【作者】 熊璐；

【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， 2007， 硕士

【摘要】 暖通空调(HVAC)自控系统是智能建筑能量管理系统(energy management control，EMC)的重要组成部分，而变风量(variable air volume，VAV)空调系统从节能和提高室内环境质量的角度来看是一种有效形式。因此，对VAV空调系统进行有效的控制具有重要的意义。本文以北京首都国际机场3号航站楼扩建工程(Terminal 3，T3)智能楼宇管理系统为背景，以国内旅客候机楼(T3A)二楼候机大厅的VAV变风量空调系统为研究对象，在了解了整个工程的结构特点的基础上，分析了VAV空调系统的结构和控制原理，通过系统辨识和机理建模的方法建立了VAV空调各子系统的数学模型，根据该系统存在大滞后的特点，采用Smith预测控制法，通过在控制回路中加入Smith预估器，预先估计出系统的动态响应，使被延迟的输出提前反馈到调节器，由预估器提前进行补偿，从而减少超调量与加速调节过程。但是，该方法也存在不能完全抗干扰的缺陷，对此本文提出将前馈补偿FFC(Feed Forward Control)与Smith预测控制相结合，得到改进的FFC-Smith控制方法，利用前馈补偿校正作用及时的特点，结合反馈作用尽量减少干扰对调节量的影响，使系统能够保持稳定状态。最后，对两种控制方法进行系统仿真比较，结果表明，FFC-Smith在各性能指标方面均优于Smith控制，效果较好。更多还原

【Abstract】 From the view point of saving energy and improving the indoor air quality, variable air volume (VAV) air-conditioning system is one effective type of the heating, ventilating and air-conditioning (HVAC) control systems, which is the important part of intelligent building energy management control (EMC) system. So, it is to control the VAV air-conditioning system effectively.The background of the paper is intelligent building management system of Beijing Capital International Airport Expansion Project (T3). The VAV air-conditioning system of the new built terminal for domestic passengers (T3A) is studied in the paper. On the basis of learning the project structure, the structure and control theory of the VAV air-conditioning system are analyzed and the mathematical models of correlative subsystems are developed by system identification and mechanism modeling.For plant with large time delay in the system, Smith predictive control is used in the paper. The dynamical characteristic of system is predicted and compensated by adding Smith predictor in the control loop, so that the output delayed is pre-displayed on regulator to reduce the overshoot and regulation-process. The influence from system interference is not removed completely with Smith predictive control yet, to solve the problem the Smith predictive control is improved by combining with Feed-Forward Compensation. The character of regulating in time is used in FFC-Smith control to reduce the interference influencing to output through the system feedback, then the system is in stable condition. At last, from the contrast of the simulation curve for the two control strategy, the FFC-Smith control is superior to the Smith control in many performances and the result is satisfactory.更多还原