具有不确定性的轧机主传动系统机电振动H∞控制研究  

Research on Electromechanical Vibration H_∞ Control of Main Drive System of Rolling Mill Considering Uncertain Parameters

作　　者：郭香云[1] 张瑞成[1] 陈至坤[1] 童朝南[2] 

机构地区：[1]河北理工大学计算机与自动控制学院,河北唐山063009 [2]北京科技大学信息工程学院,北京100083

出　　处：《电气传动》2008年第4期30-34,共5页Electric Drive

摘　　要：轧机驱动电机与轧辊间采用长轴连接,连接轴刚度有限,因此在带材高速轧制时,常规电流、转速双闭环控制易产生机电振动和断带现象。为克服该缺陷,针对具有参数摄动、负载扰动和电枢反应引起的非线性不确定性的直流驱动轧机主传动系统控制问题,基于H∞理论设计了轧机主传动系统的鲁棒状态反馈控制器,并利用两自由度控制方法设计了主传动系统的前馈补偿控制器。仿真研究结果表明,该方法不仅有效抑制了轧机主传动系统的机电振动,而且减小了轧制负载扰动引起的动态速降。In rolling mill, the distance between drive motor and roll is long, the rigid of its spindle is limited. The normal control of speed and current closed loop often lead to the phenomenon of electromechanical vibration and broken strip. In order to solve the problem, the main drive system of rolling mill control problem was transformed into a standard H∞ design problem by constructing a expanded controlled plant for the parameters time-varying,load disturbance and the DC motor that has the nonlinearity uncertainty brought by armature reaction. Then the states feedback robust controller of the main drive system was designed, and the feedforward compensatory controller was designed by using the two-degrees-of-freedom method. The simulation result shows that this controller not only effectively suppresses the electromechanical vibration of the main drive system, but also reduce the dynamic soeed fall brought bv load disturbance.

关 键 词：轧机 主传动 机电振动 鲁棒控制 

分 类 号：TP278[自动化与计算机技术—检测技术与自动化装置]