title: Target Capturing Control for Space Robots with Unknown Mass Properties: A Self-Tuning Method Based on Gyros and Cameras.
abstract: Satellite capturing with free-floating space robots is still a challenging task due to the non-fixed base and unknown mass property issues. In this paper gyro and eye-in-hand camera data are adopted as an alternative choice for solving this problem. For this improved system, a new modeling approach that reduces the complexity of system control and identification is proposed. With the newly developed model, the space robot is equivalent to a ground-fixed manipulator system. Accordingly, a self-tuning control scheme is applied to handle such a control problem including unknown parameters. To determine the controller parameters, an estimator is designed based on the least-squares technique for identifying the unknown mass properties in real time. The proposed method is tested with a credible 3-dimensional ground verification experimental system, and the experimental results confirm the effectiveness of the proposed control scheme.
authors: State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150000, China. lizhenyuhit@sohu.com.
authors: Zhenyu
authors: Z
authors: Li
authors: State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150000, China. wbhit@hit.edu.cn.
authors: Bin
authors: B
authors: Wang
authors: State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150000, China. dlrhitlab@aliyun.com.
authors: Hong
authors: H
authors: Liu
keywords: autonomous target capturing; free-floating space robot; mass property estimation; self-tuning control; space robot modeling