Research And Application Of Model-Based Systems Engineering In Power System Of Small Electron Beam Welder

As intelligent manufacturing has become an important development strategy for building a strong manufacturing country,digital research and development means are gradually popularized as an advanced welding technology,and electron beam welding has been widely used in various high-precision welding industries.As an important part of an electron beam welder,the power supply of an electron beam welder belongs to a complex integrated electronic system.However,there are many problems in the design and development process of traditional document-based development methods,such as ambiguity of information,the difficulty of requirement verification and confusion of functional hierarchy.To solve the above problems,this paper introduces Model-based Systems Engineering(MBSE)into the digital design process of a small electron beam welder power supply and establishes the digital Model of the early design stage of a small electron beam welder power supply.Analyze and verify the correctness of the architecture model,and explore the digital power supply of the electron beam welder.Based on the customer contract,relevant standards and the electron beam welding machine principle,this paper determines the power demand analysis method.Based on the MBSE design theory,Arcadia is selected as the functional modelling method,and the early design stage of the power supply is divided into problem domain and solution domain analysis.A power analysis scheme is proposed,including demand modelling,functional architecture modelling,and simulation verification.Firstly,in the power problem domain analysis,customer requirements of the L1 layer and product requirements of the L2 layer are established according to the requirement analysis method,and these two requirements are taken as the input and basis of functional modelling and the power operation analysis and system analysis models are established.Secondly,in analysing the power solution domain,the logical architecture and physical architecture models of power supply are based on inheriting and iterating system elements and functions.Through logical functions and physical functions,the guidance generates the functional requirements of the power subsystem and the functional requirements of the components.On this basis,the non-functional requirements obtained from the decomposition of customer requirements of the L2 layer are supplemented,and a complete demand model is established.Finally,based on Capella,static and dynamic simulation verification of the power supply functional model was carried out to verify the functional interaction logic’s correctness in the power supply’s early design stage.Combined with the power demand and physical architecture model,a power system simulation model was built based on the Modlica language,and the simulation results met the power demand.The correctness and feasibility of the power architecture model are verified.In this thesis,the application of MBSE design theory in the design of a small electron beam welder power supply is studied,the digital model of the early design stage of a small electron beam welder power supply is established,and the correctness and feasibility of the power supply architecture model are verified by system simulation.The research results guide the later detailed design of the power supply and provide research ideas and a research basis for the digital strategy of the power supply of electron beam welder.