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Inertia parameter identification of anunknown captured space target

Xiaofeng Liu (Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai, China)
Bangzhao Zhou (Shanghai Jiao Tong University, Shanghai, China)
Boyang Xiao (Shanghai Jiao Tong University, Shanghai, China)
Guoping Cai (Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai, China)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 28 May 2019

Issue publication date: 21 August 2019

Abstract

Purpose

The purpose of this paper is to present a method to obtain the inertia parameter of a captured unknown space target.

Design/methodology/approach

An inertia parameter identification method is proposed in the post-capture scenario in this paper. This method is to resolve parameter identification with two steps: coarse estimation and precise estimation. In the coarse estimation step, all the robot arms are fixed and inertia tensor of the combined system is first calculated by the angular momentum conservation equation of the system. Then, inertia parameters of the unknown target are estimated using the least square method. Second, in the precise estimation step, the robot arms are controlled to move and then inertia parameters are once again estimated by optimization method. In the process of optimization, the coarse estimation results are used as an initial value.

Findings

Numerical simulation results prove that the method presented in this paper is effective for identifying the inertia parameter of a captured unknown target.

Practical implications

The presented method can also be applied to identify the inertia parameter of space robot.

Originality/value

In the classic momentum-based identification method, the linear momentum and angular momentum of system, both considered to be conserved, are used to identify the parameter of system. If the elliptical orbit in space is considered, the conservation of linear momentum is wrong. In this paper, an identification based on the conservation of angular momentum and dynamics is presented. Compared with the classic momentum-based method, this method can get a more accurate identification result.

Keywords

Acknowledgements

This work was supported by the Natural Science Foundation of China [grant number 11772187] and the Natural Science Foundation of Shanghai [grant number 16ZR1436200].

Citation

Liu, X., Zhou, B., Xiao, B. and Cai, G. (2019), "Inertia parameter identification of anunknown captured space target", Aircraft Engineering and Aerospace Technology, Vol. 91 No. 8, pp. 1147-1155. https://doi.org/10.1108/AEAT-04-2018-0128

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited