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Sensors 2015, 15(7), 16412-16429; doi:10.3390/s150716412

An Autonomous Star Identification Algorithm Based on One-Dimensional Vector Pattern for Star Sensors

School of Aerospace Science and Technology, Xidian University, Xi'an 710126, China
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Academic Editor: Vittorio M.N. Passaro
Received: 21 May 2015 / Revised: 24 June 2015 / Accepted: 2 July 2015 / Published: 7 July 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [772 KB, uploaded 7 July 2015]   |  

Abstract

In order to enhance the robustness and accelerate the recognition speed of star identification, an autonomous star identification algorithm for star sensors is proposed based on the one-dimensional vector pattern (one_DVP). In the proposed algorithm, the space geometry information of the observed stars is used to form the one-dimensional vector pattern of the observed star. The one-dimensional vector pattern of the same observed star remains unchanged when the stellar image rotates, so the problem of star identification is simplified as the comparison of the two feature vectors. The one-dimensional vector pattern is adopted to build the feature vector of the star pattern, which makes it possible to identify the observed stars robustly. The characteristics of the feature vector and the proposed search strategy for the matching pattern make it possible to achieve the recognition result as quickly as possible. The simulation results demonstrate that the proposed algorithm can effectively accelerate the star identification. Moreover, the recognition accuracy and robustness by the proposed algorithm are better than those by the pyramid algorithm, the modified grid algorithm, and the LPT algorithm. The theoretical analysis and experimental results show that the proposed algorithm outperforms the other three star identification algorithms. View Full-Text
Keywords: star sensor; star identification; one-dimensional vector pattern; star pattern star sensor; star identification; one-dimensional vector pattern; star pattern
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Luo, L.; Xu, L.; Zhang, H. An Autonomous Star Identification Algorithm Based on One-Dimensional Vector Pattern for Star Sensors. Sensors 2015, 15, 16412-16429.

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