Multibody models for quantifying and analysing railway odometry system accuracy

To determine the position and the speed of a railway vehicles, signalling equipment relies on odometry system. The next challenges in the railway signalling industry (absolute positioning, automatic train operation, . . . ) have led to the use of new sensor technologies within this ecosystem, sensors that are highly dependent on the movement of the vehicle in the three directions (IMU, wheel sensors, GNSS). This extended abstract presents the elaboration of a multibody model of railway vehicle to quantify and analyse the behaviour of the odometry system. The current model allows to highlight the impact of the dynamic (rolling) effects on the behaviour of an odometry system. As a conclusion, the extended abstract highlights the next improvements targeted for the conference (i.e., better sensors, traction and braking systems simulation).