目前,空调房间所配置的风机型变风量末端装置(Variable Air Volume Box,VAV-Box)往往采用整数阶PID或PID-PI串级的调节方式,会导致室温控制的稳态误差和超调量均较大以及室内静压波动的问题。鉴于此,本文提出了风机型VAV-Box室温PI^λD^...目前,空调房间所配置的风机型变风量末端装置(Variable Air Volume Box,VAV-Box)往往采用整数阶PID或PID-PI串级的调节方式,会导致室温控制的稳态误差和超调量均较大以及室内静压波动的问题。鉴于此,本文提出了风机型VAV-Box室温PI^λD^μ-室内送风量PI^λ串级控制策略和修正的人群搜索算法实施控制器参数整定的设计理念。首先,结合空调工艺要求和自动控制技术,对风机型VAV-Box作用下的室温被控对象、室内温度和室内送风量测量变送器、室温PI^λD^μ控制器、室内送风量PI^λ控制器、变频器和送风机分别进行建模;其次,构建修正的人群搜索算法对PI^λD^μ和PI^λ两个控制器的8个参数进行整定,获取最佳值;最后,借助MATLAB工具,对该串级调节系统进行组态和数值模拟其控制效果。结果表明:基于修正的人群搜索算法的PI^λD^μ和PI^λ控制器参数整定和该串级调节系统在理论上是可行的,且相应的室温控制性能指标满足空调工艺的相关要求。展开更多
Variable air volume air-conditioning system(VAV system)has multiple control loops that interfered with each other,which has serious impacts on its actual operation effect.To solve this problem,the index of global hydr...Variable air volume air-conditioning system(VAV system)has multiple control loops that interfered with each other,which has serious impacts on its actual operation effect.To solve this problem,the index of global hydraulic stability,which takes the physical quantity of the pipe network pressure and the air flow rate as reference,is proposed based on Graph theory,and a pipe network model for the hydraulic calculation is built.Then,the simulation study based on the actual operation data is carried out in MATLAB.The distribution of the pressure and the air flow in the pipe network is obtained,and the action interferences among adjacent terminal boxes are analyzed based on global hydraulic stability under damper position regulation strategy(DP strategy)and fan frequency regulation strategy(FF strategy).Results indicate that the FF strategy can decrease the total change distance of the damper position compared with the DP strategy,and then the fluctuation of the pressure and the air flow can be reduced.The contribution of this study is to provide an evaluation index of global hydraulic stability,which can also be used in other air-conditioning systems with multiple terminals and multiple control loops.展开更多
文摘目前,空调房间所配置的风机型变风量末端装置(Variable Air Volume Box,VAV-Box)往往采用整数阶PID或PID-PI串级的调节方式,会导致室温控制的稳态误差和超调量均较大以及室内静压波动的问题。鉴于此,本文提出了风机型VAV-Box室温PI^λD^μ-室内送风量PI^λ串级控制策略和修正的人群搜索算法实施控制器参数整定的设计理念。首先,结合空调工艺要求和自动控制技术,对风机型VAV-Box作用下的室温被控对象、室内温度和室内送风量测量变送器、室温PI^λD^μ控制器、室内送风量PI^λ控制器、变频器和送风机分别进行建模;其次,构建修正的人群搜索算法对PI^λD^μ和PI^λ两个控制器的8个参数进行整定,获取最佳值;最后,借助MATLAB工具,对该串级调节系统进行组态和数值模拟其控制效果。结果表明:基于修正的人群搜索算法的PI^λD^μ和PI^λ控制器参数整定和该串级调节系统在理论上是可行的,且相应的室温控制性能指标满足空调工艺的相关要求。
基金supported by the National Natural Science Foundation of China (Grant No.52,078,096)the Fundamental Research Funds for the Central Universities (Grant No.DUT20JC47)the open Foun-dation of the Key lab of Anhui Province Key Laboratory of Intelligent Building&Building Energy Saving (Grant No.IBES2021KF03).
文摘Variable air volume air-conditioning system(VAV system)has multiple control loops that interfered with each other,which has serious impacts on its actual operation effect.To solve this problem,the index of global hydraulic stability,which takes the physical quantity of the pipe network pressure and the air flow rate as reference,is proposed based on Graph theory,and a pipe network model for the hydraulic calculation is built.Then,the simulation study based on the actual operation data is carried out in MATLAB.The distribution of the pressure and the air flow in the pipe network is obtained,and the action interferences among adjacent terminal boxes are analyzed based on global hydraulic stability under damper position regulation strategy(DP strategy)and fan frequency regulation strategy(FF strategy).Results indicate that the FF strategy can decrease the total change distance of the damper position compared with the DP strategy,and then the fluctuation of the pressure and the air flow can be reduced.The contribution of this study is to provide an evaluation index of global hydraulic stability,which can also be used in other air-conditioning systems with multiple terminals and multiple control loops.
