The dampers of semi-active vehicle suspensions have a limited working region. They are only capable of delivering control force in phase with damper contraction/expansion. Without special measures the delivered control force may be switched on and off abruptly at the entering/exiting of the damper working region. This causes deterioration of ride comfort quantified by the derivative of vehicle body acceleration (jerk).Proposed is a control algorithm modification for smooth force transition at the borders of the damper working region. A time based force modulation is used. A predictor of the time to exiting the working region is proposed to lower requested force in advance. A hybrid controller is investigated combining level and time based force modulation.
Low Jerk Predictive Force Modulation for Semi-Active Suspension Control
Sae Technical Papers
SAE World Congress & Exhibition ; 2008
2008-04-14
Conference paper
English
Low Jerk Predictive Force Modulation for Semi-Active Suspension Control
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