Prof. Junfeng Wu Profile

Prof. Junfeng Wu

at CIOMP

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Proceedings Article | 18 December 2023 Paper

Research on high-precision pointing control based on visual pixel deviation

Junfeng Wu, Xu Li, Hanyu Chen

Proceedings Volume 12963, 129630T (2023) https://doi.org/10.1117/12.3007464

KEYWORDS: Cameras, Image processing, Imaging systems, Satellites, Control systems, Visualization, Target recognition, Visual process modeling, 3D modeling, Matrices

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Aiming at the high-precision pointing requirements of on-orbit splicing or formation, a high-precision pointing control based on visual pixel deviation is proposed. First, the telephoto camera is used to identify the cooperative target at the sub-pixel level, and the pixel deviation of the target center in the center of the camera field of view is used as the pointing control amount, and the relationship model between the target pixel and pointing angle is established; on this basis, the momentum wheel is used as Output torque, the control model of pixel offset and output torque is established, and relatively high-precision pointing control is realized. The pointing control experiment of the single-axis air bearing turntable shows that the pointing angle resolution of a single pixel of the camera reaches 0.0037°, the pointing control accuracy reaches 0.0091°, and the pointing control stability reaches 0.01°/s, which verifies the high accuracy and effectiveness of the control scheme sex.

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