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Design, analysis and implementation of fault-tolerant control systems with application to electric machines.

机译：容错控制系统的设计，分析和实现，并应用于电机。

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摘要

This thesis deals with the development of Fault-Tolerant Control Systems (FTCS). Fault-tolerant control systems are closed-loop control systems that can tolerate system component faults and maintain system stability and a certain degree of performance. They are used to enhance system reliability and are extremely important in safety-critical applications. In this thesis, the model of a system with possible component faults is first formulated mathematically. Definitions of hardware redundancy, analytical redundancy and hybrid redundancy are provided. The FTCS is classified into passive FTCS and active FTCS based on how the system utilizes the Fault Detection and Isolation (FDI) information. Existing design methods for both passive and active FTCS are reviewed, and new design methods for passive FTCS against sensor faults and active FTCS against actuator faults are proposed and verified on a lab-scale electric machine system. The test results demonstrate the effectiveness of the design. One of the important components in active FTCS is the FDI schemes that rely on so called residual signals. It is shown in this thesis that many of the existing FDI residual generation methods only work for open-loop systems or closed-loop systems without integral terms in its controller. A new method to generate the residual signal for closed-loop systems is proposed based on the results from the sensitivity analysis once the characteristics of a closed-loop control system are known. The original contributions of this thesis are: (i) to determine the limitations of the existing FDI schemes for closed-loop systems and to propose a new way to generate the FDI residual signal; (ii) to apply the FDI and FTCS theories to the design of a passive FTCS for a DC motor speed control system and an active FTCS for a synchronous generator excitation control system. The proposed design methods can readily be extended to other applications.
机译：本文主要研究容错控制系统（FTCS）的发展。容错控制系统是闭环控制系统，可以容忍系统组件故障并保持系统稳定性和一定程度的性能。它们用于增强系统可靠性，并且在安全关键型应用中极为重要。本文首先对可能存在组件故障的系统进行数学建模。提供了硬件冗余，分析冗余和混合冗余的定义。根据系统如何利用故障检测和隔离（FDI）信息，将FTCS分为被动FTCS和主动FTCS。回顾了现有的无源和有源FTCS设计方法，提出了针对传感器故障的无源FTCS和针对执行器故障的有源FTCS的新设计方法，并在实验室规模的电机系统上进行了验证。测试结果证明了设计的有效性。有源FTCS的重要组成部分之一是FDI方案，它依赖于所谓的残留信号。本文证明，许多现有的FDI残差生成方法仅适用于开环系统或闭环系统，而其控制器中没有积分项。一旦知道了闭环控制系统的特性，就可以基于灵敏度分析的结果，提出一种为闭环系统生成残差信号的新方法。本论文的主要贡献是：（i）确定现有FDI方案对闭环系统的局限性，并提出一种产生FDI残余信号的新方法； （ii）将FDI和FTCS理论应用于直流电动机速度控制系统的无源FTCS和同步发电机励磁控制系统的有源FTCS的设计。所提出的设计方法可以容易地扩展到其他应用。

著录项

  • 作者

    Xu, Yonghui.;

  • 作者单位

    The University of Western Ontario (Canada).;

  • 授予单位 The University of Western Ontario (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 184 p.
  • 总页数 184
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

  • 入库时间 2022-08-17 11:43:26

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