铝板带材厚度和板形设定补偿解耦控制策略

Compensating Decoupling Strategy of Setting Strip Gauge and Flatness of Aluminous Board Timber

在铝薄板带材冷轧生产过程中,板厚控制和板形控制本质上都是对轧制过程中有载辊缝的控制,两者存在很强的耦合关系。针对板厚板形控制系统存在耦合问题,提出板厚板形解耦设定补偿思想,包括预设定补偿控制和自适应穿带解耦控制。前者是解决设定过程中弯辊力对板厚板形耦合系统的影响;后者是针对穿带过程中轧制力预报不精确的板厚板形解耦方法。仿真结果及现场应用表明,解耦设定补偿提高了板厚板形的控制精度,满足了铝带板质量综合控制的要求。

The gauge control and flatness control are both master of the aperture of cold mill during the process of aluminous timber rolling, and intense coupling connection exists in both of their control loops. The decoupling compensating of setting and adaptive decoupling strategy is presented to the coupling problem existing in the gauge and flatness control system. The problem of influence of the pressure of bend roller upon the decoupling system of gauge and flatness is solved. The latter part of the strategy is a kind of decoupling method that is solving the imprecision of rolling pressure when the strip is through cold mill. The simulation result and field application show that the method can improve precision of gauge and flatness control and meet the requirements of the aluminum plate quality synthetic controlling.