A Fault Diagnosis Method for Vibration Test of Aeroengine

Abstract

The invention provides an aero engine vibration test fault diagnosis device and a diagnosis method, and relates to the technical field of aero engine structural component vibration test. The device includes a power supply, a power switch, a resistance characteristic fault diagnosis module, and a capacitance characteristic fault diagnosis module. The invention also provides the diagnosis method ofan aero engine vibration test fault. The diagnosis method adopts the resistance characteristic fault diagnosis module to realize fault diagnosis for a magnetoelectric speed sensor at the front end ofa vibration test system and adopts the capacitance characteristic fault diagnosis module to realize the fault diagnosis for a piezoelectric vibration acceleration sensor at the front end of the vibration test system. The aero engine vibration test fault diagnosis device provided by the invention uses a digital logic judgment circuit board to solidify the flow of clearing faults in a circuit system, thereby improving existing low-noise and low-accuracy fault clearing methods by means of replacing a low noise cable, saving a lot of platform occupying time, and improving the confidence level of fault diagnosis.

Description

technical field [0001] The invention relates to the technical field of vibration testing of aero-engine structural parts, in particular to a method for diagnosing faults in vibration testing of aero-engines. Background technique [0002] During the operation of the aero-engine, it is necessary to use the vibration test system to monitor the vibration characteristics of the aero-engine to ensure the reliability of the engine. Therefore, as the core component of the vibration test system-the goodness of the vibration sensor's operating status is the focus of attention. Vibration sensors used in existing engines are divided into resistive vibration sensors and capacitive vibration sensors. At present, the judgment of the failure of the engine vibration test system is mainly based on manual inspection of the vibration sensor, using a voltmeter to check the sensor line or an electromagnetic vibration table to excite the sensor to judge whether the response output meets the requir...

AI Technical Summary

Problems solved by technology

These operations are relatively complicated and require professional and technical personnel to judge the results, which are inefficient and time-consuming.

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