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On Nonlinear Dynamics and Flight Control at High Angles of Attack With Uncertain Aerodynamics

[+] Author Affiliations
Mateus de Freitas Virgílio Pereira, Igor Afonso Acampora Prado, Davi Ferreira de Castro, José Manoel Balthazar, Roberto Gil Annes da Silva, Airton Nabarrete

Aeronautics Institute of Technology, São José dos Campos, Brazil

Paper No. IMECE2016-67108, pp. V04BT05A029; 10 pages
doi:10.1115/IMECE2016-67108
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 4B: Dynamics, Vibration, and Control
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5055-8
  • Copyright © 2016 by ASME

abstract

In this paper we consider the flight dynamics of fighter aircraft at high angles of attack with uncertain aerodynamic coefficients. Stochastic parametric uncertainty is dealt with by employing spectral decomposition of the random variables by means of the generalized polynomial chaos expansion. We propose an optimal linear feedback strategy for the automatic pilot system to recover the aircraft from stall and provide acceptable dynamic response. Optimality of the proposed control law is proved by solving the Hamilton-Jacobi-Bellman equation and asymptotically stability of the controlled nonlinear aircraft model is guaranteed in the Lyapunov sense. Numerical results are verified with Monte-Carlo simulations.

Copyright © 2016 by ASME

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