Method for separating vibration signals of planetary gears of main reducer of helicopter

Abstract

The invention provides a method for separating vibration signals of planetary gears of a main reducer of a helicopter, belonging to vibration signal processing for a helicopter. The method includes the steps: obtaining position parameters of an acceleration sensor and position parameters of planetary gears; determining a meshing timing sequence of a separation angle matrix and the planetary gears;acquiring original vibration signals of a plurality of vibration sensors, and according to a cycle period of a planet carrier, segmenting and resampling the plurality of original vibration signals toobtain a plurality of planet carrier periodic signals; performing windowing on the plurality of planet carrier periodic signals to obtain vibration signals of the plurality of planetary gear teeth; and splicing the vibration signals to obtain a planetary gear reconstruction vibration signal. The method for separating vibration signals of planetary gears of a main reducer of a helicopter can extract the signals of the single planetary gear from the vibration signals of the complex planetary transmission system, and can separate the gear signals of each planetary gear, so as to lay the foundation for fault diagnosis of the planetary gears.

Description

technical field [0001] The application belongs to the field of helicopter fault signal processing, and in particular relates to a vibration signal separation method of a planetary gear of a helicopter main reducer. Background technique [0002] The main reducer of the helicopter has the power input end of the engine and the power output end connected with the rotor and the tail rotor accessory drive shaft. [0003] The main reducer of the helicopter contains planetary gears, and the vibration of the planetary gears will have a great impact on the main reducer. Therefore, health monitoring, fault diagnosis and prediction are usually performed on key components such as gearboxes, rotors and engines. [0004] At present, the fault diagnosis of planetary gear train mainly adopts spectral analysis method, time-frequency analysis method and particle filter method, but in these methods, the planetary gear train is basically regarded as a whole, and the fault characteristic frequen...

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Problems solved by technology

[0004] At present, the fault diagnosis of planetary gear train mainly adopts spectral analysis method, time-frequency analysis method and particle filter method. , or reflect the health status of the planetary gear train through other characteristic indicators, without going deep into each component, it is still unable to effectively solve the problem of mutual submersion of signal components in practice

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