Robust fixed structure output feedback flight control law synthesis and analysis using singular structured value

Authors: Daniel Siqueira, Pedro Paglione, Fernando J.O. Moreira

Abstract:
This work proposes a method to design a fixed structure output feedback flight control law, joining flying qualities criterion with robustness to structured and unstructured uncertainties in the design specifications. The contribution is a straightforward design method to find simple control laws that comply with these specifications, using the structured singular value formulation. The method is applied to a typical pitch axis control problem, and analyzed from the robust control theory standpoint and a flying qualities criterion as well. The results show that the control law designed considering the uncertainties can provide better performance robustness than the design for the nominal plant.

Keywords:
Robust control
Flight control
Structured uncertainty
Fixed structure
Output feedback

Published in: Aerospace Science and Technology  (Volumes 30, issue 1, October 2013)

Publisher: Elsevier

ISSN Information: 1270-9638

Robust fixed structure output feedback flight control law synthesis and analysis using singular structured value

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