20 June 2000 Pointing control system of SOFIA
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Abstract
The challenging pointing stability requirement for the SOFIA telescope requires the application of sophisticated control concepts and high performance sensors and actuators. The pointing control concept involves a tracking system with optical cameras, a three-axis inertial stabilization loop, and the compensation of telescope deflections taking the secondary mirror control system into account. Special algorithms and techniques based on finite element calculations are applied for the online identification of telescope deflections and the design of the position control loop algorithm. New developments have been performed with regard to low noise fiber optic gyroscopes and spherical torquers for three degrees of freedom. The paper explains the control concept of the SOFIA telescope.
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Karl Wandner, Karl Wandner, Hans Juergen Kaercher, Hans Juergen Kaercher, } "Pointing control system of SOFIA", Proc. SPIE 4014, Airborne Telescope Systems, (20 June 2000); doi: 10.1117/12.389113; https://doi.org/10.1117/12.389113
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