Research On MES Reconfigurable Architecture And Key Technologies Based On Microservices

With the development of the fourth industrial Revolution,the competition among manufacturing enterprises is becoming increasingly fierce.Rapid response to market demand has become an effective way for enterprises to improve their competitiveness.Manufacturing enterprises urgently need to use information technology and the concept of advanced manufacturing to build the capacity of "production on demand".Manufacturing Execution System(MES)is one of the important parts of the production system,which plays a role in the connection between the planning resource layer and the field equipment layer in the production process.MES with strong reconstruction ability helps enterprises gain advantages in the fierce competition.At present,the development of MES generally adopts the monomer architecture.Although the monomer architecture is easy to develop and deploy,it also brings the problems of poor scalability,poor sustainable maintenance and poor reliability.In the face of rapid changes in market demand and manufacturing mode,the response ability of MES is weak.Microservice architecture achieves fine-grained decoupling of business functions and has the characteristics of strong scalability and decentralization,which provides technical support for rapid reconstruction of MES.At present,there are few studies on MES based on microservices,but some studies have problems such as subjective functional decomposition method and too fine decomposition granularity.In view of this,in order to realize the rapid reconstruction of MES in the face of demand as the goal,through the integration of micro-service technology,on the basis of the analysis of MES reconfigurable architecture,this thesis focuses on the decomposition granularity of MES micro-service,the layered reconstruction system of MES and other key issues,and carries out research on relevant technical methods.Technical verification was carried out through the development of prototype system,the details are as follows:(1)In view of the weak capability of MES reconstruction,the demand system for reconstruction is studied from the aspects of manufacturing mode,information technology and production flexibility,and the reconstruction objectives of modularity,integrability,loose coupling,adaptability,low cost and scalability are proposed,and the MES operating architecture based on microservices is designed.(2)Propose a quantifiable MES microservice decomposition method.Firstly,this thesis uses data Flow graph(DFD)modeling method to realize MES functional modeling by referring to ISA-95,Manufacturing Execution System architecture and other standards.Secondly,the dependencies between MES functions in DFD are evaluated by the data coupling analysis method designed in this paper,and MES functions are decomposed according to the dependencies.Finally,the functions decomposed by MES are clustered,and the coupling and cohesion indexes commonly used in software development are used to evaluate the clustering results of MES microservices,such as to obtain the optimal granularity of microservices,laying a foundation for the subsequent microservice business process reconstruction.(3)Design the MES hierarchical reconstruction system based on microservices.Firstly,combined with the three-layer architecture of microservice technology and software development,MES is divided into human-machine interface layer representing user-system interaction,business process layer representing process logic,and data access layer representing database connection and operation.Secondly,combined with the characteristics of microservice technology,a decoupled reconstruction model is designed for different levels of MES.Finally,through code reuse,interface mapping and other methods,the configuration and binding between different levels are realized,which improves the MES reconstruction ability for different requirements.(4)Based on the above research results,the development and implementation of MES prototype system based on microservices are realized by building a microservice development environment.Combined with the actual production background,the rapid reconstruction of MES data access layer,business process layer and human-machine interface layer is verified.The results show that MES based on micro-services can effectively support the demand of enterprises.