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Servo Reduces Friction In Flexure BearingProposed servocontrol device reduces such resistive torques as stiction, friction, ripple, and cogging in flexure bearing described in LAR-14348, "Flexure Bearing Reduces Startup Friction". Reduces frictional "bump" torque encountered when bearing ball runs into buildup of grease on bearing race. Also used as cable follower to reduce torque caused by cable and hoses when they bend because of motion of bearing. New device includes torquer across ball race. Torquer controlled by servo striving to keep flexure at null, removing torque to outer ring. In effect, device is inner control loop reducing friction, but does not control platforms or any outer-control-loop functions.
Document ID
19910000597
Document Type
Other - NASA Tech Brief
Authors
Clingman, W. Dean (Boeing Aerospace and Electronics Co.)
Date Acquired
August 14, 2013
Publication Date
November 1, 1991
Publication Information
Publication: NASA Tech Briefs
Volume: 15
Issue: 11
ISSN: 0145-319X
Subject Category
MECHANICS
Report/Patent Number
LAR-14349
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.