An Experimental Investigation of Torque Noise in Satellite Bearings.

Abstract

Many spin-stabilized spacecraft use precision ball bearings to support and to align an antenna or instrument platform relative to the rotor. The pointing accuracy of the instrument platform is affected by the dynamic fluctuations in running torque or torque noise of the bearings. Although many previous investigations have been concerned with average (or dc) torque, there is a lack of information on the spectral distribution of the torque noise of lightly loaded, large-diameter bearings at slow speeds. This paper summarizes experiments performed on seven pairs of bearings of two bore sizes. Limited measurements of bearing profilometry were made. A special fixture was used to measure torque noise over a range of preload, rotational speed, and temperature. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1974
Accession Number
AD0786782

Entities

People

  • H. Greer
  • R. A. Mack

Organizations

  • The Aerospace Corporation

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Artificial Satellites
  • Ball Bearings
  • Bearings
  • Diameters
  • Measurement
  • Platforms
  • Precision
  • Space Systems
  • Spacecraft
  • Spacecraft Components
  • Vehicles

Fields of Study

  • Engineering
  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Space Exploration and Orbital Mechanics.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).

Technology Areas

  • Space
  • Space - Hall-Effect Thruster
  • Space - Spacecraft Maneuvers