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.
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Foundation item: Projects(60404003, 11202230) supported by the National Natural Science Foundation of China
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Li, Jh., Li, J., Zhou, Df. et al. Self-excited vibration problems of maglev vehicle-bridge interaction system. J. Cent. South Univ. 21, 4184–4192 (2014). https://doi.org/10.1007/s11771-014-2414-5
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DOI: https://doi.org/10.1007/s11771-014-2414-5