An Electromagnetic Compatibility Fault Diagnosis and Analysis Method Based on Dynamic Fault Tree

Abstract

The invention relates to an electromagnetic compatibility fault diagnosis analysis method based on a dynamic fault tree. The method is characterized by at least comprising the following steps of step101.analyzing components and characteristics of a system; dividing all electronic equipment in the system into wireless frequency equipment, general wired information equipment and driving execution equipment according to the performance characteristics; determining the electromagnetic emission characteristics and the electromagnetic sensitivity characteristics of the wireless frequency equipment,the general wired information equipment and the driving execution equipment to prepare for establishment of a dynamic fault tree model; step 102.establishing the dynamic fault tree model according toa result in the step 101; step 103.obtaining a real-time fault parameter and dynamically correcting a model parameter; and step 104.computing a minimum cutset interference probability and determininga fault source to complete diagnosis. According to the method, the two-way correction of the analysis model and the test data is realized, so that the positioning of a field interference source can be completed quickly and accurately, and a problem of fault diagnosis of field testing of electromagnetic compatibility of a complex system is solved.

Description

technical field [0001] The invention belongs to the field of system-level electromagnetic compatibility fault diagnosis, in particular to an electromagnetic compatibility fault diagnosis and analysis method based on a dynamic fault tree. Background technique [0002] With the development of electronic information technology, the number of electronic devices in electronic systems has increased sharply, and the types tend to be more complicated. The frequency band used by electronic equipment is developing from narrowband to broadband, and at the same time, electronic components on electronic equipment are also tending to be miniaturized. This has led to, on the one hand, the problem of electromagnetic interference generated by the power network, electrical equipment and systems is very prominent, and the electromagnetic environment in which the equipment is located is becoming more and more complex; on the one hand, the improvement of equipment precision is more sensitive to ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide an EMC fault diagnosis and analysis method based on a dynamic fault tree, so as to realize the two-way correction of the analysis model and test data, so as to quickly and accurately complete the on-site interference source location, and solve the problem of EMC on-site testing of complex systems Troubleshooting Problems

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