故障诊断, 啮合频率, 线调频小波路径追踪算法, 阶比分析

A method for the fault diagnosis of gearboxes with rotating speed fluctuation based on SVD and chirplet path pursuit algorithm was proposed herein.In this method, the vibration signals were decomposed into signal components by SVD method, and a reconstructed signal which was the first component with the largest value was obtained. The gear meshing frequency was estimated by processing the reconstructed signals with the chirplet path pursuit algorithm, then dividing the gear’s meshing frequency by the number of gear teeth and the gear rotational speed signals can be obtained. Finally, according to the extracted rotational speed signals,the vibration signals were resampled

at constant angle increments, and the gearbox fault diagnosis was accomplished by the order analysis of the resampled signals. Practical application examples confirm the validity and the superiority of the proposed method.