Acta Photonica Sinica, Volume. 50, Issue 2, 155(2021)
An On-orbit Correction Method for High Dynamic APS Star Tracker Based on Adaptive Filtering
In order to improve the accuracy of star centroid extraction of high dynamic star sensor, an on-orbit correction method based on adaptive filtering was proposed, which can adaptively adjust the correction matrix at different angular velocities. Correction matrix is updated in real time by the noise estimation filter which is proposed based on temporal-spatial correlation. And the star point can be corrected in real time. Compared with the traditional method which correct on the ground, it not only reduces the cost, but also updates the correction matrix in real time, so the correction is more reliable. Experimental results show that the proposed method is effective in correcting star sensor under high dynamic conditions. Compared with the existing on orbit correction methods which can only appicable to low-speed star tracker (≤0.1°/s), the proposed method can adapt to the angular velocity of 0~3°/s, accurately correct the high dynamic star sensor, and successfully improve the accuracy of star centroid, which is of great significance to improve the dynamic performance of star sensor.
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Yaxian HOU, Rujin ZHAO, Yuebo MA, Longdong HE, Zifa ZHU. An On-orbit Correction Method for High Dynamic APS Star Tracker Based on Adaptive Filtering[J]. Acta Photonica Sinica, 2021, 50(2): 155
Category: Instrumentation, Measurement and Metrology
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Published Online: Aug. 26, 2021
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