This paper discusses the relationship between virtual manufacturing technology and virtual reality technology, the research status of virtual reality technology and the application of product design and manufacturing in virtual reality environment, and develops a parking garage parameter design system in virtual reality environment.
introduction
Virtual manufacturing technology uses computer technology to comprehensively model and simulate the production and manufacturing activities to be performed, including product design, processing, assembly, logistics, resource planning and deployment, organization and management. Simulate the shape and working condition of the product in real time during the design phase of the product, the manufacturing process, check the manufacturability and design rationality of the product, predict its manufacturing cycle and performance, so that the design can be modified in time to more effectively and flexibly organize production. Shorten the product development cycle and obtain the best product quality and benefits.
The functions of virtual manufacturing technology can be divided into: product-oriented virtual manufacturing technology and virtual manufacturing technology for production process organization management. The former focuses on the modeling and simulation of product design, manufacturing, use, inspection and evaluation, while the latter focuses on the modeling and simulation of production process planning, organization management, resource scheduling, logistics, information flow, etc.
Virtual reality technology is the use of computer technology to create a realistic virtual environment in which people's visual, auditory and tactile feelings are the same in the real environment, that is, the feeling of "immersive". People can immerse themselves in this environment and interact with the environment in real time. This is what it calls "immersion," "real-time," and "active interactivity." In this environment, the products designed, manufactured and used are not real objects, do not consume actual materials, and do not require equipment such as machine tools. He is just a so-called "digital product" of images and sounds. With this digital product, we can perform product appearance review and modification, assembly simulation and interference inspection, mechanical motion simulation, part processing simulation, and even product performance simulation and evaluation to design upstream of the product life cycle. The stage can eliminate the defects of the design, evaluate the feasibility and rationality of the processing, predict the cost and performance of the product, and propose measures and methods for modification. Virtual reality technology provides us with the best environment for implementing concurrent engineering, agile manufacturing, reducing errors and rework, shortening the development cycle and improving product quality. It can be seen that virtual reality technology is most closely related to product-oriented virtual manufacturing technology.
Virtual reality technology was just put forward in the 1980s. With the rapid development of computer technology, it was highly valued by people in the 1990s and quickly developed into a practical stage, especially in military and entertainment. Successful application is exciting. The current situation is that, on the one hand, the development of its software and hardware technology is changing with each passing day; on the other hand, the price of its software and hardware is surprisingly high, and the price is falling rapidly, and some technologies are still in their infancy, and they cannot Satisfactory, software features can not meet the needs.
On the basis of existing conditions and technologies, it is our responsibility to fully utilize the role of virtual reality technology and make a useful contribution to our manufacturing industry.
1. Basic requirements for virtual reality technology
From the way humans obtain information, vision is the most important. It accounts for 70% of the amount of information people get, followed by hearing, touch and taste. In order to achieve realistic effects and satisfy human visual and auditory habits, the image and acoustic response of the virtual environment are three-dimensional; in order to achieve real-time performance, the image should have a frame rate of at least 60 120 Hz, and it is also necessary to respond to people's manipulation at any time. Signal, the delay can not exceed 0.1 seconds. Therefore, virtual reality technology has high computational processing speed and display requirements for computers. Most systems and high-quality systems are developed on workstations and equipped with advanced graphics accelerator cards. However, in the past two years, the performance of the microcomputer has been greatly improved, and a higher quality virtual reality technology has been realized on the microcomputer. The cost reduction and the popularity of the microcomputer will greatly promote the application and development of the technology.
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