Abstract
AbstractIn this paper a dynamic feedforward control approach for a continuously variable hydraulic semi-active damper of a vehicle suspension is presented. It takes into account dynamic effects in the damper force generation by employing a new hysteresis model. The hysteresis model describes the damper behavior considerably better than static characteristics do. The latter resemble the state of the art for the calculation of the control inputs of semi-active dampers in order to track reference forces from higher level suspension controllers. The low complexity of the hysteresis model enables its real time capability and thus the applicability of the damper control approach. The performance of the concept is validated in experiments on a quarter-car test rig by comparing the dynamic control approach with the static characteristic based control using a skyhook controller and a linear optimal regulator. The new dynamic feedforward controller especially improves ride safety by enabling better force tracking in the range of the wheel resonance frequency.
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