Computer Science – Performance
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..768u&link_type=abstract
IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 2 (A91-23201 08-89
Computer Science
Performance
Error Analysis, Power Spectra, Reflecting Telescopes, Servocontrol, Software Tools, Tracking (Position), Analog To Digital Converters, Equations Of Motion, Laplace Transformation, Torque
Scientific paper
The tracking performance of advanced technology telescopes is presently predicted by a time-domain nonlinear control model which incorporates the complex frequency-dependent transfer characteristics of a type II servosystem, including (1) rate and acceleration feedforward, (2) gimbal-drive motors, (3) motor power amplifiers, (4) mechanical drivetrain, (5) telescope structure, and (6) encoders. Disturbances generated by bearing friction, drive motor magnetic cogging, drive motor friction and torque constant variations, wind loads, etc, are included to enhance the accuracy of tracking error predictions under operating conditions. The model is useful in both initial design studies and the evaluation of proposed design modifications.
Calmes Lonnie
Pflibsen Kent
Sheppard Chris
Ulich Bobby
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