Browse Publications Technical Papers 730653
1973-02-01

Tractor-Semitrailer Handling: A Dynamic Tractor Suspension Model 730653

This paper describes the addition of tandem-drive axles and tractor suspension dynamics to a digital computer model of a tractor-semitrailer truck. The extended model provides 22 degrees of freedom for the vehicle. Two degrees of freedom are included for the motion of each tractor axle; vertical tire flexibility, tandem-axle suspension jacking, and tandem-axle roll steer are also included in the extended model.
The features of the previous vehicle model (based on the work of Mikulcik) are retained in the extended model. These features include nonlinear equations for translation, yaw, pitch, and roll of both the tractor and the semitrailer (except as these motions are constrained by the fifth wheel), wheel rotation dynamics, and antiskid brake control. The model also includes a simulated “driver” which specifies the steering angle and the air pressure applied to the brakes.
The extended model is compared with the prior model by performing comparison tests involving simultaneous cornering and braking. The model is then used to investigate the effects of nonhorizontal torque rods at the tandem axles on the behavior of the vehicle.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Real Time 7 DOF Vehicle Dynamics Model and its Experimental Verification

2002-01-1184

View Details

TECHNICAL PAPER

Real Time 7 DOF Vehicle Dynamics Model and its Experimental Verification

2002-01-1184

View Details

TECHNICAL PAPER

Measuring and Modeling Suspensions of Passenger Vehicles

2013-01-0774

View Details

X