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聚丙烯生产过程受内部放热反应及入料温度等影响,具有时滞、大惯性和动态不确定的特点,基于离散自抗扰控制技术(ADRC-Active Disturbance Rejection Control),通过参数整定跟踪微分器和扩张状态观测器,合理安排过渡过程并估计扰动,利用误差信号设计非线性反馈控制律,以实现聚丙烯反应釜的温度控制。最后借助MPCE实验装置,采用SIMATIC PCS 7控制器进行温度控制及干扰和变负荷实验,不同工况下的实验结果表明该方法具有很好的适应性和鲁棒性,且同等工况下的动态性能优于传统PID控制方法。
Polypropylene production process is affected by internal exothermic reaction and feed temperature, and has the characteristics of time delay, large inertia and dynamic uncertainty. Based on ADRC-Active Disturbance Rejection Control, And expansion state observer, the transition process is reasonably arranged and the disturbance is estimated. The error signal is used to design the nonlinear feedback control law to realize the temperature control of polypropylene reactor. Finally, with MPCE experimental device, SIMATIC PCS 7 controller for temperature control and disturbance and variable load experiments under different conditions experimental results show that the method has good adaptability and robustness, and dynamic under the same conditions Performance is superior to traditional PID control methods.