Research and Application of Hierarchical Diagnosis Model Based on Parameter Estimation
Xingwei Jiang · Jisuanji fangzhen · 2006
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.