Abstract This paper presents an improved real-time sequential filter (IRTSF) for magnetometer-only attitude and angular velocity estimation of spacecraft during its attitude changing (including fast and large angular attitude maneuver, rapidly spinning or uncontrolled tumble). In this new magnetometer-only attitude determination technique, both attitude dynamics equation and first time derivative of measured magnetic field vector are directly leaded into filtering equations based on the traditional single vector attitude determination method of gyroless and real-time sequential filter (RTSF) of magnetometer-only attitude estimation. The process noise model of IRTSF includes attitude kinematics and dynamics equations, and its measurement model consists of magnetic field vector and its first time derivative. The observability of IRTSF for small or large angular velocity changing spacecraft is evaluated by an improved Lie-Differentiation, and the degrees of observability of IRTSF for different initial estimation errors are analyzed by the condition number and a solved covariance matrix. Numerical simulation results indicate that: (1) the attitude and angular velocity of spacecraft can be estimated with sufficient accuracy using IRTSF from magnetometer-only data; (2) compared with that of RTSF, the estimation accuracies and observability degrees of attitude and angular velocity using IRTSF from magnetometer-only data are both improved; and (3) universality: the IRTSF of magnetometer-only attitude and angular velocity estimation is observable for any different initial state estimation error vector.
Highlights IRTSF is a reliable and firm TAM-only attitude estimation method. Attitude accuracies using proposed IRTSF are higher than using traditional RTSF. Observability degree of IRTSF is better than the traditional RTSF. IRTSF can be convergent to sufficient accuracy at a finite (short enough) time. IRTSF can process serious initial condition (large enough initial state errors).
Magnetometer-only attitude and angular velocity filtering estimation for attitude changing spacecraft
Acta Astronautica ; 102 ; 89-102
2014-05-04
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Magnetometer-only Attitude and Rate Estimates for Spinning Spacecraft
British Library Conference Proceedings | 2000
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