Sliding Mode Control Based on High-Order Linear Extended State Observer for Near Space Vehicle

Aiming at the uncertainty and external disturbance sensitivity of the near space vehicles (NSV), a novel sliding mode controller based on the high-order linear extended state observer (LESO) is designed in this paper. In the proposed sliding mode controller, the double power reaching law is adopted...

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Bibliographic Details
Published in:International journal of aerospace engineering 2021-02, Vol.2021, p.1-19
Main Authors: Li, Ouxun, Jiang, Ju, Deng, Li, Huang, Shutong
Format: Article
Language:English
Subjects:
Aerospace engineering
Aircraft
Compensation
Control theory
Controllers
Design techniques
Parameter uncertainty
Robust control
Sliding mode control
Space vehicles
State observers
Systems stability
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Summary:Aiming at the uncertainty and external disturbance sensitivity of the near space vehicles (NSV), a novel sliding mode controller based on the high-order linear extended state observer (LESO) is designed in this paper. In the proposed sliding mode controller, the double power reaching law is adopted to enhance the state convergence rate, and the high-order LESO is designed to improve the antidisturbance ability. Moreover, the appropriate observer bandwidth and extended order are selected to further reduce or even eliminate the disturbance by analyzing their influences on the observer performance. Finally, the simulation demonstrations are given for the NSV control system with uncertain parameters and external disturbances. The theoretical analyses and simulation results consistently indicate that the proposed high-order LESO with carefully selected extended order and observer bandwidth has better performance than the traditional ones for the nonlinear NSV system with parametric uncertainty and external disturbance.
ISSN:1687-5966
1687-5974
DOI:10.1155/2021/6657281