复合控制器及其在连消中的应用

由于常规PID控制方式对非线性、大滞后对象难以进行有效的控制,模糊控制具有很好的动态特性,所以结合常规PID和模糊控制的优势设计了参数自调整Fuzzy-PID复合控制器。通过模糊推理实现参数自调整,以使控制器能够适应不同对象和对象的不同状态。采用模糊推理的方法完成两种控制方式的平稳过渡。对某制药厂连消温度的控制表明,该控制器可以大幅度提高控制精度和缩短系统响应时间,从而避免了染菌事故的发生,提高了发酵单位。

Combined Controller and Its Application in the Continuous Sterilization Process

The conventional PID control is hard to implement with effectiveness for the nonlinear object with time delay,and fuzzy control has better dynamic characteristics,so the parameter self-tuning fuzzy-PID combined controller is proposed by combining the advantages of conventional PID and fuzzy control.The parameter self-tuning realized by fuzzy inference can make the controller adapt to different control objects and various states.The method of fuzzy inference realizes smooth transitions of the controller during switching.The result of continuous sterilization temperature control in a pharmaceutical factory shows that this controller can improve control accuracy and shorten the system response time,avoid occurrence of bacteria contaminating and increase fermentation unit.