Analysis of the Accuracy and Influencing Factors of Space Flexible Vibration Target Position and Attitude Measurement

The accuracy and influencing factors of pose measurement for flexible vibration targets in space were analyzed, and pixel residuals (Pr) were studied as the key factor. Based on the theory of monocular vision measurement, a position and attitude measurement method for flexible vibration cooperative targets is proposed. Firstly, input constraints, including estimated vibration amplitude, target size envelope, and expected measurement accuracy; Then decompose the indicators under constraint conditions to design camera parameters and target configuration; Furthermore, multiple parameter combinations were used to simulate the monocular solution process and evaluate the deviation between the measured values and the true values. Finally, the impact of pixel residuals on accuracy was quantitatively analyzed, and the feasibility and economy of engineering implementation were comprehensively considered. In the example of a distance of 20m, multiple parameter design combinations with a three-axis position accuracy of better than 0.2mm and an attitude accuracy of better than 0.02° were obtained. The optimal combination was selected to verify the effectiveness of pixel residuals selection.