Center of Mass Estimation for a Spinning Spacecraft Using Doppler Shift of the GPS Carrier Frequency
Center of Mass Estimation for a Spinning Spacecraft Using Doppler Shift of the GPS Carrier Frequency
- Neue Suche nach: A. Croll
- Neue Suche nach: A. Hess
- Neue Suche nach: J. Zahringer
- Neue Suche nach: T. Sorgenfrei
- Neue Suche nach: A. Senchenkov
- Neue Suche nach: A. Egorov
- Neue Suche nach: K. Mazuruk
- Neue Suche nach: M. Volz
- Neue Suche nach: A. Croll
- Neue Suche nach: A. Hess
- Neue Suche nach: J. Zahringer
- Neue Suche nach: T. Sorgenfrei
- Neue Suche nach: A. Senchenkov
- Neue Suche nach: A. Egorov
- Neue Suche nach: K. Mazuruk
- Neue Suche nach: M. Volz
A sequential filter is presented for estimating the center of mass (CM) of a spinning spacecraft using Doppler shift data from a set of onboard Global Positioning System (GPS) receivers. The advantage of the proposed method is that it is passive and can be run continuously in the background without using commanded thruster firings to excite spacecraft dynamical motion for observability. The NASA Magnetospheric Multiscale (MMS) mission is used as a test case for the CM estimator. The four MMS spacecraft carry star cameras for accurate attitude and spin rate estimation. The angle between the spacecraft nominal spin axis (for MMS this is the geometric body Z-axis) and the major principal axis of inertia is called the coning angle. The transverse components of the estimated rate provide a direct measure of the coning angle. The coning angle has been seen to shift slightly after every orbit and attitude maneuver. This change is attributed to a small asymmetry in the fuel distribution that changes with each burn. This paper shows a correlation between the apparent mass asymmetry deduced from the variations in the coning angle and the CM estimates made using the GPS Doppler data. The consistency between the changes in the coning angle and the CM provides validation of the proposed GPS Doppler method for estimation of the CM on spinning spacecraft.
Dokumentinformationen
Center of Mass Estimation for a Spinning Spacecraft Using Doppler Shift of the GPS Carrier Frequency
2016
63 pages
Report
Keine Angabe
Englisch
Chemistry , Astronautics , Space Launch Vehicles & Support Equipment , Unmanned Spacecraft , Bridgman method , Germanium , Silicon , Gallium , Crystal growth , Crystals , Microgravity , Vacuum furnaces , Crystallography , Doped crystals , Nasa space programs , Vibration tests , Crystal dislocations , Temperature profiles , International space station , Unmanned spacecraft , Scientific satellites , International cooperation , Russian space program
Ähnliche Titel
CENTER OF MASS ESTIMATION FOR A SPINNING SPACECRAFT USING DOPPLER SHIFT OF THE GPS CARRIER FREQUENCY
| British Library Conference Proceedings | 2016