摘要
介绍了三阶累积量和1(1/2)维谱定义及估计算法。1(1/2)维谱可以抑制高斯噪声,保留信号的相位信息,而功率谱不能保留相位信息,但可以利用1(1/2)维谱识别二次相位耦合现象。仿真信号和齿轮振动信号验证了1(1/2)维谱检验二次相位耦合的有效性,可以用来识别出故障齿轮。
The definitions and the estimation algorithm of the 1 (1/2) dimension spectrum and the high- order cumulation are introduced. The 1 (1/2) dimension spectrum can suppress the Ganssian noise and hold the phase information while the power spectrum can' t hold the phase information, so it is useful to identify the case of square phase - coupled. The square phase - coupled signal and the bearing fault signal are used to verify the validity of the method, so fault gear can be detected in this way.
出处
《煤矿机械》
北大核心
2007年第1期175-177,共3页
Coal Mine Machinery
基金
湖北省自然科学基金项目(2005ABA287)
关键词
二次相位耦合
1(1/2)维谱
功率谱
故障诊断
square phase-couple
1 (1/2) dimension spectrum
power spectrum
fault diagnosis