Accession Number : ADD003842

Title :   Spacecraft Closed Loop Three-Axis Momentum Unloading System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Pistiner ,Josef Siegfried ; Muhlfelder,Ludwig

Report Date : 08 Mar 1977

Pagination or Media Count : 4

Abstract : The patent describes a system for autonomously unloading accumulated angular momentum on space craft reaction wheels in the attitude control systems with external torques generated by the interaction of spacecraft magnetic dipoles with the earth's magnetic field. An onboard computer receives reaction wheel speed information, wheel speed threshold and geomagnetic latitude information and controls magnetic dipoles that will create a spacecraft torque and desaturate reaction wheels in a closed loop system. (Author)

Descriptors :   *Patents, *Satellite attitude, *Attitude control systems, *Reaction control systems, Angular momentum, Torque, Closed loop systems, Momentum transfer, Magnetic fields

Subject Categories : Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE