Characteristics of Farm Field Profiles as Sources of Tractor Vibration,
HOKKAIDO UNIV SAPPORO (JAPAN)
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To evaluate farm field profiles as sources of tractor vibration, profiles of meadows and rough terrains were measured and analyzed. A slope angle measuring apparatus with a vertical gyroscope was made to measure profiles using the slope integration method. Periodic uneveness was not found in the measured profiles, therefore it may be assumed that profiles of farm fields, except plowed field with furrows, are random and non-periodic. Power spectral densities0.1-3.5cm of measured profiles could be approximated by a straight line on a log-log paper.