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2 results on '"magnetometer sensor"'

1. Signal Conditioning for the Kalman Filter: Application to Satellite Attitude Estimation with Magnetometer and Sun Sensors.

Author

Esteban, Segundo, Girón-Sierra, Jose M., Polo, Óscar R., and Angulo, Manuel

Subjects
*KALMAN filtering, *MAGNETOMETERS, *QUATERNIONS, *MATHEMATICAL models, *MAGNETIC dipole moments
Abstract

Most satellites use an on-board attitude estimation system, based on available sensors. In the case of low-cost satellites, which are of increasing interest, it is usual to use magnetometers and Sun sensors. A Kalman filter is commonly recommended for the estimation, to simultaneously exploit the information from sensors and from a mathematical model of the satellite motion. It would be also convenient to adhere to a quaternion representation. This article focuses on some problems linked to this context. The state of the system should be represented in observable form. Singularities due to alignment of measured vectors cause estimation problems. Accommodation of the Kalman filter originates convergence difficulties. The article includes a new proposal that solves these problems, not needing changes in the Kalman filter algorithm. In addition, the article includes assessment of different errors, initialization values for the Kalman filter; and considers the influence of the magnetic dipole moment perturbation, showing how to handle it as part of the Kalman filter framework. [ABSTRACT FROM AUTHOR]

Published
2016
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2. Signal conditioning for the Kalman filter: application to satellite attitude estimation with magnetometer and sun sensors

Author

Manuel Angulo, Óscar R. Polo, S. Esteban, and Jose M. Giron-Sierra

Subjects
attitude determination and control, magnetometer sensor, Sun sensors, Kalman filter, low cost satellites, quaternion, condition number, 0209 industrial biotechnology, Engineering, Initialization, 02 engineering and technology, Simultaneous localization and mapping, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Article, Invariant extended Kalman filter, Analytical Chemistry, Extended Kalman filter, 020901 industrial engineering & automation, Control theory, lcsh:TP1-1185, Electrical and Electronic Engineering, Quaternion, Instrumentation, Alpha beta filter, Informática, business.industry, 010401 analytical chemistry, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Programación de ordenadores, Fast Kalman filter, business
Abstract

Most satellites use an on-board attitude estimation system, based on available sensors. In the case of low-cost satellites, which are of increasing interest, it is usual to use magnetometers and Sun sensors. A Kalman filter is commonly recommended for the estimation, to simultaneously exploit the information from sensors and from a mathematical model of the satellite motion. It would be also convenient to adhere to a quaternion representation. This article focuses on some problems linked to this context. The state of the system should be represented in observable form. Singularities due to alignment of measured vectors cause estimation problems. Accommodation of the Kalman filter originates convergence difficulties. The article includes a new proposal that solves these problems, not needing changes in the Kalman filter algorithm. In addition, the article includes assessment of different errors, initialization values for the Kalman filter; and considers the influence of the magnetic dipole moment perturbation, showing how to handle it as part of the Kalman filter framework.

Published
2016

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