An Attitude Tracking Method for Small Video Satellite with Wide-Angle Camera
Aimed at the problem that traditional target tracking methods require prior position information of the target which are not suitable for non-cooperative target tracking,a target tracking method based on wide-angle camera image error for video satellite is proposed.A wide-angle camera imaging model is firstly established,and then the difference is calculated between the projected position of the target in the camera image plane and the expected position.The relative error,angular velocity and attitude error between the target and the small video satellite are calculated by image error,which are used as feedback terms to de-sign a nonlinear controller.Finally,the stability of the system is demonstrated by using the Barbalat's lemma.The simulation results show that the target driven to the desired position in the image plane can be effectively controlled in a wide field of view of a wide-angle camera and the effectiveness of this method is verified by Tiantuo-2 satellite on orbit data.
Small video satelliteVisual trackingWide-angle cameraAttitude controlError analysis
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