Accession Number:

AD0724609

Title:

Control System Design for Spin Axis Alignment with the Orbital Major Axis.

Descriptive Note:

Rept. for Jul-Oct 70,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF ENGINEERING SCIENCE OPERATIONS

Personal Author(s):

Report Date:

1970-12-30

Pagination or Media Count:

37.0

Abstract:

A control system design is presented for a spinning communications satellite in a highly eccentric, near-polar orbit. The design yields an alignment of the spin axis with the line of apsides and obviates ground commands except possibly for initial attitude acquisition and orbit determination. A technique is developed for the on-board prediction of the time of apogee passage and autonomous control at apogee for spin axis alignment with the local vertical. Cumulative errors in the apogee epoch predictions due to orbital period errors are avoided in this technique. Author

Subject Categories:

  • Unmanned Spacecraft
  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE