基于伪微分反馈的过程控制实验探究  

Process Control Experiment Exploration Based on Pseudo Differential Feedback(PDF)

作　　者：雷高伟 廖晓文 LEI Gaowei;LIAO Xiaowen(College of Automation,Guangdong University of Petrochemical Technology,Maoming 525000,Guangdong,China)

机构地区：[1]广东石油化工学院自动化学院,广东茂名525000

出　　处：《实验室研究与探索》2022年第5期99-103,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金重点项目(61933013);国家自然科学基金面上项目(62073090);茂名市科技计划项目(2020517);广东石油化工学院校级教研项目(234222)。

摘　　要：以单容水箱为被控对象,使用阶跃响应曲线法在PCT-III过程控制实验装置对系统模型参数进行辨识,并对模型进行归一化处理,得到单容水箱的数学模型。利用Matlab/Simulink构建基于PDF的液位控制系统仿真模型,在PDF控制的基础上加入前馈环节构成PDFF控制后,提高了系统的抗干扰能力,达到了与PID控制相媲美的跟踪能力。基于ITAE准则对控制器的参数进行优化,在PCT-III过程控制实验装置上对仿真结果进行验证,验证结果与仿真结果一致。The control strategy of large delay and nonlinear system is discussed with the case that a single tank is considered as the controlled object.The step response curve method is used to identify the system model parameters on the PCT-III process control experimental device,and the model is normalized to obtain the mathematical model of the single tank.The simulation model of PDF-based liquid level control system is built by MATLAB/Simulink.After adding feed-forward link to PDFF control on the basis of PDF control,not only the anti-interference ability of the system is improved,but also the tracking ability is comparable to that of PID control.The parameters of the controller are optimized based on ITAE criteria.Finally,the simulation results are verified on the PCT-III process control experimental device.The verification results are in good agreement with the simulation results.

关 键 词：伪微分反馈 过程控制 参数优化 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]