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System for Stabilization and Pointing of a Stratospheric Balloon-Borne Telescope Sistema Para Estabilizacao E Apontamento de Telescopio Embarcado Em Balao Aestratosferico.

N8218558

Publication Date	1981
Personal Author	Borges, P. D. A.; Ghizoni, C. C.; Lino, C. D. O.
Page Count	8
Abstract	A control system for pointing and stabilization of an infrared radiometer to be flown in stratospheric balloon missions was developed and built. This system permitted the azimuth stabilization and orientation of the entire scientific platform, on which all missions subsystems were assembled, as well as the elevation of the longitudinal axis of the telescope alone. The classical control philosophy with linear and angular position and velocity sensors is used. The control reference was supplied by an on-board microcomputer, via telecommand. A flight in November 1980 produced a one degree accuracy in the elevation control loop and a quite acceptable stabilization in azimuth for the requirements of that mission.
Keywords	Attitude control Balloon-borne instruments Infrared telescopes Instrument orientation Stabilized platforms Stratosphere Azimuth Elevation angle Infrared radiometers Microcomputers Foreign technology
Source Agency	NASA Foreign Exchange Program
NTIS Subject Category	55D - Meteorological Instruments & Instrument Platforms 84A - Astronautics
Corporate Authors	Instituto de Pesquisas Espaciais, Sao Jose dos Campos (Brazil).; National Aeronautics and Space Administration, Washington, DC.
Supplemental Notes	In Portuguese; English Abstract. Presented at the 2ND Natl. Meeting on Automation, Salvador, Brazil, 8-15 de Jul. 1981.
Document Type	Technical Report
NTIS Issue Number	198214

System for Stabilization and Pointing of a Stratospheric Balloon-Borne Telescope Sistema Para Estabilizacao E Apontamento de Telescopio Embarcado Em Balao Aestratosferico.

System for Stabilization and Pointing of a Stratospheric Balloon-Borne Telescope Sistema Para Estabilizacao E Apontamento de Telescopio Embarcado Em Balao Aestratosferico.
N8218558

Publication Date	1981
Personal Author	Borges, P. D. A.; Ghizoni, C. C.; Lino, C. D. O.
Page Count	8
Abstract	A control system for pointing and stabilization of an infrared radiometer to be flown in stratospheric balloon missions was developed and built. This system permitted the azimuth stabilization and orientation of the entire scientific platform, on which all missions subsystems were assembled, as well as the elevation of the longitudinal axis of the telescope alone. The classical control philosophy with linear and angular position and velocity sensors is used. The control reference was supplied by an on-board microcomputer, via telecommand. A flight in November 1980 produced a one degree accuracy in the elevation control loop and a quite acceptable stabilization in azimuth for the requirements of that mission.
Keywords	Attitude control Balloon-borne instruments Infrared telescopes Instrument orientation Stabilized platforms Stratosphere Azimuth Elevation angle Infrared radiometers Microcomputers Foreign technology
Source Agency	NASA Foreign Exchange Program
NTIS Subject Category	55D - Meteorological Instruments & Instrument Platforms 84A - Astronautics
Corporate Authors	Instituto de Pesquisas Espaciais, Sao Jose dos Campos (Brazil).; National Aeronautics and Space Administration, Washington, DC.
Supplemental Notes	In Portuguese; English Abstract. Presented at the 2ND Natl. Meeting on Automation, Salvador, Brazil, 8-15 de Jul. 1981.
Document Type	Technical Report
NTIS Issue Number	198214