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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。
Aiming at the multivariable, large time-delay and non-linear control problems in thermal system of environmental laboratory, the transfer function model is discussed. First, according to the dynamic thermal characteristics of each controlled circuit, the differential equation and transfer function model are deduced. Then, according to the requirements of model parameter identification, the dynamic response characteristics of each loop are experimentally studied and the time series test data of each loop are obtained. Using the test data and the least square method, the parameters of the transfer function model are identified and the model order The comparison and analysis, get the transfer function model of each circuit. Finally, by using the transfer function model and the rule-based self-extracting fuzzy control method, the fuzzy control of environmental laboratory temperature based on the regulation of the air supply system and the hot water system is simulated and the control simulation results are obtained. In order to further test the environmental test The fuzzy control of chamber thermal system provides the theoretical basis.