Study On Fault Diagnosis Technology Of Aeronautics Electronic Equipment

The electronic equipment fault diagnosis technology is a developing and crossing discipline. It is one of the focus problems of academic circles. With development of electronic technology, computer technology and artificial intelligence, the electronic equipment fault diagnosis technology will get some new pulse. Some new method of electronic equipment fault diagnosis based knowledge is studied in this paper. Two aspect research work and results is found in the paper, one is the theory and application of fault tree analysis for the electronic equipment fault diagnosis, other is the theory and application of multi-sensors information fusion technology.In chapter 1: the basic concepts of fault diagnosis of equipment are introduced, the fault diagnosis methods based knowledge are analyzed, the basic principle and application of electronic equipment fault diagnosis are generalized.In chapter 2:. firstly the basic principle of fault tree analysis is introduced; Secondly the qualitative analysis method of fault tree is discussed exhaustively; finally the quantitative analysis method of fault tree is discussed.In chapter 3: the basic principle of electronic equipment (36E) of photovoltaic Radar and hardware of its fault diagnosis system are introduced firstly. The measurement and diagnosis of whole 36E and electronic equipment are discussed detailed secondly; Finally the software of fault diagnosis is introduced briefly.In the chapter the technology of fault tree analysis is used in fault diagnosis of electronic equipment (36E) of photovoltaic Radar at first, and it shown that fault tree analysis is practical and effective.In chapter 4, firstly the basic principle of information fusion is introduced, the relation of information fusion and fault diagnosis is analyzed; Some information fusion algorithms of fault diagnosis are discussed detailed secondly; The information fusion algorithms of electronic equipment is discussed finally.In the chapter the technology of information fusion is used in electronic circuit fault at first, the membership function and fault determinant rule based on experiment are presented. The experiment research of neural network information fusion fault diagnosis of simple signal amplify circuit is presented. It is shown that the uncertain of analog circuit fault diagnosis was solved fairly from fusion result.In chapter 5, The application method of information fusion in real electronic equipment fault diagnosis is explored for AD change circuit board of 36E.In the fault information testing, not only electronic signal is used, but also the temperature signal of fault component is tested. It is shown that fault component is found accurately by D-S fusion result when testing component is appropriate and key signal is accurate, and it shown that fusion fault diagnosis of real electronic equipment is practical and effective.