Order Tracking of Run-up Signals of Hoist Gearbox Based on Instantaneous Frequency Estimation
A new method combining Empirical Mode Decomposition(EMD) with time-frequency ridge is proposed to estimate the Instantaneous Frequency(IF).In this paper, the EMD method was used to decompose the vibration signal, then the time-frequency spectrum of each Intrinsic Mode Function(IMF) derived based on the EMD was reassigned with the technology of time-frequency reassignment to improve its time-frequency sharpness.Consequently, the ridge of time-frequency reassignment was extracted to obtain the IF estimation.Thus, the shortcoming of noise sensitivity of Hilbert Transform was overcome.The comparison analysis shows that with the ridge extraction of time-frequency reassignment, a precise IF estimation can be gained to realize the order tracking of the run-up signals and the fault diagnosis of hoist gearbox.
Instantaneous Frequency Order Tracking Gearbox Time-Frequency Ridge
Li Zhan-fang Xiao Xing-ming
College of Applied Science and Technology; College of Mechanical and Electrical Engineering China University of Mining and Technology, Xuzhou, 221008
国内会议
芜湖
英文
263-269
2010-05-21（万方平台首次上网日期，不代表论文的发表时间）