This brief examines the problem of attitude tracking control with prescribed performance guarantees for a spacecraft subjected to actuator faults and input saturation. To pursue this, the open-loop tracking error dynamics with certain designer-specified performance constraints is first transformed into an equivalent “state-constrained” one, via an error transformation; furthermore, the resulting dynamics is augmented with a dynamic system, which is tactfully constructed to ensure that the control input satisfies the magnitude limits. Subsequently, a robust fault-tolerant controller is developed by using a low-pass filter and an auxiliary system in conjunction with adaptive backstepping design. It is shown that the control algorithm developed not only achieves the stable attitude tracking with prescribed behavioral metrics but also guarantees the boundedness of all the closed-loop signals. Finally, simulation results are given to evaluate the efficacy of the proposed scheme.

中文翻译：

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输入饱和下航天器的容错规定性能姿态跟踪控制

本摘要探讨了在执行器故障和输入饱和的情况下，具有规定性能保证的航天器姿态跟踪控制的问题。为此，首先通过误差转换将具有某些设计者指定的性能约束的开环跟踪误差动态转换为等效的“受状态约束”。此外，动态系统还增强了动态效果，该系统经过巧妙设计，可确保控制输入满足幅度限制。随后，结合自适应反推设计，通过使用低通滤波器和辅助系统来开发鲁棒的容错控制器。结果表明，所开发的控制算法不仅可以实现具有规定行为指标的稳定姿态跟踪，而且可以保证所有闭环信号的有界性。最后，通过仿真结果评估了该方案的有效性。