flight Dynamic
Simulation,” Journal of the American helicopter Society, Vol. 53, No. 2, April
2008, pp. 139-151.
Yavrucuk, Prasad, J.V.R. and Unnikrishnan, S. “Envelope Protection for
Unmanned Aerial Vehicles,” Journal of Guidance, Control and Dynamics, Vol.
32, No. 1, January – February 2009, pp. 248 - 261.
Bain, J.J., Sankar, L.N., Prasad, J.V.R., Bauchau, O.A., Peters, D.A. and He, C.,
“Computational Modeling of Variable-Droop Leading Edge in Forward Flight,”
Journal of Aircraft, Vol. 46, No. 2, March-April 2009, pp. 617-626.
Liu, Y., Dhingra, M. and Prasad, J.V.R., “Benefits of Active Compressor
Stability Management on Turbofan Engine Operability,” ASME Journal of
Engineering for Gas Turbines and Power, Vol. 131, July 2009, Paper No.
041601.
White, M., Dhingra, M. and Prasad, J.V.R., “Experimental Analysis of a
Waveguide Pressure Measuring System,” ASME Journal of Engineering for
Gas Turbines and Power, November 2009, Paper No. 034906GTP.
Unnikrishnan, S., Prasad, J.V.R. and Yavrucuk, I., “Flight Evaluation of
Reactionary Envelope Protection System for UAVs,” Accepted for publication
in the Journal of the American Helicopter Society, 2009.
Bin, 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,” Journal of Aircraft, Vol. 46, No. 6,
November – December 2009, pp. 1957 – 1964.