基于空间采样法的齿轮调相振动信号解调

在对机械设备的齿轮部件进行振动监测时,由于载荷以及转速波动等因素的影响,会引起振动信号的相位调制,使得频谱严重失真.通过对调相现象的理论分析和数值仿真计算,提出了基于空间采样的齿轮振动调相信号的解调方法,结果表明,该方法可以获得有价值的振动信号,从而进行有效的齿轮故障诊断.

A demodulation method of gear phase modulation vibration signal based on spatial sampling

Owing to the fluctuation of the load and the rotational speedof a machine, the vibration signals of the gear should be modulated in phase, and the characteristic frequency spectrums which contain the fault information of the gear are changed and even distorted. So it is very difficult to diagnosegear fault with vibration signal.Thus, how to obtain the valuableinformation from the vibration signal becomesa very important problem inpractice. In this paper, through the theoretical (analysis)and numerical simulation ofthe demodulation for the phasemodulation signals, a demodulation method of gear phase modulation vibration signal based on spatial samplingis presented. It is effective to implement the signal demodulation and fault diagnosis.