Fault Diagnosis Method Based on Testability Model of Electronic Equipment

Abstract

The invention relates to a fault diagnosis method based on a testability model of electronic equipment, which is applicable to on-site fault diagnosis of all electronic equipment and belongs to the technical field of measurement and control. The technical point of this method is to establish the corresponding relationship among equipment failure modes, signals and tests based on the testability model of electronic equipment. , automatically reasoning and performing corresponding tests on the diagnosis node, according to the current test results, before the next step of test diagnosis, the test process is optimized to realize the dynamic fault diagnosis logic. The technical effect of the present invention is that it fundamentally overcomes the difficulties and high cost of manual troubleshooting, and the binary tree troubleshooting has poor flexibility, versatility, and scalability, and can realize automatic and intelligent on-site fault diagnosis of electronic equipment.

Description

technical field [0001] The invention relates to a fault diagnosis method based on a testability model of electronic equipment, which is suitable for on-site fault diagnosis of all electronic equipment and belongs to the technical field of measurement and control. Background technique [0002] With the continuous improvement of the technical level of electronic equipment, under the premise of meeting the requirements of function and performance indicators, the testability has also been highly valued. The integrity of the functional performance of electronic equipment directly affects the completion of the task of the platform. Rapid diagnosis and isolation is particularly important. [0003] At present, electronic equipment mainly adopts the rule-based on-site fault diagnosis mode, usually in the following two ways: [0004] 1. According to the fault phenomena (symptoms) displayed by the equipment, compare the "Maintenance and Troubleshooting Manual" provided by the equipmen...

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Problems solved by technology

[0006] It is concluded that the current on-site fault diagnosis of electronic equipment has the following defects: ① manual troubleshooting is complicated and costly, and is not suitable for maintenance support; ② "Maintenance and Troubleshooting Manual" only lists the known common Faults, there are no targeted and effective diagnostic methods and steps for unknown faults; ③The reasoning method of fault diagnosis in the form of binary tree is not flexible. Once the binary tree is edited, the fault diagnosis logic is fixed, and the diagnosis and troubleshooting process cannot change with the fault However, it changes dynamically; ④ poor versatility and expandability, with the finalization of the equipment, the fault diagnosis logic of the binary tree is fixed. After the equipment is upgraded, the original binary tree needs to be recompiled, and the workload is heavy; Great for complex cross-link failures

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