Novel fault positioning method

Abstract

The invention belongs to a fault diagnosis technology, and relates to a novel fault positioning method. The novel fault positioning method comprises the following steps of: firstly, dividing a system into parts, determining a characteristic value of each part, and establishing an expert database; secondly, obtaining a real-time characteristic value of each part by using a sensor, a test channel and a computer; thirdly, querying the expert database to obtain theoretical criteria by using the computer, and generating actual criteria by combining the accuracy of test equipment; and finally, determining the working state of each part, and displaying. By the method, a system fault can be dynamically tracked, intelligently positioned and processed by the expert database serving as a background, the operation threshold can be reduced, and a large amount of labor cost is saved; and the method is easy to use and high in popularization and application value.

Description

technical field [0001] The invention belongs to fault diagnosis technology and relates to a novel fault location method. Background technique [0002] Aircraft is a complex comprehensive system, involving dozens of professional fields and tens of thousands of parts and components. Under such a complex system, it is a waste of resources to rely on manpower to troubleshoot and locate faults. [0003] The United States and other western countries began to study fault diagnosis technology as early as the 1950s. With the development of computer technology, the current fault diagnosis system has developed from the original single fault diagnosis expert system of each subsystem to an integrated health management (IVHM) system integrating system status monitoring, fault diagnosis and fault repair. [0004] At present, in the full-scale test of the aircraft fuel system, if a failure occurs, the engineering experience of experts is often used to conduct on-site investigations. If it ...

AI Technical Summary

Problems solved by technology

[0004] At present, in the full-scale test of the aircraft fuel system, if a fault occurs, the engineering experience of experts is often used to conduct on-site investigations. If it is an occasional fault, it is necessary to repeat the test to reproduce the fault before troubleshooting, which is time-consuming and laborious, and the effect cannot be guaranteed.

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