Constellation backup strategy evaluation method and system based on random time Petri network

A backup strategy and random time technology, applied in satellite radio beacon positioning system, random CAD, space navigation equipment, etc., can solve problems such as unreasonable optimal design of constellation backup strategy

Active Publication Date: 2020-10-20
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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Problems solved by technology

[0004] The purpose of this application is to provide a constellation backup strategy evaluation method and system based on random time Petri nets, and then at least to a certain extent overcome the unreasonable problem in the optimization design of the constellation backup strategy in the related art, which is the basis for the constellation system structure. Provides basis for design and parameter selection

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  • Constellation backup strategy evaluation method and system based on random time Petri network
  • Constellation backup strategy evaluation method and system based on random time Petri network
  • Constellation backup strategy evaluation method and system based on random time Petri network

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[0071] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0072] Petri net is a networked information flow model, including two types of nodes, places and transitions, and at the same time, a Token distribution (identification) representing state information is added to the place set; Running states, transitions represent operations or events in the motion of the system.

[0073] As a modeling mechanism suitable for describing and analyzing systems with characteristics of concurrency, synchronization and conflicts, Petri nets are widely used in various fields because of their intuitive graphical representation capabilities and rigorous mathem...

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Abstract

The invention relates to a constellation backup strategy evaluation method and system based on a random time Petri network, and belongs to the technical field of constellation operation management. The method comprises the following steps: constructing a single-satellite STPN model and an orbital plane STPN model, and establishing a navigation constellation STPN model containing various backup strategies according to the single-satellite STPN model and the orbital plane STPN model; establishing an availability model according to the number of fault satellites in the navigation constellation STPN model and the constellation CV value, and establishing a cost model according to the operation cost of the navigation constellation STPN model; and evaluating the navigation constellation STPN model by adopting the availability model and the cost model, and determining a target backup strategy from a plurality of backup strategies according to an evaluation result. According to the method, theimpact of random and determined events in the constellation on the system is fully evaluated, the influence of different backup strategies on constellation operation parameters can be effectively analyzed, and a quantitative basis can be provided for design optimization of navigation constellation backup strategies.

Description

technical field [0001] The present application relates to the technical field of constellation operation management, in particular to a random time Petri net-based constellation backup strategy evaluation method and system. Background technique [0002] As a complex space system, the operation and management of navigation constellations face many challenges. During the operation of the navigation constellation, due to the limitation of its own life and reliability, as well as the influence of the complex and harsh space environment, the satellite will have short-term failures (recoverable failures) or long-term failures (non-recoverable failures), which will cause constellation service performance. Decline. Therefore, in order to meet the strict requirements of the availability, continuity and integrity of the navigation constellation system, it is necessary to adopt different backup strategies according to its actual conditions, so that when the satellites in the constella...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G01C21/24
CPCG01C21/02G01C21/24B64G1/1085B64G1/1078B64G5/00B64G1/363G06F30/18G01S19/02G06F30/22G06F2111/08G06Q10/06375
Inventor 胡敏王许煜李强李玖阳李菲菲赵玉龙张锐武暾
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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