State-of-the-art virtual reality hardware for computer-aided design

1996 ◽  
Vol 7 (6) ◽  
pp. 457-465 ◽  
Author(s):  
Scott L. Springer ◽  
Rajit Gadh
Keyword(s):  
Virtual Reality ◽  
Computer Aided Design ◽  
State Of The Art ◽  
Computer Aided ◽  
Aided Design

Structural Analysis of Product and Computer-Aided Assembly Planning in AssemBL Software Package

2018 ◽  
pp. 11-33
Author(s):  
A. N. Bozhko
Keyword(s):  
Computer Aided Design ◽  
State Of The Art ◽  
Graph Model ◽  
Design System ◽  
Assembly Planning ◽  
Complex Products ◽  
Assembly Sequences ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

Computer-aided design of assembly processes (Computer aided assembly planning, CAAP) of complex products is an important and urgent problem of state-of-the-art information technologies. Intensive research on CAAP has been underway since the 1980s. Meanwhile, specialized design systems were created to provide synthesis of assembly plans and product decompositions into assembly units. Such systems as ASPE, RAPID, XAP / 1, FLAPS, Archimedes, PRELEIDES, HAP, etc. can be given, as an example. These experimental developments did not get widespread use in industry, since they are based on the models of products with limited adequacy and require an expert’s active involvement in preparing initial information. The design tools for the state-of-the-art full-featured CAD/CAM systems (Siemens NX, Dassault CATIA and PTC Creo Elements / Pro), which are designed to provide CAAP, mainly take into account the geometric constraints that the design imposes on design solutions. These systems often synthesize technologically incorrect assembly sequences in which known technological heuristics are violated, for example orderliness in accuracy, consistency with the system of dimension chains, etc.An AssemBL software application package has been developed for a structured analysis of products and a synthesis of assembly plans and decompositions. The AssemBL uses a hyper-graph model of a product that correctly describes coherent and sequential assembly operations and processes. In terms of the hyper-graph model, an assembly operation is described as shrinkage of edge, an assembly plan is a sequence of shrinkages that converts a hyper-graph into the point, and a decomposition of product into assembly units is a hyper-graph partition into sub-graphs.The AssemBL solves the problem of minimizing the number of direct checks for geometric solvability when assembling complex products. This task is posed as a plus-sum two-person game of bicoloured brushing of an ordered set. In the paradigm of this model, the brushing operation is to check a certain structured fragment for solvability by collision detection methods. A rational brushing strategy minimizes the number of such checks.The package is integrated into the Siemens NX 10.0 computer-aided design system. This solution allowed us to combine specialized AssemBL tools with a developed toolkit of one of the most powerful and popular integrated CAD/CAM /CAE systems.

A Quantitive Analysis on Virtual Reality-Based Computer Aided Design System Interfaces

Manufacturing ◽  
2002 ◽  
Author(s):  
Chi-Cheng Chu ◽  
Rajit Gadh
Keyword(s):  
Virtual Reality ◽  
User Interface ◽  
Computer Aided Design ◽  
Effective Interaction ◽  
Design System ◽  
Human Beings ◽  
Cad System ◽  
Computer Aided ◽  
Interaction Approach ◽  
Aided Design

In this paper, a series of interface tests on interaction approach for the generation of geometric shape designs via multi-sensory user interface of a Virtual Reality (VR) based System is presented. The goal of these interface tests is to identify an effective user interface for VR based Computer-Aided Design (CAD) system. The intuitiveness of the VR based interaction approach arises from the use of natural hand movements/gestures, and voice commands that emulate the way in which human beings discuss geometric shapes in reality. The focus of this paper is on determining a set of effective interaction approaches by using the combinations of auditory, tactile, and visual sensory modalities to accomplish typical CAD tasks. In order to evaluate the proposed interaction approach, a prototypical VR-CAD system is implemented. A series of interface tests were performed on the prototypical systems to determine the relative efficiency of a set of potential interaction approach with respect to specific fundamental design tasks. The interface test and its results are presented in this paper.

