Accession Number:

AD0743972

Title:

The Readout-Axis Stability of Elastic Nearly Spherical Gyro Rotors.

Descriptive Note:

Technical rept.,

Corporate Author:

STANFORD UNIV CALIF DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

Report Date:

1971-09-01

Pagination or Media Count:

141.0

Abstract:

Precision autocollimator readout of nearly spherical free-rotor gyroscopes, using a reflecting optical flat, requires that the normal to the flat be aligned with the rotor axis of maximum inertia and that the alignment remains stable during gyro operation. The normal to the flat is defined as the readout axis of the instrument angular misalignments between the normal and the axis of maximum inertia are called flat position errors. In previous reaearch, initial alignment to within 2 arcseconds has been achieved however, rotor flat-position errors were found to vary significantly when the gyro spin speed or temperature was changed. This investigation studies the variations as elastic phenomena so that the accuracy and stability of readout-axis orientation in arbitrary free-rotor gyroscopes can be understood. Author

Subject Categories:

  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE