當(dāng)代電子信息技術(shù)的快速發(fā)展催生了很多規(guī)模龐大、功能復(fù)雜的系統(tǒng),如高速列車、運載火箭等。復(fù)雜系統(tǒng)常常由大量的子組件組成,這些組件按照特定的規(guī)則進(jìn)行信息傳輸和交換,大大增加了系統(tǒng)發(fā)生故障的風(fēng)險。故障是一種改變系統(tǒng)預(yù)期行為的事件,它使系統(tǒng)的性能和產(chǎn)量降低,甚至發(fā)生嚴(yán)重后果。最近幾十年,無論在學(xué)術(shù)界還是工業(yè)界,故障診斷都是一個活躍的研究領(lǐng)域。故障診斷的目的在于根據(jù)系統(tǒng)的輸出信息及時準(zhǔn)確地檢測故障的數(shù)量和位置,從而修復(fù)故障并恢復(fù)系統(tǒng)。故障診斷最直接的方式就是對系統(tǒng)各組件的參數(shù)進(jìn)行測量和統(tǒng)計,這種方式雖簡單易行,但只能應(yīng)用于已建成的系統(tǒng),不能為系統(tǒng)的設(shè)計和維護(hù)提供理論指導(dǎo)和定性分析。因此,學(xué)術(shù)界提出了許多系統(tǒng)化的基于數(shù)學(xué)模型的故障診斷方法,這些方法不但描述了故障檢測算法,并且提供了用來分析故障的各種理論工具。本論文使用故障Petri網(wǎng)（faulty Petri net）模型和無故障Petri網(wǎng)（fault-free Petri net）模型探討故障診斷問題。故障Petri網(wǎng)模型不但描述了系統(tǒng)的正常行為,而且包含了系統(tǒng)的各種故障行為。故障Petri網(wǎng)常�？梢越o出準(zhǔn)確的故障信息,但由于我們在建模時不得... 

【文章來源】：西安電子科技大學(xué)陜西省 211工程院校 教育部直屬院校

【文章頁數(shù)】：125 頁

【學(xué)位級別】：博士

【文章目錄】：
摘要
ABSTRACT
List of Symbols
List of Abbreviations
Chapter 1 Introduction
    1.1 Fault Diagnosis Based on Faulty Petri Nets
    1.2 Fault Diagnosis Based on Fault-Free Petri Nets
        1.2.1 Petri Net Identification
        1.2.2 Fault Identification
    1.3 Thesis Organization
Chapter 2 Preliminary
    2.1 Petri Nets
    2.2 Labeled Petri Nets
    2.3 Logical Constraints Transformation
Chapter 3 Fault Diagnosis of Labeled Petri Nets Using an Overall Fault Status
    3.1 Motivation
    3.2 Diagnosis Problem With an Overall Fault Status
    3.3 ILP-Based Solution
    3.4 Diagnosability and Overall Fault Status
    3.5 Case Study
    3.6 Conclusion
Chapter 4 Optimistic and Pessimistic Fault Diagnosis for Labeled Petri Nets
    4.1 Diagnosis-Function Approaches for Fault Diagnosis
    4.2 Optimistic and Pessimistic Diagnosis
    4.3 From Partially Labeled PNs to Labeled PNs
    4.4 Extension of Basis-Marking-Based Approach
        4.4.1 Conversion of a Pessimistic Approach to Optimistic Case
        4.4.2 Extension from Partially Labeled PNs to Labeled PNs
    4.5 Case Study
    4.6 Conclusion
Chapter 5 Fault Identification Using Partially Observed Petri Nets
    5.1 Motivation
    5.2 Basic Definitions
    5.3 Problem Statement
    5.4 Main Results
        5.4.1 Fault Identification
        5.4.2 Linear Representation of Constraints
        5.4.3 Complexity Analysis
        5.4.4 Acyclicity Assurance of the Solution
    5.5 Numerical Example
    5.6 Conclusion
Chapter 6 Fault Identification Using Fault-Free Petri Nets With Unobservable Transitions
    6.1 Position of the Chapter
    6.2 Basic Definitions
    6.3 Problem Statement
    6.4 Fault Identification
        6.4.1 Main Result
        6.4.2 Constraints Linearization
        6.4.3 Complexity Analysis
    6.5 Acyclicity Assurance of The Solution
    6.6 Numerical Example
        6.6.1 Case 1
        6.6.2 Case 2
    6.7 Conclusion
Chapter 7 Conclusions
Reference
Acknowledgement
Biography



本文編號：2895087