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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2013, Vol. 34 ›› Issue (5): 1151-1164.doi: 10.7527/S1000-6893.2013.0204

• Electronics and Control • Previous Articles     Next Articles

Multi-satellite Dynamic Scheduling Method for Emergencies

WANG Jianjiang1, ZHU Xiaomin1, WU Chaobo1,2, QIU Dishan1   

  1. 1. Science and Technology on Information Systems Engineering Laboratory, National University of Defense Technology, Changsha 410073, China;
    2. No.95246 Unit, People's Liberation Army of China, Beihai 536000, China
  • Received:2012-06-13 Revised:2012-11-29 Online:2013-05-25 Published:2013-01-09
  • Supported by:

    National Natural Science Foundation of China (61104180, 71271216);National Basic Research Program of China (6136101)

Abstract:

To solve multi-satellite dynamic scheduling problems in emergency, a multi-objective mathematic programming model is established in this paper. A novel task merging strategy is proposed for multiple imaging satellites: a multi-satellite multi-orbit task merging graph (MSMOTMG) model is established and a task merging algorithm—CP-TM is proposed. In addition, a rehabilitation technique based on task decomposition is suggested to overcome the disadvantage that task merging may cause tasks to have less imaging opportunities. To further enhance the schedulability, the backward shift of tasks in the waiting sequences is considered in our study. Furthermore, a novel dynamic algorithm called TMRBS-DES is presented, which comprehensively considers the task merging, rehabilitation and backward shift. Extensive experiments by simulations are conducted to compare TMRBS-DES with an existing algorithm—RBHA as well as three baseline algorithms—BS-DES, TMR-DES and TMBS-DES. Experimental results demonstrate that TMRBS-DES improves the scheduling quality and is suitable for multi-satellite dynamic scheduling in emergency.

Key words: imaging satellite, dynamic emergency scheduling, mathematical model, task merging, backward shift, rehabilitation, heuristic algorithm

CLC Number: