PLC 模糊PID 控制系统在培养基发酵温度控制中的应用

 为解决培养基二次发酵存在成品率低、产品同一性差、自动化水平低、能耗高及发酵隧道内温度控制的复杂性等问题,提出了基于PLC 的计算机控制系统,应用PLC 实现了计算机对发酵过程的数据采集和实时控制。该系统采用模糊PID 控制算法,其中模糊控制器和PID 调节器都通过PLC 实现,保留了PLC 控制系统抗干扰能力强、控制灵活、可靠等特点,提高了控制系统的智能化水平和精度。实际应用表明,该系统能有效控制培养基二次发酵隧道内的温度,提高设备自动化水平、产品的品质,减少人力损耗和成本。

Application of PLC Fuzzy PID Control System to Medium Fermentation Temperature Control

This paper aims to solve the problems of the existence of secondary fermentation medium low yield, the poor product identity, the low level of automation, the high energy consumption and many other urgent problems, as well as the complexity of the secondary fermentation medium temperature control inside the tunnel by proposing a computer control system based on PLC, with the computer data acquisition and the real-time control of fermentation process. Fuzzy PID control algorithm is adopted in the system, the fuzzy controller and PID adjustor are realized by PLC, which not only has the agile, reliable peculiarity and the ability of antijamming of a PLC control system, but also improves considerably the intelligence level and the control precision of the control system. The practice results show that the system can effectively control the secondary fermentation medium temperature inside the tunnel, greatly improve the level of automation, and the quality of the products, reduce the labor intensity and the human losses and costs, reduce the energy consumption, with good economic and social benefits.