板带轧机单独传动弹性系统多电机同步控制  

The Multi-Motor Synchronous Control for the Separate Drive Elastic Connection System of the Strip Rolling Mill

作　　者：张瑞成 高峰 ZHANG Rui-cheng;GAO Feng(College of Electrical Engineering,North China University of Science and Technology,Hebei Tangshan 063210,China)

机构地区：[1]华北理工大学电气工程学院,河北唐山063210

出　　处：《机械设计与制造》2021年第2期227-231,236,共6页Machinery Design & Manufacture

基　　金：河北省自然科学基金资助项目(F2018209201);华北理工大学2018年研究生创新项目(2018S08)。

摘　　要：轧辊单独传动系统需要实现上、下拖动电机转速同步,为解决弹性连接引起的扭振与轧制负载扰动会导致同步控制性能降低的问题,建立轧辊单独传动弹性系统模型,将状态反馈控制与现有交叉耦合同步控制策略相结合,用扩张状态观测器重构系统状态量和综合扰动,实现状态反馈控制和扰动前馈补偿,以改善弹性轴连接情况下同步控制系统的动态性能与抗扰动能力。仿真结果表明,状态反馈控制的加入对抑制扭振效果明显,受轧制负荷扰动时动态速降减少近2/3,并且启动时能够快速的使同步误差归零,同步误差归零时间减少77%,同步误差在受扰动时降低近84.6%,同步性能得到明显改善。The separate drive system of the rolling mill needs to synchronize the rotational speeds of the upper and lower drag motors.The torsional vibration caused by the elastic connection and the rolling load disturbance will lead to the decrease of the synchronous control performance.In order to solve that problem,the separate drive elastic system of the rolling mill is established,and then,combined with state feedback control and existing cross-coupling synchronous control strategy.System state variables and integrated disturbances are estimated by the extended state observer to implement state feedback control and disturbance feedforward compensation to improve the dynamic performance and immunity of the synchronous control system with elastic shaft connections.The simulation results show that the state feedback control has obvious effect on suppressing torsional vibration.The dynamic speed drop is reduced by nearly 2/3 when the rolling load is disturbed,and the synchronization error can be quickly reset to zero when starting,the time of error return to zero is reduced 77%,the synchronization error is reduced by nearly 84.6%when disturbed.The synchronization performance is significantly improved.

关 键 词：轧机单独传动弹性连接系统 交叉耦合同步控制 扭振 扩张状态观测器 状态反馈控制 

分 类 号：TH16[机械工程—机械制造及自动化] TH113[机械工程—机械设计及理论]