Coupling vibration analysis of high-speed maglev train-viaduct systems with control loop failure

The risk of failure of the control loop can occur when a high-speed maglev train runs on viaduct. Meanwhile, the failure of the levitation magnets which balances the gravity of the maglev train could cause the train collision with track. To study the dynamic response of the train and the viaduct when the levitation magnet control loop failure occurs, a high-speed maglev train-viaduct coupling model, which includes a maglev controller fitted by measured force-gap data and considers the actual structure of train and viaduct, is established. Then the accuracy and effectiveness of the established approach are validated by comparing the computed dynamic responses and frequencies with the measurement results. After that, the dynamic responses of maglev train and viaduct are discussed under normal operation and control loop failures, and the most disadvantageous combination of control loop failures is obtained. The results show that when a single control loop fails, it only has a great influence on the failed electromagnet, and the maglev response of adjacent electromagnets has no obvious change and no collision occurs. But there is a risk of rail collisions when the dual control loop fails.

Automated summary

The failure of the control loop in a high-speed maglev train running on a viaduct can lead to collisions between the train and the track due to the failure of the levitation magnets. A model that couples the maglev train and the viaduct is established to study the dynamic response under control loop failures, and the most disadvantageous combination of failures is obtained. The results show that single control loop failures do not lead to collisions, but there is a risk of rail collisions when both control loops fail.