Digital Control Algorithms for Microgravity Isolation Systems

[+] Author and Article Information
A. Sinha, Y.-P. Wang

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802

J. Vib. Acoust 115(3), 256-263 (Jul 01, 1993) (8 pages) doi:10.1115/1.2930342 History: Received March 01, 1991; Revised July 01, 1992; Online June 17, 2008


New digital control algorithms have been developed to achieve the desired transmissibility function for a microgravity isolation system. Two approaches have been presented for the controller design in the context of a single degree of freedom system for which an attractive electromagnet is used as the actuator. The relative displacement and the absolute acceleration of the mass have been used as feedback signals. The results from numerical studies are presented. It has been found that the resulting transmissibility is quite close to the desired function. Also, the maximum coil currents required by new algorithms are smaller than the maximum current demanded by the previously proposed lead/lag method.

Copyright © 1993 by The American Society of Mechanical Engineers
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