System model simulation and control method used in environmental simulation chambers
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摘要: 环境试验时需要精确控制环境模拟舱体内的温度以满足军标要求,同时为了解决环境模拟舱体内加热过程中升温速率与控制精度之间的矛盾,在对其温度变化进行动态特性分析与建模的基础上,提出采用专家控制策略控制环境模拟舱内的温度,并对其控制效果进行了仿真研究.仿真结果与现场运行调试结果均表明:专家控制方法具有无超调、响应速度快、稳态精度高、加温效率明显的优点,是可行和有效的;与试验数据相比,建立的传热模型和控制系统模型具有较高的准确性,符合实际情况.这种建模仿真及控制方法为实际过程中研究控制规律提供了有力的参考和帮助,对研究类似问题具有深远意义.Abstract: According to the dynamic state characters of the environmental simulation chamber, a lumped parameter model of temperature and a mathematical model of control system is established to accurately control the temperature of the environmental chamber to measure up to GJB, raise temperature rate and promote control precision. An expert control method is introduced into the design of the temperature control system which is simulated on the platform of MATLAB. By contrast the simulated result with the experimental data, the validation of the lumped parameter model has been proved and the expert control method has been showed with the advantage of no-overshoot, fast response, high precision and great efficiency. The presented methods for the simulation and the control system provide great references to the research on the control laws of other similar problem and show great significance to the relative research field.
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Key words:
- environmental chamber /
- mathematical model /
- simulation /
- temperature control /
- expert system
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