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• W4281479243 abstract "Previous staring attitude control techniques utilize the geographic location of a ground target to dictate the direction of the camera’s optical axis, while the assembly accuracy and the internal structure of the spaceborne camera are not considered. This paper investigates the image-based staring controller design of a video satellite in the presence of uncertain intrinsic and extrinsic camera parameters. The dynamical projection model of the ground target on the image plane is firstly established, and then we linearly parameterize the defined projection errors. Furthermore, a potential function and a self-updating rule are introduced to estimate the parameters online by minimizing the projection errors. As the parameters are updating constantly, an adaptive control algorithm is developed, so that the errors between the current and the desired projections of the ground target converge to zero. The stability is proved using Barbalat’s lemma. Simulation results show that the designed controller can successfully move the target’s projection to the desired coordinate even though the camera parameters are unknown." @default.
• W4281479243 created "2022-05-26" @default.
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• W4281479243 date "2022-05-24" @default.
• W4281479243 modified "2023-10-01" @default.
• W4281479243 title "Spacecraft Staring Attitude Control for Ground Targets Using an Uncalibrated Camera" @default.
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• W4281479243 doi "https://doi.org/10.3390/aerospace9060283" @default.
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