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Open Access

Adaptive Prescribed Performance Control for Flexible Spacecraft with Input Saturation and Actuator Misalignment

Department of Automation, Tsinghua University, Beijing 100084, China.
Department of Strategic Missile and Underwater Weapon, Naval Submarine Academy, Qingdao 266071, China.
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Abstract

In this paper, a flexible spacecraft attitude control scheme that guarantees vibration suppression and prescribed performance on transient-state behavior is proposed. Here, parametric uncertainty, external disturbance, unmeasured elastic vibration, actuator saturation, and even configuration misalignment are considered. To guarantee prescribed performance bounds on the transient- and steady-state control errors, a performance constrained control law is formulated with an error transformed function. An elastic modal observer is employed to estimate the unmeasured flexible modal variables, and a command filter is adopted to avoid the tedious analytical computations of time derivatives of virtual control inherent in the control design. Subsequently, a novel auxiliary system is developed to compensate the adverse effects of the actuator saturation constraints, and a compensation term is integrated into the control law to tackle the configuration misalignment. A comparative simulation study is carried out to illustrate the effectiveness and advantages of the proposed approach.

Keywords

flexible spacecraftmodal observervibration suppressionprescribed performanceinput saturationactuator misalignment

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Tsinghua Science and Technology
Volume 24 Issue 6,
December 2019
Pages 694-705
DOI: 10.26599/TST.2018.9010094
Cite this article:
Tao J, Zhang T, Nie Y. Adaptive Prescribed Performance Control for Flexible Spacecraft with Input Saturation and Actuator Misalignment. Tsinghua Science and Technology, 2019, 24(6): 694-705. https://doi.org/10.26599/TST.2018.9010094

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Received: 11 February 2018
Revised: 18 April 2018
Accepted: 19 April 2018
Published: 05 December 2019
© The author(s) 2019
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