An efficient model for simulating articulated vehicle dynamics for yaw stability during heavy braking is developed. The system's governing equations are derived using Lagrange's Equations, eliminating the need for any assumptions concerning forces at the tractor-trailer hitch. Detailed parametric results are presented. Six important dimensionless parameter groups affecting yaw stability are identified. Parametric plots based upon numerical simulations, are presented and a yaw stability limit criterion is defined to evaluate the simulation results. The graphical results show that increasing trailer braking consistently increases stability, while increasing the trailer to tractor weight-ratio decreases stability assuming balanced tractor braking. The most influential parameter affecting vehicle stability is the trailer fore/aft C.G. position. This paper provides extensive quantitative results regarding important vehicle parameters that affect tractor-trailer yaw stability during hard braking. These results agree with previous work by others but differ in that are used Lagrange's Equations in deriving the governing equations. This eliminated the need for making unnecessary assumptions regarding tractor-trailer hitch forces. In addition, the graphical parametric results provided herein permit a convienient manner for evaluating stability and indicating trends for a large variety of tractor-trailer configurations.
Articulated vehicle yaw stability during braking - a parametric study
Richtungsstabilität eines Sattelkraftfahrzeuges während des Bremsens - eine Parameterstudie
2004
8 Seiten, 13 Bilder, 9 Quellen
Aufsatz (Konferenz)
Englisch
Articulated Vehicle Yaw Stability During Braking – A Parametric Study
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