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Fluid Power Control of a Hyper-Active Seat for Low-Frequency Vibration Suppression
Published April 19, 2004 by University of Salerno in Italy
Whole-body vibrations pose a problem to operators of off-road vehicles and heavy machinery. Current vehicle suspension systems including passive seats do not provide adequate vibration suppression for the operator. To deal with this, a three-degree-of-freedom Hyper- Active Seat is being developed at the Georgia Institute of Technology to suppress the vibrations felt by the operator. Two sets of experiments were conducted to evaluate the potential performance of the Hyper- Active Seat. First, the step response of the seat was determined for each of the three degrees of freedom. Second, the frequency response of the seat was generated to show the seat's capability of suppressing low- frequency vibrations. These two experiments characterized the roll-off frequency and damping ratio of the seat from which a system model was developed for each degree of freedom and compared to the experimental results. This model will aid in the development of a controller for vibration suppression.