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基于扩展滤波器的非线性系统迭代学习故障诊断算法

DOI: 10.13195/j.kzyjc.2014.0512, PP. 1027-1032

Keywords: 非线性系统,系统扩展,故障诊断滤波器,虚拟故障,迭代学习

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Abstract:

针对一类存在执行器和传感器故障的非线性系统,提出基于滤波器的故障重构方法.为了使算法同时适用于状态和输出端,通过由系统方程构造新状态方程对系统作扩展变换,将原系统输出端非线性和故障转换到扩展系统的状态方程,在此基础上设计故障诊断滤波器,采用迭代学习调节算法更新虚拟故障使之逼近实际故障.该算法可以检测和估计系统故障,并且对不同类型故障具有一定的适应性.在单关节机器人模型上进行仿真实验,实验结果验证了所提出算法的可行性和有效性.

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