Systems Engineering and Electronics ›› 2022, Vol. 44 ›› Issue (4): 1270-1281.doi: 10.12305/j.issn.1001-506X.2022.04.25

• Systems Engineering • Previous Articles     Next Articles

Multi-satellite emergency task scheduling with merging mechanism

Peng JIN1,2, Xiaoxi TANG1,2,*   

  1. 1. School of Management, Hefei University of Technology, Hefei 230009, China
    2. Key Laboratory of Process Optimization and Intelligent Decision-making, Ministry of Education, Hefei 230009, China
  • Received:2021-03-17 Online:2022-04-01 Published:2022-04-01
  • Contact: Xiaoxi TANG

Abstract:

Based on the principle of priority scheduling of emergency tasks, it is an urgent problem in the field of multi-satellite emergency task scheduling to minimize the perturbation to the original scheduling sequence on the basis of ensuring the total revenue of observations. Firstly, the relationship between the completion time and the observation revenue of emergency tasks is considered, and a mathematical programming model with time-dependent revenue is established. Besides, a multi-satellite emergency task scheduling algorithm with the merging mechanism based on the genetic algorithm is proposed. In the devised algorithm, task merging operator, task insertion operator and task replacement operator are designed to insert emergency tasks; the fitness function is designed by combining the observation revenue, sequence perturbation and minimum observation time; crossover operator, mutation operator and global repair operator are proposed to iterate and optimize scheduling sequences. Finally, numerical experiments indicate that the designed algorithm can significantly improve the scheduling quality, which is suitable for the multi-satellite emergency task scheduling problem.

Key words: earth observation satellite, emergency task, genetic algorithm, merging mechanism

CLC Number: 

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