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- W4310346671 abstract "Small video satellites are a new category of tracking and observation satellites that have been developing rapidly in recent years, which can carry optical imaging payloads to continuously image specific targets or areas in real time and obtain their dynamic video information. Traditional small video satellite imaging tracking method requires the priori position information of the target and cannot observe non-cooperative ground targets. To remedy the deficiency, this paper designs a video image-based method which performs attitude adjustment based on the projection of the target in the image plane. Firstly, this paper establishes a camera model to reveal the principle of small video satellite perspective imaging; The spacecraft attitude kinematic model expressed in quaternion form and the spacecraft attitude dynamics model under the rigid body assumption are introduced; Then, the satellite attitude error and angular velocity error are calculated based on the deviation of the target real-time pixel coordinates from the desired projected position, and the error quaternion and error angular velocity are used as control feedback. In order to counteract the effects of torque disturbance and rotational inertia uncertainty on the satellite visual tracking control, a fast response overshoot-free sliding mode tracking controller without relying on the accurate model of the satellite is designed. The LaSalle invariance principle are used to demonstrate the asymptotic stability of the control system. Numerical simulation proves that the designed controller can effectively accomplish the visual tracking control of ground targets and has strong robustness against torque disturbances." @default.
- W4310346671 created "2022-12-09" @default.
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- W4310346671 date "2022-11-30" @default.
- W4310346671 modified "2023-10-16" @default.
- W4310346671 title "Image-Based Sliding Mode Attitude Control Research on Small Video Satellites" @default.
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- W4310346671 doi "https://doi.org/10.1007/978-981-19-8202-6_13" @default.
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