Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982spie..331...35p&link_type=abstract
IN: Instrumentation in astronomy IV; Proceedings of the Fourth Conference, Tucson, AZ, March 8-10, 1982 (A83-31976 14-35). Belli
Astronomy and Astrophysics
Astronomy
Cryogenic Cooling, Infrared Telescopes, Metal Fatigue, Reliability Engineering, Stepping Motors, Thermal Degradation, Axial Loads, Ball Bearings, Cases (Containers), Contraction, Cryogenic Equipment, Electrical Measurement, Failure Modes, Liquid Helium, Liquid Nitrogen, Low Temperature Tests, Lubrication, Space Infrared Telescope Facility, Torque
Scientific paper
Stepper motors may be used in several subsystems of the planned Shuttle Infrared Telescope Facility. Very high reliability is required in all considered applications. An investigation was, therefore, conducted to study the operational reliability of stepper motors, taking into account tests with a type of stepper motor which had previously performed well in uncooled spectrographic instruments. Two stepper motors were tested, in vacuum, at liquid nitrogen temperature. One motor was lubricated with a vacuum stable grease, while the other used unlubricated bearings. Both motors failed after less than 18,000 revolutions. The failure of the unlubricated motor indicated that motor modifications would have to be made to achieve operation at liquid helium temperature. The motor was modified to compensate for the magnitude of different thermal contractions. It was then found that modified stepper motors can perform reliably at LHe temperature for extended periods.
Bartko Frank
Houck James R.
Pompea Stephen M.
No associations
LandOfFree
Cryogenic testing of stepper motors 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 Cryogenic testing of stepper motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cryogenic testing of stepper motors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1032637