A simple real-time aerodynamic model for vehicles in overtaking situations
Journal article, 2013

Aerodynamic forces and moments play an important role in, e.g., overtaking situations, and affect the trajectory of the involved vehicles. One method of studying these effects and how the driver responds is via driving simulator studies. However, models that describe aerodynamic forces and moments are typically computationally complex and not suited for real time execution in driving simulators. The present work presents a simplified real time model of the moments and forces acting in an overtaking situation due to aerodynamic pressure imbalances. The model is compared with experimentally validated Navier-Stokes solutions. Despite the model's simplicity, implemented as finite impulse response filters, it manages to capture the main features of the forces and moments. The approach used to derive the model is fairly general and might be used in similar applications where the computational burden is a key issue.

aerodynamic moments

aerodynamic forces

real-time simulation

vehicle overtaking


Fredrik Bruzelius

Chalmers, Applied Mechanics, Vehicle Engineering and Autonomous Systems

David Uystepruyst

Chalmers, Applied Mechanics, Fluid Dynamics

Bengt J H Jacobson

Chalmers, Applied Mechanics, Vehicle Engineering and Autonomous Systems

Sinisa Krajnovic

Chalmers, Applied Mechanics, Fluid Dynamics

International Journal of Vehicle Systems Modelling and Testing

1745-6436 (ISSN) 1745-6444 (eISSN)

Vol. 8 3 241-259

Driving Forces

Sustainable development

Areas of Advance


Subject Categories

Vehicle Engineering

Fluid Mechanics and Acoustics



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