Output Error Identification of Closed-loop Hammerstein Systems

被引：0
|
作者：
Han, Younghee [1 ]
de Callafon, Raymond A. [1 ]
机构：
[1] Univ Calif San Diego, La Jolla, CA 92093 USA
来源：
2011 50TH IEEE CONFERENCE ON DECISION AND CONTROL AND EUROPEAN CONTROL CONFERENCE (CDC-ECC) | 2011年
关键词：
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A feedback connection of a Hammerstein system and a linear controller provides a good approach to modeling systems with static actuator nonlinearity or input saturation during closed-loop experiments. This paper discusses the Output Error (OE) identification of such closed-loop Hammerstein systems that requires a nonlinear optimization due to the non-convexity of the output error. An iterative IV (Instrumental Variables) identification algorithm is proposed for the nonlinear optimization. The basic idea is to express the nonlinear parameter estimation as an iterative IV estimation using gradient based updates. The proposed iterative IV identification method is applied to the simulation data from a Hammerstein system with input static nonlinearity. The simulation study shows the effectiveness of the proposed identification algorithms.
引用
收藏
页码：5774 / 5779
页数：6
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