中国机械工程Issue(21)：2921-2926,2927,7.DOI:10.3969/j.issn.1004-132X.2013.21.016
数控机床用磁悬浮系统非线性时变滑模变结构控制
Nonlinear Time-varying Sliding Mode Control for NC Machine Magnetic Levitation Systems
摘要
Abstract
In order to reach high-precision air gap of electromagnetic levitation grip a novel time-varying sliding mode was proposed.At first,a new exponential time-varying sliding surface was designed and guaranteed the sliding mode occurrence from beginning to end.The global robustness of parameter perturbation and external disturbance was realized.After that a control law of time-var-ying sliding mode was designed based on the sliding surface of exponential term and its stability was proved by the Lyapunov stability principle.Simulation results demonstrate that the time-varying term is introduced to improve the convergence speed of the sliding surface in the context of ensuring global stability of the system and to eliminate system chattering effectively.关键词
磁悬浮系统/非线性系统/时变滑模/悬浮气隙Key words
electromagnetic levitation system/nonlinear system/time-varying sliding mode/levitation gap分类
信息技术与安全科学引用本文复制引用
刘春芳,张健..数控机床用磁悬浮系统非线性时变滑模变结构控制[J].中国机械工程,2013,(21):2921-2926,2927,7.基金项目
国家自然科学基金资助项目(50805098) （50805098）
