尹周平
数字制造和电子制造领域
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- 姓名:尹周平
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
计算机辅助制造
- 研究兴趣:数字制造和电子制造领域
尹周平,1972年9月出生,工学博士、华中科技大学教授。1994年6月于华中科技大学(原华中理工大学)获机械电子工程专业学士学位,同年9月被保送为本专业硕士研究生,1996年9月开始直攻博士学位,2000年6月在华中科技大学获机械电子工程专业博士学位,博士论文获2003年全国优秀博士论文奖;2000年7月至2002年6月在华中科技大学控制科学与工程博士后流动站从事博士后研究工作,2002年6月出站后留校工作,任副教授。2004年6月晋升教授。1999年7-9月和2001年8-11月期间曾在香港城市大学从事访问研究。
主要从事数字制造和电子制造领域的研究,已在“Computer -aided Design”、“International Journal of Production Research”、《中国科学》、“International Journal of Advanced Manufacturing Technology”等国内外权威期刊上发表论文20余篇,其中SCI、EI收录18篇次,据不完全统计被国内外期刊和学位论文引用20余次,出版《机器人操作》、《数字制造基础》专著,获得2004年度国家科技进步二等奖、2003年度全国优秀博士论文奖、2002年度湖北省科技进步一等奖、2003年度教育部提名国家科学技术奖自然科学二等奖等重要学术奖励6项,并入选2004年度教育部首届“新世纪优秀人才支持计划”、2004年度教育部创新团队和2004年度湖北省杰出人才资助计划(即湖北省杰出青年基金)。2002年以来,作为项目负责人或主要研究人员成功申请国家自然科学基金重大项目、973项目、全国优秀博士论文专项基金、国家自然科学基金面上项目等项目。
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10
尹周平, ZhouPing Yin, Han Ding*, YouLun Xiong
Computer-Aided Design 33(2001)137-154,-0001,():
-1年11月30日
This paper presents a virtual prototyping (VP) approach for geometric mouldability analysis of near-net-shape manufactured parts. The geometric mouldability of a part depends on the geometry of the part and is affected by the number and types of undercut features. A virtual prototype (VP) of a mold, which is a realistic digital product model, is generated by combining automated and interactive approaches to evaluate the mouldability of a part in the early stages of the product development cycle. The automated approaches for generating a VP are proposed to construct the parting surface, cores and cavity of the mold based on the recognized undercut features. Interaction with the VP in the virtual reality environment allows the designers to evaluate the mouldability of a part in an intuitive way. A new volume-based feature recognition method and data structure using non-directional blocking graph (NDBG) have been developed to recognize both isolated and interacting undercut features in a uniform way. Firstly, a set of potential undercuts are generated by performing the regularized difference between the part and its convex hull. The optimal parting direction is then determined by minimizing the number of undercuts. Finally, undercut features are identi
Virtual prototyping, Mold design, Feature recognition, Geometric reasoning
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尹周平, ZhouPing Yin a, Han Ding b, *, HanXiong Li c, YouLun Xiong a
Computer-Aided Design 35(2003)37-56,-0001,():
-1年11月30日
This paper presents an approach to find feasible and practical plans for mechanical assemblies based on a connector-based structure (CBS) hierarchy. The basic idea of the approach is to construct plans for an assembly (i.e. the root node of the CBS hierarchy) by systematically merging plans for primitive structures in the CBS hierarchy, while the plans for primitive structures are built using one of three methods: by reusing the existing plans, by retrieving the stored plans, and by geometric reasoning. The input to the approach consists of the assembly solid model, the connector-based relational model (CBRM) graph, the spatial constraint graphs, and the selected base part for the assembly, all of which are assumed to be generated previously in an interactive and/or automated way. Then, a CBS hierarchy for the assembly is automatically derived from the input CBRM by firstly establishing its functional model, which is constructed from the CBRM by decomposing the assembly or resulted part sets with respect to their connectors. Based on the CBS hierarchy, a set of assembly precedence diagrams representing good plans for the assembly are generated by merging plans for primitive structures systematically in a bottom-up manner. It can be proved that the proposed approach is both correct and complete. To verify the validness and efficiency of the approach, a variety of assemblies including some complicated products from industry are tested in the experimental CBHAP planner.
