The temperature control system of a blackbody in the vacuum cryogenic environment is a nonlinear and hysteretic system, and its mathematical model is not easy to build. Based on the analyses of the structure, components and the system in general, an algorithm of fuzzy control and intelligent PID control is developed for temperature adjusting of the system. A set of fuzzy control rules are established with sufficient digesting of the test data. The self-developed software, based on that algorithm, achieves auto-control and is used in some irradiation calibration tests. Test data validate the applicability of the control algorithm, which accelerates the wanning up process, improves the system stability, and achieves a satisfactory temperature control.%工作在真空低温环境下的黑体控温系统是一种非线性、大滞后、数学模型很难建立的系统.文章通过分析系统的结构、组成和原理,选择了模糊控制和智能PID控制相结合的算法.通过分析多次的试验数据,建立并完善了模糊控制规则表.基于该算法的控温软件,实现了系统的自动控制,已服务于某型号辐射定标试验.文章最后给出的试验数据验证了控制算法的合理性,该算法加快了系统升温速度,提高了系统稳定性,取得了良好的控温效果.
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