摘要
目前,空调房间配用的变风量末端装置(Variable Air Volume Terminal,VAV-TMN)往往采用整数阶PID-P串级调节方式,这带来了室温控制误差和超调量较大以及调节时间较长等问题。鉴于此,提出了空调VAV-TMN的室温分数阶PID-送风量PI的串级调节器设计方法。首先,综合分析空调工艺和自动控制的相关要求,对室内温度对象、温度和风量测量变送单元、送风量执行单元分别进行建模,确定主控制器为室温分数阶PID控制器(Indoor Temperature Fractional Order Proportional Integral Derivative Controller,IT-FOPIDC)和副控制器为送风量PI控制器(Sending Air Volume Proportional Integral Controller,SAV-PIC)的控制策略。其次,基于改进的自适应差分进化(Improved Parameter Self-adaptive Differential Evolution,IPSA-DE)算法来分别整定出IT-FOPIDC和SAV-PIC的控制参数最佳值。最后,借助MATLAB/Simulink工具,对该空调VAV-TMN的室温PIλDμ-送风量PI串级调节系统进行组态和数值模拟相应的控制效果。结果表明,该串级控制系统在理论上是可行的,且室温的控制效果明显优于基于Ziegler-Nichols整定法和DE算法的整数阶室温PID-送风量PI串级调节系统。
At present,integer order PID-P cascade control method is usually adopted for the variable air volume terminal(VAV-TMN)in an air-conditioned room,which brings about the problems of larger control error and overshoot of indoor temperature and the longer adjustment time,etc.In view of this,this paper presents a design method of a cascade fractional order regulator on indoor temperature PID plus sending air volume PI for the VAV-TMN in an air-conditioning room.First,based on the analysis of the relevant requirements of air conditioning process and automatic control,the indoor temperature plant,measurement transmission units of temperature and air volume,and actuator of sending air volume are modeled,respectively,and then the main controller is indoor temperature fractional order PID controller(IT-FOPIDC)and the secondary one is sending air volume PI controller(SAV-PIC)in our control strategy.Secondly,the optimal values of controller parameters of IT-FOPIDC and SAV-PIC are adjusted respectively by an improved parameter self-adaptive differential evolution(IPSA-DE)algorithm.Finally,by means of MATLAB/Simulink tool,this cascade adjustment system of indoor temperature PIλDμplus sending air PI for an air conditioning VAV-TMN is configured and the related control effects are numerically simulated.The results show that the cascade control system is feasible in theory and the control effects is better than those of the corresponding cascade control systems of indoor temperature integer order PID plus sending air volume PI whose controller parameter values are adjusted by Ziegler-Nichols setting method and DE-algorithm,respectively.
作者
李鹏波
李绍勇
吴宗礼
李海林
魏先宏
Li Pengbo;Li Shaoyong;Wu Zongli;Li Hailin;Wei Xianhong(School of civil engineering,Lanzhou university of technology,Lanzhou,730050)
出处
《制冷与空调（四川）》
2018年第4期428-434,450,共8页
Refrigeration and Air Conditioning
基金
兰州理工大学博士基金(编号:B04-237)
兰州理工大学建工七七基金(编号:TM-QK1301)
关键词
空调变风量末端装置
室温分数阶PID控制器
串级控制
改进的参数自适应差分进化算法
数值仿真
air-conditioning variable air volume terminal(VAV-TMN)
indoor temperature fractional order PID controller(IT-FOPIDC)
cascade control
improved parameter self-adaptive differential evolution(IPSA-DE)algorithm
numerical simulation
