Decentralized State Estimation Algorithm of Centralized Equivalent Precision for Formation Flying Spacecrafts Based on Junction Tree
Joint Authors
Dai, Mengyuan
Mu, Hua
Wu, Meiping
Xian, Zhiwen
Source
International Journal of Aerospace Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-10-18
Country of Publication
Egypt
No. of Pages
14
Abstract EN
As centralized state estimation algorithms for formation flying spacecraft would suffer from high computational burdens when the scale of the formation increases, it is necessary to develop decentralized algorithms.
To the state of the art, most decentralized algorithms for formation flying are derived from centralized EKF by simplification and decoupling, rendering suboptimal estimations.
In this paper, typical decentralized state estimation algorithms are reviewed, and a new scheme for decentralized algorithms is proposed.
In the new solution, the system is modeled as a dynamic Bayesian network (DBN).
A probabilistic graphical method named junction tree (JT) is used to analyze the hidden distributed structure of the DBNs.
Inference on JT is a decentralized form of centralized Bayesian estimation (BE), which is a modularized three-step procedure of receiving messages, collecting evidences, and generating messages.
As KF is a special case of BE, the new solution based on JT is equivalent in precision to centralized KF in theory.
A cooperative navigation example of a three-satellite formation is used to test the decentralized algorithms.
Simulation results indicate that JT has the best precision among all current decentralized algorithms.
American Psychological Association (APA)
Dai, Mengyuan& Mu, Hua& Wu, Meiping& Xian, Zhiwen. 2015. Decentralized State Estimation Algorithm of Centralized Equivalent Precision for Formation Flying Spacecrafts Based on Junction Tree. International Journal of Aerospace Engineering،Vol. 2015, no. 2015, pp.1-14.
https://search.emarefa.net/detail/BIM-1064535
Modern Language Association (MLA)
Dai, Mengyuan…[et al.]. Decentralized State Estimation Algorithm of Centralized Equivalent Precision for Formation Flying Spacecrafts Based on Junction Tree. International Journal of Aerospace Engineering No. 2015 (2015), pp.1-14.
https://search.emarefa.net/detail/BIM-1064535
American Medical Association (AMA)
Dai, Mengyuan& Mu, Hua& Wu, Meiping& Xian, Zhiwen. Decentralized State Estimation Algorithm of Centralized Equivalent Precision for Formation Flying Spacecrafts Based on Junction Tree. International Journal of Aerospace Engineering. 2015. Vol. 2015, no. 2015, pp.1-14.
https://search.emarefa.net/detail/BIM-1064535
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1064535