Effects and Compensations of Time Delay on the Dynamic Stiffness and Damping Coefficients of Active Magnetic Bearings

摘要：

Aiming at the problem of small time delay in the control system of an active magnetic bearing (AMB), the direct approach is applied to study the effects and compensation of time delay on the dynamic stiffness and damping coefficients of active magnetic bearings. Second-derivative feedback is used to compensate time delay effects, and performance of the controller has been verified. The results indicate that the time delay mainly affects the dynamic performance of AMB system in the upper frequency band, and results in the increasing of bearing dynamic stiffness coefficient and the decreasing of bearing dynamic damping coefficient with the high-speed AMB, respectively. The relationship between second-derivative and bearing performance is investigated, and it is shown that the time delay effects on the bearing properties may be effectively compensated by using the second-derivative feedback.

关键词： Active Magnetic Bearings Time Delay Effect Time Delay Compensation

作者: Su Wenjun Geng Haipeng Liu Heng Yu Lie

作者单位: Institute of Mechatronics and Information Systems, Key Laboratory of Ministry of Education for Strength and Vibration, Xi’an Jiaotong University, Xi’an, 710049, China

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Magnetic Bearings(第十二届国际磁悬浮轴承学术会议)

会议地点: 武汉

会议语种:英文

页码: 228-234

在线出版日期: 2010-08-22（万方平台首次上网日期，不代表论文的发表时间）