鲁棒性好，性能优越，计算加权加速度,已调制信号计算其普相关密度，表示出两帧图像间各个像素点的相对情况，可以得到很精确的幅值、频率、相位估计，三相光伏逆变并网的仿真。- Robustness, superior performance, Weighted acceleration, Modulated signals to calculate its density Pu-related, Between two images showing the relative circumstances