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PID控制在工业控制中应用广泛,但在实际的工业生产中PID参数需要人工在线多次整定,耗时长、能耗高、效率低;整定过程影响产品质量、甚至不出产品。在用阶跃响应曲线法研究真空冶炼炉温度模型的基础上,设计了一种高精度参数模糊自整定PID控制器。经一次整定可获得较理想的PID参数。从2009年投入使用至今,结果表明:上升时间由原系统的80缩短到45 min;最大偏差减少了3/4;稳态误差由原系统的1.5%~2%降低到0.5%以下。PID参数整定克服了人为因素影响;参数整定及控制时间大为缩短;降低了能耗,提高了生产效率,提高了控制精度,保证了产品质量。
PID control is widely used in industrial control. However, PID parameters need to be set manually online for many times in actual industrial production, which consumes long time, high energy consumption and low efficiency. The whole process affects the quality of the product, even without the product. On the basis of studying the temperature model of vacuum smelting furnace by step response curve method, a high precision parameter fuzzy self-tuning PID controller is designed. After a tuning can be more ideal PID parameters. Since 2009, the results show that the rise time is shortened from 80 to 45 min in the original system, the maximum deviation is reduced by 3/4, and the steady-state error is reduced from 1.5% to 2% of the original system to less than 0.5%. PID parameter tuning to overcome the impact of human factors; parameter setting and control time is greatly reduced; reduce energy consumption, improve production efficiency, improve control accuracy and ensure product quality.