J. Phys. IV France
Volume 12, Number 11, décembre 2002
Page(s) 41 - 48

J. Phys. IV France
12 (2002) Pr11-41
DOI: 10.1051/jp4:20020473

Six-degree-of-freedom hexapods for active damping and active isolation of vibrations

A. Abu Hanieh, M. Horodinca and A. Preumont

Université Libre de Bruxelles, SCMeRo, 50 avenue Roosevelt, CP. 165/42, 1050 Bruxelles, Belgique

As future astronomic missions will require more and more stringent resolution requirements, the high demand for an environment clean of vibrations and disturbance appears. This also leads to the need for high precision steering devices for fine pointing of sensitive optics with the highest possible accuracy. Several methods exist to reduce vibration levels: the first consists in isolating the sensitive system from the perturbation and the second in damping the structure vibration modes. Therefore, two Stewart platforms have been designed, manufactured and tested. The first is a sol? hexapod that provides 6 degree-of-freedom (DOF) active isolation and the second is a stiff hexapod that provides active damping to whatever flexible payload attachedmounted to it. In addition, both hexapods have steering capabilities.

© EDP Sciences 2002