Direct Engineering Analysis via Distance Sampling
Vadim Shapiro, University of Wisconsin - Madison
Dramatic advances in sensing technology, computing power, and special purpose hardware point to a new era in geometric modeling where point clouds and sampling increasingly dominate many traditional geometric representations and algorithms. By contrast, engineering analysis continues to rely on classical analytical formulations and mesh-based solution techniques, that require complex and error-prone conversions of geometric representations. A meshfree reformulation of engineering analysis leads to a solution procedure consisting of a sequence of geometric and functional sampling and composition steps, followed by solving a system of algebraic equations. The exposed computational pipeline is general in that it applies to any unambiguous geometric representation supporting point membership classification (PMC) and distance computations, and is efficient enough to compete with mesh-based techniques such as finite element analysis. The new approach allows computational engineering analysis in situ for a wide range of digitally acquired models, as well as traditional CAD designs.
Shape Similarity
Takis Sakkalis, Agricultural University of Athens
The growing number of digital 3D models available on the Internet and in databases of various companies have created a need for a fast, robust, shape based search engine for 3D objects. This is a problem of object matching. Object matching is a well-known area in CAD/CAM, computer vision, etc. with applications in such areas as copyright protection, automatic inspection, object recognition, medical imaging for diagnosis, therapy planning and 3D scene integration. Motivated by the above, the notion of shape similarity will be presented. This is based on the concept of ambient isotopy, a form of topological equivalence that is stronger than the typical homeomorphism of objects.
Spatially Realistic CAD from Multi-scale Bio-Imaging
Chandrajit Bajaj, University of Texas at Austin
The computational modeling, simulation and visualization of various living species at each of the molecular, cellular, tissue, organ scales, are progressively providing a better understanding of the structure-function relationships in the life sciences. Capturing interactions at each of these scales and between them, are furthermore critical to our attempts at diagnosing and combating disease. In this talk I shall present a combination of image and geometric processing algorithms for topologically accurate constructions of spatially realistic geometric models from multi-scale bio-imaging (e.g. Electron Microscopy, Computed Tomography and Magnetic Resonance Imaging). The multiscale models feature resolutions range from sub-nanometers to sub-meters. I shall also present applications for the use of these spatially realistic bio-models in anti-viral drug discovery, simulating electrical activity within local synaptic circuits of pyramidal neurons of the hippocampus, for understanding learning and memory processes, and the electro-mechanical dyamic modeling the human heart for a rapid diagnosis of arrythmias and related cardiovascular disease.
Optimization Driven Design: Unleashing Human and “Machine” Creativity
Michael Yu Wang, The Chinese University of Hong Kong
To improve product development efficiency and gain a competitive advantage, today’s engineering design needs untraditional product development tools. A design process driven by optimization can play an increasingly important role to accelerate innovation by unleashing human as well as “machine” creativity. Today, with advanced technologies for structural topology optimization, morphing, dynamic modeling in CAD, and flexible CAE, the computer is capable of generating conceptual designs as well as robustly optimized products. We strongly believe that the next frontier is the integration of the power of CAD/CAE and topology optimization technologies. This combination will make CAD a true design exploration, synthesis and multi-disciplinary design tool. It would mean high-performance product innovation and shorter time-to-market. This talk explores the technology opportunities and challenges in optimization driven design.
June 8-12, 2009 John Ascuaga's Nugget Hotel and Casino Reno, Nevada
INDUSTRY SPEAKERS
CAD'09 - networking Reno style in federation with UAV'09
TUTORIAL SPEAKERS
An Introduction to HOOPS with an Overview of Current Trends in CAD/CAM/CAE Graphics
HOOPS is a core 3D graphics engine used by over 200 developers of commercial CAD/CAM/CAE software, including Autodesk, SolidWorks, PTC, IronCAD, and ANSYS/Fluent. Through the free HOOPS.EDU program students, researchers and educators (including many attendants at this conference) are able to take advantage of this commercial-grade platform to dramatically accelerate the development of their prototypes, test harnesses and applications . We will introduce the audience to the key benefits of working with HOOPS and provide a demonstration. In addition, we’ll share the major graphics trends that we are seeing from our work with so many commercial software vendors. With Vista, Direct3D, OpenGL 2.0 (and 3.0), a rapid shift toward shader-based rendering, more powerful hardware, multi-core systems and the need to handle extremely large models, the industry is undergoing the largest transformation since the “standardization” on OpenGL in the mid 1990’s.
Issues with Downstream Use of 3D Engineering Geometry
David Kasik, The Boeing Company
Numerous domains create highly complex digital models. Examples include industrial CAD models of airplanes, ships, production plants, and buildings; geographic information systems; oil and gas exploration; medical imaging; scanned 3D models; un-organized information spaces; and high-end scientific simulations. The digital models may contain millions, even billions of 3D primitives. The primitives include points, surfaces, voxels, and higher dimensional data forms. As 3D models become the base for industrial design, downstream usage is moving from traditional, paper-based documents to electronic, 3D documents. Example downstream use ranges from assembly instructions to parts catalogs to training. 3D documents bring their own set of issues, including collecting and adapting the original 3D CAD data to specific downstream domains. This talk provides an introduction to the issues of moving data from engineering definition to multiple downstream domains. The issues will include data quality, data marshaling, and choice of appropriate display metaphor.
Making Great Ideas Reality
Seth A. Hindman, Autodesk,Inc.
The state of today's economy is pushing companies to change the way they think, develop product and leverage their investments. For CAD to remain relevant, it must address business challenges and cannot simply be cool technology. Digital prototyping must be instrumental in facilitating innovation, not relegated to tools that document it. The challenges of the smallest startup are the same as the largest global enterprise: How do I differentiate myself, control costs and get my products to market faster than my competition?
NURBS Modeling: Past, Present and Future
Robert M. Blomgren, Solid Modeling Solutions, Inc.
NURBS have become the de facto standards for modeling in virtually all computer supported design. This tutorial examines past achievements, surveys current efforts and looks into the future. The main components of the talk are: (1) Early CAD systems and aircraft design, (2) Communicating the design to subcontractors, (3) Boeing decides to build its own CAD system, (4) The formulation of Non-Uniform Rational B-Splines: NURBS, (5) Curve and surface intersections, (6) Trimmed surfaces, (7) Solid modeling, (8) Non-manifold boundary representations, (9) The limitations of NURBS, (10) The limitations of boundary representations, (11) What is next?
