2．互功率谱(cross power spectrum) ．互功率谱 信号x(n)、y(n)的互相关函数rxy(n)的傅利叶变换叫互功率谱(函数)，其离散 表示为: 一般情况下，互功率谱函数是复函...
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* CPSDxy 信号x(t)和y(t)的互功率谱（Cross Power Spectrum Density） * PSDx 信号x(t)的功率谱
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最大熵与互功率谱相位法就是首先求出组分波的波至点。
The arrival of components must been picked for the method of maximum entropy and cross power spectrum phase.
详细推导了多自由度结构多测点加速度响应的互功率谱模态矩阵展开式。
The modal matrix expansion of the cross power spectra of the multi-measurement acceleration response in the multi-DOF structure is derived in detail.
结果表明，利用等工件转角间隔采样通过互功率谱密度方法可以实现相位差的精确在线测试。
The results show that the phase shift angle can be measured accurately based on the cross-spectrum method with equivalent interval sampling of workpiece rotary angles.
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