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Active Vibration Isolation of Multi-Degree-of-Freedom Systems

School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150 USA

Ali Razavi

George W Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405 USA

David C. Hyland

Department of Aerospace Engineering, The University of Michigan, Ann Arbor, MI 48109-2118 USA

One of the principal objectives of vibration isolation technology is to isolate sensitive equipment from a vibrating structure or to isolate the structure from an uncertain exogenous disturbance source. In this paper, a dynamic observer-based active isolator is proposed that guarantees closed-loop asymptotic stabil ity and disturbance decoupling between the vibrating structure and isolated structure. The proposed active isolator is applied to a uniaxial vibrational system and compared to an optimal linear-quadratic design.

Key Words: Disturbance rejection • active isolation • vibration suppression • multi-degree-of-freedom systems

Journal of Vibration and Control, Vol. 5, No. 4, 577-589 (1999)
DOI: 10.1177/107754639900500405


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