Instantaneous Frequency Estimation Based on Adaptive Window and Compressive Amplitude
Aiming at the problem that the time-frequency distribution of the bearing signal under the condition of variable rotation speed is difficult to obtain due to the energy divergence,strong noise and harmonic interference,an instantaneous frequency estimation method based on adaptive window and compressive amplitude is proposed.Firstly,the ridge window is searched in the frequency axis direction through the adaptive window to avoid the interference of noise and harmonics.Secondly,the divergent ridge energy is concentrated in the ridge window using the compressed amplitude method.Then,the ridge line is extracted by the penalty function method to achieve accurate estimation of the transponder frequency.Finally,the effectiveness and robustness of the proposed method are verified by using the data collected from the bearing test bench.The results show that,compared with the traditional method,the error value of the instantaneous rotational frequency estimated by the proposed method is reduced by about 8%.
fault diagnosisridge line extractionrolling bearingvariable speedadaptive windowfrequency estimationcompressive amplitude
万方数据
维普
