首页|Survivability model of LEO satellite constellation based on GERT with limited backup resources

Survivability model of LEO satellite constellation based on GERT with limited backup resources

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Survivability is used to evaluate the ability of the satellite to complete the mission after failure,while the duration of maintaining performance is often ignored.An effective backup strategy can restore the constellation performance timely,and maintain good network communication performance in case of satellite failure.From the perspective of network utility,the low Earth orbit(LEO)satellite constellation survivable graphical eva-luation and review technology(GERT)network with backup satel-lites is constructed.A network utility transfer function algorithm based on moment generating function and Mason formula is proposed,the network survivability evaluation models of on-orbit backup strategy and ground backup strategy are established.The survivable GERT model can deduce the expected mainte-nance time of LEO satellite constellation under different fault states and the network utility generated during the state mainte-nance period.The case analysis shows that the proposed surviv-able GERT model can consider the satellite failure rate,backup satellite replacement rate,maneuver control replacement ability and life requirement,and effectively determine the optimal sur-vivable backup strategy for LEO satellite constellation with limi-ted resources according to the expected network utility.

survivabilitylow Earth orbit(LEO)satellite constella-tiongraphical evaluation and review technology(GERT)backup strategy

NIE Yuanyuan、FANG Zhigeng、LIU Sifeng、GAO Su

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College of Economics and Management,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China

Institute of Telecommunication Satellite,China Academy of Space Technology,Beijing 100094,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

7227112452232014720711117180112771671091

2024

10.23919/JSEE.2024.000089

系统工程与电子技术(英文版)
中国航天科工防御技术研究院 中国宇航学会 中国系统工程学会 中国系统仿真学会

系统工程与电子技术(英文版)

CSTPCD
影响因子：0.64
ISSN：1004-4132
年,卷(期)：2024.35(4)