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Sinn, A., Riel, T., Deisl, F., Schachner, S., & Schitter, G. (2019). High-bandwidth tip-tilt vibration compensation in telescope systems. In IFAC-PapersOnLine (pp. 549–554). IFAC-PapersOnLine/Elsevier. https://doi.org/10.1016/j.ifacol.2019.11.733
Joint Conference 8th IFAC Symposium on Mechatronic Systems (MECHATRONICS 2019), and 11th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2019)
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Event date:
4-Sep-2019 - 6-Sep-2019
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Event place:
Wien, Austria
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Number of Pages:
6
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Publisher:
IFAC-PapersOnLine/Elsevier, 52/15
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Peer reviewed:
Yes
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Keywords:
Control and Systems Engineering; Vibration compensation; telescopes; optical communication; fast steering mirror; tip-tilt compensation
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Abstract:
Mechanical vibrations resulting from wind, ground vibrations and actuator imperfections lower the performance of optical telescope systems used for astronomical applications, as well as free-space optical communication. This paper proposes a high-bandwidth tip-tilt compensation system for optical telescopes, in order to reduce the influence of these vibrations. A typical, high precision, motorized...
Mechanical vibrations resulting from wind, ground vibrations and actuator imperfections lower the performance of optical telescope systems used for astronomical applications, as well as free-space optical communication. This paper proposes a high-bandwidth tip-tilt compensation system for optical telescopes, in order to reduce the influence of these vibrations. A typical, high precision, motorized telescope system is used as a base for this evaluation. By utilization of a tip-tilt sensor, the resulting tip-tilt errors are measured and analyzed in the frequency domain. A fast steering mirror integrated into the optical path allows to compensate for the measured tip-tilt errors. The performance of the fast steering mirror based system is compared to the original, uncompensated system, as well as to a compensation loop, which uses the telescope mount to counteract measured errors. Experiments demonstrate a significant reduction of the tip-tilt errors due to vibrations by a factor of 5 (altitude axis) and by a factor of 4.6 (azimuth axis) utilizing a compensation bandwidth of up to 810 Hz.
en
Research Areas:
Sensor Systems: 50% Mathematical and Algorithmic Foundations: 50%
