Abstract
This paper presents a method to suppress the vertical bending vibration of electric railcar by using traction motor. Dynamics of the truck with parallel cardan drives can be controlled by torque of the traction motors. This paper proposes a control scheme to reduce vertical vibration of truck frame by the traction motor torques, and shows that they can decrease vertical bending vibrations of carbody. The motor torques are added with the traction torques of the control scheme in reverse phase for two traction motors of a truck, and they are designed based on the sky-hook control theory. The simulations show that the control scheme using traction motor torque improves ride quality level about 9 dB at the center of carbody.
