磁気浮上式鉄道の軌道不整同定に関する基礎研究

抄録

Primary study on identifying deviations in the alignment of ground coils (ground coil irregularities) for magnetically levitated systems is conducted. The ultimate goal of this study is to introduce an active suspension system with preview in the future. First, the amount of irregular forces caused by twenty four types of ground coil irregularities is calculated respectively. The calculation results clarify that the irregular forces are complexly caused by various combinations of ground coil irregularities, and this shows that identifying ground coil irregularities by vibrations of the moving vehicles is appropriate toward the preview vibration control. Next, this paper refines an identifying method, which is originally developed for conventional wheel-on-rail systems, utilizing car body acceleration and Karman filter. To exclude a harmful influence originated by the spatial filter effects of onboard magnets, application of an impulse response of a particle model, instead of a rigid body model, and correction using the second order system compensational filter are proposed. Numerical simulation results show that the proposed method enhances the identification accuracy and widens the band of frequencies in which the irregularities can be identified. Finally, fundamental experiments are conducted in the test stand which can simulate vibrations of the moving vehicles in a range of frequencies sensitive to ride quality. The ground coil irregularities in the intended band of frequencies are experimentally identified with satisfactory accuracy by the proposed method, and the experiment technically enhanced the prospect of identifying the ground coil irregularities by car body acceleration.