For the steady-state circular turning of a 4WD-4WS (4 wheel driven - 4 wheel steered) tractor in a rice field, a numerical simulation was achieved. Equations of motion of this tractor were developed in a vehicle fixed x-y coordinate system. By comparing the calculated and measured results of acting forces on the tractor tires, this simulation was evaluated. Than, the characteristic parameters of the turning vehicle, which are the side slip angle and the yaw angular velocity of the vehicle center of gravity, were simulated in several combinations of steering wheel angle and the forward speed. Also the same simulation applied to a 4WD-2WS tractor which has the same body as the 4WD-4WS tractor. The simulated results showed a clear difference of turnability between 4WS and 2WS.
Numerical simulation of a 4WD-4WS tractor turning in a rice field
Journal of Terramechanics ; 36 , 2 ; 91-115
1999
25 Seiten, 12 Bilder, 22 Quellen
Article (Journal)
English
Numerical simulation of a 4WD-4WS tractor turning in a rice field
Automotive engineering | 1999
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