%0 Journal Article
%T Improved Smith predictive compensation and decoupling in refrigeration system<br>制冷系统的改进Smith预估补偿和解耦控制
%A LI Zhao-bo
%A WU Ai-guo
%A HE Yi
%A ZHAI Wen-peng
%A <br>李兆博
%A 吴爱国
%A 何熠
%A 翟文鹏
%J 控制理论与应用
%D 2013
%I 
%X Firstly, a model identification of refrigeration system is carried out on the basis of experiment to obtain a second-order transfer function matrix with dual-input and dual-output, which is then verified. Secondly, an improved Smith predictive compensation and decoupling control are developed for the refrigeration system and simulated. Finally, the dual closed-loop control system consisting the variable minimal superheat-control and constant evaporation temperature-control is proposed. Besides, an experimental method to obtain the minimal superheat curve is developed. Compared with the PID control, this method provides better steady and dynamic performances in strong coupling, delay and inaccuracy in the identification model, and meets with the control requirements in variable load and variable minimal superheat.
%K refrigerating machinery
%K compressors
%K frequency converters
%K pure time-delay
%K Smith predictor
%K variable load
%K superheat<br>制冷装置
%K 压缩机
%K 变频器
%K 纯滞后
%K Smith预估
%K 变负荷
%K 过热度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=970898A57DFC021F93AB51667BAED7F7&aid=2DB3B6D3544EDEBD01D4F37FFE31D2E1&yid=FF7AA908D58E97FA&vid=340AC2BF8E7AB4FD&iid=CA4FD0336C81A37A&sid=480C51B1F0CE0AB6&eid=7555FB9CC973F695&journal_id=1000-8152&journal_name=控制理论与应用&referenced_num=0&reference_num=0