Suppressing Vertical Vibration in Railway Vehicles through Air Spring Damping Control

Vibration mitigation of railway bridges using adaptive damping control

In this paper, the advantage of an adaptive damping system is presented. A damper with variable stiffness is tuned based on estimates of the real-time frequency response, facilitating optimal vibration mitigation. The performance of the developed routines is investigated on an existing tied arch railway bridge. Based on previous field measurements, resonant behaviour of several hangers was foun...

Considerations on the Excitation Mechanism of the Vertical Vibration Symmetrical and Antisymmetrical Modes in Railway Vehicles

The railway vehicles are complex oscillator systems featuring specific vibration characteristics. The symmetrical and antisymmetrical vibration modes represent a property of the railway vehicle vibrations, due to its symmetry in construction. The paper describes the excitation mechanism of the symmetrical and antisymmetrical modes in a vertical plan of a railway vehicle on a track with irregula...

Control for Railway Vehicles

Automatic Slip Control for Railway Vehicles

In the railway industry, slip control has always been essential due to the low friction between the wheels and the rail. In this master’s thesis we have gathered several slip control methods and evaluated them. These evaluations were performed in Matlab-Simulink on a slip process model of a railway vehicle. The objective with these evaluations were to show advantages and disadvantages with the ...

Advanced Control Strategies for Tilting Railway Vehicles

This paper presents the findings of the first stage of a fundamental study of the tilt control problem. A tilting railway vehicle is described via appropriate modelling and a frequency domain analysis illustrates the problems associated with straightforward feedback control. A Kalman-Bucy filter is developed based on 3 inertial measurements (body lateral acceleration, roll and yaw rate) to prov...