摘要
针对多变量耦合系统参数辨识,在传统最小二乘法基础上,提出了一种带遗忘因子交替广义最小二乘法,该方法结合了递推最小二乘法与广义最小二乘法的优点,既能够实现无偏估计,计算又得到简化。该方法通过在线系统辨识,能够快速跟踪系统时变参数,可以获得高精度参数估计。最后通过d SPACE公司DS1103搭建了一个两入两出的水箱耦合系统,实验结果表明该系统辨识方法的有效性和可靠性。
According to the traditional least squares methods, this paper proposed a system parame- ter identification strategy for multivariable coupling system based on alternative generalized least squares method with forgetting factor. The proposed method combines both advantages of recursive least-squares method and generalized least-squares method, which could realize unbiased estimation and simplification of computation. Through online system identification, this method can quickly track time varying parameters of system and acquire estimation of parameters with high precision. Finally, by testing in a water tank coupling system with two inputs and two outputs based on DS1103 of dSPACE company, the testing results illustrate the validity and reliability of the proposed system identification strategy.
作者
焦慧方
陈希亮
高敏
马忠玲
JIAO Huifang1a, CHEN Xiliang2, GAO Min3 ,MA Zhongling1b(1. a. Institute for Advanced Study in History of Science, b. Continuing Education Institute Northwest University, Northwest University, Xi＇an 710127, Shaanxi, China; 2. School of Electrical Engineering, Xi＇an Jiaotong University, Xi＇an 710049, Shaanxi, China; 3.Northwest Industries Group Co., Ltd., Xi＇an 710043, Shaanxi, Chin)
出处
《咸阳师范学院学报》
2018年第2期49-53,共5页
Journal of Xianyang Normal University
关键词
系统辨识
最小二乘法
遗忘因子
多变量耦合系统
system identification
least square method
forgetting factor
multivariable coupling system
