Abstract
The attitude parameter is an important state parameter for a long axisymmetric target. The plane intersection (PI) method is a commonly used method for attitude estimation. However, this method only uses planes’ information in the object space under a multiple camera system (more than two cameras simultaneously observing a target). We propose two methods to address the aforementioned issue. One method involves minimizing the square of the object-space angle residual (OAR) and the other method involves minimizing the square of the image-space angle residual (IAR). The linear optimization method is used for the above minimizing problems. The simulation results demonstrate that the IAR method has higher accuracy than the PI and OAR methods under multiple and dual camera systems because it incorporates information of a pair of corresponding image points. Furthermore, our experiments have shown that the linear method is generally faster, and it has an equivalent accuracy compared to the iterative method.
Highlights
The axis attitude is an important parameter for the motion state analysis, performance measurement, and aerodynamic parameter identification of rockets or missiles
Zhong et al.: High accuracy linear method for axis measurement direction of the optical axis, the X axis is perpendicular to the Z axis horizontally to the right, and the Y axis is perpendicular to the X axis and to the Z axis, whose direction is determined by the right-handed definition criterion
We can conclude from the above simulations: 1. The accuracy of the image-space angle residual (IAR) was higher than that of the object-space angle residual (OAR) and plane intersection (PI). 2
Summary
The axis attitude is an important parameter for the motion state analysis, performance measurement, and aerodynamic parameter identification of rockets or missiles. The intersection line of the planes of the two cameras can be calculated to obtain the target axis representation This method gives more accurate measurements than the method based on endpoints, and the form is intuitive. Zhong et al.: High accuracy linear method for axis measurement estimation method based on a monocular image for a rotating solid shape spacecraft that utilized the inherent characteristics of a spacecraft. This method was not applicable for other types of targets.
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