A Combined Method of High Precision Temperature Control
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摘要: 介绍了一种用于高精度温度控制的复合方法及其在恒温槽上的成功应用.该方法集Fuzzy逻辑和专家式智能PID(比例、积分、微分)控制于一体,充分运用了专家的人工调节经验和PID控制的定量调节特性,较好地满足了高精度控温中的高精度与快速性要求.采用了简单新颖的PID参数在线修正和温度变化预报方法,易于实现.用于恒温槽时控制精度优于0.01℃.实践证明该方法在高精度控温中具有良好的控制效果.Abstract: A combined method of high precision temperature control and its application in a constant temperature trough were presented. Combining Fuzzy logic with intelligent PID control of expert type, the method fully utilizes the expert's experience of manual manipulating and quantitative operating feature of PID control. Therefore, it could meet the precision and adjusting time requirements in high precision temperature control. Moreover, a novel and simple model to modify PID parameters and a method to predict the change of temperature on-line were introduced, which are easy to implement. When used in a constant temperature trough, the control accuracy of the combined method is even smaller than 0.01℃.
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Key words:
- temperature control /
- fuzzy logic /
- PID control /
- intelligent control /
- high precision control
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