【作者】 张博； 窦丽华； 马韬；

【Author】 ZHANG Bo,DOU Lihua,MA Tao School of Automation,Beijing Institute of Technology,Beijing 100081,P.R.China

【机构】 北京理工大学自动化学院；

【摘要】 针对液压系统中的潜在故障,利用Petri网方法对系统动态行为建模.将潜在故障描述为Petri网中的不可观测变迁,然后构造诊断器并提出一种诊断算法,使故障诊断问题转化为求解线性方程组,通过观测到的变迁激发判定潜在故障是否确定发生.最后以实际液压系统中活塞漏油故障为例,论证了此方法的有效性和可行性.更多还原

【Abstract】 Petri net is applied to potential fault diagnosis and modeling the dynamic behavior of hydraulic systems.The potential fault in hydraulic systems is described as unobservable transition in Petri nets.Consequentlya diagnoser is constructed and an algorithm is presented.The problem of fault diagnosis is transformed into solving linear equation and fault can be diagnosed through the firing of observable transitions.An example of actual hydraulic system is proposed to illustrate the validity and the feasibility of this method.更多还原