RETROFITTING ACTIVE CONTROL INTO PASSIVE VIBRATION ISOLATION SYSTEMS

Active vibration control uses sensing and power actuators to attenuate vibrational energy due to external disturbances. Many of these system s are retrofitted into already existing passive ones. As a result allo wable relative motions are prescribed, and this influences the perform ance of the active system. This paper exposes these limitations and sh ows realistic expectations for two excellent control strategies.