Stewart platform is widely used for vibration isolation and precise pointing. As it is a statically determinate structure, if any strut has fault, a disaster could be unavoidable. In the present paper, an octostrut passive vibration isolation platform with redundancy is introduced and applied to whole-spacecraft vibration isolation. This platform is modeled with the Newton-Euler method. To avoid such possibility that the spacecraft may interact with the fairing, an approach of stiffness design is proposed to reinforce the rotation stiffness of the platform. With the mathematical model, design parameters of the isolator that will affect the nature frequencies of the isolator-spacecraft system are studied. The transmissibility of the isolator topped with rigid and flexible spacecraft is also studied. Results of analytical and numerical studies show that the octo-strut platform is a reliable and effective approach to improving the dynamic environment of a spacecraft.
Octo-strut vibration isolation platform and its application to whole spacecraft vibration isolation
Achtstrebige Plattform zur Schwingungsisolierung und ihr Einsatz bei der Schwingungsisolierung in Raumfahrzeugen
Journal of Sound and Vibration ; 289 , 4/5 ; 726-744
2005
19 Seiten, 13 Bilder, 2 Tabellen, 13 Quellen
Aufsatz (Zeitschrift)
Englisch
Octo-strut vibration isolation platform and its application to whole spacecraft vibration isolation
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