Research On Key Issues In Design Of Large Parabolic Cylindrical Antenna System Based On MBSE

Large parabolic cylindrical antenna have the characteristics of multi-disciplinary integration and structural complexity,ect.However,traditional system design methods have some problems in its design,such as complicated adjustment work,difficulty in design reuse and modification,etc.This paper introduces the MBSE method to discuss the key issues of its system engineering design.Firstly,based on the MBSE method,the 40m×44m large parabolic cylindrical antenna system modeling scheme is proposed and antenna design requirements analysis is carried out.According to the complexity of the antenna system,the concept of domain meta-model is introduced to construct three specific domain meta-models of antenna requirement domain,function domain and architecture domain.The specific modeling process of the antenna system is based on the forward design process,and the antenna system model is established to analysis the system traceability and change impact.Secondly,three specific domain meta-models of antenna system are established by UML class diagrams based on MDA and MOF.Sys ML is lightweight extended in the form of the stereotype,which include the type composition,flow information,interface and other aspects of the domain meta-model to form the profiles of requirement,function and architecture.This paper researches the specific modeling process of the antenna system,including requirement analysis,functional decomposition,architectural generation and traceability analysis,etc.,and analyzes the reasons and effects of requirement changes during the modeling process.The analysis of change impact and requirement coverage are carried out by establishing the requirement traceability matrix to identify the scope of change.This paper analyzes requirement traceability and realizes traceability in different dimensions through the combination of requirement traceability matrix and traceability diagram.Finally,based on forward design process and domain meta-model of antenna system,this paper carries out the system modeling of requirement,function and architecture of large parabolic cylindrical antenna.The working environment and main tasks of the antenna system are analyzed,and the requirements of the antenna system and stakeholder are organized,and the use cases and MOE are refined from the requirements.It decomposes top-level functional activities from use cases,such as antenna rotation,antenna observation and data transmission,ect.,and determines the overall behavior and status of the antenna.It performs function decomposition and function allocation of toplevel functional activities,and maps them to logical components such as mechanical structure unit,feed network unit,antenna calibration unit and servo control unit to generate a complete logical architecture.The physical architecture is generalized from the logical architecture to form a variety of physical architecture schemes.The TPM design of physical components and the establishment of mathematical model are used to analyze and calculate the design indicators.The requirement change analysis and model modification of antenna system modeling process are carried out,and the forward and reverse system traceability are established.Based on the antenna system domain meta-model,this paper presents the hierarchical model of large parabolic cylindrical antenna system and analyzes the systemic insufficiency in the traditional design,and establishes the antenna system requirement models,function models and architecture models.The requirements are verified through system traceability,which improves modeling efficiency and model reusability,and provides a reference for the system design of the special antenna for interplanetary exploration.