Research And Application Of Online Real-time Assembly And Drive Technology For Digital Twin Virtual Entities

In the process of promoting the implementation of Made in China 2025,traditional manufacturing is continuously transforming into intelligent manufacturing.The significant feature of the new generation of automated intelligent equipment that distinguishes it from the traditional automated equipment is that it has a digital twin system.The digital twin technology will be widely used in the manufacturing process of intelligent equipment.At present,when the digital twin system is implemented at home and abroad,each device is still developed for individual simulation.The development of the traditional digital twin system still adopts the introduction of 3D model entities for the realization of virtual entities,and then the development of two-way data mapping and entity control for the virtual entities,which maximizes the cost of human and material resources.In order to build the virtual entity of digital twin system more efficiently,it is urgent to find a technology to build 3D simulation system quickly.In response to the above-mentioned problems of 3D simulation construction techniques for digital twin systems,the following research is done in this thesis.According to the reconfigurable conceptual model in the digital twin design standard,a Unity3D-based program runtime editing method is proposed to realize the reconfigurable capability of digital twin models by online real-time assembly of virtual entities.In order to reduce the errors caused by model stitching during model reconfiguration,the Unity3D-based Laplacian mesh processing technique is proposed.Combined with the grid editing in computer graphics to investigate the application of grid processing technology in model reconstruction in digital twin,the experiments show that the runtime editing technology has very strong editing ability for virtual entities.Based on the traditional digital twin architecture,a framework for rapid reconstruction of virtual entities in digital twin series products is proposed to solve the problem of long development cycle of digital twin systems for smart manufacturing devices.The framework implements runtime virtual entity editing technology and unified control interface technology,according to which the system implemented by the framework can import and load models at program runtime,and perform online real-time assembly and editing,and its virtual entity objects can be controlled and driven through the unified control interface and can be programmable for testing.In this thesis,we designed and implemented a digital twin system based on the framework,and used it to build and test a virtual entity for a six-axis industrial robot,using a dispensing module in a dual-line four-axis standard dispensing machine as the experimental object.The experimental study shows that the system based on this framework has the ability to quickly build and drive virtual entities corresponding to other cylinder and motor driven CNC machines or industrial robots.Finally,the rapidly reconfigurable digital twin system implemented in this thesis is initially used in production processes to help companies quickly bring cutting-edge technologies to a broad market at a lower cost and faster than competitors.Using the digital twin rapid build approach has the advantages of shorter development cycles,lower development costs,and lower technical requirements for secondary use compared to traditional digital twin development models.The framework can accelerate the adoption of digital twin systems across multiple other industries,including manufacturing.