Reduced-order robust tilt control design for high-speed railway vehicles

This paper presents a study of model reduction techniques, as well as controller reduction via closed-loop considerations in designing robust tilt controllers to improve the curving performance of high speed railway vehicles. The schemes make exclusive use of local practical signal measurements, i.e. sensors mounted on the current passenger coach. The fundamental problem related with straightforward classical nulling-feedback control is presented, while the commercially-used command-driven with precedence scheme is introduced. Simulation results and an appropriately defined tilt control system assessment method are employed for illustrating the efficacy of the reduced-order robust tilt controller.