Negotiating curves at high speeds is desired. For the purpose of improving the ride quality on a curved track, an active tilting system fro railway cars is studied theoretically. This system is composed of a curve detector, curve data memories, microcomputers for making control signals, feedback circuits of swing angles, and air servo mechanisms. With the dynamic model of this system, after the kinematic equations are led in several control modes, the optimization in simulation analysis and the comparison between measured and calculated waves are described.
