Accession Number : AD0817503

Title :   APPLICATION OF MAGNETIC TORQUING FOR DESATURATION OF CONTROL MOMENT GYROS IN SPACE VEHICLE CONTROL.

Descriptive Note : Final rept. 1 Apr-15 Dec 66,

Corporate Author : WESTINGHOUSE DEFENSE AND ELECTRONIC SYSTEMS CENTER BALTIMORE MD AEROSPACE DIV

Personal Author(s) : Hart, Leonard R. ; Alatalo, Harold W. ; Braumiller, Jack

Report Date : JUN 1967

Pagination or Media Count : 203

Abstract : A group of control moment gyros can be used to control the attitude of a space vehicle by exchanging momentum with the rest of the spacecraft. However, externally caused disturbance torques acting on the vehicle would saturate the momentum capability of the gyros if no auxiliary torquing methods were provided to unload the stored momentum. This function can be performed by a set of three current-carrying coils which interact with the earth's magnetic field in a process of continually resetting the control moment gyro gimbal angles to 'zero' position. The performance and weight of a magnetic system to momentum desaturate control moment gyros have been determined as functions of spacecraft size, altitude, and orbit inclination over the ranges of interest for a large, earth orbiting manned space vehicle. In a digital computer simulation of the combined control moment gyro and magnetic systems, the torques exerted by the latter had a negligible effect on the pointing accuracy of the former. Designs have been completed for the elements of the magnetic system and the interface with the control moment gyros has been defined. (Author)

Descriptors :   (*SPACECRAFT, ATTITUDE CONTROL SYSTEMS), (*GYRO STABILIZERS, SATELLITE ATTITUDE), TORQUE, MOMENTUM, CONTROL SYSTEMS, STABILIZATION SYSTEMS, GEOMAGNETISM, SIMULATION, FEASIBILITY STUDIES, PERFORMANCE(ENGINEERING), MAGNETIC MOMENTS, MAGNETOMETERS.

Subject Categories : Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE