Aiming at the decomposed components’ number k and the penalty parameter α in the method of variational mode decomposition (VMD) being difficult to determine, an improved VMD method, based on the firefly algorithm (FA) and the principle mode analysis (PMD), named the method of FA-PMA-VMD was proposed. Firstly, the new method used PMA to sort band- limited intrinsic mode function (BIMF) components obtained with VMD. Then, FA was used to search the optimal influence parameter combination k and α in VMD with a new proposed orthogonal low peak value taken as the objective of FA, the optimal combination of k and α was gained. Finally, a signal was decomposed into k BIMF components adaptively with FA-PMA-VMD according to the preset fault characteristic parameters. The analysis results of simulated signals and actual fault signals of gear tooth root cracks showed that the proposed method of FA-PMA-VMD has a good decomposition effect.
程军圣 李梦君 欧龙辉 杨宇. FA-PMA-VMD方法及其在齿根裂纹故障诊断中的应用[J]. 振动与冲击, 2018, 37(15): 27-32.
CHENG Junsheng, LI Mengjun, OU Longhui, YANG Yu. FA-PMA-VMD method and its application in gear tooth root crack fault diagnosis. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(15): 27-32.
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