动态系统故障机理的混杂特征及其建模方法

项目名称： 动态系统故障机理的混杂特征及其建模方法

项目编号： No.61304218

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 自动化技术、计算机技术

项目作者： 郭健彬

作者单位： 北京航空航天大学

项目金额： 22万元

中文摘要： 动态系统的故障机理具有明显的混杂特性，其故障演化过程受到内外因素、单元故障及其耦合作用的综合影响。首先，以典型动态系统为研究对象，从离散事件、连续参数及其耦合作用对动态系统故障的耦合影响入手，形成对动态系统故障机理混杂特征较为完整的认识。然后，结合可靠性领域特点提出随机混杂Petri网方法，集成离散事件模型和连续动态模型，通过动态变迁机制（瞬时变迁、线性变迁、积分变迁）描述模型间的动态交互，并在此基础上研究随机性因素注入方法，通过仿真输出各种可能的故障演化路径。最后，提出一种能处理随机性跳变的自适应步长模型驱动算法，实现对随机故障事件的敏感检测和精确定位，在保证不发生事件漏检的前提下提高仿真效率。混杂故障机理及其建模方法可为动态系统科学的开展故障原因分析、可靠性定量设计和故障诊断奠定基础。

中文关键词： 系统可靠性；故障机理；混杂系统；可靠性仿真；动态可靠性

英文摘要： Failure mechanisms of the dynamic system manifest typical hybrid characteristic for the reason that its failure process is comprehensively influenced by the internal and external factors, component failures and the coupling among them. By taking the typical dynamic system as the research object, firstly, a full understanding on the hybrid characteristic of failure mechanisms of the dynamic system is obtained through the coupled impact of the discrete events, continuous parameters and coupling among them on the dynamic system. Secondly, the stochastic hybrid Petri net method is developed considering the features of the reliability discipline to construct the hybrid failure mechanism model for dynamic systems. In the proposed method, the discrete event model and the continuous dynamic model are integrated and the dynamic interaction between them is described by the dynamic transition mechanisms (immediate transition, linear transition and integral transition). Then random factors injecting method is promoted to obtain all the revolution paths by simulation. Lastly, an adaptive step model driving algorithm is proposed to deal with the random jump, as well as to realize the sensitive detection and precise positioning of the deterministic events and random events. And the efficiency of the simulation would be improv

英文关键词： system reliability；failure mechanism；hybrid system；reliability simulation；dynamic reliability