控制理论与应用
控製理論與應用
공제이론여응용
CONTROL THEORY & APPLICATIONS
2005年
4期
609-614
,共6页
离散事件系统%故障诊断%Petri网%赋时事件图%极大代数
離散事件繫統%故障診斷%Petri網%賦時事件圖%極大代數
리산사건계통%고장진단%Petri망%부시사건도%겁대대수
discrete event systems%fault diagnosis%Petri net%timed event graph%max-plus algebra
赋时事件图(TEG)是一类用于描述同步特性的重要的Petri网.本文提出并研究了基于赋时事件图的故障诊断问题.文中定义了两类系统故障类型:变迁失效(Invalidation)故障和变迁时间延迟(Time-lag)故障.基于事件图关联矩阵,通过研究变迁失效故障的可观测传播特性,引入了故障特征向量的概念.基于此,给出了失效故障的可诊断性的充分必要条件.对于时延故障,提出了一种基于变迁触发时间估计进行故障诊断的简单算法.并基于此算法,研究了时延故障的可诊断条件.
賦時事件圖(TEG)是一類用于描述同步特性的重要的Petri網.本文提齣併研究瞭基于賦時事件圖的故障診斷問題.文中定義瞭兩類繫統故障類型:變遷失效(Invalidation)故障和變遷時間延遲(Time-lag)故障.基于事件圖關聯矩陣,通過研究變遷失效故障的可觀測傳播特性,引入瞭故障特徵嚮量的概唸.基于此,給齣瞭失效故障的可診斷性的充分必要條件.對于時延故障,提齣瞭一種基于變遷觸髮時間估計進行故障診斷的簡單算法.併基于此算法,研究瞭時延故障的可診斷條件.
부시사건도(TEG)시일류용우묘술동보특성적중요적Petri망.본문제출병연구료기우부시사건도적고장진단문제.문중정의료량류계통고장류형:변천실효(Invalidation)고장화변천시간연지(Time-lag)고장.기우사건도관련구진,통과연구변천실효고장적가관측전파특성,인입료고장특정향량적개념.기우차,급출료실효고장적가진단성적충분필요조건.대우시연고장,제출료일충기우변천촉발시간고계진행고장진단적간단산법.병기우차산법,연구료시연고장적가진단조건.
Timed event graphs (TEG) are an important subclass of Petri nets that are well adapted to model synchronizations. The problem of fault diagnosis for timed event graph is studied in this paper. Two different system faults are defined, transition invalidation fault and transition time-lag fault. The observable propagating path of invalidation fault is studied based on the relevance matrix of event graph, and fault character vector is firstly introduced to mark the propagating character of transition invalidation fault. Based on that, a sufficient and necessary condition of diagnosability for invalidation fault is given. For the time-lag fault, a simple fault diagnosis algorithm based on transition firing time estimation is given. Finally, the diagnosable condition is studied.
