This technical report describes two truss experiments flown on the NASA KC-135 Reduced Gravity Aircraft. The purpose of these experiments was to investigate large space structure dynamics, ground test methods, and passive and active damping. A 2-meter truss was first flown to determine the rigid body dynamics in the aircraft during zero-gravity. The second flight's objective was to measure structural modes of a 12-meter truss, which represented a space structure component. Typically five to ten seconds of zero gravity data were recorded for each parabolic arc. Flight test results are compared with ground testing in which a low restraint spring mechanism was used to suspend the truss. Good correlation between ground and flight test results was achieved; the major differences were caused by suspension system friction, which coupled the frame modes with the bending and torsion modes.
Space Truss Zero Gravity Dynamics
1993
49 pages
Report
Keine Angabe
Englisch
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