Accession Number : AD0693031

Title :   ATTITUDE STABILIZATION OF SPACECRAFT WITH GEOMAGNETIC RATE DAMPING.

Descriptive Note : Technical memo.,

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Pisacane,V. L.

Report Date : APR 1969

Pagination or Media Count : 48

Abstract : The paper studies two damping systems which can be used as part of the attitude control systems of geomagnetically, gravitationally, or spin-stabilized spacecraft. The devices are active and passive geomagnetic rate dampers that use the relative motion between the spacecraft and an ambient magnetic field to produce the required torques. The expressions for the torques generated by each device are derived. To investigate the usefulness of the dampers, an analytical study is made of the attitude performance of gravitationally stabilized spacecraft. To verify the assumptions that were made to make the dynamical problem analytically tractable, a digital simulation study is presented. Good agreement is obtained. The characteristics and applicability of each type of damper are also discussed. (Author)

Descriptors :   (*SCIENTIFIC SATELLITES, *ATTITUDE CONTROL SYSTEMS), STABILIZATION SYSTEMS, GEOMAGNETISM, GRAVITY, SPIN STABILIZATION, MAGNETIC FIELDS, DAMPING, INTERACTIONS, EXTENDABLE STRUCTURES, BOOMS(EQUIPMENT), APPROXIMATION(MATHEMATICS), NONLINEAR DIFFERENTIAL EQUATIONS, MATHEMATICAL MODELS

Subject Categories : Unmanned Spacecraft
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE