【作者】 王剑；

【导师】 谭建荣；

【作者基本信息】 浙江大学 ， 机械设计及理论， 2004， 硕士

【摘要】 开发鞋楦CAD系统对提高制楦乃至制鞋业的生产水平和效率具有重要意义。本文主要提出了两类定制鞋楦造型方法：基于脚部特征尺寸和基于脚部扫描模型的造型方法，并在此基础上完成了一个统一的鞋楦模型描述，实现了鞋楦模型尺寸的修改和基于控制点的交互式局部修改算法。 第一章，介绍了课题的研究背景和意义；对鞋楦CAD系统相关技术的研究进行了分析；指出了目前系统中存在的一些问题和不足；阐述了本文的研究内容与总体结构。 第二章，定义鞋楦模型尺寸信息；在不具备扫描设备的情况下，根据输入的脚部特征尺寸的信息确定相应鞋楦模型的尺寸，从而完成对鞋楦面初始模型的构造；通过对鞋楦初始模型的进一步修改，实现了设计人员对鞋楦的设计过程。 第三章，通过扫描脚部模型，建立脚部特征模型；确定与脚部特征模型对应的鞋楦特征模板，也就是曲面细分的初始网格；完成输入的鞋楦轮廓和特征模板的结合；利用初始网格和鞋楦轮廓，通过带有边界条件的曲面细分方法，实现了符合扫描脚部模型的定制鞋楦造型。 第四章，对生成或导入的鞋楦模型给出一个统一描述，包括曲面和特征两个方面的信息；其次，完成了通过改变尺寸数据进行鞋楦曲面扩缩的方法；最后，为方便设计人员调整部分曲面形状，还给出一个采用控制点调整的鞋楦面局部变形算法。 第五章，描述了所开发的定制鞋楦曲面造型系统的构架，并对系统的开发环境和用户界面进行了介绍；最后给出了部分软件功能应用实例。 最后，对本文的研究工作进行总结与展望。更多还原

【Abstract】 Developing the CAD system of shoe-last can greatly improve the management and efficiency of shoemaking industry. This thesis presents two kinds of custom shoe-last modeling methods. These methods are based on the feature size of human foot and foot range scanned data, respectively. Then, a uniform definition of shoe-last is implied on the shoe-last model. At last, two algorithms of shoe-last surface are presented.Chapter I introduces the research status of relative technology, analyses the problems and shortcoming existing in shoe-last system, describes the research contents and main framework of this thesis.Chapter II gives a definition of shoe-last size information, Firstly. With this information from user’s foot size, the system constructs the initial surface mesh. Finally, a shoe-last design process is completed though the shoe-last’s modification.Chapter III according to the input information of user foot scanned model, provides a foot feature template; after interacted with user, a last feature template is educed, which is the initial coarse mesh of subdivision; based on the combination of last feature template and last profiles, a variational subdivision scheme is introduced to construct shoe-last surface mesh.Chapter IV presents a uniform definition of shoe-last, which includes surface information and last feature information. Then we discuss the method of last modification based on this uniform definition: a global scale and a local deformation of surface are described, respectively.Chapter V describes the architecture of custom shoe-last system, introduces the development environment and user interface. At the end of this thesis, we provide the example of application.The remainder of this dissertation summarizes the research work and gives the future works of this research.更多还原