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Abstract
This paper describes a novel technique for near real time estimation of non-linear aerodynamic coefficient dependencies on one or more independent variables. It is important from the point of view of updating the aerodynamic database of six DOF simulations subsequent to flight test. The technique is validated using the six DOF simulated data. The novelty about this technique is the combined utilization of linear interpolation and recursive least squares estimation to capture nonlinear functional dependencies that makes it suitable for multidimensional near real time estimation. The technique is preceded by data compatibility check using Extended Kalman filter.
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References
- Ravindra V. Jategaonkar., "Flight Vehicle System Identification a Time Domain Methodology", Progress in Astronautics and Aeronautics,Vol.216, Published by AIAA, 2006.
- Raol, J.R., Girija, G. and Singh, J., "Modeling and Parameter Estimation of Dynamic Systems", IEE Control Series, Vol. 65, IEE, U.K, August 2004.
- Joseph R. Chambers., "Overview of Stall/Spin Technology", AIAA Atmospheric Flight Mechanics Conference, Paper No. 80-1580, 1980.
- Thomas, H.H.B.M., "On Problems of Flight Over an Extended Angle of Attack Range", Aeronautical Jounal, pp. 412-423.
- Vladislav Klein and James G. Batterson., "Determination of Airplane Model Structure from Flight Data Using Splines and Stepwise Regression", NASA Technical Paper 2126, 1983.
- Thomas L. Trankle and Stephen D. Bachner., "Identification of a Nonlinear Aerodynamic Model of the F-14 Aircraft", Journal of Guidance, Control and Dynamics, Vol. 18, No. 6, November-December 1995, pp. 1292-1297.
- Kendall W. Neville and Thomas Stephens, A., "Flight Update of Aerodynamic Math Model", AIAA
- Conference, Paper No. 3596-CP, 1993.
- Jategaonkar, R.V. and Monnich, W., "Identification of DO-328 Aerodynamic Database for a Level D
- Flight Simulator", AIAA Conference, Paper No. 3729, 1997.
- Goman, M. and Khrabrov, A., "State Space Representation of Aerodynamic Characteristics of an Aircraft at High Angles of Attack", AIAA Atmospheric Flight Mechanics Conference, Paper No. 92-4651,
- Kamali, C., Pashilkar A.A. and Raol, J.R., "Real Time Parameter Estimation for Reconfigurable Control of Unstable Aircraft", Defence Science Journal, Vol.57, No.4, pp.527-537, July 2007.
- Pashilkar, A.A., Kamali, C. and Raol, J.R., "Direct Estimation of Nonlinear Aerodynamic Coefficients",
- AIAA Atmospheric Flight Mechanics Conference and Exhibit, Paper No. AIAA 2007-6720, August
References
Ravindra V. Jategaonkar., "Flight Vehicle System Identification a Time Domain Methodology", Progress in Astronautics and Aeronautics,Vol.216, Published by AIAA, 2006.
Raol, J.R., Girija, G. and Singh, J., "Modeling and Parameter Estimation of Dynamic Systems", IEE Control Series, Vol. 65, IEE, U.K, August 2004.
Joseph R. Chambers., "Overview of Stall/Spin Technology", AIAA Atmospheric Flight Mechanics Conference, Paper No. 80-1580, 1980.
Thomas, H.H.B.M., "On Problems of Flight Over an Extended Angle of Attack Range", Aeronautical Jounal, pp. 412-423.
Vladislav Klein and James G. Batterson., "Determination of Airplane Model Structure from Flight Data Using Splines and Stepwise Regression", NASA Technical Paper 2126, 1983.
Thomas L. Trankle and Stephen D. Bachner., "Identification of a Nonlinear Aerodynamic Model of the F-14 Aircraft", Journal of Guidance, Control and Dynamics, Vol. 18, No. 6, November-December 1995, pp. 1292-1297.
Kendall W. Neville and Thomas Stephens, A., "Flight Update of Aerodynamic Math Model", AIAA
Conference, Paper No. 3596-CP, 1993.
Jategaonkar, R.V. and Monnich, W., "Identification of DO-328 Aerodynamic Database for a Level D
Flight Simulator", AIAA Conference, Paper No. 3729, 1997.
Goman, M. and Khrabrov, A., "State Space Representation of Aerodynamic Characteristics of an Aircraft at High Angles of Attack", AIAA Atmospheric Flight Mechanics Conference, Paper No. 92-4651,
Kamali, C., Pashilkar A.A. and Raol, J.R., "Real Time Parameter Estimation for Reconfigurable Control of Unstable Aircraft", Defence Science Journal, Vol.57, No.4, pp.527-537, July 2007.
Pashilkar, A.A., Kamali, C. and Raol, J.R., "Direct Estimation of Nonlinear Aerodynamic Coefficients",
AIAA Atmospheric Flight Mechanics Conference and Exhibit, Paper No. AIAA 2007-6720, August