【作者】 宫涛；

【导师】 任庆昌；

【作者基本信息】 西安建筑科技大学 ， 控制理论与控制工程， 2004， 硕士

【摘要】 从节能和提高室内环境质量的角度来看，暖通空调(HVAC)自控系统是楼宇自动化中最重要的系统。因此，采用有效的空气调节方式对智能建筑的能量管理控制(energy management control，EMC)具有重要意义。目前，变风量(variable air volume，VAV)空调系统以其巨大的节能潜力逐渐成为国内外空调系统的主流。本论文对变风量空调系统中的定静压控制和最小总送风量控制进行实验研究。针对目前变风量空调系统的模型都是用机理建模方法建立的情况，本论文用最小二乘法对机组部分进行系统辨识，建立了水阀—送风温度、变频风机—静压两个回路的模型，经验证比较接近实际系统；采用遗传算法对PID控制器的参数进行寻优，寻优结果令人满意；设计了变风量空调系统的LON控制网络，以此为实现手段，进行了定静压控制和最小总送风量控制，并在两种控制方式下，分析了各个回路的耦合情况、两种控制方式的稳定性和节能效果。实验结果表明，定静压控制方式下系统较为稳定，最小总送风量控制比定静压更加节能，但它延长了末端阀位的调节时间，在系统调试时，我们可通过选择合适的采样时间来缩短阀门的调节过程，所以最小总送风量控制具有广阔的应用前景。同时，论文还给出了以Visual Basic设计的监控软件。该软件操作界面良好，通过DDE技术与系统软件实现了数据交换。更多还原

【Abstract】 Of all Ihe Building Automation Systems (BAS), heating, ventilating and air-conditioning (HVAC) systems are most important from the viewpoint of saving energy and improving the quality of the indoor environment. Therefore, adopting efficient control strategies for air-conditioning plays a vital role in developing improved energy management control (EMC) systems for intelligent buildings (IB). Nowadays, VAV air-conditioning system has gradually become most popular in China and abroad because of its sigraficant energy saving. The paper studies the static pressure control and minimum total supply air volume control of VAV air-conditioning system by experiment At present VAV air-conditioning system are all modelled by the method of mechanism analysis. To the point the paper ideritifies the part of the air-handling unit by the recursive least-squares method. It is concluded that the models of water damper-supply air temperature’s loop and supply air fan-static pressure’s loop ate close to the teal system. Genetic algorithm is used to optimize the parameters of PID controller that is used to control the plant LON (local operating network) is designed to control VAV air-conditioning system. By this means the static pressure control and minimum total supply air volume control are experimented. The paper analyzes the coupling among loops, the whole system’s stability and energy saving effect under the two control methods. The experiment’s results show that the system is stable under the static pressure control and energy saving under the minimum total supply air volume control. Although the terminal dampers’s tuning time is prolonged under the minimum total supply air volume control, it can be reduced by adopting the appropriate sampling time when debugging the system. From all of this we can conclude thart the minimum total supply air volume control has a good application perspective. Also, the paper has provided a program for the system’s monitoring and control. It is designed by visual basic. The program has fine operating interface and exchanges data with the system of Lonworks and Metasy by DDE (dynamic data exchange) technique.更多还原