TCAS system fault comprehensive diagnosis method and system based on Bayesian decision tree

Abstract

The invention discloses a TCAS system fault comprehensive diagnosis method based on a Bayesian decision tree. The TCAS system fault comprehensive diagnosis method comprises the following steps that firstly, the fault decision tree is used for decomposing airplane electronic system faults, and a measuring method is provided; secondly, according to requirements of a measured or controlled object, parameter information such as a voltage, a current, frequency, a harmonic wave and resistance are collected, and analog-to-digital conversion is carried out; thirdly, feature extraction is carried out on the voltage, the current and the frequency, and state information of devices is obtained according to measurement of extracted power source quality features or the voltage or the resistance; fourthly, the faults of each device are judged with a statistics-based Bayesian decision method; fifthly, the object-oriented decision tree is applied to inference of fault locations, the faults are removed one by one, and fault positioning is carried out; sixthly, a detection result is output. Possible hidden dangers of an airplane can be detected while the faults are removed, and a TCAS electronic system fault diagnosis system with an industrial control computer serving as a host computer is achieved.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of aircraft avionics systems, in particular to a comprehensive fault diagnosis method for TCAS systems based on a Bayesian decision tree. Background technique [0002] TCAS system is an important airborne electronic device of modern aircraft, and its complex system cross-linking and internal structure put forward high requirements for system maintenance and troubleshooting. The TCAS system has high requirements on the sensitivity and accuracy of the signal. A large amount of data calculation is the basis for providing high-precision electronic identification. Coupled with the complex and harsh electromagnetic environment on board, the failure rate of the TCAS system on various types of aircraft is relatively low. high case. Therefore, its troubleshooting is also a relatively complicated process. Through the analysis of its common failures, there are generally power failures, line failures and comp...

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Problems solved by technology

[0003] The traditional fault diagnosis method mainly relies on the traditional manual fault diagnosis method, which is difficult to meet the requirements

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