Accurate vision measurement for kinematic parameters of satellite separation tests
来源期刊：中南大学学报(英文版)2013年第7期
论文作者：HU Xing-zhi(胡星志) ZHU Zhao-kun(朱肇昆) CHEN Xiao-qian(陈小前)
文章页码：1825 - 1831
Key words：satellite separation; vision measurement; kinematic parameter; monocular vision; binocular vision; extraction error
Abstract: The accurate measurement of kinematic parameters in satellite separation tests has great significance in evaluating separation performance. A novel study is made on the measuring accuracy of monocular and binocular, which are the two main vision measurement methods used for kinematic parameters. As satellite separation process is transient and high-dynamic, it will bring more extraction errors to the binocular. Based on the design approach of intersection measure and variance ratio, the monocular method reflects higher precision, simpler structure and easier calibration for level satellite separation. In ground separation tests, a high-speed monocular system is developed to gain and analyze twelve kinematic parameters of a small satellite. Research shows that this monocular method can be widely applied for its high precision, with position accuracy of 0.5 mm, speed accuracy of 5 mm/s, and angular velocity accuracy of 1 (°)/s.
HU Xing-zhi(胡星志), ZHU Zhao-kun(朱肇昆), CHEN Xiao-qian(陈小前)
(College of Aerospace and Materials Engineering, National University of Defense Technology,
Changsha 410073, China)
Abstract:The accurate measurement of kinematic parameters in satellite separation tests has great significance in evaluating separation performance. A novel study is made on the measuring accuracy of monocular and binocular, which are the two main vision measurement methods used for kinematic parameters. As satellite separation process is transient and high-dynamic, it will bring more extraction errors to the binocular. Based on the design approach of intersection measure and variance ratio, the monocular method reflects higher precision, simpler structure and easier calibration for level satellite separation. In ground separation tests, a high-speed monocular system is developed to gain and analyze twelve kinematic parameters of a small satellite. Research shows that this monocular method can be widely applied for its high precision, with position accuracy of 0.5 mm, speed accuracy of 5 mm/s, and angular velocity accuracy of 1 (°)/s.
Key words:satellite separation; vision measurement; kinematic parameter; monocular vision; binocular vision; extraction error
