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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 724235, 8 pages
http://dx.doi.org/10.1155/2014/724235
Research Article

Reconfigurability Analysis Method for Spacecraft Autonomous Control

Beijing Institute of Control Engineering, Beijing 100190, China

Received 11 December 2013; Accepted 19 March 2014; Published 10 April 2014

Academic Editor: Xiaojie Su

Copyright © 2014 Dayi Wang and Chengrui Liu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

As a critical requirement for spacecraft autonomous control, reconfigurability should be considered in design stage of spacecrafts by involving effective reconfigurability analysis method in guiding system designs. In this paper, a novel reconfigurability analysis method is proposed for spacecraft design. First, some basic definitions regarding spacecraft reconfigurability are given. Then, based on function tree theory, a reconfigurability modeling approach is established to properly describe system’s reconfigurability characteristics, and corresponding analysis procedure based on minimal cut set and minimal path set is further presented. In addition, indexes of fault reconfigurable degree and system reconfigurable rate for evaluating reconfigurability are defined, and the methodology for analyzing system’s week links is also constructed. Finally, the method is verified by a spacecraft attitude measuring system, and the results show that the presented method cannot only implement the quantitative reconfigurability evaluations but also find the weak links, and therefore provides significant improvements for spacecraft reconfigurability design.