摘要
针对空调系统变露点控制方法中温、湿度之间的耦合作用,提出一种温、湿度解耦控制方案。该方案通过引入绝对湿度作为中间变量来控制机器露点,将温、湿度耦合系统进行解耦。采用机理分析和试验数据分析相结合的方法,建立了两输入两输出的传递函数模型,设计前馈补偿和PID控制相结合的控制系统。MATLAB仿真结果表明该方法的控制效果较好,为温、湿度控制提供了一种行之有效的方法。
A temperature and humidity decoupling control method was presented in this paper to resolve the coupling problem between temperature and humidity in air-conditioning variable dew point control system. By introducing absolute humidity as an intermediate variable to control the machine dew point, temperature and humidity of system can be decoupled. Two input and two output transfer function model was established by combining the theoretical analysis with the data analysis of experiment, and a control system consisting of a feedforward compensation decouple control and PID control is designed. The simulation based on MATLAB results demonstrated that this method is effectiveness, and is also effective to control temperature and humidity system.
出处
《建筑热能通风空调》
2008年第6期40-43,共4页
Building Energy & Environment
关键词
变露点
温湿度控制
传递函数模型
解耦控制
PID控制
variable dew point, temperature and humidity control, transfer function model, decoupling control, PID control
