The resistor furnace of magnetic stirrer with characteristics of large inertia,nonlinear and difficult to obtain an accurate mathematical model.In order to reduce overshoot,steady-state errors and improve control accuracy.Based on temperature-current cascade control temperature control method for magnetic stirrer based on fuzzy PID is proposed.By fuzzy input and output,fuzzy rules are used for reasoning,and the output of the controller is adjusted according to the real-time temperature deviation and change rate,so as to realize faster response and reduce the overshoot.The proportional,integral and differential parts of PID controller can also adjust the system accurately,improving the accuracy of temperature control.Experiments shows that when the temperature control range is between 50℃to 350℃,the steady-state errors of the system is less than±1℃,and with little overshoot,which can meet the demand of temperature control in magnetic stirrer.
关键词
温度控制/模糊PID/串级控制/电阻炉盘
Key words
temperature control/fuzzy PID/cascade control/resistor furnace
维普
万方数据