关键词: 传递函数, 参数估计, 迭代算法, 正交最小二乘法

Abstract:

Since Levy Method simplifies the index function and applies the classical least squares approach, for the parameters used to estimate the system transfer function, the estimation precision is seriously affected by the error in the experimental data. Based on the Levy method but keeping the index function in its original form, this paper presents an improved incremental iterative algorithm and an orthogonal least squares approach. The simulation results show that the above algorithm has rather good convergence and the estimation precision of parameters is much improved compared with the Levy method.

Key words: transfer function, parameter estimation, iterative algorithm, orthogonal least squares approach