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相位测试是开展切削振动诊断工作的关键。本文从理论上论证了可以利用互谱密度函数和传递函数所包含的相位讯息对被测颤振信号作互谱密度函数分析或“传递函数”分析,来测量颤振信号在主振频率上的相位差。实验结果表明,本文提出的相位测试方法是切实可行的。
Phase testing is the key to diagnosis of cutting vibration. In this paper, we theoretically demonstrate that the cross-spectral density function and the phase information contained in the transfer function can be used to measure the dither signal at the main frequency by using the cross-spectral density function analysis or the “transfer function” analysis of the measured dither signal Phase difference. Experimental results show that the proposed phase test method is feasible.