Multi-link suspension having an additional link has become popular, because it provides flexibility for the designer to achieve the wheel motions desired. Multi-link is characterized by ball-joint connections at the ends of the linkages not to have bending moments. This suspension is constrained in the point of kinematics, but bushing enables it to move freely. So compliance elements such as bushings play a significant role in multi-link suspension.
Quasi-static analysis is performed by a potential energy minimize method which is an unconstraint optimization problem. The static equilibrium configuration of suspension is determined at every step during jouncing and rebounding as a configuration where the potential energy function is at its minimum. It is compared with kinematic analysis by toe angle and camber angle. So it is determined which bushing is important in suspension design by Quasi-static analysis.
