Nonlinear adaptive decoupling control for the forced-circulation evaporation process
作者单位：College of Information and Electronic EngineeringShenyang Agricultural University State Key Laboratory of Synthetical Automation for Process IndustriesNortheastern University IEEE
会议名称：《第36届中国控制会议》
主办单位：Dalian University of Technology;Systems Engineering Society of China (SESC);Technical Committee on Control Theory (TCCT), Chinese Association of Automation (CAA)
会议日期：2017年
学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 08[工学] 0802[工学-机械工程] 0835[工学-软件工程] 083201[工学-食品科学] 0701[理学-数学] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 080201[工学-机械制造及其自动化]
基 金：supported by the National Natural Science Foundation of China under Grant 61673281 the China Postdoctoral Science Foundation under Grant 2015M571328 the Scientific Research Fund of the Department of Education of Liaoning Province under Grant L2015491
关 键 词：Forced-circulation evaporator Nonlinear decoupling control GLC Parameter estimation EKF
摘 要：The forced-circulation evaporator is a multi-input multi-output nonlinear process which has complex dynamics characteristics, such as strong coupling, serious nonlinearity and parameter uncertainty. As a result, the conventional control strategy can not achieve satisfactory control performance. A nonlinear adaptive decoupling control strategy is proposed in this paper. The control strategy combines globally linearizing control（GLC） algorithm with a parameter estimator. The GLC is used to eliminate the coupling between the two control loops and reduce the effects of the nonlinearities on the system simultaneity. The model parameter is estimated by using an extended Kalman filter（EKF） algorithm, which is able to track changes of the forced-circulation process. Simulation results show that the proposed method has good estimation for the model parameter in addition to the high-quality decoupling control performance provided by the GLC controller.