NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Spacecraft momentum management proceduresTechniques appropriate for implementation onboard the space telescope and other spacecraft to manage the accumulation of momentum in reaction wheel control systems using magnetic torquing coils are described. Generalized analytical equations are derived for momentum control laws that command the magnetic torquers. These control laws naturally fall into two main categories according to the methods used for updating the magnetic dipole command: closed loop, in which the update is based on current measurements to achieve a desired torque instantaneously, and open-loop, in which the update is based on predicted information to achieve a desired momentum at the end of a period of time. Physical interpretations of control laws in general and of the Space Telescope cross product and minimum energy control laws in particular are presented, and their merits and drawbacks are discussed. A technique for retaining the advantages of both the open-loop and the closed-loop control laws is introduced. Simulation results are presented to compare the performance of these control laws in the Space Telescope environment.
Document ID
19810002580
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chen, L. C.
(General Software Corp. Silver Spring, Md., United States)
Davenport, P. B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sturch, C. R.
(Computer Sciences Corp. Silver Spring, Md., United States)
Date Acquired
August 11, 2013
Publication Date
October 1, 1980
Publication Information
Publication: Fifth Ann. Flight Mech.(Estimation Theory Symp.
Subject Category
Astrodynamics
Accession Number
81N11088
Funding Number(s)
CONTRACT_GRANT: NAS5-24300
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available