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Authors
Cedric Seren; Francois Bommier; Alain Bucharles; Laurent Verdier; Daniel Alazard

Digital Object Identifier (DOI)
10.3182/20060329-3-AU-2901.00099

Page Numbers:
642-647

Index Terms
aircraft,dynamics,modelling,identification,parameter estimation,simulation,protocols,optimization,genetic algorithms,dynamic programming

Abstract
The growing development of numerical simulation in aviation industry raises the issue of the quality of the models implemented. Flight test protocols are designed and flown to adjust the coefficients of the predicted aerodynamic model to the real aircraft in order to improve the flight dynamics model accuracy. The aircraft model becomes of major importance in every new aircraft program. Consequently, the constraint on its reliability increases. This paper describes a new optimization methodology using Genetic Algorithms (GA) for the design of optimal flight test protocols and provides a comparison with alternative method such as Dynamic Programming (DP).

References

[1] Chen, R. T. N. (1975). Input Design for Aircraft
     Parameter Identification: using time-optimal
     control formulation. AGARD-CP-
    172, paper 13.
[2] Deb, K. (2004). In: Multi-Objective Optimization
    using Evolutionary Algorithms (S. Ross and
    R. Weber, Ed.). John Wiley & Sons, Ltd.
    Chicester.
[3] Etkin, B. and L. D. Reid (1996). In: Dynamics of
    Flight: Stability and Control (3rd Ed.). John
    Wiley & Sons, Ltd.
[4] Gupta, N. K., R. K. Mehra and W. E. Hall, Jr.,
    (1976). Application of Optimal Input Synthesis
     to Aircraft Parameter Identification. Journal
     of Dynamic Systems, Measurement and
    Control, 98, No. 2, pp. 139-45.
[5] Morelli, E. A. (1993). Practical Input Optimization
     for Aircraft Parameter Estimation Experiments.
     PhD. Report, George Washington
    University JIAFS, DC.
[6] Morelli, E. A. and V. Klein (2005). Application of
    System Identification to Aircraft at NASA
    Langley Research Center. Journal of Aircraft
    , 42, pp. 12-25.
[7] Mulder, J. A., J. K. Sridhar and J. H. Breeman
    (1994). Identification of Dynamic Systems-Applications
     to Aircraft: Part 2: Nonlinear
    Analysis and Manoeuvre Design. AGARDAG
    -300, 3, Part 2.
[8] Plaetschke, E. and G. Schulz, (1979). Practical Input
     Signal Design. AGARD-LS-104, paper 3.