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预测PID在馆藏湿度控制系统中的应用研究

2017-09-03吴攀曹珍贯朱克亮

吴攀 曹珍贯 朱克亮

摘 要:馆藏湿度控制系统是一个大滞后环节系统,控制模型难以建立,常规控制算法响应速度慢、超调严重,控制效果不理想。为提高库房湿度的控制效果与精度,将预测控制算法与PID算法相结合,取两种算法的优点,提出利用预测PID算法实现对库房湿度的控制,并将该算法移植到ARM中,构建馆藏湿度控制系统,进行运行测试。实际应用表明,预测PID控制算法能够快速使馆藏库房的湿度稳定在设定值,上下波动范围较小,控制精度高,该算法的实施对现有库房的湿度控制有较好的应用意义。

关键词:预测PID;湿度控制;馆藏系统

中图分类号: G251 文献标志码:A

文章编号:1672-1098(2017)05-0034-05

Abstract:Library Collection humidity control system, with control model difficult to be established and low response speed and serious overshoot of conventional algorithm, is a big lagging link system and thus the control effect is not satisfactory. In order to enhance the control effect and precision of the warehouse humidity, the predictive control algorithm was combined with PID in this paper and the predictive PID algorithm was used to control the library collection humidity. Furthermore, this algorithm was transplanted into the ARM, constructing the library collection humidity control system to have a running test. It was shown from the practical application that the predictive PID control algorithm had a good effect on the warehouse humidity control with small fluctuation and high control precision, which could achieve the control requirements of the collection humidity system.

Key words:Predictive PID; humidity control; library collection system

在图书馆和档案馆管理中,档案资料和纸质图书室中的重要藏书,需要在科学合理的温湿度环境下才能长期保存,通常保持相对湿度50%~60%RH以及10~18℃的温度环境可以

防止资料虫蛀、变质,因此需要配置空调机、除湿机来对馆藏系统的温度、湿度进行控制,使温湿度保持在合理的范围之内[1]。对于温度而言,现有的空调系统能够完全满足库房的温度控制需要,而馆藏系统的湿度则需要通过除湿机及加湿机来调节。湿度的控制是一个大滞后的环节,常规的控制算法,很难达到理想的控制效果,且馆藏系统的湿度模型很难建立,且空调在运行过程中会使空气干燥,使房间湿度降低,对湿度的控制产生影响[2]。文献[3]设计了图书馆智能温湿度控制系统,该系统中主要对历史的温度与湿度进行采集计算,建立温度与湿度之间的关系,进而实现温湿度PID控制。……

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