wheel suspension - control system with variable damping coefficient, as a function of the frequency of the excitation force

摘要

In a suspension control system for a suspension for supporting a mass body (B) on a support base via a parallel combination of a shock absorber (10) having a variable damp coefficient and a spring means (8), absolute velocity (Ż) of the mass body (B) along a moving path of expansion and contraction of said shock absorber, relative velocity (Ẏ) of the mass body (B) in reference to the support base along the moving path, and acceleration () of the mass body along the moving path are cyclically obtained, and the damp coefficient is controlled according to a ratio (Ż/Ẏ) of the absolute velocity to the relative velocity with cyclic readjustment thereof so that at least either the damp coefficient is greater relative to the ratio when the acceleration is more rich in low frequency components or a frequency of the cyclic readjustment of the damp coefficient is lower when the acceleration is more rich in high frequency components.