AN INTRODUCTION TO ACTIVE VIBRATION CONTROL

摘要

In order to motivate the use of active vibration control, consider the future interfero-metric missions planned by NASA or ESA (one such a mission, called "Terrestrial Planet Finder" aims at detecting earth-sized planets outside the solar system; other missions include the mapping of the sky with an accuracy one order better than that achieved by Hypparcos). The purpose is to use a number of smaller telescopes as an interferometer to achieve a resolution which could only be achieved with a much larger monolythic telescope. One possible spacecraft architecture for such an interferometric mission is represented in Fig.l; it consists of a main truss supporting a set of independently pointing telescopes.