文档介绍：基于模糊PID算法的中央空调温度控制系统设计
The Application Research on Fuzzy PID Control in Central air conditioner System Control
摘要
随着现代生活不断向智能化迈进,人们对中央空调的性能提出了更高的要求,如空调的舒适性、节能性等。本文重点研究如何在中央空调系统中使用智能化的冷水机组控制系统,从而既能提供舒适的生活工作环境,又能最大限度的节约能源。
文中首先分析了中央空调的工作机理和中央空调的大滞后、大惯性的特性,介绍了适合过程控制的模糊控制理论,并给出了模糊PID控制器的具体设计方法。在对中央空调冷却水循环系统进行变频控制的基础上,针对冷却水的水泵机组设计了模糊PID控制器,通过仿真表明模糊PID控制可以较好的实现控制要求。文中还详细介绍了中央空调温度控制系统的硬件和软件设计,该系统采用西门子的S7-200 PLC作为控制单元,利用模糊PID控制算法,通过交流变频调速器控制水泵速度,保证系统根据实际负荷的情况调整流量,实现恒温控制,同时又可以节约大量能量。
关键词:中央空调、模糊PID、PLC、变频器
The Application Research on Fuzzy PID Control in Central air conditioner System Control
Abstract
As modern e more intelligent day-by-day, people hope central air conditioner have more excellent capability, such fort and energy saving. This paper mostly research on how to use intelligent controller to control water circulation system of central air conditioner, so the air conditioner can fort and use less energy as possible.
In this paper, we analyze the mechanism of central air conditioner and its inertia and hysteresis; introduce fuzzy PID control which is suit for inertia and hysteresis process control. And present the design method for fuzzy PID controller. In this paper. We do frequency conversion design for cooling water system, and basing on this, we used fuzzy PID controller to control water pumps of the cooling water system. The paper did some simulations on the central air conditioner model with fuzzy PID controller, and then finished the hardware and software design for the control system. The control system took the S7-200 PLC as core and drive pumps by frequency conversion. This control can adjust its power and carry out constant temperature, as well as save a great deal energy.
Keywords: Central air conditioner, Fuzzy PID control, PLC, Frequency conversion
致谢
在论文完成之际,我要特别感谢我的指导老师葛锁良老师的热情关怀和悉心指导。在我撰写论文的过程中,葛老师倾注了大量的心血和汗水。在整个研究生学习阶段,他广博的学识、深厚的学术素养、严谨的治学精神和一丝不苟的工作作风,深深地感染和激励着我。从课题的选择到论文的即将完成,葛老师都始终给予我细心的指导和不懈的支持。在此谨向葛老师致以诚挚的谢意和崇高的敬意。
此外,我还要感谢和我一起度过