基于星像位置误差估计星敏感器姿态角偏差的方法

doi:10.16180/j.cnki.issn1007-7820.2019.10.009

Abstract

Abstract:

When the traditional arctangent method is used to estimate the attitude deviation of the star sensor, there are problems such as the large amount of calculation that affects the real-time performance of the algorithm. Aiming at these problems, a new method that directly estimates the star sensor attitude angle deviation via the star position error was proposed in this study. The mathematical relationship between the star sensor attitude angle deviation and the star position was deduced based on the measurement theory of star sensor. Furthermore, in the condition of small field of view, the simplified quantitative formula between the star sensor attitude angle deviation and the star position was obtained. The simulation results indicated that the calculation speed of the proposed method was 25% faster than that of traditional method. Besides, the calculation accuracy of the new method was greater than traditional method. Theoretical derivation and simulation experiments demonstrated that the proposed method owned advantages such as small amount of calculation, good real-time performance and high precision, indicating the proposed method had certain engineering application value.

Key words: star sensor, star position error, arctangent method, small field of view, attitude angle measurement, attitude angle deviation

CLC Number:

TP391.4

ZHANG Yong,HE Yiyang,YOU Sihai. Method of Estimating Star Sensor Attitude Angle Deviation Based on Star Position Error[J].Electronic Science and Technology, 2019, 32(10): 43-47.

Figures/Tables 6

Figure 1.

Figure 2.

Table 1

Table 2

Figure 3.

Figure 4.

References 17

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参数	指标
视场	12°× 12°
焦距	131.5 mm
像元数	1 024×1 024
像元大小	0.027 mm
星等观测阈值	6.0 mV

误差理论值/(″)	本文方法计算值误差、时间/(″、s)		传统方法计算值误差、时间/(″、s)
(2,2)	(0.106 1,0.105 8)	0.451 2	(0.107 0,0.106 9)	0.602 3
(4,4)	(0.212 2,0.211 5)		(0.214 1,0.213 9)
(6,6)	(0.318 3,0.317 3)		(0.321 1,0.320 8)
(8,8)	(0.424 3,0.423 1)		(0.428 2,0.427 7)
(10,10)	(0.530 4,0.528 9)		(0.535 2,0.534 6)
(12,12)	(0.636 5,0.634 6)		(0.642 3,0.641 5)
(14,14)	(0.742 6,0.740 4)		(0.749 3,0.748 5)
(16,16)	(0.848 7,0.846 2)		(0.856 4,0.855 4)
(18,18)	(0.954 8,0.952 0)		(0.963 4,0.962 3)
(20,20)	(1.060 9,1.057 7)		(1.070 5,1.069 2)

Method of Estimating Star Sensor Attitude Angle Deviation Based on Star Position Error

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