石油化工过程中卧罐液位控制系统算法研究

The research of Petrochemical industry lie in the process of tank liquid level control system algorithm

针对石油化工过程常用的卧罐,采用机理建模方法,建立了其非线性数学模型,为控制算法的设计打下基础。并采用理论计算数据和模型仿真数据对比验证了机理模型。在卧罐液位上升阶段、稳定阶段、受干扰阶段,基于非线性思想设计了三个阶段的非线性控制算法,进行了稳定性证明和可行性分析,并将其仿真控制效果和PID算法进行了对比,结果证明了非线性控制算法在卧罐液位控制系统中的优越性。

For horizontal tank used in petrochemical process ,using mechanism modeling method, setted it＇ s nonlinear mathematical model, lay the foundation for the design of control algorithm. And the comparison between calculated and model simulation data validate the mechanism model.In the stage of horizontal tank＇ s Liquid level rising,stable, interference, using nonlinear thinking to design the nonlinear control algorithm based on the three stage, and conduct its stability proof and feasibility analysis. And simulation control effect and PID algorithm were compared, the results prove the superiority of the nonlinear control algorithm in the horizontal tank level control system.