Detailed e all the components involved in the traction are
mathematically modelled in detail, using equations characterising
the movement and the way they interface with
each other; the motion of the vehicle as a whole is the result
of the interactions among its various sub-systems (assigned
to generate, transmit and use the mechanical power) and it
also derives from the vehicle architecture;
Synthetic e a self-propelled system is described by an
external observation point, writing its equations of motion
and deducing indirectly the characteristics of the system
that generates the power necessary for the movement