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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2012, Vol. 33 ›› Issue (11): 2082-2092.

• Avionics and Autocontrol • Previous Articles     Next Articles

Emergency Scheduling of Earth-observing Imaging Tasks on High-altitude Airships

HE Chuan, QIU Dishan, XU Guang, ZHU Xiaomin   

  1. Key Laboratory of Information Systems Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2011-11-21 Revised:2011-12-24 Online:2012-11-25 Published:2012-11-22
  • Supported by:

    National Basic Research Program of China (97361361)

Abstract: The main constraints for the scheduling of a high-altitude airship (HAA) for imaging tasks in an emergency environment are analyzed, and a constrain satisfaction problem (CSP) model is built taking task benefit (TB) and road distance as optimization objectives. Specifically, considering the swinging capability of reconnaissance sensors, meta tasks are composed within the constraint of view coverage and resolution. In addition, this paper proposes the concepts of meta task and composite task, and then provides a composition method and its steps. The HAA scheduling task is divided into a main problem (task ranking) and a sub-problem (route choosing), which are employed in our proposed improved particle swarm optimization (IPSO) algorithm and key node search (KNS) algorithm to solve the scheduling issue. Meanwhile, such relevant operations as encoding, decoding, movement, chaos initialization and tabu search (TS) strategy, are introduced in detail. Through extensive simulation experiments, the effectiveness of the proposed algorithm is sufficiently verified.

Key words: high-altitude airship, scheduling, imaging reconnaissance, PSO algorithm, task composition, chaos

CLC Number: