环境试验室热工系统传递函数模型试验研究
Experiment of transfer function model of an environment chamber thermodynamic system
摘要：
针对环境试验室热工系统多变量、大时滞、非线性的控制难题探讨了其传递函数模型。首先，根据各被控回路的动态热工特性，推导得出了其微分方程和传递函数模型。然后，根据模型参数辨识要求，试验研究了各回路的动态响应特性，得到了各回路的时间序列试验数据；利用试验数据和最小二乘法，完成了各回路传递函数模型参数的辨识和模型阶次的对比分析，得到了各回路的传递函数模型。最后，利用传递函数模型，采用规则自提取模糊控制方法仿真研究了基于送风系统调节和热水系统调节的环境试验室温度模糊控制，得到了较好的控制仿真效果，为进一步试验研究环境试验室热工系统的模糊控制提供了理论基础。
Abstract：
Discusses the problems of modeling thermal performance transfer functions of the environment chamber thermodynamic system, which is a multi-variable, large time-delay and nonlinear system. Derives the differential equations and corresponding transfer functions of the controlled loops based on their thermodynamic performance. For the demands of parameter identification of the transfer functions, studies the dynamic responding performance of the controlled loops and obtains the time sequence experimental data. Based on the experimental data, executes the parameter identification of the transfer functions of the loops, compares and analyses the orders of the transfer functions, and gains a set of satisfied transfer functions using the least square method. And implements the fuzzy control simulation on the temperature of the environment chamber based on the adjustment of supply air system and hot water system using the method of self-abstracting rule fuzzy control (SARFC) and achieves satisfied control effect, providing a theoretic basis for further study on fuzzy control performance of environment chamber thermodynamic systems.
Keywords:environmentchamber,thermodynamicperformance,parameteridentification,self-abstractingrulefuzzycontrol,controlsimulation