Results 1 - 10
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42
VADE: A Virtual Assembly Design Environment
- IEEE Computer Graphics and Applications
, 1999
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Virtual Reality as a Tool for Verification of Assembly and Maintenance Processes
- Computers & Graphics
, 1999
"... Business process re-engineering is becoming a main focus in today's e#orts to overcome problems and deficits in the automotive and aerospace industries (e.g., integration in international markets, product complexity, increasing number of product variants, reduction in product development time a ..."
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Cited by 32 (2 self)
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Business process re-engineering is becoming a main focus in today's e#orts to overcome problems and deficits in the automotive and aerospace industries (e.g., integration in international markets, product complexity, increasing number of product variants, reduction in product development time and cost).
Natural and Robust Interaction in Virtual Assembly Simulation
, 2001
"... Virtual assembly simulation is one of the most challenging applications of virtual reality. Robust and natural interaction techniques to perform the assembly tasks under investigation are essential as well as e#cient methods for choosing from a large number of functionalities from inside the virtua ..."
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Cited by 14 (2 self)
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Virtual assembly simulation is one of the most challenging applications of virtual reality. Robust and natural interaction techniques to perform the assembly tasks under investigation are essential as well as e#cient methods for choosing from a large number of functionalities from inside the virtual environment. In this paper we present such techniques and methods, in particular multimodal input techniques including speech input and gesture recognition for controlling the system. We address precise positioning by novel approaches for constraining interactive motion of parts and tools, while a new natural grasping algorithm provides intuitive interaction. Finally, sliding contact simulation allows the user to create collision-free assembly paths e#ciently. Preliminary results show that the array of functionality and techniques described in this paper is su#ciently mature so that virtual assembly simulation can be applied in the field. Keywords: Virtual prototyping, virtual reality, constraint-based interaction, physically-based interaction. 1
Haptic Feedback for Virtual Reality
, 1999
"... Haptic feedback is a crucial sensorial modality in virtual reality interactions. Haptics means both force feedback (simulating object hardness, weight, and inertia) and tactile feedback (simulating surface contact geometry, smoothness, slippage, and temperature). Providing such sensorial data requir ..."
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Cited by 11 (0 self)
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Haptic feedback is a crucial sensorial modality in virtual reality interactions. Haptics means both force feedback (simulating object hardness, weight, and inertia) and tactile feedback (simulating surface contact geometry, smoothness, slippage, and temperature). Providing such sensorial data requires desk-top or portable special-purpose hardware called haptic interfaces. Modeling physical interactions involves precise collision detection, real-time force computation, and high control-loop bandwidth. This results in a large computation load which requires multi-processor parallel processing on networked computers. Applications for haptics-intensive VR simulations include CAD model design and assembly. Improved technology (wearable computers, novel actuators, haptic toolkits) will increase the use of force/tactile feedback in future VR simulations.
Computing swept volumes
- Journal of Visualization and Computer Animation
, 1997
"... The swept volume problem is practical, dif®cult and interesting enough to have received a great deal of attention over the years, and the literature contains much discussion of methods for computing swept volumes in many situations. The method presented here permits an arbitrary polyhedral object (g ..."
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Cited by 11 (4 self)
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The swept volume problem is practical, dif®cult and interesting enough to have received a great deal of attention over the years, and the literature contains much discussion of methods for computing swept volumes in many situations. The method presented here permits an arbitrary polyhedral object (given in a typical boundary representation) to be swept through an arbitrary trajectory. A polyhedral approximation to the volume swept by this moving object is computed and output in a typical boundary representation. A number of examples are presented demonstrating the practicality of this method.
A Model for Capturing Product Assembly Information
"... The important issue of mechanical assemblies has been a subject of intense research over the past several years. Most electromechanical products are assemblies of several components, for various technical as well as economic reasons. This paper provides an object-oriented definition of an assembly m ..."
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Cited by 6 (1 self)
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The important issue of mechanical assemblies has been a subject of intense research over the past several years. Most electromechanical products are assemblies of several components, for various technical as well as economic reasons. This paper provides an object-oriented definition of an assembly model called the Open Assembly Model (OAM) and defines an extension to the NIST Core Product Model (NIST-CPM). The assembly model represents the function, form, and behavior of the assembly and defines both a system level conceptual model and associated hierarchical relationships. The model provides a way for tolerance representation and propagation, kinematics representation, and engineering analysis at the system level. The assembly model is open so as to enable plug-and-play with various applications, such as analysis (FEM, tolerance, assembly), process planning, and virtual assembly (using VR techniques). With the advent of the Internet more and more products are designed and manufactured globally in a distributed and collaborative environment. The class structure defined in OAM can be used by designers to collaborate in such an environment. The proposed model includes both assembly as a concept and assembly as a data
The Role of Non-Intrusive Operator Logging to Support the Analysis and Generation of Product Engineering Data Using Immersive VR
- Journal of Virtual and Physical Prototyping, Vol
"... Virtual reality (VR) has the potential to substantially alter the manner in which products of the future are engineered. Currently there are many applications of VR during the product engineering process from design and analysis through to process planning, assembly, machining and shop floor layout. ..."
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Cited by 5 (4 self)
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Virtual reality (VR) has the potential to substantially alter the manner in which products of the future are engineered. Currently there are many applications of VR during the product engineering process from design and analysis through to process planning, assembly, machining and shop floor layout. VR takes a multitude of forms, including immersive, desktop, augmented, and is rapidly developing as a tool that can be used in the engineering of products. This paper looks at the use of immersive VR as a tool for analyzing both design and manufacturing product engineering activities in a series of research projects involving assembly planning and cable harness design. It focuses particularly on the use of the non-intrusive logging of users in such environments as a means to obtaining a rich data source for activity analysis and its potential within computer integrated manufacturing environments as a means of providing downstream engineering data.
DETC06/CIE-99476 SHARP: A SYSTEM FOR HAPTIC ASSEMBLY & REALISTIC PROTOTYPING
"... Virtual Reality (VR) technology holds promise as a virtual prototyping tool for mechanical assembly; however, several developmental challenges still need to be addressed before virtual prototyping applications can successfully be integrated into the product realization process. This paper describes ..."
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Cited by 4 (3 self)
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Virtual Reality (VR) technology holds promise as a virtual prototyping tool for mechanical assembly; however, several developmental challenges still need to be addressed before virtual prototyping applications can successfully be integrated into the product realization process. This paper describes the development of SHARP (System for Haptic Assembly & Realistic Prototyping), a portable VR interface for virtual assembly. SHARP uses physically-based modeling for simulating realistic part-to-part and hand-to-part interactions in virtual environments. A dual handed haptic interface for realistic part interaction using the PHANToM ® haptic devices is presented. The capability of creating subassemblies enhances the application’s ability to handle a wide variety of assembly scenarios. Swept volumes are implemented for addressing maintainability issues and a network module is added for communicating with different VR systems at dispersed geographic locations. Support for various types of VR systems allows an easy integration of SHARP into the product realization process resulting in faster product development, faster identification of assembly and design issues and a more efficient and less costly product design process.
Combining Dynamic Modeling With Geometric Constraint Management To Support Low Clearance Virtual Manual Assembly,”
- ASME J. Mech. Des.,
, 2010
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