活套关联系统建模及滚动时域控制

摘要

本文分析了热连轧活套系统下游机架轧制速度对活套张力系统的影响和热连轧多机架协同工作的特性,建立了活套关联系统模型;基于分散控制思想,为每个活套系统单独设计控制器.对于每一个活套子系统,活套高度和张力是强耦合系统,本文采用一类基于滚动时域优化原理的多路控制策略,在每个周期内顺序求解活套高度和张力子系统的控制律后及时更新系统,从H∞观点出发,将解耦问题转化为干扰抑制和多目标优化问题.仿真结果证实了该方法具有良好的解耦效果和控制特性.%By investigate how the rolling speed of downstream stands affects on the looper tension system, and analyzing the characteristics of hot strip stands working in cooperation, we build the model for the looper interconnected system, and develop separate controller for each looper system based on distribution control. To deal with the strong coupling between the height and tension in a looper system, we employ the multiplex control strategy based on the receding horizon theory. After all the subsystem-controllers are obtained sequentially in one cycle, the system is updated in time. The decoupling problem is transformed into a compound problem of disturbance rejection and comprehensive optimization, according to the H-infinity control theory. Simulation results show the effectiveness of this strategy in improving the decoupling effect and the control performance.