Research On Dynamic Scheduling Method Of Flexible Manufacturing Shop For Aviation Structural Parts Based On Multi-agent

With the increasing demand of the performance of modern aircraft and the gradual development of the manufacturing industry to the direction of intelligence,the aviation manufacturing industry have entered a new stage of development.However,due to the late start of China’s aviation industry,the current degree of digitalization and informatization of aviation manufacturing intelligent workshop is low,the flexibility and extensibility of operation are not considered enough.The discrete manufacturing resources and data in the workshop are not fully utilized,the utilization rate of equipment and the overall production efficiency are not high.Shop scheduling is the core link of the whole manufacturing system.Optimizing the production scheduling process and realizing the orderly and efficient execution of the work in the intelligent shop is of great significance to shorten the production cycle,improve the production efficiency,and even the construction of an aviation power.In this paper,the flexible production shop of aviation structural parts is taken as the research object,and the Agent technology and the rule scheduling method are taken as the key technologies.The operation mechanism of different stages in the scheduling process is improved,and a dynamic scheduling platform with visual interaction is developed.Specific research contents are as follows:(1)A dynamic scheduling system for flexible manufacturing based on multi-agent system is built.According to the investigation results and the Agent modeling method,the types and responsibilities of each Agent are mapped by combining functions and physics.Contract net protocol is selected as the negotiation mechanism of multi-agent system,and on this basis,a basic architecture of flexible manufacturing dynamic scheduling system based on hybrid organizational structure is designed.(2)A dynamic scheduling strategy adapted to the machining environment of aeronautical structural part is designed.According to the machining characteristics of aeronautical structural parts,the operation mechanism of task decomposition,machine tool selection and task allocation in the scheduling process is improved,and a task decomposition mechanism based on process block,a machine tool selection mechanism based on machining accuracy and a dynamic time window scheduling method based on scheduling rules are formed.Then,by combining the above mechanism with the improved contract net protocol,the conventional scheduling strategy for the machining of aviation structural parts is formed.On this basis,the abnormal scheduling strategy based on the event-driven mechanism is designed to improve the robustness of the system.(3)A multi-agent dynamic scheduling platform for flexible manufacturing of aviation structural parts is developed.According to the actual scheduling process,the functional requirements of the scheduling platform are analyzed,and the software architecture of the platform and the design of My SQL database are completed.The JADE framework based on JAVA and the Swing toolkit are used to developed a dynamic scheduling platform with visual interactive interface,and two simulation experiments are designed to verify the validity of the platform.Finally,through the result analysis,the feasibility of the dynamic scheduling strategy in the aeronautical structural parts processing scenario is verified.