ACTUATOR DESIGN FOR A SIX-AXIS ACTIVE VIBRATION ISOLATION FOR SPACE APPLICATIONS

摘要

The future interferometric space missions will require more and more stringent conditions and higher orders of accuracy. The sensitive optical payloads need to be sufficiently isolated from the disturbances produced by the reaction wheel assembly and the cryocoolers while having the ability to be slewed and positioned successfully in quasi-static conditions. To achieve that, an active vibration isolator based on six-axis Stewart platform has been designed, manufactured and tested in the ULB. This isolator is based on the cubic architecture and contains a voice coil actuator and a force sensor in each of its six legs for the purpose of active isolation. In this paper, we investigate various technological aspects of the active leg developed at ULB, and further improved during a joint project ULB / Micromega sponsored by ESA.