Optimized star sensors laboratory calibration method using a regularization neural network

Applied Optics
Chengfen ZhangJiazhen Lu

Abstract

High-precision ground calibration is essential to ensure the performance of star sensors. However, the complex distortion and multi-error coupling have brought great difficulties to traditional calibration methods, especially for large field of view (FOV) star sensors. Although increasing the complexity of models is an effective way to improve the calibration accuracy, it significantly increases the demand for calibration data. In order to achieve high-precision calibration of star sensors with large FOV, a novel laboratory calibration method based on a regularization neural network is proposed. A multi-layer structure neural network is designed to represent the mapping of the star vector and the corresponding star point coordinate directly. To ensure the generalization performance of the network, regularization strategies are incorporated into the net structure and the training algorithm. Simulation and experiment results demonstrate that the proposed method can achieve high precision with less calibration data and without any other priori information. Compared with traditional methods, the calibration error of the star sensor decreased by about 30%. The proposed method can satisfy the precision requirement for large FOV star ...Continue Reading

Citations

Jul 17, 2020·Analytical Methods : Advancing Methods and Applications·Youjian ZhangQingdong Zeng
Jul 19, 2020·Optics Express·Qiaoyun FanGangyi Wang
Nov 22, 2018·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Tao YeJian Feng Xie

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