Identification and nonlinear model predictive control of MIMO Hammerstein system with constraints
Da-zi Li , Yuan-xin Jia , Quan-shan Li , Qi-bing Jin
Journal of Central South University ›› 2017, Vol. 24 ›› Issue (2) : 448 -458.
This work is concerned with identification and nonlinear predictive control method for MIMO Hammerstein systems with constraints. Firstly, an identification method based on steady-state responses and sub-model method is introduced to MIMO Hammerstein system. A modified version of artificial bee colony algorithm is proposed to improve the prediction ability of Hammerstein model. Next, a computationally efficient nonlinear model predictive control algorithm (MGPC) is developed to deal with constrained problem of MIMO system. The identification process and performance of MGPC are shown. Numerical results about a polymerization reactor validate the effectiveness of the proposed method and the comparisons show that MGPC has a better performance than QDMC and basic GPC.
model predictive control / system identification / constrained systems / Hammerstein model / polymerization reactor / artificial bee colony algorithm
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