Application of nonlinear global analysis and system identification to aircraft-pilot coupled oscillations

Author

Mehra, R.K. ; Prasanth, R.K.

Author_Institution

Sci. Syst. Co., Woburn, MA, USA

Volume

2

fYear

1998

Firstpage

1404

Abstract

We present a general framework for the global analysis of nonlinear pilot-induced oscillations (PIOs). The approach involves computation of nonlinear phenomena such as Hopf bifurcation that lead to large changes in structural stability of the pilot-vehicle system (PVS). As an example, the X-15 PIO caused by rate-limiting is considered. The result shows a large jump in limit cycle amplitude indicating a significant change in PVS structural stability. We also present results on PIO detection using subspace identification. Numerical results with linear airframe and rate saturating actuators show that this approach is feasible

Keywords

aircraft; bifurcation; identification; man-machine systems; oscillations; stability; aircraft; limit cycle; nonlinear global analysis; pilot-induced oscillations; pilot-vehicle system; structural stability; system identification; Aircraft; Bifurcation; Couplings; Fluid dynamics; Geometry; Limit-cycles; Nonlinear dynamical systems; Structural engineering; System identification; Vehicle dynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Applications, 1998. Proceedings of the 1998 IEEE International Conference on

Conference_Location

Trieste

Print_ISBN

0-7803-4104-X

Type

conf

DOI

10.1109/CCA.1998.721691

Filename

721691