Exact(8)
Seat isolation efficiency, expressed by the SEAT value, was determined for all seats (67 conventional seats and 33 suspension seats) from the vertical acceleration measured on the floors and on the seats of the vehicles.
The Seat Effective Amplitude Transmissibility (SEAT) value is the ratio of the vibration experienced on top of the seat and the vibration that one would be exposed to when sitting directly on the vibrating floor.
The SEAT value is mostly used to select seat cushions or seat suspensions based on the transmission of vertical vibration to the principal supporting surface of a seat.
The SEAT value generally depends on the body mass, but in some cases the SEAT value of a lighter subject was lower than the SEAT value of a heavy one.
SEAT value is an objective metric and has been widely used to determine seat vibration isolation efficiency.
A SEAT value of less than 0.9 was achieved, clearly indicating the effectiveness of using an auxiliary volume with an air-spring as seat suspension.
Similar(52)
A rough road vibration stimulus was reconstructed on a shaker platform to verify if seat effective amplitude transmissibility (SEAT) values can be used as a reliable metric to determine dynamic seat comfort using seven seats and six subjects.
Using the frequency weightings in current standards, the SEAT values of each seat were calculated from the ratio of overall ride values with the foam seat to the overall ride values with the rigid reference seat, and compared to the corresponding MSDD at each frequency.
There was excellent correlation (R2= 0.97) between the subjective ratings and estimated SEAT values on the seat-top when the values are averaged over the six subjects.
Other anthropometric characteristics proved to be more important for the prediction of SEAT values by multiple regressions.
This study suggests that SEAT values, estimated from averaged seat-top transmissibility functions of six carefully selected subjects, could be used as a reliable metric to select the best seat for a specific road vibration input.
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