Computer Science
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8330791b&link_type=abstract
In Shock and Vibration Bulletin, no. 50, part 3 p 179-188 (SEE N83-30778 19-31)
Computer Science
Computer Programs, Error Analysis, High Power Lasers, Tracking (Position), Vibration, Laser Outputs, Mirrors, Optical Properties, Sensitivity, Structural Analysis, Transfer Functions
Scientific paper
Beam stabilization for the Airborne Laser Laboratory (ALL) is accomplished by inertially stabilizing an annular reference mirror attached to the beam expanding telescope on the Airborne Pointing and Tracking System (APT). The analysis reported here documents the calculation of the residual beam jitter due to vibrations of the ALL and required the use of the NASTRAN finite element computer code to determine the motion of the various optical elements in the beam expanding telescope. These motions were then combined in an analytical expression to calculate the optical path motion for both the high energy laser and autoalignment beams. The final step was the incorporation in the frequency domain of the effects of the two servo mechanisms that stabilize the telescope to an inertial reference and drive the beam steering mirror to align the autoalignment beam and the high energy laser beam to the annular reference mirror.
Budde C. L.
Johnson David C.
Merritt Paul H.
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