Satellite system multidisciplinary optimization method based on multi-model fusion

Abstract

The invention discloses a satellite system multidisciplinary optimization method based on multi-model fusion, and belongs to the field of spacecraft system design. The implementation method comprises the following steps: establishing a satellite system key subject analysis model, and optimizing a design variable by taking the satellite system quality as an objective function; in order to improve the solving efficiency of the system scheme optimization problem, a high-precision model and a low-precision model of the geosynchronous orbit transfer subject and the satellite platform structure subject are established, and a Co-kriging agent model is used for fusing model data with different precisions;, sequence filling sampling is carried out through multi-objective optimization with the expected improvement degree and the feasibility probability being comprehensively considered, then the design space is fully explored, and the Co-kriging agent model is updated and managed, so that a scheme which meets the task requirements of the satellite system and has the minimum total mass of the satellite is efficiently obtained, the calculation cost of satellite system optimization is reduced, and the optimization efficiency is improved. The method is helpful for solving the technical problems in other related engineering fields.

Description

Technical field [0001] The invention relates to a satellite system multidisciplinary optimization method based on multi-model fusion, and belongs to the field of spacecraft system design. Background technique [0002] The geostationary orbit (GEO) satellite system has been developed rapidly in the past few decades, and due to its advantages in the fields of earth observation, navigation and communication, it has received extensive attention from the world. In recent years, some all-electrically propelled geostationary satellites based on Boeing’s BSS-702SP platform, such as Asian Broadcast Satellite-3A (ABS-3A) and European Communications Satellite-115B (Eutelsat-115B), have been successfully developed. At present, the most advanced all-electric GEO satellite can use an efficient electric propulsion (EP) system to achieve all transfers and maneuvers, such as orbital climb, position maintenance and attitude control. Compared with the traditional chemical propulsion GEO satellite ...

AI Technical Summary

Problems solved by technology

However, due to the small thrust of the electric propulsion system (usually hundreds of mN), the all-electric propulsion satellite system often takes a long time to realize the orbit transfer from GTO to GEO (usually several months), which delays the operation and service time of the satellite to a certain extent.

In addition, a long orbit change period will also cause the satellite to repeatedly pass through the Van Allen radiation belt during the orbit transfer period, causing serious radiation damage to satellite system equipment such as solar cell arrays, thereby affecting the performance of the entire satellite system

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