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Distributed cooperative task planning algorithm for multiple satellites in delayed communication environment 被引量:2
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作者 Chong Wang Jinhui Tang +2 位作者 Xiaohang Cheng Yingchen Liu Changchun Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第3期619-633,共15页
Multiple earth observing satellites need to communicate with each other to observe plenty of targets on the Earth together. The factors, such as external interference, result in satellite information interaction delay... Multiple earth observing satellites need to communicate with each other to observe plenty of targets on the Earth together. The factors, such as external interference, result in satellite information interaction delays, which is unable to ensure the integrity and timeliness of the information on decision making for satellites. And the optimization of the planning result is affected. Therefore, the effect of communication delay is considered during the multi-satel ite coordinating process. For this problem, firstly, a distributed cooperative optimization problem for multiple satellites in the delayed communication environment is formulized. Secondly, based on both the analysis of the temporal sequence of tasks in a single satellite and the dynamically decoupled characteristics of the multi-satellite system, the environment information of multi-satellite distributed cooperative optimization is constructed on the basis of the directed acyclic graph(DAG). Then, both a cooperative optimization decision making framework and a model are built according to the decentralized partial observable Markov decision process(DEC-POMDP). After that, a satellite coordinating strategy aimed at different conditions of communication delay is mainly analyzed, and a unified processing strategy on communication delay is designed. An approximate cooperative optimization algorithm based on simulated annealing is proposed. Finally, the effectiveness and robustness of the method presented in this paper are verified via the simulation. 展开更多
关键词 Earth observing satellite(EOS) distributed coo-perative task planning delayed communication decentralized partial observable Markov decision process(DEC-POMDP) simulated annealing
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