State-of-the-art in recent developments concerning suspension seats STUDIES AND RESEARCH PROJECTS

The laboratory/field evaluations of suspension seats thus need to consider the following: Seat load: The dynamic responses of the body contribute considerably to the vibration performance of the seat in a highly complex manner (Lewis, C. [...] The suspension performance under the base vibration, representative of a vehicle, is evaluated in terms of SEAT (Seat Effective Amplitude Transmissibility), a measure of the ratio of the frequency-weighted RMS acceleration of the seat, ? ? ? ? , to that at the base, ? ? ? ? , such that (Griffin, 1990): ? ? ? ? ? ? ? ? = ? ? ? ? (4.3) ? ? ? ? The above measure provides the overall vibration isol. [...] The laboratory and field evaluations do not consider the relative motion of the suspension or the seated driver with respect to the base and the controls, which is an important measure for the low frequency suspension seats. [...] The air springs also facilitate the implementation of the automatic ride height adjustment and the adjustment of the suspension for body mass variations. [...] Considering the strong dependence of the suspension performance on the magnitude and the frequency of the target vehicle vibration, Maciejewski et al.