A multi-disciplinary optimization method for satellite systems based on multi-model fusion

Abstract

The invention discloses a satellite system multidisciplinary optimization method based on multi-model fusion, which belongs to the field of spacecraft system design. The realization method of the present invention is as follows: by establishing the key subject analysis model of the satellite system, and taking the quality of the satellite system as the objective function, the design variables are optimized; in order to improve the solution efficiency of the system solution optimization problem, the present invention establishes the subject of geosynchronous orbit transfer and the satellite platform For the high-precision model and low-precision model of the structural discipline, the Co-kriging proxy model is used to fuse the model data of different precision, and the sequence filling sampling is carried out through the multi-objective optimization that comprehensively considers the expected improvement degree and feasibility probability, and then fully explores the design space to realize the Co-kriging agent model update and management, so as to efficiently obtain the solution that meets the mission requirements of the satellite system and the total mass of the satellite is as small as possible, reduces the calculation cost of satellite system optimization, and improves the optimization efficiency. The invention helps to solve technical problems in other relevant engineering fields.

Description

technical field [0001] The invention relates to a satellite system multidisciplinary optimization method based on multi-model fusion, belonging to the field of spacecraft system design. Background technique [0002] The Geostationary Orbit (GEO) satellite system has developed rapidly in the past few decades, and has attracted worldwide attention due to its advantages in the fields of earth observation, navigation and communication. In recent years, some all-electric geostationary orbit satellites based on the Boeing BSS-702SP platform, such as Asia Broadcasting Satellite-3A (ABS-3A) and European Communications Satellite-115B (Eutelsat-115B), have been successfully developed. Current state-of-the-art all-electric GEO satellites are able to use an efficient electric propulsion (EP) system for all transfers and maneuvers such as orbit climb, position keeping and attitude control. Compared with the traditional chemical propulsion GEO satellite system, the biggest advantage of t...

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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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