| 基于综合观测器的执行器过程故障量精确诊断 |
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| 引用本文： | 岑朝辉,魏蛟龙,蒋睿,严涛.基于综合观测器的执行器过程故障量精确诊断[J].宇航学报,2011,32(6). |
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| 作者姓名： | 岑朝辉 魏蛟龙 蒋睿 严涛 |
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| 作者单位： | 华中科技大学电子与信息工程系,武汉,430074 |
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| 摘 要： | 执行器的非线性与输出不可得在一般复杂动力学系统中具有典型性,而其过程故障量的精确诊断是个前沿难点问题.针对该问题,研究一种面向控制系统和执行器的综合观测器方法.提出一种适用于带有非线性执行器复杂系统的新型自适应观测器方法,可克服输出量不可直接获得的条件限制,实现故障诊断并获得执行器真实输出估计;基于执行器输出估计与控制器输出量,采用扩张状态观测器实现过程故障量精确估计,从而为主动容错故障调节提供诊断依据.以卫星姿态控制系统飞轮摩擦力矩增大这一典型非线性执行器故障的过程故障量精确诊断为应用实例验证了本文方案的有效性及优越性.
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| 关 键 词： | 过程故障量 非线性执行器 观测器 故障诊断 卫星姿态控制系统 |
Accurate Diagnosis on Process Fault Parameters of Nonlinear Actuator Based on Adaptive Observer and Extended State Observer |
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| CEN Zhao-hui,WEI Jiao-long,JIANG Rui,YAN Tao.Accurate Diagnosis on Process Fault Parameters of Nonlinear Actuator Based on Adaptive Observer and Extended State Observer[J].Journal of Astronautics,2011,32(6). |
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| Authors: | CEN Zhao-hui WEI Jiao-long JIANG Rui YAN Tao |
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| Institution: | CEN Zhao-hui,WEI Jiao-long,JIANG Rui,YAN Tao(Department of Electronics and Information Engineering,Huazhong University of Science and Technology,Wuhan 430074,China) |
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| Abstract: | As an important component of a dynamics system,the actuator is generally nonlinear and its output is immeasurable.It is a challenging problem for diagnosing and estimating process fault parameters of nonlinear actuator.Aimed at this problem,a joint observer method is proposed to observe control system and actuator.A novel nonlinear adaptive observer(NAO) is first proposed to estimate the actuator output of the dynamics system with nonlinear actuator and diagnosis fault.The output estimate and control input ... |
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| Keywords: | Process fault parameter Nonlinear actuator Observer Fault diagnosis(FD) SACS |
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