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Sensor Fault Tolerant Control of a Fast Steering Mirror System Using Adaptive PI-Based Sliding Mode Observer and Hardware Redundancy

机译：基于自适应PI滑模观测器和硬件冗余的快速转向镜系统传感器容错控制

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摘要

The aim of this paper is to present a sensor fault-tolerant control (FTC) scheme for a two-axis fast steering mirror (FSM) system with minimum power consumption and without changing the controller structure. In this paper, an adaptive PI-based sliding mode observer (APISMO) is adopted firstly to estimate the fault signal, which does not require any prior knowledge of the fault. The estimation is then used by the fault isolation logic to identify the fault. The redundant sensor would be powered up to replace the faulty one when faults occur. During the backup sensor booting up, for maintaining the normal performance of the closed-loop system approximately, a fault-free estimation of the position provided by the APISMO is used as feedback signal. Experimental studies on a prototype system show that the proposed APISMO can effectively reconstruct the fault signals even when the two primary position sensors are faulty simultaneously. Meanwhile, the effectiveness and performance of the proposed scheme have been verified.
机译：本文的目的是提出一种用于两轴快速转向镜（FSM）系统的传感器容错控制（FTC）方案，该方案具有最小的功耗且无需更改控制器结构。在本文中，首先采用基于PI的自适应滑模观测器（APISMO）估计故障信号，不需要对故障有任何先验知识。然后，故障隔离逻辑使用该估计来识别故障。发生故障时，冗余传感器将通电以替换故障传感器。在备用传感器启动期间，为了大致保持闭环系统的正常性能，将APISMO提供的位置的无故障估算用作反馈信号。在原型系统上进行的实验研究表明，即使两个主要位置传感器同时发生故障，所提出的APISMO也可以有效地重建故障信号。同时，验证了该方案的有效性和性能。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第9期|918456.1-918456.14|共14页
  • 作者

    Wang Hongju; Bao Qiliang; Yang Wenshu; Liu Zidong; Tian Jing;

  • 作者单位

    Univ Chinese Acad Sci, Beijing 100191, Peoples R China.;

    Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China.;

    Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China.;

    Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China.;

    Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China.;

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