摘要
为提高主动电磁轴承离散滑模控制系统的控制精度,设计了一种改进自适应离散滑模控制方法。采用切换增益自适应方法迫使滑模切换区渐进收缩于原点以降低滑模运动中后期抖振振幅,采用边界层自适应连续函数替代传统符号函数以降低滑模运动前期较大振幅,且保证滑模运动各阶段具有良好的鲁棒性。经启浮工况和位置跟踪工况仿真试验验证,设计的改进自适应离散滑模控制方法使系统具有较低的抖振、较高的控制精度以及良好的鲁棒性。
In order to improve the control accuracy of the discrete sliding mode control system for active electromagnetic bearings,an improved adaptive discrete sliding mode control method is designed.The adaptive switching gain method is used to force the sliding mode switching area to shrink asymptotically at the origin to reduce the jitter amplitude in the middle and late stages of the sliding mode motion.The boundary layer adaptive continuous function is used to replace the traditional symbol function to reduce the large amplitude in the early stage of sliding mode motion,and ensure that each stage of sliding mode motion has good robustness.The improved adaptive discrete sliding mode control method is validated by the simulation experiments in the start-floating and position-tracking conditions,and the system has low jitter,high control accuracy and good robustness.
作者
冯超
孙宾宾
张铁柱
武晓
FENG Chao;SUN Binbin;ZHANG Tiezhu;WU Xiao(College of Traffic and Vehicle Engineering,Shandong University of Technology,Zibo 255000,China)
出处
《电工技术》
2023年第4期15-19,共5页
Electric Engineering
基金
山东省重点研发计划(国际科技合作)项目(编号2019GHZ016)
中国博士后基金面上项目(一等资助)(编号2020M680091)
山东省博士后创新项目(编号202003042)。
关键词
主动电磁轴承
切换增益自适应
边界层自适应
离散滑模
active electromagnetic bearing
switching gain adaption
boundary layer adaptive
discrete slipform
