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低溫黑體自動(dòng)控溫新技術(shù)

A new technique for automatic temperature control of cryogenic blackbody

  • 摘要: 工作在真空低溫環(huán)境下的黑體控溫系統(tǒng)是一種非線性、大滯后、數(shù)學(xué)模型很難建立的系統(tǒng)。文章通過分析系統(tǒng)的結(jié)構(gòu)、組成和原理，選擇了模糊控制和智能PID控制相結(jié)合的算法。通過分析多次的試驗(yàn)數(shù)據(jù)，建立并完善了模糊控制規(guī)則表。基于該算法的控溫軟件，實(shí)現(xiàn)了系統(tǒng)的自動(dòng)控制，已服務(wù)于某型號(hào)輻射定標(biāo)試驗(yàn)。文章最后給出的試驗(yàn)數(shù)據(jù)驗(yàn)證了控制算法的合理性，該算法加快了系統(tǒng)升溫速度，提高了系統(tǒng)穩(wěn)定性，取得了良好的控溫效果。

     

    Abstract: 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 warming up process, improves the system stability, and achieves a satisfactory temperature control.

     

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