scholarly journals Integrated ARM big.Little-Mali Pipeline for High-Throughput CNN Inference

2021 ◽  
Author(s):  
Ehsan Aghapour ◽  
A. Pathania ◽  
Gayathri Ananthanarayanan
Keyword(s):  
Integrated Circuits ◽  
High Throughput ◽  
Computer Aided Design ◽  
Heterogeneous System ◽  
State Of The Art ◽  
Embedded Platform ◽  
Computer Aided ◽  
On Chip ◽  
Aided Design ◽  
Pipeline Design

<div>State-of-the-art Heterogeneous System on Chips (HMPSoCs) can perform on-chip embedded inference on its CPU and GPU. Multi-component pipelining is the method of choice to provide high-throughput Convolutions Neural Network (CNN) inference on embedded platforms. In this work, we provide details for the first CPU-GPU pipeline design for CNN inference called Pipe-All. Pipe-All uses the ARM-CL library to integrate an ARM big.Little CPU with an ARM Mali GPU. Pipe-All is the first three-stage CNN inference pipeline design with ARM’s big CPU cluster, Little CPU cluster, and Mali GPU as its stages. Pipe-All provides on average 75.88% improvement in inference throughput (over peak single-component inference) on Amlogic A311D HMPSoC in Khadas Vim 3 embedded platform. We also provide an open-source implementation for Pipe-All.</div><div>This paper is submitted to IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems (TCAD) as a transaction brief paper (5 pages).</div>

Interoperability of Assembly Analysis Applications Through the Use of the Open Assembly Design Environment

1998 ◽  
Author(s):  
Scott Angster ◽  
Kevin Lyons ◽  
Peter Hart ◽  
Sankar Jayaram
Keyword(s):  
Virtual Reality ◽  
Computer Aided Design ◽  
Data Exchange ◽  
Systems Design ◽  
Design Tools ◽  
Design Environment ◽  
Assembly Design ◽  
Computer Aided ◽  
Design Systems ◽  
Aided Design

Abstract The emergence of high performance computing has opened up new avenues for the design and analysis community. Integrated Product/Process Design techniques are allowing multi-functional teams to simultaneously optimize the design of a product. These techniques can be inhibited, however, due to software integration and data exchange issues. The work outlined in this paper focuses on these issues as they relate to the design and analysis of electro-mechanical assemblies. The first effort of this work is the creation of an open environment, called the Open Assembly Design Environment. The goal of this environment is to integrate the otherwise disparate assembly design tools using a central control system and a common set of data. These design tools include virtual reality based design systems, computer-aided design systems, design for assembly systems and process planning systems. This paper outlines the overall goals of the project, presents the architecture designed for the system, describes the interfaces developed to integrate the systems, and discusses the data representation requirements for a system integrating a virtual reality system with computer-aided design systems.

A Quantitative Analysis on Virtual Reality-Based Computer Aided Design System Interfaces

2002 ◽  
Vol 2 (3) ◽  
pp. 216-223 ◽  
Author(s):  
Chi-Cheng Chu ◽  
Jianzhong Mo ◽  
Rajit Gadh
Keyword(s):  
Virtual Reality ◽  
User Interface ◽  
Computer Aided Design ◽  
Potential Interaction ◽  
Design System ◽  
Human Beings ◽  
Cad System ◽  
Computer Aided ◽  
Interaction Approach ◽  
Aided Design

In this paper, a series of interface tests on interaction approach for the generation of geometric shape designs via multi-sensory user interface of a Virtual Reality (VR) based System is presented. The goal of these interface tests is to identify an effective user interface for VR based Computer-Aided Design (CAD) system. The intuitiveness of the VR based interaction approach arises from the use of natural hand movements/gestures, and voice commands that emulate the way in which human beings discuss geometric shapes in reality. In order to evaluate the proposed interaction approach, a prototypical VR-CAD system is implemented. A series of interface tests were performed on the prototypical systems to determine the relative efficiency of a set of potential interaction approach with respect to specific fundamental design tasks. The interface test and its results are presented in this paper.

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