旋转机械二维全息谱计算，多元数据分析的主分量分析投影，对信号进行频谱分析及滤波，各种kalman滤波器的设计，是小学期课程设计的题目。- Rotating machinery 2-d holographic spectrum calculation, Principal component analysis of multivariate data analysis projection, The signal spectral analysis and filtering, Various k