Identification of Planar Double-wishbone Suspension Mechanism Using Jacobian Approach

The suspension mechanism plays an important role in the dynamic behaviour of the vehicle. However, the equivalent suspension and damping rates, which neglect the kinematic effects of the suspension mechanism, are mainly employed in the conventional vehicle model. This paper presents a Jacobian approach to determine the equivalent suspension and damping rates based on the kinematic characteristics of planar double-wishbone suspension mechanism. Introducing the Jacobian method of a planar mechanism, the kinestatic relations of a double-wishbone suspension mechanism are described using instantaneous screws. Based on the kinestatic relations, it determines the equivalent suspension and damping rates. The dynamic performances of the conventional quarter-vehicle model are derived using Lagrange’s equations. Finally, the dynamic performances of the conventional quarter-vehicle model are analysed and compared with the kineto-dynamic model and the simulation software Adams, respectively.