Continuous Sliding Mode Controller with Disturbance Observer for Hypersonic Vehicles |
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| Authors: | Chaoxu Mu Qun Zong Bailing Tian Wei Xu |
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| Affiliation: | 1. Department of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China;2. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | In this paper, a continuous sliding mode controller with disturbance observer is proposed for the tracking control of hypersonic vehicles to suppress the chattering. The finite time disturbance observer is involved to make that the continuous sliding mode controller has the property of disturbance rejection. Due to continuous terms replacing the discontinuous term of traditional sliding mode control, switching modes of velocity and altitude firstly arrive at small regions with respect to disturbance observation errors. Switching modes keep zero and velocity and altitude asymptotically converge to their reference commands after disturbance observation errors disappear. Simulation results have proved the proposed method can guarantee the tracking of velocity and altitude with continuous sliding mode control laws, and also has the fast convergence rate and robustness. |
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| Keywords: | Sliding mode control finite time disturbance observer chattering suppression robustness hypersonic vehicles |
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