预报误差法参数辨识-松弛的思想，FIR 底通和带通滤波器和IIR 底通和带通滤波器，利用最小二乘法进行拟合多元非线性方程。- Prediction Error Method for Parameter Identification- the idea of relaxation, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Multivariate least squares fit