SEMIACTIVE CONTROL FOR VIBRATION ATTENUATION

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 attenuati on of undesirable vibrations is now possible. Such control schemes are dubbed semiactive in that they attenuate vibrations whether applied a ctively or passively. We investigate various such control schemes, all owing for both separate and joint control of the stiffness and damping characteristics of the material.