The traditional integer order PID controller manipulates the air-conditioning fan coil unit(FCU)that offers cooliug and heatins loads to each air-conditioning room in summer and winter,respectivelv.In order to maintai...The traditional integer order PID controller manipulates the air-conditioning fan coil unit(FCU)that offers cooliug and heatins loads to each air-conditioning room in summer and winter,respectivelv.In order to maintain a steady indoor temperature in summer and winter,the control quality cannot meet the related requirements of air-conditioning automation,such as large overshoot,large steady state error.long regulating time,etc.In view of these factors,this paper develops a fractional order PID controller to deal with such problem associated with FCU.Then,by varving mutation factor and crossover rate of basic differential evolution algorithmadaptivelv,a modified differential evolution algorithm(MDEA)is designed to tune the satisfactory values of five parameters of indoor temperature fractional order PID controller.This fractional order PID coutrol system is configured and the corresponding mumerical simulation is conducted by means of MATLAB software.The results indicate that the proposed fractional order PID control svstem and MDEA are reliable and the related control performance indexes meet with the related requirements of comfortable air-conditioning design and control criteria.展开更多
由于机型体积小,安装、操作方便和分散控制等特点,风机盘管(Fan Coil Unit,FCU)空调系统在办公楼、宾馆和公寓等建筑场所得到了广泛应用。然而,其主要设备-FCU具有惯性和较大时间滞后等动态特性,传统控制方式,如整数阶PID方式会导致室...由于机型体积小,安装、操作方便和分散控制等特点,风机盘管(Fan Coil Unit,FCU)空调系统在办公楼、宾馆和公寓等建筑场所得到了广泛应用。然而,其主要设备-FCU具有惯性和较大时间滞后等动态特性,传统控制方式,如整数阶PID方式会导致室温稳态误差和超调量较大,调节时间长等问题。鉴于此,提出FCU的室温分数阶PID(PIλDμ)控制器参数整定新算法及其控制系统构建的设计思路。首先,结合空调工艺的相关要求和分数阶控制技术,分别对FCU作用下的室内温度对象、室温测量变送器、FCU的送风单元、冷却/加热单元和室温PIλDμ控制器(Indoor Temperature Fractional Order Proportional Integral Derivative Controller,IT-FOPIDC)进行建模。其次,基于改进的蚁群优化算法(Improved Ant Colony Optimization Algorithm,IACOA)对该IT-FOPIDC的5个控制参数进行整定,获取其最佳值。最后,借助Matlab工具,对FCU作用下的空调房间室温PIλDμ调节系统进行组态和数值模拟其控制效果。结果表明,该室温PIλDμ调节系统在理论上是可行的,且室温控制效果明显优于Ziegler-Nichols(Z-N)整定法和ACOA算法的室温整数阶PID控制系统。展开更多
基金the National Natural Science Foundation of China(Nos.61364004 and 51808275)the Chinese Scholars to Study Overseas Sponsored by ChinaScholarship Council Foundation(No.201408625045)+1 种基金the Doctoral Research Funds of Lanzhou University of Technology(No.04-237)the Alumni Foundation Civil Engineering 77,Lanzhou University of Technology(No.TM-QK1301)。
文摘The traditional integer order PID controller manipulates the air-conditioning fan coil unit(FCU)that offers cooliug and heatins loads to each air-conditioning room in summer and winter,respectivelv.In order to maintain a steady indoor temperature in summer and winter,the control quality cannot meet the related requirements of air-conditioning automation,such as large overshoot,large steady state error.long regulating time,etc.In view of these factors,this paper develops a fractional order PID controller to deal with such problem associated with FCU.Then,by varving mutation factor and crossover rate of basic differential evolution algorithmadaptivelv,a modified differential evolution algorithm(MDEA)is designed to tune the satisfactory values of five parameters of indoor temperature fractional order PID controller.This fractional order PID coutrol system is configured and the corresponding mumerical simulation is conducted by means of MATLAB software.The results indicate that the proposed fractional order PID control svstem and MDEA are reliable and the related control performance indexes meet with the related requirements of comfortable air-conditioning design and control criteria.
文摘由于机型体积小,安装、操作方便和分散控制等特点,风机盘管(Fan Coil Unit,FCU)空调系统在办公楼、宾馆和公寓等建筑场所得到了广泛应用。然而,其主要设备-FCU具有惯性和较大时间滞后等动态特性,传统控制方式,如整数阶PID方式会导致室温稳态误差和超调量较大,调节时间长等问题。鉴于此,提出FCU的室温分数阶PID(PIλDμ)控制器参数整定新算法及其控制系统构建的设计思路。首先,结合空调工艺的相关要求和分数阶控制技术,分别对FCU作用下的室内温度对象、室温测量变送器、FCU的送风单元、冷却/加热单元和室温PIλDμ控制器(Indoor Temperature Fractional Order Proportional Integral Derivative Controller,IT-FOPIDC)进行建模。其次,基于改进的蚁群优化算法(Improved Ant Colony Optimization Algorithm,IACOA)对该IT-FOPIDC的5个控制参数进行整定,获取其最佳值。最后,借助Matlab工具,对FCU作用下的空调房间室温PIλDμ调节系统进行组态和数值模拟其控制效果。结果表明,该室温PIλDμ调节系统在理论上是可行的,且室温控制效果明显优于Ziegler-Nichols(Z-N)整定法和ACOA算法的室温整数阶PID控制系统。
