System efficiency comprehensive evaluation method for navigation constellation

Abstract

The invention discloses a system efficiency comprehensive evaluation method of a navigation constellation, which comprehensively considers different interruption types such as short-term planned interruption, short-term unplanned interruption, long-term interruption and the like, and various factors such as average interruption interval time of a satellite, satellite development time, reliabilityof a carrier rocket, inter-satellite logic relation, spatial signal precision and the like, utilizes a generalized random Petri network to construct a single-rail availability model, utilizes random faults and loss faults to construct a single-satellite multi-parameter reliability model, utilizes a combined weighting method based on a game theory to construct a single-satellite capability model, utilizes a weighted product method to construct a single-satellite system efficiency model, comprehensively considers single-satellite system efficiency and inter-satellite logic relation, and utilizesa Bayesian network to develop navigation constellation system efficiency modeling, so that the system efficiency comprehensive evaluation of the navigation constellation can be realized; and the system efficiency comprehensive evaluation method of a navigation constellation method can provide quantitative basis for top-level design and running state evaluation of the satellite navigation system,and can be expanded to be applied to series constellations such as communication, remote sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation system effectiveness, and in particular relates to a system effectiveness comprehensive evaluation method of a navigation constellation. Background technique [0002] The system effectiveness of a navigation constellation refers to the degree to which a navigation constellation satisfies a set of specific mission requirements under specified conditions and within a specified period of time. The above-mentioned "specific tasks" include: precise orbit determination and time synchronization, uplink injection of navigation information, downlink broadcast of navigation information, system integrity monitoring, etc. Factors related to the system performance of the navigation constellation include: availability of single orbit, reliability of single satellite, capability of single satellite, logical relationship between satellites, etc. [0003] The navigation constellation has the characte...

AI Technical Summary

Problems solved by technology

In the actual operation process, the satellite, the launch vehicle, and the control section are linked to operate, and the performance, reliability, maintainability and support indicators are coupled, which brings great challenges to the effectiveness evaluation of the navigation constellation system.

In addition, the traditional system performance evaluation research mainly focuses on modeling research on the performance of a single satellite, less consideration is given to the correlation between satellite performance and reliability, maintainability and support, and less consideration is given to system performance modeling research at the constellation level

Images