Self-Collimation for Two-Dimensional Micro-Angle Measurement in Space

• 作者: REN Wenjia LIU Jin YANG Haima HUANG Bo JIAN Yumei
• 来源期刊: 武汉大学自然科学学报（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: Electronic and Electrical Engineering
• 页码范围: 156-164
• 页数: 9页
• 分类号: TN247
• 语种: 英文
• DOI: 10.19823/j.cnki.1007-1202.2021.0024

摘要

How to measure the two-dimensional attitude angle of space target and achieve stable tracking and aiming has become an important problem.The self-collimation is often measured via one-dimensional motion of the object in space.This paper proposes a micro-angle measurement system based on self-collimation to obtain the two-dimensional angle information of moving objects in space,and a thrice reflecting optical path structure is built to im-prove the compactness of the system.First,by establishing a posture angle measurement and decomposition model,the two-dimensional deflection angle value of the reflecting mirror is derived from the rotation angle equation;Second,the self-collimating measurement process is simulated to show the relationship between the reflecting mirror rotation angle and the imaging spot distortion of detector;Third,a two-dimensional micro-angle experimental platform is es-tablished based on the Position Sensitive Detector(PSD).Finally,nonlinear error of PSD is improved by the cubic spline interpolation method.The case results show a 15％reduction in the angle error.