Self-excited vibration problems of maglev vehicle-bridge interaction system
来源期刊：中南大学学报(英文版)2014年第11期
论文作者：LI Jin-hui(李金辉) LI Jie(李杰) ZHOU Dan-feng(周丹峰) YU Pei-chang(余佩倡)
文章页码：4184 - 4192
Key words：maglev; vehicle-bridge interaction system; self-excited vibration; energy
Abstract: The self-excited vibration problems of maglev vehicle-bridge interaction system were addressed, which greatly degrades the stability of the levitation control, decreases the ride comfort, and restricts the cost of the whole system. Firstly, the coupled model containing the quintessential parts was built, and the mechanism of self-excited vibration was explained in terms of energy transmission from levitation system to bridge. Then, the influences of the parameters of the widely used integral-type proportion and derivation (PD) controller and the delay of signals on the stability of the interaction system were analyzed. The result shows that the integral-type PD control is a nonoptimal approach to solve the self-excited vibration completely. Furthermore, the differential-type PD controller can guarantee the passivity of levitation system at full band. However, the differentiation of levitation gap should be filtered by a low-pass filter due to noise of gap differentiation. The analysis indicates that a well tuned low-pass filter can still keep the coupled system stable.
LI Jin-hui(李金辉), LI Jie(李杰), ZHOU Dan-feng(周丹峰), YU Pei-chang(余佩倡)
(College of Mechatronics Engineering and Automation, National University of Defense Technology,
Changsha 410073, China)
Abstract:The self-excited vibration problems of maglev vehicle-bridge interaction system were addressed, which greatly degrades the stability of the levitation control, decreases the ride comfort, and restricts the cost of the whole system. Firstly, the coupled model containing the quintessential parts was built, and the mechanism of self-excited vibration was explained in terms of energy transmission from levitation system to bridge. Then, the influences of the parameters of the widely used integral-type proportion and derivation (PD) controller and the delay of signals on the stability of the interaction system were analyzed. The result shows that the integral-type PD control is a nonoptimal approach to solve the self-excited vibration completely. Furthermore, the differential-type PD controller can guarantee the passivity of levitation system at full band. However, the differentiation of levitation gap should be filtered by a low-pass filter due to noise of gap differentiation. The analysis indicates that a well tuned low-pass filter can still keep the coupled system stable.
Key words:maglev; vehicle-bridge interaction system; self-excited vibration; energy
