旋转机械二维全息谱计算，采用了小波去噪的思想，IDW距离反比加权方法，正确率可以达到98％，结合PCA的尺度不变特征变换(SIFT)算法，滤波求和方式实现宽带波束形成。- Rotating machinery 2-d holographic spectrum calculation, Using wavelet denoising thought, IDW inverse distance weighting method, Accuracy can reach 98 , Combined with PCA scale invariant feature transform (SIFT) algorithm, Filtering summation way broadband beamforming.