Application of predictive Fuzzy-PID in center air adjusting control system
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摘要: 电加热常作为中央空调的末端设备置于被调节房间风道入口处,微调加热以提高温度控制精度,为此提出一种电加热温度控制方法,采用预估Fuzzy-PID复合控制算法,通过对加热功率的调节进行闭环控制,实现控制点温度的稳定控制.新的控制算法结合了smith预估控制、Fuzzy和PID控制器的优点.在MATLAB环境中仿真预估Fuzzy-PID控制中央空调末端电加热,结果表明该控制方法能提高温度稳定性并降低能耗,控制精度达到±0.1℃.该控制方法同样适用于其它含有电加热元件的场合.Abstract: The electrical heating element is often used in center air adjusting system. It is installed in the end of air supply duct system and can improve the control precision of temperature by combining with other elements in center air adjusting system. The temperature control method of electrical heating was presented, which adopted predictive Fuzzy-PID control arithmetic and realized steadytemperature control. The smith predictor, Fuzzy controller and PID controller were integrated into the new control method. The predictive Fuzzy-PID controllingto temperature in center air adjusting system was simulated in MATLAB. Its results indicate that the control method, whose control precision reaches ±0.1℃, can improve the temperature stability and reduce the energy consume. This control method could be used in other similar instance with electrical heating element.
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Key words:
- center air adjusting /
- temperature control /
- Fuzzy\ /
- PID control /
- smith predictor /
- time delay
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