摘要
轧机在轧制过程中,主传动系统会因扭转自激振动产生混沌行为。建立了具有边界振动和间隙的轧机主传动系统自激振动模型,用分岔图和Poincare截面分析了扭转自激振动的混沌特性。基于趋近率思想,设计了非奇异Terminal滑模控制器,该控制器在参数满足一定条件时避免了奇异问题,同时,提高了趋近滑模面的速度,缩短了调整时间。将设计的控制器用于轧机主传动振动系统的控制,实现了该系统的有限时间稳定。仿真结果表明了该方法的有效性。
In the rolling process,there is chaos in the main drive system due to self-excited vibration.A self excited vibration model of rolling mill system with oscillating boundaries and clearances was established.The chaos of rolling mill system was analyzed through bifurcation diagrams and Poincare section.Then a new non-singular Terminal sliding mode controller was designed based on the reaching law method.The singular problem was avoided,the convergence rate was improved and the adjustment time was minished via the proposed controller.The designed controller was applied to the self-excited vibration in mill main drive system and the stability in finite time was realized.Simulation results show the effectiveness of the controller.
作者
张巍巍
师洪涛
王福星
胡庆军
ZHANG Weiwei;SHI Hongtao;WANG Fuxing;HU Qingjun(School of Electric&Information Engineering,North Minzu University,Yinchuan 750000,Ningxia,China;Tianjin Research Institute of Electric Science Co.,Ltd.,Tianjin 300180,China)
出处
《电气传动》
2021年第23期33-38,共6页
Electric Drive
基金
北方民族大学2019年重点科研项目(2019KJ39)
宁夏青年科技人才托举工程资助项目(TJGC2019017)
宁夏自然科学基金(2019AAC03118)
宁夏重点研发计划资助项目(2018BEB04009)。
关键词
自激振动
TERMINAL滑模
指数趋近律
self-excited vibration
Terminal sliding mode(TSM)
exponential approach law(EAL)
