Low frequency terrain-induced vibrations transmitted to off-road vehicle operators are quite severe and exceed ISO specified 'fatigue-decreased-proficiency' (FDP) limits.Ride improvement of an agricultural tractor is investigated via passive suspensions at the seat and/or cab for their relatively simpler adaptability to an existing tractor construction. The investigation has been carried out in three phases, namely: seat suspension incorporating bounce, longitudinal, lateral, roll, and pitch modes on a rigidly mounted cab; cab suspension with a rigidly mounted seat; seat suspension in bounce, bounce-lateral, and bounce-roll, mounted on a suspended cab. Optimum suspension parameters in each phase of study are selected to maintain all translational acceleration PSDs at the operator's location within 4 hours' exposure-FDP limits, and to minimize roll and pitch acceleration PSD response. The relative displacement in each case is constrained to a selected minimum. Ride improvement achieved during each phase of investigation is compared to ISO-FDP acceleration PSD limits, and conclusions are drawn. Contribution of factors such as seat-location and cab-geometry to ride improvement are also presented.
Improved off-road tractor ride via passive cab and seat suspensions
Verbesserte Gelaendegaengigkeit von Ackerschleppern durch passive Kabinen-und Sitzaufhaengungen
ASME-Papers ; 1-9
1983
9 Seiten, 11 Bilder, 6 Tabellen, 21 Quellen
Aufsatz (Konferenz)
Englisch
Suspension Designs to Improve Tractor Ride: I. Passive Seat Suspension
SAE Technical Papers | 1984
|Suspension Designs to Improve Tractor Ride: 1. Passive Seat Suspension
Kraftfahrwesen | 1984
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SAE Technical Papers | 1955
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