【摘要】 针对焦炉温度大惯性、纯滞后、非线性和时变性等特点,结合PID和模糊控制两者的优点,提出了一种模糊自整定PID控制方法。对模糊自整定PID算法进行了理论分析,对焦炉生产的简化模型做了仿真研究。结果表明,采用模糊自整定PID控制,系统的调节时间缩短,响应速度加快,抗干扰能力和适应参数变化的能力都优于常规PID控制,具有更好的动态特性和稳定性,有效减少了炉温的波动。更多还原

【Abstract】 Combining both the advantages of PID controller and fuzzy control,a fuzzy self-tuning PID controller is proposed for the characteristics of Single crystal growth furnace,such as big inertia,pure time-delay,nonlinearity and time-varying.The algorithm of fuzzy self-tuning PID control is analyzed theoretically and the simplified production model of Single crystal growth furnace is simulated.The results showed that such a fuzzy self-tuning PID controller has the advantages of shortening the time for system readjustment,quickening the response speed,higher anti-interference ability and adaptability to parameters’changing than conventional PID controller and better dynamic property/stability.All these can reduce effectively the fluctuation of temperature.更多还原