Antiwindup Terminal Sliding Mode Control for Mars Entry Using Supertwisting Sliding Mode Disturbance Observer
Publication: Journal of Aerospace Engineering
Volume 31, Issue 5
Abstract
Uncertainty and external disturbance during the Mars entry process inevitably degrade the performance of Mars entry guidance and control algorithms. Traditional approaches focus on suppressing disturbances and compensating uncertainties, which usually results in larger control responses beyond the limited control capability of a Mars entry vehicle. This paper further takes the limited actuator ability into consideration and proposes the Mars entry robust attitude control strategy using the terminal sliding mode control (TSMC) with antiwindup (AW) and a supertwisting sliding mode disturbance observer (SMDO). First, terminal sliding mode control with antiwindup is developed to robustly track the nominal attitude command under uncertainty and limited control capability. Then, the supertwisting sliding mode disturbance observer is introduced to online estimate the disturbances and further enhance the attitude control accuracy and robustness. Finally, the comparison simulation results illustrate that the proposed control strategy not only performs well in tracking the reference commands even in the presence of uncertain disturbance, but also avoids the control saturation issue.
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Acknowledgments
The work described in this paper was supported by the National Natural Science Foundation of China (Grant Nos. 11672126 and 61273051); the Opening Grant from the Key Laboratory of Space Utilization, Chinese Academy of Sciences (LSU-2016-07-01); funding of the Jiangsu Innovation Program for Graduate Education (Grant No. KYZZ16_0170); the Fundamental Research Funds for the Central Universities; and funding for the Outstanding Doctoral Dissertation in NUAA (Grant No. BCXJ16-10). The authors fully appreciate their financial support. The first author also would like to acknowledge the financial support provided by the China Scholarship Council for his study at the University of Arizona (Grant No. 201706830055).
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Published In
Journal of Aerospace Engineering
Volume 31 • Issue 5 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jul 24, 2017
Accepted: Jan 16, 2018
Published online: May 18, 2018
Published in print: Sep 1, 2018
Discussion open until: Oct 18, 2018
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