VAV控制系统的稳定性研究

摘要

变风量(VAV)控制系统产生振荡是VAV空调系统的最大问题之一。本文建立了空调室及控制器的动态特性模型，在此基础上，自行开发了计算机仿真系统，并利用这套仿真系统对VAV空调系统进行了仿真。仿真结果显示出，VAV控制系统的稳定范围受控制参数和系统参数的影响。得出的极限参数ku、ωu的数学式对现场具有一定的指导作用，并与现场实例吻合。本文为VAV控制系统的动态性能研究提供了一种实用而有效的方法。%It is one of the bigest problems of the VAV air-conditioning system that the VAV control system produces hunting.This paper deals with the establishment of dynamic models for an air conditioned room and controller.Based on these models,a computer simulation system is developed,which is used to simulate the VAV air-conditioning system.The simulated result shows that the stability range of the VAV control system is influenced by both control and system parameters.The ultimate parameter models can be used to guide production.The paper provides a practical method for the dynamic performance research of the VAV control system.