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长春光学精密机械与物... [1]
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会议论文 [1]
发表日期
2010 [1]
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High accuracy star image locating and imaging calibration for star sensor technology (EI CONFERENCE)
会议论文
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
Zhang S.
;
Zhang Z.
;
Sun H.
;
Wang Y.
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提交时间:2013/03/25
Today aircraft attitude measurement technology plays an important role in an aircraft system because it can provide orientation for aircraft in action. Lately star sensor technology used in aircraft attitude measurement has become more and more popular because of its high accuracy
light weight
without attitude accumulation errors and other advantages. There are three main steps for star sensor to measure aircraft attitude
star image locating
star identification and attitude tracking. The latter two steps are based on the accuracy of star image locating. So it's critical to make efforts to advance the accuracy of star image locating. Some imaging errors
such as spherical aberration or coma aberration
also have negative effect on the accuracy of star image locating
of which the effect is necessarily reduced as well. At the beginning of this article
the structure of star sensor hardware is introduced. Secondly three methods for star image locating are described specifically
which are traditional centroid method
Gauss quadric fitting method and improved Gauss quadric fitting method. Subsequently an imaging calibration method is described for the purpose of reducing the effect of imaging errors. Finally the experiment shows that the accuracy of the star sensor is 2-arc-second. 2010 SPIE.
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