Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..305u&link_type=abstract
IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 1 (A91-23201 08-89
Astronomy and Astrophysics
Astronomy
Infrared Astronomy, Infrared Telescopes, Mirrors, Modulation, Block Diagrams, Controllers, Power Spectra, Servomotors, Signal To Noise Ratios
Scientific paper
In order to achieve a high speed/high precision/low power consumption IR telescope chopping system which excites no mechanical resonances, in conjunction with a device size smaller than the secondary mirror diameter, a chopping servo has been developed which uses feedforward control with optimized driving torque as well as feedback control guided by robust stability theory. The compactness of the device has been achieved through the use of an Nd-Fe-B magnet motor and the balancing of the mirror against the mass of the electromechanical system. The chopper has a 10-msec transient time, and stability in excess of 1 arcsec, for square-wave chopping with amplitudes of as much as 300 arcsec.
Mizuno Shigeki
Ueda Takaharu
Yamamoto Tetsu
No associations
LandOfFree
Chopping secondary mirror system for 1.3 M infrared telescope does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Chopping secondary mirror system for 1.3 M infrared telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chopping secondary mirror system for 1.3 M infrared telescope will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1097879