Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991esasp.317..355h&link_type=abstract
In ESA, 10th ESA Symposium on European Rocket and Balloon Programmes and Related Research p 355 (SEE N92-24589 15-12)
Astronomy and Astrophysics
Astronomy
Balloon-Borne Instruments, Pointing Control Systems, Stabilization, Telescopes, Abstracts, Balloon Flight, Balloons, Guidance (Motion), Spacecraft Control
Scientific paper
The conclusion after 30 years of balloon astronomy is that the stabilization of balloon-borne telescopes requires very specific solutions. Gondola and telescope structures must be light. Consequently, they are not rigid and have low resonance frequencies. In such a mechanical environment, high gain tracking servo-systems are unstable. The faintest phase lag in the tracking loop sustains compound pendulum oscillations of the gondola telescope system. The simple and economical solution of these problems by modern control techniques is shown, and the extensive verification of these concepts over 13 flights with 4 gondolas carrying telescopes up to 60 cm or large stabilized solar platforms is described. The pointing stability is typically 3 inches RMS.
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