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| Title: |
Thruster Placement Issues and Possible Mitigation Methods for the ST-7 Disturbance Reduction System
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| Author(s): |
Hsu, O.; Markley, L.; Houghton, M.; Maghami, P.
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| Abstract: |
The Space Technology-7 Disturbance Reduction System is being designed to demonstrate the ability to shield a test mass from non-gravitational forces. In order to meet this goal, two advanced technologies will be employed: a highly sensitive Gravitational Reference Sensor and micro-Newton thrusters. ST-7 is limited to two clusters of four thrusters, which are sufficient to provide control for 6 degrees of freedom, but the overall effectiveness of the baseline configuration is limited by the noise on the measurement signals and the thrust outputs, the disturbance force caused by solar radiation pressure, and the performance of the individual thrusters. This paper presents and discusses these issues in greater detail along with possible mitigation methods.
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| NASA Center: |
Goddard Space Flight Center
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| Publication Date: |
2004
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| Document Source: |
CASI |
| Online Source: |
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| Document ID: |
20040082156
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| Publication Information: |
Number of Pages = 10 |
| Price Code: |
A02 |
| Meeting Information: |
Flight Dynamics Symposium, 29-30 Oct. 2003, Greenbelt, MD, United States |
| Keywords: |
AEROSPACE ENGINEERING; THRUST; SPACE MISSIONS; SPACECRAFT CONFIGURATIONS; PERTURBATION THEORY; SOLAR RADIATION; DYNAMIC CONTROL; NOISE MEASUREMENT; ELEVATION ANGLE; SENSORS; DEGREES OF FREEDOM; ATTITUDE CONTROL;
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| Accessibility: |
Unclassified; No Copyright; Unlimited; Publicly available; |
| Updated/Added to NTRS: |
2008-06-02 |
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