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Adaptive fault-tolerant control of spacecraft attitude dynamics with actuator failures

机译:具有执行器故障的航天器姿态动力学的自适应容错控制

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摘要

An actuator fault-tolerant attitude control was reported. Two kinds of spacecraft actuator failures were considered, a gain fault, and a deviation fault. An adaptive fault-tolerant control method was proposed for the spacecraft experiencing these actuator failures. The fault-tolerant control relies on an ideal reference model to identify when a fault occurs. The control tracks the ideal reference model to replicate it as closely as possible. This control employs adaptive parameters to improve the responsiveness of the angular velocity error and the quaternion error due to actuator faults. Moreover, the angular velocity error magnitude is more sensitive than the quaternion error to an actuator fault. This adaptive control has been shown to significantly improve the performance over a conventional control in the presence of these actuator faults.
机译:报告了执行器的容错姿态控制。考虑了两种航天器执行器故障:增益故障和偏差故障。提出了一种针对执行器故障的航天器的自适应容错控制方法。容错控制依赖于理想的参考模型来识别何时发生故障。控件会跟踪理想参考模型以尽可能地复制它。该控制采用自适应参数来改善由于执行器故障而引起的角速度误差和四元数误差的响应度。而且,角速度误差幅度比四元数误差对致动器故障更敏感。在存在这些致动器故障的情况下,这种自适应控制已显示出比常规控制明显改善的性能。

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