制冷系统的综合优化控制模型

Model of Refrigeration System for Optimizing Control

建立了制冷系统的多输入多输出模型 .系统模型中包含了用集总参数和相移动边界法建立的热交换器动态模型 ,以及压缩机和膨胀阀的稳态流动模型 .在以模型为基础的各种智能控制方式中 ,所建立的系统模型对制冷机控制具有通用性 .它能完整地反映制冷系统的多输入多输出关系 ,并能从模型仿真中获得系统参数之间的动态关联 ,从而根据分析结果采取相应的控制对策 ,因此它不仅是进行整个系统综合优化控制的基础 。

A multi input multi output(MIMO) model of refrigeration system is proposed. The system model comprises the dynamic heat exchanger model based on the lumped parameter method and moving phase boundary method, and the stable flow models of compressor and expansion valve. Of the various intelligent controlling methods based on model, the proposed model is general for refrigeration machine control. It could be used to describe the relations between multi input and multi output parameters of refrigeration system, and to obtain the dynamic link among system parameters, so as to take control measures correspondently according to its analysis results. It is applicable to the optimizing control of whole refrigeration system, and to the optimizing control of the refrigeration system with given parameters and control method.