Jonghee Bae/Youdan Kim
International Journal of Aeronautical and Space Sicences, vol. 11, no. 2, pp.80-86, 2010

Abstract : We propose a spacecraft attitude estimation algorithm using a federated unscented Kalman filter. For nonlinear spacecraft systems, the unscented Kalman filter provides better performance than the extended Kalman filter. Also, the decentralized scheme in the federated configuration makes a robust system because a sensor fault can be easily detected and isolated by the fault detection and isolation algorithm through a sensitivity factor. Using the proposed algorithm, the spacecraft can continuously perform a given mission despite navigation sensor faults. Numerical simulation is performed to verify the performance of the proposed attitude estimation algorithm

Keyword : Spacecraft, Fault tolerant, Federated unscented Kalman filter