基于DMC的污水PH值控制仿真研究教程.docx

基于DMC的污水PH值控制仿真研究   PAGE \* MERGEFORMAT III 摘要 污水处理中的PH值控制具有非线性、时滞性、不确定性的特点，这使得PH值控制成为污水处理中的一项难题。动态矩阵控制算法是基于阶跃响应模型的一种预测控制算法，能够有效规避PH中和反应过程中非线性、时滞性等影响，从而实现对污水处理中PH值的有效控制，这对于工业生产、环境保护等无疑具有巨大的现实意义。本文在总结人前研究的基础上，应用动态矩阵控制方法对污水PH值控制过程进行仿真实验，以验证动态矩阵控制方法的优势所在。研究主要针对污水处理中的酸碱中和反应过程，利用MATLAB的Simulink对PH中和反应过程控制进行仿真实验。仿真结果显示，动态矩阵控制算法对PH中和反应过程的控制性能显著优于PID算法，从整个控制的过程来看，动态矩阵控制无需离线辨识，在参数调整上较为容易，具有良好的收敛性和姣好的跟踪效果，另外还具有瞬态反应快、超调量小等特征，有效地避免了PID控制器所显示出的较大时滞性和较大超调量。研究表明，动态矩阵控制方法是一种较为理想的污水PH值控制方法，值得在工业生产和环境保护实践中加以应用。 关键词：污水处理；动态矩阵控制；PH中和反应；仿真  Abstract pH value control of wastewater treatment has the characteristics of nonlinearity, time lag, uncertainty, which makes the pH control become a difficult problem in wastewater treatment. Dynamic matrix control algorithm is based on the step response of the model, a predictive control algorithm can effectively avoid pH neutralization reaction in the process of nonlinear and time lag, so as to realize the effective control of PH value of wastewater treatment, for the industrial production, environmental protection is undoubtedly has great practical significance. In this paper, based on the summary of the front, dynamic matrix control method is applied to wastewater PH value control process simulation, to verify the advantage of the dynamic matrix control method. Research mainly for acid and alkali neutralization reaction of wastewater treatment process, using MATLAB Simulink to control the pH neutralization reaction process and the simulation experiment. The simulation results show that the dynamic matrix control algorithm for the control performance of PH neutralization reaction process was superior to that of PID algorithm, from the point of view of the whole control process, dynamic matrix control without off-line identification, on the parameter adjustment is relatively easy, it has good convergence and good tracking effect, it also has quick transient response, less overshoot, effectively avoid the PID controller is shown the amount o