Adaptive extended-state observer-based fault tolerant attitude control for spacecraft with reaction wheels

作者：Ran, Dechao; Chen, Xiaoqian^*; de Ruiter, Anton; Xiao, Bing

来源：Acta Astronautica, 2018, 145: 501-514.

DOI：10.1016/j.actaastro.2018.01.021

• Attitude maneuver
• Finite-time convergence
• Second-order sliding mode
• Fault tolerant control
• Adaptive-gain observer

This study presents an adaptive second-order sliding control scheme to solve the attitude fault tolerant control problem of spacecraft subject to system uncertainties, external disturbances and reaction wheel faults. A novel fast terminal sliding mode is preliminarily designed to guarantee that finite-time convergence of the attitude errors can be achieved globally. Based on this novel sliding mode, an adaptive second-order observer is then designed to reconstruct the system uncertainties and the actuator faults. One feature of the proposed observer is that the design of the observer does not necessitate any priori information of the upper bounds of the system uncertainties and the actuator faults. In view of the reconstructed information supplied by the designed observer, a second order sliding mode controller is developed to accomplish attitude maneuvers with great robustness and precise tracking accuracy. Theoretical stability analysis proves that the designed fault tolerant control scheme can achieve finite-time stability of the closed-loop system, even in the presence of reaction wheel faults and system uncertainties. Numerical simulations are also presented to demonstrate the effectiveness and superiority of the proposed control scheme over existing methodologies.

• 出版日期2018-4
• 单位渤海大学; 中国人民解放军国防科学技术大学; 中国人民解放军军事医学科学院