甲醇精馏塔温控系统滑模变结构控制仿真

摘要

Considering the nonlinearity, long time delay and mathematical model's difficulty in exact description, a SMVS (sliding mode variable structure) control algorithm-based temperature control system was designed, which has measured practical temperatures compared with the preset target temperatures and makes use of SMVS control algorithm to regulate the actual temperatures.Adopting Simulink platform in Matlab to simulate the temperature control system and employing GUI interface design and comparing the setting and measured temperatures to show that, within the permissible error range, the real-time SMVS temperature control outperforms the conventional PID control.%针对甲醇精馏塔具有非线性、大时滞,数学模型难以准确描述的特点,设计了一种滑模变结构控制算法的温度控制系统.该系统通过对不断测量的实际温度值与目标温度值进行比较,利用滑模变结构控制算法对实际温度进行控制调节.采用Matlab软件中的Simulink平台实现温度控制系统的仿真.并且利用GUI界面设计,通过设定不同温度值进行比较.实验结果表明:在误差允许范围内,滑模变结构实时温度控制明显优于传统PID 控制.