Infrared and Laser Engineering, Volume. 51, Issue 9, 20210875(2022)
Directivity calibration and correction of bracket for star sensor
Figures & Tables(15)
Fig. 1. Flow chart of precise assembly and adjustment of star sensor bracket
Fig. 4. Corresponding relationship of coordinate axis and solution state
Fig. 6. Position relationship between star sensor bracket and camera’s cube prism
Fig. 9. Pointing accuracy histogram of star senstor bracket before and after correction
Table 1. Measurement results of
qx andqz View tableView in ArticleTable 1. Measurement results of
qx andqz First Second/(°) Third/(°) Average/(°) qx 37.4154 37.4162 37.4161 37.4159 qz 55.665 55.6650 55.6646 55.6649
Table 2. Relationship comparison between actual coordinate, theoretical coordinate of bracket for star sensor and camera coordinate
View tableView in ArticleTable 2. Relationship comparison between actual coordinate, theoretical coordinate of bracket for star sensor and camera coordinate
Camera coordinate system x/(°) z/(°) y/(°) Coordinate system of bracket for star sensor Theory q 37.2491 55.8810 76.8521 m 54.8294 144.8294 90 n 100.7159 97.5287 13.1479 Reality q 37.4159 55.6649 76.9430 m 54.6196 144.6169 90 n 100.6145 97.5163 13.057
Table 3. Measurement results of
qx andqz after the first grinding and calibrationView tableView in ArticleTable 3. Measurement results of
qx andqz after the first grinding and calibrationFirst/(°) Second/(°) Third/(°) Average/(°) qx 37.2403 37.2405 37.2416 37.2408 qz 55.8860 55.8850 55.8855 55.8855
Table 4. Retest result after the first grinding and calibration
View tableView in ArticleTable 4. Retest result after the first grinding and calibration
Camera coordinate system x/(°) z/(°) y/(°) Coordinate system of bracket for star sensor q 37.2408 55.8855 76.8606 m 54.8355 144.8355 90 n 100.7098 97.5228 13.1394
Table 5. Retest result after the second grinding and calibration
View tableView in ArticleTable 5. Retest result after the second grinding and calibration
Camera coordinate system x/(°) z/(°) y/(°) Coordinate system of bracket for star sensor q First 37.2489 55.8806 - Second 37.2482 55.8804 - Third 37.2481 55.8804 - Average 37.2484 55.8805 76.8545
Table 6. Comparison of deviation before and after calibration of star senstor support
View tableView in ArticleTable 6. Comparison of deviation before and after calibration of star senstor support
Situation Included angle relationship ∆qx/(″) ∆qy/(″) ∆qz/(″) Before correction 600.48 327.24 −765.36 After first correction −29.52 30.6 16.2 After second correction −2.52 8.64 −1.8
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Yuanpeng Li, Jiang Guo. Directivity calibration and correction of bracket for star sensor[J]. Infrared and Laser Engineering, 2022, 51(9): 20210875
Paper Information
Category: Photoelectric measurement
Received: Feb. 10, 2022
Accepted: --
Published Online: Jan. 6, 2023
The Author Email: Guo Jiang (guojiang006@163.com)
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