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Vehicle dynamic considerations regarding the safety of lightweight vehicles need to cover different aspects
than those regarding conventional automobiles. New problems and effects require dedicated research and
modified methods. The present contribution discusses these new challenges covering aspects like specific
vehicle design concepts (e.g. three-wheelers) and the significance of human body mass in relation to the
total mass.
Some initial simulation results are presented that were gained with an example design of a three-wheeled
two seater vehicle. The results show that the seating position and number of passengers have a significant
influence on the stability against rollover. Thus they illustrate that the mass of the human body is of
importance for the dynamic behaviour of the overall system.
The article gives a list of further effects like the stiffness and damping properties of the human body and
also the influence of the human as part of the system in terms of control engineering. A strategy is
suggested which combines computer simulation and road tests. This strategy minimizes the need for costly
testbed experiments for optimizing the simulation models. Particularly when simulation is employed in
order to reduce the need for sensors that would require complicated structural modification (e.g. force
sensors in suspension components). Ideally, sensor application can be limited to inertial sensors and other
positioning sensors like GPS.