基于径向基函数的非线性系统近似偏最小一乘准则辨识算法

徐宝昌; 张华; 王金山

doi:10.11949/j.issn.0438-1157.20180857

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基于径向基函数的非线性系统近似偏最小一乘准则辨识算法

过程系统工程 | 更新时间：2026-07-24

- 基于径向基函数的非线性系统近似偏最小一乘准则辨识算法
- Partial approximate least absolute deviation for nonlinear system identification based on radial basis function
- 化工学报 2019年70卷第2期页码：653-660
- 作者机构：
  
  1.中国石油大学（北京）自动化系，北京 102249
  2.中国石油塔里木油田分公司库车油气开发部，新疆库尔勒 841000
- 作者简介：
  
  徐宝昌（1974—），男，博士，副教授，xbcyl@163.com
- 基金信息：
  
  国家重点研发计划项目(2016YFC0303700)
- DOI：10.11949/j.issn.0438-1157.20180857
  中图分类号： TP 273
- 收稿：2018-07-25，
  
  修回：2018-10-19，
  
  网络首发：2020-06-16，
  
  纸质出版：2019-02-05
- 稿件说明：
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徐宝昌, 张华, 王金山. 基于径向基函数的非线性系统近似偏最小一乘准则辨识算法[J]. 化工学报, 2019, 70(2): 653-660

XU Baochang, ZHANG Hua, WANG Jinshan. Partial approximate least absolute deviation for nonlinear system identification based on radial basis function[J]. CIESC Journal, 2019, 70(2): 653-660
徐宝昌, 张华, 王金山. 基于径向基函数的非线性系统近似偏最小一乘准则辨识算法[J]. 化工学报, 2019, 70(2): 653-660 DOI： 10.11949/j.issn.0438-1157.20180857.

XU Baochang, ZHANG Hua, WANG Jinshan. Partial approximate least absolute deviation for nonlinear system identification based on radial basis function[J]. CIESC Journal, 2019, 70(2): 653-660 DOI： 10.11949/j.issn.0438-1157.20180857.

摘要

针对输入信号非线性相关的非线性系统，提出了基于径向基函数的近似偏最小一乘准则辨识算法。首先对观测数据矩阵进行列扩展，以径向基函数（radial basis function，RBF）网络的输出作为观测数据矩阵的扩展项，然后利用近似偏最小一乘算法对扩展的观测矩阵和输出矩阵进行线性回归。近似偏最小一乘算法用确定性可导函数近似代替残差绝对值，可以抑制对称

稳定（symmetrical alpha stable，SαS）分布的尖峰噪声。同时，通过主成分分析去除非线性系统数据向量矩阵之间的非线性相关，得出模型参数的唯一解。仿真实验表明，本文算法可以对输入信号存在非线性相关的非线性系统进行直接辨识，抑制了尖峰噪声对辨识结果的影响，具有优良的稳健性。

Abstract

For nonlinear system with nonlinear correlation of input signals

a partial approximate least absolute deviation based on radial basis function is proposed. In this paper

the observation data matrix is first extended by columns

and the output of the RBF network is used as an extension of the observed data matrix. Then

the extended observation data matrix and the output matrix are linearly regressed by using the partial approximate least absolute deviation. An approximate least absolute deviation objective function is established by introducing a deterministic function to replace the absolute value under certain situations. The proposed method can overcome the disadvantage of large square residual of least square criterion when the identification data is disturbed by the impulse noise which obeys symmetrical alpha stable (SαS) distribution. By adopting principal component analysis to eliminate the nonlinear correlation among the elements of data vector of nonlinear systems

the unique solution of model parameters can be easily acquired by the proposed method. The simulation experiments show that the proposed algorithm can directly recognize the nonlinear system with nonlinear correlation of input signals and suppress the influence of impulse noise.

关键词

Keywords

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