基于神经网络的pH中和过程非线性预测控制

doi:10.11949/j.issn.0438-1157.20181035

Abstract

Abstract:

To solve the control problems of nonlinear process systems, nonlinear model-predictive control algorithms are studied. pH neutralization process is a typical nonlinear process in chemical process systems. In view of the characteristic of pH neutralization process, the entire model of pH neutralization process system and the inverse model of static nonlinear block are established by neural networks. Then two novel nonlinear predictive control strategies are studied based on model-predictive control and Hammerstein model. The neural networks model predictive control (NNMPC), which is a global solution strategy for nonlinear predictive control systems and nonlinear Hammerstein model predictive control (NLHMPC), which is a strategy based on two steppes separation control are developed and simulated by MATLAB. Control simulation results show that the NNMPC and NLHMPC control strategies have better performances on set-point tracking and anti-interference control response than PID control. They can give effective control performance to nonlinear processes.

Key words: model-predictive control, neural networks, process control, Hammerstein model, pH neutralization process, nonlinear system

CLC Number:

TP 273

Zhizhen WANG, Zhiyun ZOU. Nonlinear predictive control strategies of pH neutralization process based on neural networks[J].CIESC Journal, 2019, 70(2): 678-686.

Figures/Tables 15

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Nonlinear predictive control strategies of pH neutralization process based on neural networks

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