户式中央空调系统的复合控制器设计  

Design of composite controller for the household centre air conditioning system

作　　者：杨世勇[1] 徐国林[2] 

机构地区：[1]烟台大学计算机学院,山东烟台264005 [2]烟台职业学院电气工程系,山东烟台264000

出　　处：《电气传动自动化》2012年第1期40-43,50,共5页Electric Drive Automation

摘　　要：针对空调系统纯滞后、多干扰的特性,提出了一种复合控制方案。首先,建立了被控对象的数学模型,并基于此模型初步设计了一个常规PID控制器;然后,针对对象的滞后环节对系统产生大超调量问题,加入了Smith补偿器,有效地减小了超调量;最后,通过引入前馈控制,有效地消除了干扰对系统产生的不良影响。通过仿真实验结果,不仅验证了各设计方案的正确性和有效性,也充分展示出该复合控制器的优良特性。A composite control method is presented for the air conditioning system with big pure time delay,which is liable to suffer strong interference.Firstly,a mathematical model of the process controlled is built,and a common PID controller is designed initially based on the mathematical model.Then,the Smith compensator is added in order to reduce the big overshoot as a result of the big pure time delay.In the end,the bad effect due to the strong interference is overcome by means of introducing the feed-forward control.By the results of the simulation experiments,the correctness and validity of the designs are confirmed,and the good characteristics of the composite controller are shown fully.

关 键 词：空调系统 数学模型 PID控制 SMITH补偿器 前馈控制 仿真 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]