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Spacecraft momentum management procedures. [large space telescope
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sturch, C. R. Davenport, P. B. Chen, L. C. |
| Copyright Year | 1980 |
| Description | Techniques 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. |
| File Size | 651464 |
| Page Count | 19 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810002580 |
| Archival Resource Key | ark:/13960/t0gv0dj4t |
| Language | English |
| Publisher Date | 1980-10-01 |
| Access Restriction | Open |
| Subject Keyword | Astrodynamics Reaction Wheels Dynamic Control Pointing Control Systems Magnetic Dipoles Torquers Magnetic Control Hubble Space Telescope Onboard Data Processing Momentum Feedback Control Spacecraft Motion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
