Computer Science
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989cryo...29..550a&link_type=abstract
(Space Cryogenics Workshop, Frascati, Italy, July 18, 19, 1988, Proceedings. A91-28526 11-31) Cryogenics (ISSN 0011-2275), vol.
Computer Science
1
Cryogenic Temperature, Gratings (Spectra), Infrared Space Observatory (Iso), Spectrometers, European Space Agency, Liquid Helium, Mechanical Properties, Structural Design
Scientific paper
The cryogenic grating drive mechanism intended for the spectrometer in the ESA's Infrared Satellite Observatory described previously, has been further developed. Two new models were constructed and have been extensively tested. The linear motor was modified to allow a rotational movement. In this way, the complexity of the mechanism could be greatly reduced, yielding a more compact and robust assembly. Moreover, as the transmission of the linear motor to a rotational movement of the grating has become more simple and the motor has become more sophisticated, the average power consumption for a + or - 7-deg deflection range was reduced to less than 0.25 mW average. Also, a low power variable differential transformer was developed, which proved to be adequate to guarantee a positional accuracy of 3 arcseconds.
Aalders W. G. J.
Ploeger G. R.
van der Meij Z. N.
Wildeman Klaas J.
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