Development Of Drawing Process Simulation System Based On Virtual Reality

Virtual reality technology is currently being used in many fields.In recent years,the textile industry has also been introducing virtual technology,which is mainly used in equipment-related teaching,such as cognition of equipment and structure,teaching of principle and application,and teaching of process and operation,but rarely involves the study of related basic theories.Therefore,in this paper,taking the drawing process as an example,develops a virtual reality-based drawing process simulation system by deeply studying the parallelization theory,drawing process and virtual reality technology,and the specific work is as follows.First of all,this paper develops the overall framework design of the drawing process simulation system.According to the content and the characteristics of the user group,the basic functional requirements and performance requirements of the virtual system are summarized.The basic development route of the system is determined as follows: from preliminary preparation,3D modeling and optimization,virtual scene building,virtual simulation to test release.The system functional module framework is established,which includes six modules: drawing mechanism understanding,application of drawing principle,fiber straightening and parallel,drafting process design,drawing knowledge discussion and drawing comprehensive assessment.Then,the simulation of the principle of parallelism with fiber straightening is studied as an example.By analyzing the effects of drafting multiplier,grip distance,fiber length and hook straightening on the straightening effect of bent hook fiber under the ideal drafting model,the straightening process of bent hook fiber in one drafting is divided into three stages,and the motion time and motion speed of fiber body and bent hook part in these three stages are calculated to establish the whole process model of fiber motion in the drafting zone.Then,the simulation of bent hook fiber motion is done by particle rope model and joint rope model,and the simulation effect of joint rope model is more accurate and stable after comparison experiments.By applying the jointed rope model,setting the rope gravity as 1,joint resistance as 25,and the number of joints as 100,the bent hook fiber motion simulation was realized by controlling the starting and ending points,and the percentage error between the simulation value of straightness and the theoretical value was within 1%.Then the optimization of the drawing frame model is studied,including model structure optimization and color appearance optimization.Firstly,the modeling process is based on the drive system of FA320 A drawing frame.Using the idea of model simplification,the drawing frame model is established by using the method of subsection modeling.Then the batch processor is used to reduce the overall accuracy of the model,and the region merging method is used to remove the redundant triangular surfaces of the model.Through the optimization of the structure,the points of the drawing frame are reduced by 72%,the number of faces is reduced by 85%,the size of the system is reduced by 90%,and the loading speed is significantly improved.Then,based on CCS color system,a set of color matching methods suitable for drawing frame is established by using hue matching and hue matching methods.The main color,auxiliary color and decorative color are used for the color matching of the drawing frame.The primary color is light or soft blue or green,the secondary color is located in the tone triangle,and the primary color is adjacent to or similar to each other,and the embellishment color is pure red and yellow.Finally,the simulation system of drawing process is integrated.The simulation of drawing frame operation is realized by studying related technologies.Transform Rotate class script realizes the operation simulation of drawing frame transmission system.By analyzing the sliver motion track,a sliver motion simulation method combining static model with dynamic rope is designed.Then the scene light fusion and interface design are carried out to complete the construction and system development of the virtual scene.Finally,the virtual scene is packaged and released to realize the development of a complete drawing process simulation system.