MIIT Key Laboratory of Dynamics and Control of Complex Systems;
Northwestern Polytechnical University;
Xi’an 710072;
China;
School of Mechanical and Electrical Engineering;
University of Electronic Science and Technology of China;
Chengdu 611731;
China;
Department of Mechanical Engineering;
University of Manitoba;
Winnipeg R3T 5V6;
Canada;
local; mean; decomposition(LMD); signal; processing; gear; rotor; bearing;