Active vibration isolation of multi-degree-of-freedom systems

One of the principal objectives of vibration isolation technology is to iso late sensitive equipment from a vibrating structure or to isolate the struc ture from an uncertain exogenous disturbance source. In this paper, a dynam ic observer-based active isolator is proposed that guarantees closed-loop a symptotic stability and disturbance decoupling between the vibrating struct ure and isolated structure. The proposed active isolator is applied to a un iaxial vibrational system and compared to an optimal linear-quadratic desig n.