Abstract
With the increasing of the train speed, the dynamic performance of the train continues to deteriorate. Therefore, how to ensure the dynamic performance of trains including the ride comfort and stability is an important issue for engineers. In this paper, how to ensure the ride comfort of high speed trains is researched. The semi-active control technology of secondary lateral dampers is used to improve the ride comfort of the train. Firstly, a full-scale high speed train model is established by using the Universal Mechanism(UM) software, and the traditional LQR(Linear quadratic regulator) algorithm based on a 9 degrees of freedom(dof) model of high speed trains is used to calculate the active control force. Secondly, the magnetorheological(MR) damper model is used to track the control force through a tracking force controller designed in this paper, and then the MR damping force is fed back to the full-scale vehicle model to form a closed-loop system. Finally, the semi-active simulations is performed. The simulation and comparison results show that the semi-active control based on the LQR method can restrain the lateral vibration of the car body and improve the ride comfort of the train obviously. Although it deteriorates the running safety a little, it is still within the allowable range.
Published Version
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