抄録
The independent suspension system is adopted in the automobiles to make the driving be comfortable and maneuverable. Especially, the MacPherson strut mechanism is the one of the most commonly used mechanisms in front suspension because of a small number of component parts. But that reduces parameters to draw the ideal trajectory of the wheel spindle and limit the freedom of design. It is difficult to estimate the trajectory of the wheel spindle comparing the ideal one in three dimensional space. In this paper, we derive the closed-loop equations of the MacPherson strut mechanism as the spatial six-link mechanism of two degrees of freedom. With given values of steering and strut displacements, the formulas for analyzing the attitude of the strut are established. And sensitivity analyses were done using the closed-loop equations with respect to the coordinets of the spherical pair connecting the strut and the frame. The results of analysis is verified experimentally.
