Proceedings International Conference on Shape Modeling and Applications最新文献_第2页

Modelling flexible parts for virtual reality assembly simulations which interact with their environment 为与环境相互作用的虚拟现实装配仿真建模柔性零件

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923405

J. Léon, U. Gandiaga, D. Dupont

{"title":"Modelling flexible parts for virtual reality assembly simulations which interact with their environment","authors":"J. Léon, U. Gandiaga, D. Dupont","doi":"10.1109/SMA.2001.923405","DOIUrl":"https://doi.org/10.1109/SMA.2001.923405","url":null,"abstract":"Within the scope of simulation of assembly/disassembly operations, flexible modelling for virtual reality environments is described. The study analyzes the adequacy of various mechanical models in the specific context of oil hoses. The model behaviour is checked against experiments for validation. As an issue of this comparison, a mechanical model is proposed through the concept of a dual mechanical approach. The adequacy of this last model is deduced from the experimental data. The mechanical model is coupled with a geometric model for free-form surfaces. The deformation criterion uses a functional based on the external forces applied to the mechanical model. This model is expressed as a prescribed displacement problem in order to obtain a more accurate model. The model proposed is also capable of handling interaction between the flexible area of the hose and rigid parts of its environment which model other components of an engine bay. To this end, the mechanical model is enriched with a contact boundary condition which preserves the coherence of the approach. The proposed approach is also a proposal for a methodology to model mechanical flexible parts for virtual reality applications. The model set up has been inserted into a virtual reality environment for efficiency evaluation.","PeriodicalId":247602,"journal":{"name":"Proceedings International Conference on Shape Modeling and Applications","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132257179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Shape matching: similarity measures and algorithms 形状匹配:相似性度量和算法

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923389

R. Veltkamp

引用次数: 510

On evolute cusps and skeleton bifurcations 关于演化尖和骨架分叉

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923384

A. Belyaev, S. Yoshizawa

引用次数: 13

Efficient use of the BlobTree for rendering purposes 高效地使用BlobTree进行渲染

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923402

M. Fox, C. Galbraith, B. Wyvill

引用次数: 12

The 'thermodynamics' of shape 形状的热力学

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923369

G. Wyvill, C. Handley

引用次数: 9

Automatic knot determination of NURBS for interactive geometric design 面向交互式几何设计的NURBS自动打结方法

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923398

Hui Xie, Hong Qin

{"title":"Automatic knot determination of NURBS for interactive geometric design","authors":"Hui Xie, Hong Qin","doi":"10.1109/SMA.2001.923398","DOIUrl":"https://doi.org/10.1109/SMA.2001.923398","url":null,"abstract":"This paper presents a novel modeling technique and develops an interactive algorithm that facilitates the automatic determination of non-uniform knot vectors as well as other control variables for NURBS curves and surfaces through the unified methodology of energy minimization, variational principle, and numerical techniques. Many geometric algorithms have been developed for NURBS during the past three decades. Recently, the optimization principle has been widely studied, which affords designers to interactively manipulate NURBS via energy functionals, simulated forces, qualitative and quantitative constraints, etc. The existing techniques primarily concentrate on NURBS control points. In this paper we further augment our NURBS modeling capabilities by incorporating NURBS' non-uniform knot sequence into our shape parameter set. The automatic determination of NURBS knots will facilitate the realization of the full geometric potential of NURBS. We also have developed a modeling framework which supports a large variety of functionals ranging from simple quadratic energy forms to non-linear curvature-based (or area-based) objective functionals.","PeriodicalId":247602,"journal":{"name":"Proceedings International Conference on Shape Modeling and Applications","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114871085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

Shape representation using space filled sub-voxel distance fields 形状表示使用空间填充子体素距离场

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923403

Mark W. Jones, Richard Satherley

引用次数: 31

Mechanically based design: adaptive refinement for B-spline finite element 基于机械的设计:b样条有限元的自适应细化

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923406

P. Kagan, A. Fischer, P. Bar-Yoseph

引用次数: 3

Local control for mesh morphing 网格变形的局部控制

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923392

M. Alexa

引用次数: 59

Machining feature-based comparisons of mechanical parts 基于机械零件加工特征的比较

Proceedings International Conference on Shape Modeling and Applications Pub Date : 2001-05-07 DOI: 10.1109/SMA.2001.923388

V. Cicirello, W. Regli

{"title":"Machining feature-based comparisons of mechanical parts","authors":"V. Cicirello, W. Regli","doi":"10.1109/SMA.2001.923388","DOIUrl":"https://doi.org/10.1109/SMA.2001.923388","url":null,"abstract":"Solid models are the critical data elements in modern computer-aided design (CAD) environments, describing the shape and form of manufactured artifacts. Their growing ubiquity has created new problems in how to effectively manage the many models that are now stored in the digital libraries of large design and manufacturing enterprises. Existing techniques from the engineering literature and from industrial practice, such as group technology, rely on human-supervised encoding and classification, while techniques from the multimedia database and computer graphics/vision communities often ignore the manufacturing attributes most significant in the classification of models. This paper presents our approach to the manufacturing similarly assessment of solid models of mechanical parts based on machining features. Our technical approach is three-fold: (1) perform machining feature extraction to map the solid model to a set of STEP AP 224 machining features; (2) construct a model dependency graph from the set of machining features; and (3) find the nearest neighbors to the query graph using an iterative improvement search across a database of other models. We also present empirical experiments to validate our approach using our testbed, the National Design Repository (). The contribution of this research is the first fully automated technique for machining feature-based comparisons of mechanical artifacts. We believe that this work can lead to radical changes in the way in which design data is managed in modern engineering enterprises.","PeriodicalId":247602,"journal":{"name":"Proceedings International Conference on Shape Modeling and Applications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130099184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 125