School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China; Institute of Electric Vehicle Driving System and Safety Technology, University of Electronic Science and Technology of China, Chengdu, 611731, China.
ISA Trans. 2019 Nov;94:1-9. doi: 10.1016/j.isatra.2019.04.014. Epub 2019 Apr 25.
In this paper, the problem of fault-tolerant control (FTC) for spacecraft attitude stabilization system with actuator fault and mismatched disturbance is investigated. A novel fault tolerant control strategy based on adaptive fast terminal sliding mode control (AFTSMC) is proposed. Firstly, a novel composite observer is proposed to estimate the disturbance, actuator efficiency factor and partial states of the system. By introducing a sliding mode observer, the bias actuator fault is reconstructed. Subsequently, in accordance with the estimated information, a novel sliding mode fault tolerant controller is designed. The proposed control scheme contains two compensators and two adaptive parameters to attenuate the mismatched disturbance, to compensate actuator fault, and to guarantee fast convergence of the system. Furthermore, the reachability of sliding motion is proved. The simulation results for the spacecraft system illustrate the effectiveness of the proposed method.
本文针对具有执行器故障和不匹配干扰的航天器姿态稳定系统的容错控制（FTC）问题进行了研究。提出了一种基于自适应快速终端滑模控制（AFTSMC）的新型容错控制策略。首先，提出了一种新的复合观测器来估计系统的干扰、执行器效率因子和部分状态。通过引入滑模观测器，重构了偏差执行器故障。随后，根据估计信息，设计了一种新的滑模容错控制器。所提出的控制方案包含两个补偿器和两个自适应参数，以衰减不匹配的干扰、补偿执行器故障，并保证系统的快速收敛。此外，还证明了滑动运动的可达性。针对航天器系统进行的仿真结果验证了所提出方法的有效性。
