【作者】 孙雅梅；

【导师】 胡平；

【作者基本信息】 吉林大学 ， 车身工程， 2008， 硕士

【摘要】 “基于NX的汽车视野检测工具开发及方法研究”针对目前汽车安全问题的不断提升和汽车企业缩短产品开发周期的需求,借助在现代车身设计中广泛应用的计算机辅助设计,在UG/NX开发平台上,运用UG/Open API、UG/KF、UI Component等二次开发技术,完成了汽车驾驶员360°范围内视野检测工具的开发,并对车身C柱和发动机罩的局部检测方法进行了研究。本文开发的汽车整体视野检测工具是在车身概念设计阶段,对已满足基本法规标准的车身设计模型进行前、后、侧及立柱四部分的直接视野检测,然后输出相应的测量值用于视野的评价。之后,文章又介绍了C柱和发动机罩这两个车身部件的视野检测工作,并对其视野检测方法进行了研究。本文通过研究汽车视野检测,讨论了基于NX的二次开发技术在车身设计中的应用,这种方法能够简化车身设计中的重复工作,从而提高车身的设计效率和设计质量。通过对所开发模块的测试,其测试结果验证了模块的实用性,也充分体现了该设计方法的优势。本文讨论的汽车视野检测工具及方法已经得到相关企业的使用认可,并在实际设计中得到了应用。更多还原

【Abstract】 Along with the increasing depth of automobile in people’s life, performance requirements of automobile have been constantly enhanced. Not only does it require automobile to have a beautiful shape, good power and economy, reliable operation stability, moreover to have a better field of vision performance. Vision performance of automobile is an important segment during the procedure of auto-body general layout. It directly influences automobile’s travel security, comfort and operational convenience. So, it requires that the body designers fully apply the modern body design methods and ergonomics theory in the body structure and internal layout design, and enable the drivers to obtain the best field of vision under certain conditions by the most comfortable sitting posture. Therefore, the checking and validating of automobile vision plays an important role in automobile field of vision’s design. In the conceptual design phase, it not only can judge the quality of driver’s vision, but also can evaluate the reasonableness of initial design and layout, and change the design size in time, if necessary. So the development and research of professional automobile vision checking and validating tools has the theoretical and practical significance.After understanding the domestic and foreign relevant theories of vision design, this paper focus the research content in the vision of 360°assessment, the front lower view of automobile and the BC pillar obstructions, which are researched few at present. Combining the computer-aided design, which widely used in modern body design, this paper utilizes UG/Open API, UG/KF, UI Component and so on re-development technologies in UG/NX development platform. It completes the development of automobile overall vision checking and validating tools, and researches on the vision design of auto-body C pillar and hood.The Unified Development Unit of UG/NX is user’s re-development platform offered by UGS. Using the open code that UG/NX provides, one can almost carry out all the functions existed in UG/NX. The design rule and experiences can be collected into the product model by using the KF language. Using UI Component, a good interface can be designed. In the development work of this paper, UG/Open API, KF and UI Component are used. The function and interface of modules can be achieved.This paper researches on automobile vision checking and validating in the conception design stage. The tool is used, to those which vision has been designed to meet basic standards body model, to check them the direct vision. The tool of the overall vision checking and validating is a rough check of 360°driver’s vision. The vision is divided into four parts, including front, rear, side and pillar, in order to measure the different angles or distances. In front vision, front upper angle, front lower angle, hood invisible distance and road surface invisible distance are measured. In rear vision, rear upper angle, rear lower angle, T/LID visibility consideration and road surface invisible distance are measured. In side vision, Dr side upper angle, Dr side lower angle, Asst side upper angle and Asst side lower angle are measured. About pillars, there are Dr side A-PLR obstruction angle, Asst side A-PLR obstruction angle, Asst side B-PLR obstruction angle, Asst side C-PLR obstruction angle, FR view angle, C-PLR(D-PLR) view angle and RR view angle to be measured. The completed module can automatically calculate and generate eye points through importing H-point and vehicle parameters. Then different eye points are selected to measure values. Partial vision checking and validating is a particular check after overall vision check. About the vision check of C-pillar, perspective is used to create the visible view with Motorcycle at passenger side, in order to evaluate C-pillar structure and location design. About the vision check of hood, an arithmetic of section curves to obtain tangent point is used. Through the obtaining limit line, the quality of hood vision design is evaluated. The two methods of partial vision checking and validating can be used not only in C-pillar and hood, but also in other parts of auto-body, even can be used for other transport vision design. The application of the two methods is relatively extensive.Conception design is very important for an auto-body design. Auto-body structure and most parameters could be determined in this phase, while some parameters would impact the validity and cycle of following work. In the other hand, the cost of conception design nearly comes to 70% of the total development’s. Changes in this phase are most easy to be carried out and lowest cost to be spent, while they would do best for save product’s cost. Therefore, concurrent engineering and cooperation could be used in this phase to consider product’s manufacturability, assembly and maintenance-ability. They would greatly help to reduce or avoid the following reduplicated work and shorten the development cycle.The re-development technique of auto-body based on NX is provided by UG/NX. It can simplify the repetition work in the body design, and help to realize cooperation in the design. This technique will improve the efficiency and quality of body design. Also it will shorten the development period and reduce the development cost. Finally, the test results confirm the module usability and fully manifest the advantages of this design method.Automatization and intelligentization of auto-body design are current pop topic. This paper mainly discusses the development and research of NX-based automobile vision checking and validating tools. It could be studied as a reference of auto-body design module development for conception design phase.更多还原