A novel general approach is introduced to allocate the forces acting on the vehicle’s center of
gravity to the tire contact patch forces of the four wheels in an optimal fashion. A reference
planar vehicle motion model is inverted for this reason. The under-determination of the
model inversion is used as free parameter space for a non-linear online optimization. A
sequential optimization is used, minimizing firstly the error of the planar vehicle motion
and leveling secondly the tire utilizations. Thus the vehicle is operating in an optimal
fashion until the physical limit is reached and afterwards. By using constraints, all useful
configurations of actively and passively controlled influencing variables (wheel steer angles,
brake/drive torques, wheel loads and camber angles), with and without dynamic actuator
limits are analyzed. Furthermore the impact of actuator failures on vehicle dynamics is
analyzed.
«A novel general approach is introduced to allocate the forces acting on the vehicle’s center of
gravity to the tire contact patch forces of the four wheels in an optimal fashion. A reference
planar vehicle motion model is inverted for this reason. The under-determination of the
model inversion is used as free parameter space for a non-linear online optimization. A
sequential optimization is used, minimizing firstly the error of the planar vehicle motion
and leveling secondly the tire utiliz...
»