Identification and control of Hammerstein-type nonlinear process

This work presents a novel means of identification and control Hammerstein- type nonlinear process data from a relay feedback experiment. The static no nlinearity part of the proposed model is represented by an invertible funct ion defined on an operation range. Parameters in this function are determin ed by means of a simple optimization procedure which aims to obtain a symme tric cycling instrumental output. Based on the instrumental output, a simpl e transfer function of linear subsystem is determined. The linear subsystem of the model is represented in FOPDT or SOPDT form. Notably, identificatio n of the linear and nonlinear parts is fully decoupled. Finally, control of such process using the identified model is presented.