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		Xiaohua Lü,Xuemei REN.[en_title][J].Control Theory and Technology,2012,10(4):511~516.[Copy]

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XiaohuaLü,XuemeiREN
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(School of Automation, Beijing Institute of Technology)

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Received:July 26, 2010Revised:May 17, 2011

基金项目:This work was supported by the National Natural Science Foundation of China (Nos. 60974046, 61011130163).

Identification of Hammerstein systems with asymmetric dead-zone nonlinearities using canonical parameterized model

Xiaohua Lü,Xuemei REN

(School of Automation, Beijing Institute of Technology)

Abstract:

A non-iterative identification method with parameterization of the unknown dead-zone is proposed for Hammerstein systems in presence of asymmetric dead-zone nonlinearities. The canonical parameterized model which is a single expression without segmentation is utilized to describe the dead-zone, based on which a universal-type parametric model can be established to approximate the entire system. This model can be established without separating the nonlinear part from the linear part. The dead-zone parameters and the coefficients in the linear transfer function can be estimated simultaneously according to the proposed algorithm. Numerical experiments are presented to illustrate the effectiveness of the proposed scheme.

Key words: Hammerstein systems Asymmetric dead-zone nonlinearity Canonical parameterized model System identification