Assembly sequence planning, Connector-based structure, Connector-based structure hierarchy, Geometric reasoning
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【期刊论文】A virtual prototyping approach to generation and evaluation of mechanical assembly sequences
尹周平, Z-P Yin*, H Ding, and Y-L Xiong
Proc. Instn Mech. Engrs Vol. 218 Part B: J. Engineering Manufacture,-0001,():
-1年11月30日
It is desirable to integrate assembly planning with design early in the product development process. Usually, assembly plans can be generated by using either automated or interactive approaches. However, both kinds of approach have limitations. Interactive approaches require extensive user input in the tedious form of answering questions, whereas automated approaches can only be applied to products with simple component configuration and geometry. Based on virtual prototyping (VP), an intuitive and efficient approach is proposed for assembly planning by combining the potential strengths of the two kinds of approach. The main idea of this approach is to extract human expertise of mechanical assembly from human-computer interaction, and then use it for the automatic generation and interactive evaluation of assembly sequences. To incorporate expert knowledge, one or a few initial sequences are firstly created in a teaching by showing way using the human-computer interface of virtual reality, where some intuitive and meaningful information such as motion path and assembly tool is captured automatically. Then, after representing assembly constraints as precedence expressions by reasoning about these initial sequences, all feasible sequences are generated efficiently based mainly on simply symbolic reasoning in place of costly geometric reasoning. In this way, the complexity of assembly sequence planning is reduced dramatically from seeking paths in a high-dimensional state space into a discrete graph-based searching problem. Finally, practical or good sequences are selected from the feasible sequences by exploiting the VP intuitive manipulation capability for judging the cost of a particular assembly operation. In the present authors' experience, VP-based interaction has been proven to be a powerful and intuitive paradigm for both generation and evaluation of assembly plans. The feasibility of the proposed method is demonstrated through an implemented prototypical system called VPASPE, which has been tested with some practical assemblies.
assembly planning,, virtual prototyping,, human-computer interaction,, geometric reasoning
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【期刊论文】Accessibility analysis in manufacturing processes using visibility cones
尹周平, YIN Zhouping, DING Han, & XlONG Youlun
SCIENCE IN CHINA (Series E), 2002, 45 (1): 47~57,-0001,():
-1年11月30日
Accessibility is a kind of important design feature of products, and accessibility analysis has been acknowledged as a powerful tool for solving computational manufacturing problems arising from different manufacturing processes. After exploring the relations among approachability, accessibility and visibility, a general method for accessibility analysis using visibility cones (VC) is proposed. With the definition of VC of a point, three kinds of visibility of a feature, namely complete visibility cone (CVC), partial visibility cone (PVC) and local visibility cone (LVC), are defined. A novel approach to computing VCs is formulated by identifying C-obstacles in the C-space, for which a general and efficient algorithm is proposed and implemented by making use of visibility culling. Lastly, we discuss briefly how to realize accessibility analysis in numerically controlled (NC) machining planning, coordinate measuring machines (CMMs) inspection planning and assembly sequence planning with the proposed methods.
