Design and simulation in SAR satellites' task planning system using genetic algorithm with entropy operator. Issue 7 (10th August 2021)

• Record Type: Journal Article
• Authors: Liu, Wan; Li, Zeyu; Chen, Li; Zhang, Dexin; Shao, Xiaowei
• Is Part Of: Aircraft engineering and aerospace technology. Volume 93:Issue 7(2021)
• Page Start: 1236
• Page End: 1242
• Publication Date: 2021-08-10
• Subjects: Aerospace engineering -- Satellite observation -- Task planning problem -- Improved genetic algorithm; Aerospace engineering -- Periodicals; Aeronautics -- Systems engineering -- Periodicals; Astronautics -- Systems engineering -- Periodicals; Airplanes -- Equipment and supplies -- Periodicals; Space vehicles -- Equipment and supplies -- Periodicals; Aerospace industries -- Periodicals; 629.1
• DOI: 10.1108/AEAT-11-2020-0247
• Languages: English
• ISSNs: 1748-8842

Abstract

Abstract : Purpose: This paper aims to innovatively propose to improve the efficiency of satellite observation and avoid the waste of satellite resources, a genetic algorithm with entropy operator (GAE) of synthetic aperture radar (SAR) satellites' task planning algorithm. Design/methodology/approach: The GAE abbreviated as GAE introduces the entropy value of each orbit task into the fitness calculation of the genetic algorithm, which makes the orbit with higher entropy value more likely to be selected and participate in the remaining process of the genetic algorithm. Findings: The simulation result shows that in a condition of the same calculate ability, 85% of the orbital revisit time is unchanged or decreased and 30% is significantly reduced by using the GAE compared with traditional task planning genetic algorithm, which indicates that the GAE can improve the efficiency of satellites' task planning. Originality/value: The GAE is an optimization of the traditional genetic algorithm. It combines entropy in thermodynamics with task planning problems. The algorithm considers the whole lifecycle of task planning and gets the desired results. It can greatly improve the efficiency of task planning in observation satellites and shorten the entire task execution time. Then, using the GAE to complete SAR satellites' task planning is of great significance in reducing satellite operating costs and emergency rescue, which brings certain economic and social benefits.