Computer Science – Sound
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983esasp.183..349l&link_type=abstract
In ESA Sixth ESA Symp. on European Rocket and Balloon Programs and Related Res. p 349-353 (SEE N83-33397 21-46)
Computer Science
Sound
Attitude Control, Attitude Gyros, Digital Systems, Rotary Gyroscopes, Sounding Rockets, Coordinate Transformations, Inertial Reference Systems, Microcomputers, Pointing Control Systems, Roll, Star Trackers
Scientific paper
Attitude and boost control systems using tuned rotor gyros (TRG) as the inertial reference are described. Adoption of the TRG as the inertial reference permits pointing accuracy in the 1/2 to 5 arcmin range, and when integrated with a digital controller, allows almost unlimited reprogrammability of the flight program. A digital attitude control system (ACS) with a microprocessor in the ACS controller and the MIDAS platform and a star tracker as the references was flown. The control algorithm used a current estimator allowing high resolution control from a relatively low resolution reference. A second ACS uses a strapdown TRG set as the inertial reference and a Motorola 6809 microprocessor in the controller. A third system uses the TRGs and a three axes accelerometer set on a roll stable platform and provides the required accuracy for orbital vehicle control and satellite insertion. The digital controller incorporates the Intel 8086/8087 coprocessor.
Lyon S. D.
Rasmussen R. O.
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