Controls Astrophysics and Structures Experiment in Space (CASES) advanced studies and planning

Details Controls Astrophysics and Structures Experiment in Space (CASES) advanced studies and planning Controls Astrophysics and Structures Experiment in Space (CASES) advanced studies and planning

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989alab.rept.....w&link_type=abstract

Final Report Alabama Univ., Huntsville.

Astronomy and Astrophysics

Astrophysics

Astrophysics, Pinhole Occulter Facility, Spaceborne Experiments, Spacecraft Instruments, X Ray Astronomy, X Ray Imagery, Control Theory, Milky Way Galaxy, Space Shuttle Missions, Sun, Weightlessness

Scientific paper

The CASES (Controls, Astrophysics, and Structures Experiment in Space) program consists of a flight demonstration of CSI (Controls-Structures Interactions) technology on the Space Shuttle. The basis structure consists of a 32 m deployable boom with actuators and sensors distributed along its length. Upon deployment from the Orbiter bay, the CASES structure will be characterized dynamically and its deformations controlled by a series of experimental control laws; and cold gas thrusters at its tip will be used to orient the Orbiter to a fixed celestial reference. The scientific observations will consist of hard x-ray imaging, at high resolution, of the Sun and the Galactic center. The hard x-ray observations require stable (few arc min) pointing at these targets for one or more position-sensitive proportional counters in the Orbiter bay, which view the object to be imaged through an aperture-encoding mask at the boom tip. This report gives the concensus developed at the second CASES Science Working Group meeting, which took place at NASA Marshall Space Flight Center May 16-17, 1990. An earlier paper and scientific summaries are available and form the basis for the present discussion.

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