Three-dimensional vehicle models used today in the field of
vehicle dynamics lead especially in complicated applications, like
trucks with trailers, to very extensive systems of motion
equations.
These equation systems are no longer transparent, simply because
of their immensity. It is not possible to recognize eventual
arising sign errors, which may be of significant importance for the
vehicle movement.
In the present paper a possibility will be discussed, in which
motion equations can be designed and integrated automatically by a
computer program with little input.
Because of this, one is not forced to establish a fixed vehicle
model at the beginning of the analysis. The development of the
vehicle model can be undertaken step-by-step under consideration of
parallel running practical driving tests.
It is shown that the vehicle models which are used in
vehicle-dynamics can be divided into simple kinematic systems,
whose structure will be the input for the computer.