A SEMI-ACTIVE SUSPENSION SYSTEM CONTROL STRATEGIES USING MAGNETO RHEOLOGICAL DAMPER

摘要

A sensitivity control method of a variable magneto-rheological damper of a semi-active suspension system for a vehicle is provided to improve damping force of a vehicle body fallen in a resonant frequency band of the vehicle body, and to improve driving comport of the vehicle regardless of a road surface condition by adding an absolute value of vehicle mass velocity to the incomplete electric current velocity and deducing complete electric current velocity of the vehicle body. A sensitivity control method of a variable magneto-rheological damper of a semi-active suspension system for a vehicle comprises of the steps of: estimating incomplete electric current velocity and a performance index acted between a seat support and a seat inside the vehicle as the incomplete electric current velocity and acceleration of vehicle mass applied to the magneto-rheological damper; setting the incomplete electric current velocity as acceleration variation amount regarding electric current variation amount applied to the magneto-rheological damper of the semi-active suspension system; adding an absolute value of velocity of the vehicle mass to the incomplete electric current velocity and deducing complete electric current velocity.