摘要
针对大型系统多故障诊断的复杂性,提出利用抽象技术建立的简化层次模型进行诊断。把抽象技术分为结构抽象和行为抽象,结构抽象建立在系统的描述方法之上,采用的行为抽象技术为Box-Jenkins建模方法(B-J法)的参数模型。介绍了层次模型的一种形式化方式-抽象树的建立方法。利用不同层次的参数模型参数值序列之间的变化关系并采用由上至下的分层诊断策略进行故障诊断。仿真实例的结果表明减少了计算量,提高了诊断效率。
Against the complexity of multiple faults diagnosis for the large-scale system, a simplified hierarchical model, which was established by the abstraction technique, was put forward to carry out diagnosis. The abstraction technique was divided into structural abstraction and behavior abstraction. The structural abstraction was based on method of system description. The parameter model of Box-Jenkins modeling method was used for behavior abstraction. The establishing method of abstraction tree, which is a formalization of hierarchical model, was introduced. The corresponding relationships of variable parameter between different hierarchical parameter models and the top-down hierarchical diagnosis strategy were utilized to fault diagnosis. The results of simulation show that computation amount is reduced and diagnosis efficiency is improved.
出处
《系统仿真学报》
EI
CAS
CSCD
北大核心
2006年第4期1078-1080,共3页
Journal of System Simulation
关键词
参数估计
故障诊断
抽象技术
层次模型
B-J模型
电源系统
parameter estimation
fault diagnosis
abstraction technique
hierarchical model
b-j＇s model
power system
