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.


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    Title :

    Improved off-road tractor ride via passive cab and seat suspensions


    Additional title:

    Verbesserte Gelaendegaengigkeit von Ackerschleppern durch passive Kabinen-und Sitzaufhaengungen


    Contributors:
    Rakheja, S. (author) / Sankar, S. (author)

    Published in:

    Publication date :

    1983


    Size :

    9 Seiten, 11 Bilder, 6 Tabellen, 21 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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    Rakheja,S. / Sankar,S. / Concordia Univ.Montreal,CA | Automotive engineering | 1984


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    Rakheja, S. / Sankar, S. | SAE Technical Papers | 1984


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