DocumentCode :
1407139
Title :
Non-iterative identification and model following control of hammerstein systems with asymmetric dead-zone non-linearities
Author :
Lv, Xin ; Ren, Xuemei
Author_Institution :
Sch. of Autom., Beijing Inst. of Technol., Beijing, China
Volume :
6
Issue :
1
fYear :
2012
Firstpage :
84
Lastpage :
89
Abstract :
A novel non-iterative identification algorithm based on the parameterisation of unknown dead-zone non-linearity is proposed for control of Hammerstein systems in presence of asymmetric dead-zone input. A canonical representation for piecewise linear functions is employed to describe the dead-zone function such that a universal-type parametric model can be established to approximate the entire system. Both the dead-zone parameters (thresholds and slopes) and the coefficients in linear transfer function can be estimated simultaneously using the designed persistent exciting input. A modified model following control scheme is then designed in such a way that the plant output tracks the desired output with satisfactory performance. This method can be applied without a priori knowledge of the dead-zone non-linearity. Numerical simulations are presented to illustrate the effectiveness of the proposed scheme.
Keywords :
cascade control; control nonlinearities; identification; nonlinear control systems; numerical analysis; piecewise linear techniques; transfer functions; Hammerstein system control; asymmetric dead zone input; canonical representation; dead zone function; linear transfer function; noniterative identification algorithm; numerical simulation; parameterisation; persistent exciting input; piecewise linear functions; plant output; universal type parametric model; unknown dead zone nonlinearity;
fLanguage :
English
Journal_Title :
Control Theory & Applications, IET
Publisher :
iet
ISSN :
1751-8644
Type :
jour
DOI :
10.1049/iet-cta.2010.0454
Filename :
6111727
Link To Document :
بازگشت