As convertible cars have a relatively flat geometry, they are prone to torsional vibrations. The conventional way to suppress such vibrations is to install passive linear absorbers in the rear of the car. However, these passive absorbers add up to 25 kg to the weight of the car. Furthermore their effectiveness is reduced by all effects which change the weight or the stiffness of the car such as baggage, temperature or aging effects. In order to overcome these drawbacks, an active linear absorber for convertibles has been developed. It has been designed to fit into the same space as the existing passive system, yet reduces the weight by about a factor of 2. Furthermore the performance of the system has been significantly increased, which was evaluated during a harmonic torsion analysis, as well as during driving tests under bad road conditions. By means of an adaptive control algorithm the system adapts to varying stochastic excitation and to changes of the car's structural properties.
Design, system integration and control concepts of an adaptive active vibration absorber for a convertible
2012
13 Seiten, 14 Bilder, 1 Tabelle, 9 Quellen
Conference paper
English
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