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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (4): 524984-524984.doi: 10.7527/S1000-6893.2021.24984

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

Relative pose estimation and optimization of a failure satellite with low-light few-shot images

LIU Fucheng1, MU Jinzhen2,3,4, LIU Zongming2,3, HAN Fei2,3, LI Shuang4   

  1. 1. Shanghai Academy of Spaceflight Technology, Shanghai 201109, China;
    2. Shanghai Institute of Spaceflight Control Technology, Shanghai 201109, China;
    3. Shanghai Key Laboratory of Space Intelligent Control Technology, Shanghai 201109, China;
    4. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2020-11-18 Revised:2020-12-22 Published:2021-02-08
  • Supported by:
    National Key Research and Development Program (2016YFB0501003); National Natural Science Foundation of China (61690214, 11972182); Shanghai Scientific Research Program (19511120900, 19YF1420200)

Abstract: The serious damage of information in images under a low-light imaging condition may reduce the accuracy and robustness of the pose estimation of a failure satellite. Thus, this paper proposes an unsupervised Generative Adversarial Network (GAN)-based low-light image enhancement model. The generator is based on the U-Net with dense residual connection. The discriminator is designed as a global-local structure, and the traditional single scalar output of the discriminator is extended to the multiple scalar output. The single natural image Generative Adversarial Network (SinGAN) is improved based on evolutionary and parallel training methods to augment the few-shot training samples. Finally, a local map of feature information is established based on initialization of ORB-SLAM to alleviate dependence of pose estimation on reference frame. Through dense matching of Region of Interest (ROI) in key-frames, a nonlinear optimization model of the normal vector of plane and the mounting height of monocular camera is established to solve the scale factor. Through the similarity transformation after closed-loop detection, an equation for combined pose optimization in key-frames is established to achieve global correction of the pose transformation matrix. The experimental results show that the maximum error of the attitude angle is 4° in low-light images, while the maximum error of the attitude angle is 0.5°in enhanced images. When the target is rotating 5 cycles at 20°/s, our method can track 5 cycles in relatively static state, and 4.5 cycles in the range of 1 m horizontal maneuver. Hence, the proposed method can satisfy the need for relative pose measurement of failure satellites.

Key words: failure satellite, rotating target, generative adversarial network, low-light image enhancement, few-shot, relative pose estimation

CLC Number: