【作者】 付丽荣；

【导师】 罗跃生；

【作者基本信息】 哈尔滨工程大学 ， 系统理论， 2011， 硕士

【摘要】 随着现代控制系统的规模和复杂度的不断增加,现代工业过程对系统安全性、可靠性的需求也日益提高。故障诊断技术可为复杂系统的安全性和可靠性提供保障,因此其研究具有重要的理论意义和广泛的应用价值。本文在第一章介绍了故障检测与诊断技术的研究背景和发展现状。介绍了现有的一些故障检测与诊断方法,讨论了这些方法的基本思想和特点。在第二章中介绍了线性矩阵不等式、Lyapunov稳定性及控制器设计的相关基础知识。第三章和第四章是本文的主要研究工作,也是主要创新之处,其主要内容如下：首先,针对一类简单的线性非时变系统,提出了传感器和执行器的故障诊断方法。利用线性系统理论和矩阵理论的相关知识,对系统可能的故障情况作出详细的分析；通过系统的实际输出值和理论输出值作比较的方法来确定系统的故障原因。并且通过数值算例验证了该方法的有效性。其次,研究基于观测器的故障检测与诊断方法。介绍了传感器、执行器和状态的故障模型；针对具有精确数学模型的线性非时变系统,分别给出了单输出系统和多输出系统的故障检测观测器的设计方法；提出了基于观测器的故障诊断方法。最后通过数值算例,说明了该方法的有效性。最后,对全文所作的工作进行了总结,并展望了故障诊断技术进一步的研究方向。更多还原

【Abstract】 Due to modem control systems are tended to be huger and more complex, the demand for high reliability and safety in modem industry increase rapidly. Fault diagnosis technology provides security for the reliability and safety of complex system. Hence, research on fault diagnosis is of important theoretic sense and wide applications.In Chapter 1 we introduce the research background and the latest development of fault detection and diagnosis technology. We introduce some existing fault detection and diagnosis methods, and discuss the basic idea and features of these methods; in Chapter 2 we introduce the relevant basic knowledge of linear matrix inequality, the Lyapunov stability and the controller design; Chapter 3 and Chapter 4 are the main research work of this paper and also are where the innovation lies, they can be summarized as follows:Firstly, to a kind of simple linear time-invariant system, a new fault diagnosis method based on sensors and actuators are proposed in the thesis. By using the relevant knowledge of linear system theory and matrix theory, the system possible fault cases are made detailed analysis; compare the actual output value with the theory output value of system, we determine to the system fault causes. And the approaches discussed in this chapter are demonstrated to be affective through numerical examples.Secondly, a new fault detection and diagnosis method based on observer are proposed in the thesis. We introduce fault model of sensors, actuators and state; to linear time-invariant system with accurate mathematical model, fault detection observer of single output system and multiple output system are proposed respectively. A new fault diagnosis method based on observer is proposed. Finally, the methods discussed in this chapter are demonstrated to be affective through numerical examples.Finally, the tasks in the paper are summarized, and next research direction of fault diagnosis is pointed out.更多还原