压缩式制冷系统双回路无模型控制方法  

Model-free Control Method of Double-loop in Refrigeration System

作　　者：尚羽佳 王卫军 刘克冲 Shang Yujia;WANG Wei Jun;Liu Kechong(Instrumentation Technology and Economy Institute,Beijing 100055;Beijing Waterworks Group Co.,Ltd.Tiancunshan Waterworks,Beijing 100049)

机构地区：[1]机械工业仪器仪表综合技术经济研究所,北京市100055 [2]北京市自来水集团有限责任公司田村山净水厂,北京市100049

出　　处：《仪器仪表标准化与计量》2018年第6期25-29,共5页Instrument Standardization & Metrology

基　　金：国家重点研发计划课题专项资金资助<2016YFF0202002>

摘　　要：目前,恒定蒸发温度和最小稳定过热度双回路控制方案是制冷系统先进节能控制方案之一。一方面,实际中采用PID控制蒸发器过热度时会产生振荡。另一方面,现有制冷系统稳态模型不适于变负荷工况分析,制冷系统高阶、耦合、非线性动态模型控制分析困难。无模型控制算法不需系统精确模型、适于复杂非线性系统。本文将无模型控制方法应用于双输入双输出制冷机节能控制方案中。仿真结果表明,系统输出稳定且动态性能改善。Recently, double-loop control of the constant evaporation temperature and the minimum stable superheat is one of the advanced energy-saving control method in refrigeration system. On the one hand, practical superheat control with PID method usually lead to unstable output. On the other hand, the steady model is not suitable for variable load analysis and the high-order, coupling and non-linear dynamic model is diffcult to analysis and control. However, model-free control method don’t need accurately model and it is suitable for complex nonlinear system. Model-free control is applied to dual-input dual-output the refrigeration system energy-saving control in this article. The simulation result shows that the dynamic control performance of the system is improved.

关 键 词：制冷系统 双回路 过热度 无模型控制 

分 类 号：TB65[一般工业技术—制冷工程]