The paper presents control design and results of a leading experiment in the distance stabilization of large bodies, emulating optical mirrors, with picometer repeatability. The experiment, called COSI (Control Optics Structure Interaction), was funded by the European Space Agency (ESA) in view of future space telescopes needing picoradian precision over time scales >1s. Distance stabilization is achieved by actively controlling the optical length of Fabry-Perot cavities in the vacuum. The first experiments stabilized three 0.5m distances between two 7kg plates with a residual control error better than 3pm (1 sigma), in presence of severe environment noise and artificial micrometer distance variations, thus fully demonstrating feasibility of COSI concept and technology.

Active distance stabilization of large bodies with picometer repeatability / Canuto, Enrico; Donati, F.; Bertinetto, F.; Mana, G.; Bisi, M.; Cesare, S.; Pepe, F.. - STAMPA. - (1999), pp. 1704-1709. (Intervento presentato al convegno 1999 IEEE Int. Conf. On Control Applications tenutosi a Kohala Coast, HI nel 22-27 August 1999) [10.1109/CCA.1999.801228].

Active distance stabilization of large bodies with picometer repeatability

CANUTO, Enrico;
1999

Abstract

The paper presents control design and results of a leading experiment in the distance stabilization of large bodies, emulating optical mirrors, with picometer repeatability. The experiment, called COSI (Control Optics Structure Interaction), was funded by the European Space Agency (ESA) in view of future space telescopes needing picoradian precision over time scales >1s. Distance stabilization is achieved by actively controlling the optical length of Fabry-Perot cavities in the vacuum. The first experiments stabilized three 0.5m distances between two 7kg plates with a residual control error better than 3pm (1 sigma), in presence of severe environment noise and artificial micrometer distance variations, thus fully demonstrating feasibility of COSI concept and technology.
1999
078035446X
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1409355
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