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首页> 外文期刊>American journal of applied sciences >Sliding Mode Observer-Based Fault Reconstruction for Uncertain Linear Systems
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Sliding Mode Observer-Based Fault Reconstruction for Uncertain Linear Systems

机译：不确定线性系统基于滑模观测器的故障重构

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摘要

Problem statement: Fault reconstruction scheme is different from the majority of Fault Detection and Isolation (FDI) methods described in the literature in sense that it not only detects and isolates the fault, but provides an estimate of the fault. This approach is very useful for incipient faults and slow drifts, which are very difficult to detect. This approach is very useful for Fault Tolerant Control (FTC) systems in the sense that instead of reconfiguration of the control system, the faulty sensors or actuators can be corrected and simple control method can still be effectively used. Motivated by these useful features of fault, we are interested in performing observer-based fault reconstruction scheme for uncertain linear systems. Approach: In this study we present a scheme to design robust sliding mode observer for linear systems where both faults and uncertainties were considered. The objective was to derive a sufficient condition using Linear Matrix Inequalities (LMIs) for the stability of observer. The so-called equivalent output error injection is discussed for fault reconstruction. Results: We get a simple sliding mode observer design for detection and reconstruction of faults for uncertain linear systems. Conclusion: With the real model of the seventh-order aircraft we show that the methods provided by present study have good performances.
机译：问题陈述：故障重建方案与文献中描述的大多数故障检测和隔离（FDI）方法不同，因为它不仅可以检测和隔离故障，而且可以提供故障估计。这种方法对于难以检测的初期故障和缓慢漂移非常有用。这种方法对于容错控制（FTC）系统非常有用，因为可以代替故障系统的重新配置，而可以纠正故障传感器或执行器，并且仍然可以有效地使用简单的控制方法。由于故障的这些有用功能，我们对不确定的线性系统执行基于观测器的故障重构方案感兴趣。方法：在这项研究中，我们提出了一个设计线性系统的鲁棒滑模观测器的方案，该模型同时考虑了故障和不确定性。目的是使用线性矩阵不等式（LMI）得出足够的条件，以提高观察者的稳定性。讨论了用于故障重建的所谓等效输出错误注入。结果：我们得到了一个简单的滑模观测器设计，用于检测和重构不确定线性系统的故障。结论：使用七阶飞机的真实模型，我们证明了本研究提供的方法具有良好的性能。

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