Using a 3-dimensional 14-DOF (degree of freedom) automobile handling model with active suspensions, different feedback combinations are optimized to control the lateral stability during maneuvering. The model considers a nonlinear tire model and a front wheel steering system with the effects of roll steer and camber thrust included. The basic signals to be fed back into each actuator are restricted to locally measured variables. This requires a minimum of three feedback gains for the operation of each actuator. Here, these simple control forces are applied in a comprehensive car handling model that includes yaw, longitudinal, lateral and wheel spin modes. A fourth component is added to the control forces which is proportional to measured handling signals of either the yaw rate, or the lateral slip at the front and rear axles, or lateral velocity of the vehicle center of gravity. Comparisons among the various feedback combinations are presented in terms of handling rsponse measures and normal load changes of tires due to changing the handling gains. The results predict the fundamental role of an active suspension in producing effective changes to lateral vehicle dynamics.
Effects of active suspension control policies on vehicle lateral dynamics
Wirkungen aktiver Federungsregelung auf die Längsdynamik von Fahrzeugen
1996
13 Seiten, 8 Bilder, 16 Quellen
Conference paper
English
Influence of Active Suspension Preview Control on the Vehicle Lateral Dynamics
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