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Constrained predictive control based on T-S fuzzy model for nonlinear systems

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3 Author(s)
Su Baili ; Dept. of Automation, Nankai Univ., Tianjin 300071, P. R. China; Qufu Normal Univ., Qufu 273165, P. R. China ; Chen Zengqiang ; Yuan Zhuzhi

A constrained generalized predictive control (GPC) algorithm based on the T-S fuzzy model is presented for the nonlinear system. First, a Takagi-Sugeno (T-S) fuzzy model based on the fuzzy cluster algorithm and the orthogonal least square method is constructed to approach the nonlinear system. Since its consequence is linear, it can divide the nonlinear system into a number of linear or nearly linear subsystems. For this T-S fuzzy model, a GPC algorithm with input constraints is presented. This strategy takes into account all the constraints of the control signal and its increment, and does not require the calculation of the Diophantine equations. So it needs only a small computer memory and the computational speed is high. The simulation results show a good performance for the nonlinear systems.

Published in:

Journal of Systems Engineering and Electronics  (Volume:18 ,  Issue: 1 )