【摘要】 针对吗啉精馏过程塔釜温度易受压力波动干扰问题，研究了串级PID控制方案。通过对现场生产数据进行系统辨识获得被控对象传递函数，利用Simulink搭建仿真模型，验证了串级PID控制方案的可行性，基于S7-300PLC设计了塔釜温度串级控制系统。该控制方案实现简单、调试方便，易于在PLC系统中实施，具有良好的推广价值。更多还原

【Abstract】 In view of the problem that the tower bottoms temperature in the morpholine distillation process is easily disturbed by pressure fluctuations, a study on a cascaded PID control scheme was conducted.The controlled object transfer function was obtained through system identification of on-site production data.A simulation model was constructed using Simulink to validate the feasibility of the cascaded PID control scheme.Subsequently, a cascaded control system for kettle temperature was designed based on the S7-300 PLC.This control scheme is characterized by simplicity, ease of debugging, and straightforward implementation within the PLC system.It holds significant potential for widespread application in view of its favorable attributes.更多还原