Since the temperature system of humidifier is a large time-delay nonlinear system, the normal PID control can not achieve the desired performance.

然而加湿器的温度系统是一个大时滞非线性系统，采用常规的PID控制无法实现有效的控制。

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This paper analyzes the properties of temperature control system of heat treatment electric furnace, showing that a normal controller does not meet the needs of high control accuracy.

分析了热处理电阻炉温度控制的对象特性，说明了常规控制器不能满足高精度控制的原因。

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