| Autor: |
Frederick F. Mobley, Robert E. Fischell |
| Rok vydání: |
1970 |
| Předmět: |
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| Zdroj: |
IFAC Proceedings Volumes. 3:639-654 |
| ISSN: |
1474-6670 |
| DOI: |
10.1016/s1474-6670(17)68816-5 |
| Popis: |
The DODGE satellite was launched on July 1, 1967 into a near-synchronous orbit to demonstrate gravity-gradient stabilization at that high altitude and to experiment with various design parameters and damping techniques. This satellite was the first to be three-axis stabilized at high altitude using gravity-gradient techniques. It continues to function satisfactorily to the present date. Stabilization in pitch and roll to better than ±;10 degrees has been obtained. The yaw stabilization of ±45 degrees has been fairly consistent; with the assistance of a small angular momentum flywheel, yaw accuracy of ±20 degrees was achieved. Magnetic damping of the sample-and-hold type and simulated hysteresis were both successful in damping librations. Efforts with the torsion wire suspended damper boom scheme were not successful, probably due to a mechanical bias in the device. A TV camera system permitted observation of the boom bending under the influence of solar heating. Mechanical hysteresis in the boom bending was observed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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