An Experimental Investigation of Torque Noise in Satellite Bearings.

摘要

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)