accessibility analysis,, visibility cones,, C-space,, manufacturing processes.,
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【期刊论文】Geometric mouldability analysis by geometric reasoning and fuzzy decision making
尹周平, Zhou-Ping Yin a, Han Ding b, Han-Xiong Li c, *, You-Lun Xiong a
Computer-Aided Design 36(2004)37-50,-0001,():
-1年11月30日
This paper presents a methodology for mouldability analysis by finding the optimal cavity design scheme (CDS) based on manufacturing and cost considerations using part geometry, where a CDS refers to a combination of the parting direction, parting line (PL), and undercut features (UF). The methodology takes advantage of geometric reasoning and fuzzy evaluation, and consists of two main stages: (1) generating all possible design alternatives, and (2) choosing the best alternative. In the first stage, after recognizing the potential UF from the given part, a spherical arrangement is constructed by partitioning the unit direction sphere using outward normals of the part's surfaces with the property that each cell in this arrangement has a unique combination of PL and UF set. Thus all design alternatives can be identified in O
Geometric mouldability, Geometric reasoning, Fuzzy multiple attribute decision-making, Design for mouldability, Mold design
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【期刊论文】Mouldability Analysis for Near-Net-Shaped Manufactured Parts Using Freedom Cones
尹周平, Z. P. Yin, H. Ding, and Y. L. Xiong
,-0001,():
-1年11月30日
This paper presents a general methodology for analyzing mouldability of near-net-shaped manufactured parts based on part geometry. A freedom cone representing the aggregate of all possible instantaneous translation directions is introduced to describe geometric constraints. Using the concept of internal and external undercut, the part is divided into pockets in which freedom cones can be determined independently. Based on freedom cones, closed cavities, external undercuts and internal undercuts are identified and an optimal pair of main parting directions to minimise the number of side cores is obtained. By intersecting the freedom cones with a unit sphere, the developed algorithm can be implemented effectively on a PCbased system. The proposed methodology provides a link between part geometry and mould design and can be applied to design for mouldability (DFM) and automatic mouldability analysis in near-net-shaped manufacturing processes.
DFM, Freedom cones, Injection moulding, Parting directions
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尹周平, 熊有伦
半导体技术,2004,29(5):6~9,-0001,():
-1年11月30日
微装配是电子制造、微制造、机器人操作等制造领域的共性前沿技术之一,近年来得到了广泛的研究与应用。首先,指出了微装配技术与纳米装配技术的本质区别,阐明了尺度效应和粘附效应给微装配技术带来的问题与挑战;分别介绍了传统微装配技术和新兴自装配技术的最新研究进展,讨论了一些急待解决的关键技术问题;最后对微装配技术的研究趋势进行了展望。
微装配, 自装配, 粘附效应
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尹周平, 熊有伦
中国机械工程,2002,13(4):328~332,-0001,():
-1年11月30日
计算制造旨在解决制造系统和制造过程的计算复杂性问题,以实现产品快速开发。探讨了计算制造的基本概念、研究内容和典型问题,对计算制造的理论基础和体系结构进行了有益探索。详细讨论了支持产品快速开发的几个关键使能技术:几何推理、反求工程和虚拟原型,并扼要介绍了在这些方面的有关研究成果,为产品快速开发的研究提供了一些新的思路和方法。
产品快速开发, 计算制造, 几何推理, 反求工程, 虚拟原型
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尹周平, 徐敏, 丁汉, 熊有伦
中国机械工程,2004,15(2):139~142,-0001,():
-1年11月30日
建立了一种计算模型,用于计算基于毛细管力流体自装配系统表面自由能。运用数字图像处理中模板匹配的计算方法,实现了对任意复杂形状绑定点系统表面自由能的计算,进而仿真出表征能量状态与装配状态之间关系的能量地形图。通过分析能量地形图中对应于正确装配的全局能量陷阱和对应于误装配的局部能量陷阱,可以实现对系统装配效率的预测。
流体自装配, 毛细管力, 能量地形图, 建模与仿真
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尹周平, 丁汉, 熊有伦
中国科学(E辑),2003,33(11):979~988,-0001,():
-1年11月30日
可接近性是一种重要的产品特征,可接近性分析已成为解决不同制造过程中所出现的计算制造问题的有力工具。讨论了可达性、可接近性和可视性等概念之间的关系,提出了一种基于可视锥的可接近性分析一般方法。在点的可视锥基础上,定义了完全可视锥、部分可视锥和局部可视锥等几类特征可视锥,并给出了一个基于c-空间的可视锥计算方法。最后探讨了如何应用可视锥实现数控加工、CMM测量和装配顺序规划等制造过程中的可接近性分析。
可接近性分析, 可视锥, C-空间, 制造过程
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