基于专家PID的电阻炉温度控制策略

Temperature Control Strategy of Resistance Furnace Based on Expert PID

电阻炉在工业生产中的作用非常关键,其温度控制效果对工件的质量、加热效果影响较大,因此对温度精确控制要求较高。常规PID较容易受限于局部最优,PID优化参数能力较弱,针对常规PID算法不能对电阻炉进行有效的温度精确控制,提出了专家PID算法,优化改进变参数的控制器,对电阻炉进行精准控制,并通过MATLAB仿真得出该算法的几个优点:精度高、鲁棒性强、无超调、响应时间短、快速局部搜索能力。同时,以C51单片机为核心控制技术,设计基于改进的专家系统PID控制算法的温度控制器来实现产品性能的要求。

Resistance furnace is very important in industrial production. Its temperature control effect has a great influence on the quality of the workpiece and the heating effect. Therefore, we have a high demand for accurate temperature control. The conventional PID is easily limited by the local optimal, which is weak in the optimization of the PID parameter. As the conventional PID algorithm can not effectively control the temperature of the resistor furnace, the expert PID algorithm is proposed to optimize the controller of the modified parameters, and the resistance furnace is precisely controlled. Through MATLAB simulation, several advantages of the algorithm are obtained such as high precision, strong robustness, no overtone, short response time, and fast local search ability. At the same time, using C51 microcontroller as the core control technology, this paper designs the temperature controller based on the improved expert system PID control algorithm to achieve the product performance requirements.