Railways Vehicle dynamics Low adhesion Kalman filtering Creep force
Taylor & Francis
HUBBARD, P. et al., 2014. Models for estimation of creep forces in the wheel/rail contact under varying adhesion levels. Vehicle System Dynamics, 52 (Supplement), pp.370-386.
Areas of extremely low adhesion between the wheel and rail can cause critical problems in traction and braking that can manifest in issues such as signals being passed at danger. There is currently a lack of real-time information regarding the state and location of low-adhesion areas across rail networks. The study presented here examines the scientific challenges of understanding the change in vehicle running dynamics with variations in adhesion using the latest thinking of adhesion at micro-slip. This understanding supports the generation of suitable low-order dynamic models for use with a model-based estimator that infers adhesion levels in the wheel/rail contact using signals from modest-cost sensors that could be fitted to in-service vehicles. This paper presents verification of this technique by using simulated inertial measurement produced from a high-fidelity multibody simulation in a series of ‘blind’ tests.
This is an Accepted Manuscript of an article published by Taylor & Francis in Vehicle System Dynamics on 07/04/2014, available online: http://dx.doi.org/10.1080/00423114.2014.901541. Presented at: 2013 23rd International Association for Vehicle System Dynamics (IAVSD) conference, Qingdao, China, 19-23 August 2013.
The authors would like to thank the RSSB and the TSLG for commissioning the project and providing industry
led guidance throughout. The authors would also like to thank DeltaRail for supporting model development and
providing simulated data from VAMPIRE models.