Helicopter moving part vibration signal data quality calculation method

A vibration signal and data quality technology, applied in aircraft component testing, machine/structural component testing, calculations, etc., can solve problems such as the inability to evaluate the accuracy of test results, and the increase in the number of dynamic balance adjustments of the main rotor and tail rotor. Improve troubleshooting efficiency, prolong engine life, and reduce the number of starts
CN112556930AActive Publication Date: 2021-03-26中国人民解放军32382部队
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中国人民解放军32382部队
Publication Date
2021-03-26

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Abstract

The invention provides a helicopter moving part vibration signal data quality calculation method, and the method comprises the following steps: A, setting vibration sampling frequency and sampling time, and synchronously acquiring a vibration signal and a rotating speed signal; B, averagely dividing the vibration signal and the rotating speed signal into n sections, intercepting each section of vibration signal according to the synchronous rotating speed signal, and carrying out time domain average processing; C, performing FFT conversion on the n time domain synchronous average signals in sequence, and extracting amplitudes and phases of the n rotating speed same-frequency vibration signals; D, eliminating abnormal values of the amplitudes of the n rotating speed same-frequency vibrationsignals by utilizing a 3[delta] rule; E, calculating dynamic balance data quality according to the maximum value and the minimum value of the amplitude of the residual rotating speed same-frequency vibration signals; and F, if the mass of the dynamic balance data is smaller than the mass of the dynamic balance data, calculating the average value of amplitudes and phases of residual rotating speedsame-frequency vibration signals, otherwise, returning to the step A. The accuracy of the helicopter dynamic balance test result can be effectively improved, and the number of times of field dynamic balance adjustment is reduced.
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Description

technical field

[0001] The invention relates to the field of helicopter vibration health monitoring, in particular to a method for calculating the quality of vibration test signal data of a helicopter rotor system and transmission system. Background technique

[0002] Helicopter moving parts mainly include main rotor, tail rotor, reducer, engine, transmission system, etc. The structural damage of various moving parts will directly and seriously affect the flight safety of the helicopter. Therefore, it is very important to monitor and evaluate the structural health of helicopter moving parts. significance. Structural damage or abnormality of helicopter moving parts generally manifests as abnormal vibration of each moving part of the helicopter. Vibration monitoring can accurately evaluate the health of moving parts.

[0003] The balance test of helicopter moving parts mainly uses the simultaneous measurement of the speed signal and the vibration signal, and performs time-dom...

Claims

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