中文摘要：

针对Teager能量算子包络解调方法主要用于对单分量的调幅调频信号进行解调，而真实机械故障信号多为多分量的调幅调频信号的问题，提出了能量算子与固有时间尺度分解相结合的解调方法。首先，利用固有时间尺度分解法将原始振动信号分解为若干个固有旋转分量和一个单调趋势项，并基于波形匹配算法实现原始数据的自适应端点延拓以解决分解过程中的端点效应；然后再选取合适的固有旋转分量，利用能量算子方法实现调制信号的包络解调；最后，将该方法应用于仿真信号和故障模拟信号。结果表明：该方法能有效地提取机械振动信号的故障特征。．

英文摘要：

The envelope demodulation method based on Teager energy operator is mostly effective on single component AM-FM signal, but most of the real mechanical failure signals are multi-component AM-FM signal. Thus, a demodulation met.hod of combining the operator and the intrinsic time-scale decomposition （ITD） was proposed. Firstly, the signal was decomposed into several proper rotation components and a trend component by the ITD method. The self-adaptive end extension method based on waveform matching was applied to dealing with the end effect. Then, the energy operator method was used to demodulate the PRF which contained obvious impacts. The application of this method to the simulated signal and fault vibration signals led to the conclusion that the combination of Teage energy operator and ITD is a better method which can be used to extract the fault characteristics in the vibration signals.