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http://dx.doi.org/10.5302/J.ICROS.2004.10.12.1280

Sequential Loop Closing Identification of Hammerstein Models for Multiple-Input Multiple-Output Processes  

Park Ho Cheol (경북대학교 화학공학과)
Koo Doe Gyoon (현대 엔지니어링 공정안전부)
Lee Moon Yong (영남대학교 응용화학공학부)
Lee Jietae (경북대학교 화학공학과)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.10, no.12, 2004 , pp. 1280-1286 More about this Journal
Abstract
A lot of industrial chemical processes contain certain input nonlinearities even though they are controlled by several linear controllers. Here we investigate a sequential loop closing identification method for MIMO Hammerstein nonlinear processes with diagonal nonlinearities. The proposed method separates the identification of the nonlinear static function from that of the linear subsystem by using a relay feedback test and a triangular type signal test. From 2 n activations for n n MIMO nonlinear processes, we sequentially identify the whole range of the nonlinear static function as well as the transfer function matrix of the linear subsystem.
Keywords
biased relay; diagonal nonlinearity; nonlinear static function; hammerstein nonlinear process; sequential loop closing;
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