Some aspects of investigation of motor vehicles steering wheels shimmy

Steering wheels vibrations around king pins, known as "shimmy", produce a harmful influence on motor vehicle steering parameters. They appear to be a result of the influence of road irregularities, clearance in the steering system, wheels unbalance, wheels and tires nonuniformity, etc. In a vehicle steering system design process, an optimal choice of vehicle parameters is of major importance for minimum values of wheels shimmy. This paper presents an attempt to model a truck steering system with power and mechanical steering so as to study steering wheels shimmy.