對于pH 中和過程的控制，由于其本身具有嚴(yán)重的非線性特性，因而對于此過程的控制十分困難。鑒于此，本文提出了Hammerstein 系統(tǒng)非線性預(yù)測控制方法，并應(yīng)用仿真和試驗(yàn)的方法分別實(shí)現(xiàn)了對pH 中和非線性過程的控制。研究結(jié)果表明，Hammerstein 模型非線性預(yù)測控制具有良好的控制效果和很強(qiáng)的穩(wěn)定性，且優(yōu)于常用的PID 控制方法。
關(guān)鍵詞：Hammerstein 模型；非線性控制；預(yù)測控制；pH 中和；仿真；試驗(yàn)
Abstract: The control of pH neutralization process, having highly nonlinear nature, can be very difficult to achieve. In this paper, a predictive control strategy based on the Hammerstein model is put forward, which is known as Nonlinear Predictive Control of Hammerstein models, and achieved control of pH neutralization process. Simulation and test study for a pH neutralization process indicate that predictive control based on Hammerstein models can provide much better control performance than well-tuned PID controllers.
key words: Hammerstein Models; Nonlinear Control; Predictive Control; pH Neutralization Process; Simulation; Test