To better screen the fault features of the original high-dimensional vibration signals and improve the accu-racy of rolling bearings fault diagnosis,a fault feature selection method based on weighted optimization of feature e-valuation metrics was proposed.The smoothness priors approach was adaptively used to decompose the non-station-ary vibration signals,and the various time-domain,frequency-domain and time-frequency domain features were ex-tracted to construct an initial fault feature set.Then,four feature performance evaluation indexes of monotonicity,discrimination,identification and robustness were integrated,and a weighted linear combination based on the sine-cosine optimization algorithm was used to comprehensively evaluate the fault features performance,followed by the screening of sensitive fault features.The proposed method was applied to rolling bearings experimental data,and the support vector classifier was used as the diagnostic machine to verify the effectiveness of the proposed fault feature selection method.
关键词
滚动轴承/故障诊断/故障特征选择/故障特征评价
Key words
rolling bearings/fault diagnosis/fault feature selection/fault feature evaluation
维普
万方数据