Research And Application Of Real-time Collision Detection Technology In Microwave Tube Simulation Environment

Collision detection is a key technology in the field of CAD/CAM,motion planning and virtual manufacturing.It can accurately detect collision and interference phenomena between objects and return relevant information.With the continuous development of computer performance,numerical modeling and simulation technology,computer-aided design technology in the field of microwave tubes has been widely used in the design and manufacturing process of microwave tubes,which can significantly improve manufacturing efficiency,reduce the risk of rework and optimize the performance of the simulation.In the microwave tube simulation environment,the collision detection problem between the solid models plays an important guiding role in improving the modeling design and assemble of the microwave tube,and ensure the rationality,feasibility and yield of the design and assemble of the parts of the microwave tube.This paper has conducted an in-depth research on the collision detection technology and modeling of the microwave tubes.On the basis of Microsoft Foundation Classes,the paper has integrated ACIS and HOOPS engines to independently develop a 3D microwave tube's modeling software platform.Based on this platform,the paper has designed an efficient hybrid bounding volume hierarchy structure to achieve collision detection between the components of microwave tube.The specific research content and innovation points are as follows:(1)The paper reviews and analyzes the research and development status of collision detection algorithms,summarize the existing problems and challenges of current research,and put forward the ideas and directions of the research in this thesis.(2)This paper research and analysis of the collision detection algorithm.In order to solve the limitation of real-time and accuracy of a single type of bounding volume algorithm,this paper introduces a hybrid bounding volume hierarchical algorithm which integrates AABB bounding volume and OBB bounding volume.In addition,GJK algorithm is used to calculate the separation distance and penetration distance of the model.Finally,the algorithm is tested in different scenarios to verify the performance and stability.(3)The simulation process of the microwave tube often requires iterative simulation by continuously adjusting the parameters such as size and position of the model according to the simulation results.Based on the ACIS geometric modeling engine,HOOPS graphics suite and VC++ software development technology,this paper independently developed a software platform for modeling of microwave tubes.This software includes a graphical user interface that responds to user operations,feature modeling system that performs geometric feature modeling and operating,and feature file read-write module that supports the read-write function of xml and sat file formats.(4)On the basis of the software platform,the hybrid collision detection algorithm is independently developed to realize the collision detection solver.The functions of this module include static collision checking,touch solution solving,closest distance calculation,interference checking and gap analysis,which verify the practicability and reliability of the algorithm in this paper.(5)Finally,interference check is performed on each component of the travelingwave tube to verify the applicability and reliability of the algorithm.In the basic interference inspection example,the interference between surface and surface of the electron gun models are detected;in the example of performing gap analysis on each component model of the traveling wave tube,the gap distance and interference phenomenon between the parts are detected,and the visualization Four types of interference results between microwave tube components are analyzed and reviewed.