Figure control concepts for segmented reflector telescopesControl analysis activities related to the development of figure control technologies for large space telescopes with precision segmented actively controlled primary reflectors are reviewed. The Precision Segmented Reflector (PSR) configuration is described along with the development and use of the PSR models. Geometric and dynamic models, characterization of figure estimation errors and optimal sensor placement, and the development of quasi-static and dynamic control concepts are outlined. The structure of a quasi-static controller is presented, that utilizes edge sensor measurements to estimate displacement errors at the actuator level and generates figure correction commands. The second approach considers decentralization of the reflector system at the panel level, while the third considers decentralization at the actuator level.
Document ID
19900043844
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Boussalis, D. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chu, C. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ih, C.-H. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wang, S. J. (JPL Pasadena, CA, United States)
Ryaciotaki-Boussalis, H. A. (California State University Los Angeles, United States)