Physics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1304..127b&link_type=abstract
IN: Acquisition, tracking, and pointing IV; Proceedings of the Meeting, Orlando, FL, Apr. 19, 20, 1990 (A91-36851 15-35). Bellin
Physics
2
Balloon-Borne Instruments, Infrared Detectors, Pointing Control Systems, Remote Sensing, Numerical Control, Servomechanisms, Spacecraft Instruments, Torque Motors
Scientific paper
The design of two motor servoloops for an azimuth stabilization of a gondola of a large telescope is described. The system uses two dc torque motors, one for any motion of the platform around the vertical axis and one placed at the interconnecting point balloon-payload for attenuating the friction bearing. Mechanical nonlinearities impose a time domain design for any settling time control whenever the gondola experiences a new step in azimuth coordinate. A simplified equations of motion in the time domain are shown which enable this settling time to be controlled. A mechanical approach using an active pivot to avoid disturbances of the balloon rotation on current tracking of the sky azimuthal target is described.
Boscaleri Andrea
Colzi R.
Tronconi Alessandro
Venturi Valerio
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