Quasi-continuous high-order sliding mode controller and observer design for flexible hypersonic vehicle

Authors:  Qun Zong, Jie Wang, Bailing Tian, Yang Tao

Abstract:
The problem of robust output feedback control and simulation for the longitudinal model of a flexible airbreathing hypersonic vehicle (FAHV) is investigated in this paper. A control-oriented uncertainty model is established for the feedback linearization design, and the multi-input and multi-output (MIMO) quasicontinuous high-order sliding mode (HOSM) controller is formulated to track the responses of the vehicle to a step change in velocity and altitude based on full state feedback. In addition, a high order sliding mode observer is designed to estimate the angle of attack and the flight path angle, which are difficult to measure in a hypersonic flight. Furthermore, the combination of the HOSM controller and observer is proposed for vehicle model with partial state measurements. The simulation results are presented to verify the effectiveness of the proposed control strategy.

Keywords:
Flexible air-breathing hypersonic vehicle
Control-oriented model
High order sliding mode control
High order sliding mode observer
Output feedback control

Published in: Aerospace Science and Technology  (Volumes 27, Issue 1, June 2013)

Publisher: Elsevier

ISSN Information: 1270-9638

Quasi-continuous high-order sliding mode controller and observer design for flexible hypersonic vehicle

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