Quasi-continuous high-order sliding mode controller design for reusable launch vehicles in reentry phase

Authors: Bailing Tian, Qun Zong, Jie Wang, Fang Wang

Abstract:
A nonlinear robust control strategy is developed for Six-Degree-of-Freedom (6DOF) Reusable Launch Vehicles (RLV) which is nonlinear, multivariable, strong coupling, and includes uncertain parameters and external disturbances. Firstly, a reentry guidance law is designed to generate feasible guidance commands which are then tracked by second-order sliding mode attitude controller designed based on quasicontinuous high-order sliding mode theory. Furthermore, in order to reduce control chattering, the virtual control is introduced into the design of third-order sliding mode attitude controller which achieves higher tracking accuracy and less control chattering. Finally, 6DOF integrated guidance and control simulation results for X-33 vehicle are presented to demonstrate the effectiveness of the proposed control strategy in tracking the guidance commands as well as achieving safe and stable reentry flight.

Keywords:
Reusable launch vehicles
Quasi-continuous high-order sliding mode
Integrated guidance and control

Published in: Aerospace Science and Technology  (Volumes 28, Issue 1, July 2013)

Publisher: Elsevier

ISSN Information: 1270-9638

Quasi-continuous high-order sliding mode controller design for reusable launch vehicles in reentry phase

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