Study And Application On Case-Based Diagnosis Technique For Satellite

Case-Based Reasoning(CBR) is a recently developing technique of Artificial Intelligence, and it is active and effective in solving some problem. It's quite significant for pushing the development of the fault diagnosis technique to apply the technique in fault diagnosis field. The key techniques of case-based diagnosis such as case representation, Case-based diagnosis model, retrieve strategies of fault case, The main contents are in brief as following:The case representation and inference model have been investigated. The technology of Case-Based Reasoning(CBR) and the task plot of CBR are introduced . An object-oriented representation method of fault cases is proposed using object-oriented ideas. The hierarchy model of fault case has been built by using the concept of abstract cases. A diagnosis model based on case has been built according to the method that domain expert solve problems on the basis of the Case-based reasoning cycle.The retrieval strategies of fault cases are studied in the paper. The computing method of the similarity is studied on the base of fuzzy dissertation. The method of the retrieval strategies of parallel search is used in the searches mechanism of the fault case. The parallel search computing method based on the case has many kinds, The parallel fuzzy inference method is introduced in the paper. The nearest neighbor approach is studied in the third chapter. And as to similarity assessment of numerical features is difficult, an assessment method of similarity between numerical features is built on the basis of fuzzy dissertation . It is an important problem to determine the weights of the features for calculating similarity matching. This paper adopts a novel method to assign feature weights. A retrieval model based on nearest neighbor approach is built.In order to help the manager improve their level of the management and technology and lay a foundation for the practicality application of the fault diagnosis system based on CBR, The fault cases database is built. A software platform of fault diagnosis is built using component technique. According to the requirements of the real project, an on-line condition monitoring and fault diagnosis network system for TTï¹ C Equipment of the satellite is developed on -II-...