The performance of a space-based telescope with a segmented primary mirror is seriously decreased due to thermal deformation of its optical components, deployment procedure, and manufacturing procedure. To achieve diffraction-limited imagery, the telescope usually has multiple wave-front correctors, such as deformable primary mirror segments and a MEMS mirror. A control archtecuture of hierarchical coordination is established for such a space-based telescope in this papar. The initial wave-front errors are decomposed by wavelet transformation, then low- frequency errors are corrected by the primary mirror segment, and high-frequency errors are corrected by the MEMS mirror. A simple coordination control method and an optimization control method are applied to diliver the wave-front errors to the two corrctors. The simulation results show the optimization control can result in better correction effect.

Date Published: 12 March 2008
PDF: 9 pages
Proc. SPIE 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing, 66241F (12 March 2008);

Published in SPIE Proceedings Vol. 6624:
International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing
Liwei Zhou, Editor(s)