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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Fault diagnosis and fault-tolerant control for sampled-data attitude control systems: an indirect approach
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Fault diagnosis and fault-tolerant control for sampled-data attitude control systems: an indirect approach

机译：采样数据姿态控制系统的故障诊断和容错控制：一种间接方法

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摘要

This article proposes an indirect approach for fault diagnosis and fault-tolerant control in the satellite attitude control system with sampled-data measurements. The proposed method is based on a discrete-time approximation model of the continuous attitude dynamics. By considering the fault term as an auxiliary state vector, an augmented plant is constructed. Then an observer is designed to simultaneously estimate the system state vector and the fault term. Specifically, the observer design problem is reformulated as a set of linear matrix inequalities and can be conveniently solved by standard linear matrix inequality tools. The fault-tolerant controller is easily derived using the fault diagnosis result and the H_∞ index is adopted to analyze the fault-tolerant control performance. Finally, numerical simulation results are given to demonstrate the effectiveness of the proposed method.
机译：本文提出了一种间接的卫星姿态控制系统中的故障诊断和容错控制方法。所提出的方法基于连续姿态动力学的离散时间近似模型。通过将故障项视为辅助状态向量，可以构建增强型植物。然后，设计一个观察器以同时估计系统状态向量和故障项。具体而言，将观察者设计问题重新表述为一组线性矩阵不等式，并且可以通过标准线性矩阵不等式工具方便地解决。利用故障诊断结果可以轻松得出容错控制器，并采用H_∞指标来分析容错控制性能。最后，数值仿真结果证明了该方法的有效性。

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