SEMIACTIVE CONTROL FOR VIBRATION SUPPRESSION IN A SYSTEM SUBJECTED TOUNKNOWN DISTURBANCES

With the advent of materials, such as electrorheological fluids, whose material properties can be altered rapidly by means of external stimu li, employing such materials as actuators for the controlled attentuat ion of undesirable vibrations is now possible. Such control schemes ar e dubbed semi-active in that they attenuate vibrations whether applied actively or passively. We investigate various such control schemes, a llowing for both separate and joint control of the stiffness and dampi ng characteristics of the material. Simulation results are given for t he case of an electrorheological fluid.