Reliability Modeling Method and Design Optimization Method of Multi-Layer Satellite System

Abstract

The invention discloses a multi-layer satellite system reliability modeling method and a design optimization method. The reliability modeling method includes: system structure decomposition: constructing several multi-layer satellite system elements in a bottom-up order Two-layer structure module; life information update: update the two-layer structure module according to the empirical life distribution in order from the bottom to the top layer, and obtain the system update life distribution; reliability modeling: calculate the system's life distribution according to the system update life distribution reliability. The multi-layer satellite system reliability modeling method of the present invention fully integrates the life information of each level, effectively integrates multi-source information, and realizes the consistency of uncertainty models of each level, thereby establishing a more accurate and reasonable reliability model, Provide model basis for reliability design optimization of satellite system. The multi-layer satellite system reliability design optimization method of the present invention optimizes design variables and reduces unnecessary waste of resources.

Description

technical field [0001] The invention relates to the technical field of satellite system reliability analysis, in particular to a multi-layer satellite system reliability modeling method and design optimization method. Background technique [0002] With the continuous improvement of satellite complexity and performance requirements, reliability has become an important design factor in the satellite design stage. When performing reliability modeling on satellites, there are often various lifetime distribution information in the system. Most of these life information comes from the judgment of experienced experts on systems, subsystems and components, or the results of statistical analysis based on on-orbit failure data. How to effectively integrate satellite multi-source life information and establish a more accurate reliability model so as to realize the optimization of satellite system reliability design is an urgent problem to be solved at present. [0003] Aiming at the ...

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Problems solved by technology

[0004] Through the analysis, it is found that the iterative update method proposed by Guo et al. cannot change the update distribution, and in the process of uncertainty propagation, errors continue to accumulate, resulting in a low accuracy of the updated distribution.

In addition, BMM and I-BMM are mainly aimed at the two-layer system structure, and are not suitable for multi-source information fusion and updating of complex satellite systems

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