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Development of an Efficient Vehicle Dynamics Model Using Massless Link of a Suspension  

Jung Hongkyu (Graduate School of Automotive Engineering, Kookmin University)
Kim Sangsup (Graduate School of Automotive Engineering, Kookmin University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.1, 2005 , pp. 99-108 More about this Journal
Abstract
This paper represents an efficient modeling method of a suspension system for the vehicle dynamic simulation. The suspension links are modeled as composite joints. The motion of wheel is defined as relative one degree of freedom motion with respect to car body. The unique relative kinematic constraint formulation between the car body and wheel enables to derive equations of motion in terms of wheel vertical motion. Thus, vehicle model has ten degrees of freedom. By using velocity transformation method, the equations of motion of the vehicle is systematically derived without kinematic constraints. Various vehicle simulation such as J-turn, slowly increasing steer, sinusoidal sweep steer and bump run has been performed to verify the validity of the suggested vehicle model.
Keywords
Suspension system; Massless link; Kinematic characteristics; Multibody dynamics; Vehicle dynamics analysis;
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