高低温环境模拟系统中稳定舱压问题的研究

针对在高低温环境模拟系统综合试验中如何稳定大型空间的压力这一关键问题，采用专家 PID系统控制算法进行研究。介绍高低温环境模拟系统，引用专家系统的控制方法，建立知识库和推理机，模拟专家利用知识进行推理，并对未使用专家系统控制和使用专家系统控制2种效果进行比较分析。目前，该系统已顺利完成试验，并通过专家验收投入运行。运行结果表明：该算法能控制舱内压力稳定维持在微正压，达到了试验要求。

Research for Stability of Cabin Pressure in High/Low Temperature Environment Simulation System

How to stabilize the pressure of the large space in the comprehensive experiment of high/low temperature environment simulation system is a critical problem, to meet the test requirements, the expert PID system control algorithm is studied. This paper introduces high/low temperature environment simulation system, references to the control method of expert system, establishes the knowledge base and reasoning machine, simulates expert knowledge reasoning, and compares the used expert system control with the unused expert system control effect. At present, the system has been successfully completed test, passed the expert examination and put into operation. The running results show that the algorithm can maintain in micro positive pressure and control cabin pressure stability, reached the test requirement.