Realization Technology of A New Virtual Environment for Large-Scale Complex Products Assembly

2010 ◽  
Vol 431-432 ◽  
pp. 305-308
Author(s):  
Ying Xue Yao ◽  
Yue Dong Lang ◽  
Ping Jun Xia ◽  
Peng Chen ◽  
Guo Hua Liu
Keyword(s):  
Virtual Environment ◽  
Large Scale ◽  
Calibration Method ◽  
Assembly Planning ◽  
Projection System ◽  
Complex Products ◽  
Immersive Virtual Environment ◽  
Spline Surface ◽  
Spherical Screen ◽  
Low Efficiency

To deal with the problems of complicated process, difficult operation and low efficiency for large-scale complex products assembly, a new immersive virtual environment (VE) with virtual reality (VR) technology is built in the process of assembly planning and training. The environment is composed of a free walk machine and spherical screen projection system. In this paper, a free walk machine with movement perception function is developed to achieve natural human-computer interaction. And an approach based on two viewpoints match is adopted to improve immersive effect of stereo projection in the projection system. On the basis of that, a geometry calibration method based on Bicubic NURBS(Non-Uniform Rational B-Spline) surface matching target-controlled dot-matrix is proposed to achieve non-distorted image on spherical screen. Finally, the environment is applied in the process of satellite assembly process planning, and the display result shows that the VE development is feasible and valuable.

scholarly journals Human-Scale Virtual Environment for Product Design: Effect of Sensory Substitution

2006 ◽  
Vol 5 (2) ◽  
pp. 37-44 ◽  
Author(s):  
Paul Richard ◽  
Damien Chamaret ◽  
François-Xavier Inglese ◽  
Philippe Lucidarme ◽  
Jean-Louis Ferrier
Keyword(s):  
Product Design ◽  
Virtual Environment ◽  
Large Scale ◽  
Haptic Feedback ◽  
Calibration Method ◽  
Open Loop ◽  
Tactile Feedback ◽  
Sensory Substitution ◽  
Human Scale ◽  
Different Parts

This paper presents a human-scale virtual environment (VE) with haptic feedback along with two experiments performed in the context of product design. The user interacts with a virtual mock-up using a large-scale bimanual string-based haptic interface called SPIDAR (Space Interface Device for Artificial Reality). An original self-calibration method is proposed. A vibro-tactile glove was developed and integrated to the SPIDAR to provide tactile cues to the operator. The purpose of the first experiment was: (1) to examine the effect of tactile feedback in a task involving reach-and-touch of different parts of a digital mock-up, and (2) to investigate the use of sensory substitution in such tasks. The second experiment aimed to investigate the effect of visual and auditory feedback in a car-light maintenance task. Results of the first experiment indicate that the users could easily and quickly access and finely touch the different parts of the digital mock-up when sensory feedback (either visual, auditory, or tactile) was present. Results of the of the second experiment show that visual and auditory feedbacks improve average placement accuracy by about 54 % and 60% respectively compared to the open loop case

Construction of a New Virtual Environment System for Assembly and Training of Complex Products

2008 ◽  
Vol 392-394 ◽  
pp. 590-595 ◽  
Author(s):  
Yue Dong Lang ◽  
Ping Jun Xia ◽  
P. Chen ◽  
Ying Xue Yao
Keyword(s):  
Large Scale ◽  
Assembly Planning ◽  
Hardware Cost ◽  
Complex Products ◽  
Time Interaction ◽  
System A ◽  
Projection Approach ◽  
Key Techniques ◽  
And Training ◽  
Free Activity

Virtual assembly (VA) is an important application for virtual reality (VR) technology in manufacturing industries that can supply an effective solution to actual assembly problem of products. According to the assembly characteristic of large-scale products such as airplane, rocket and satellite, etc, a new interactive VA environment system is constructed, and its architecture and related key techniques are studied. Considering human free activity in the system, a free-walking perception machine is developed. And a stereo projection approach based on a video generator is proposed to enhance real-time interaction and reduce hardware cost. Finally, those key techniques are successfully applied in the process of satellite assembly planning and training.

A Laser Tracking-Vision Guiding Measurement System for Large-Scale Parts Assembly

2013 ◽  
Vol 718-720 ◽  
pp. 868-874 ◽  
Author(s):  
Wen Sun
Keyword(s):  
Measurement System ◽  
Large Scale ◽  
Automatic Measurement ◽  
Calibration Method ◽  
Laser Tracking ◽  
Measurement Systems ◽  
Global Calibration ◽  
Real Time Tracking ◽  
Low Efficiency ◽  
High Degree

To address the problems of low efficiency, high cost and low automatic level existing in traditional laser tracking measurement systems, a laser tracking-vision guiding measurement system for large-scale parts assembly is introduced in this paper. The system is composed of mono-camera and a laser tracker, can fulfill real-time tracking and automatic measurement throughout the whole assembly process. A global calibration method based on public planes and a method for finding the 3D positions of the target reflectors based on monocular vision measuring are expounded. Mathematical model is established, measurement system is built, and the experiment is accomplished. The experiment result indicates that the proposed system features relative high degree of automation and high measuring speed, has future in practical application.

scholarly journals A New Virtual Environment System for Large-Scale Complex Products Assembly

2021 ◽  
Vol 1939 (1) ◽  
pp. 012016
Author(s):  
Tian Xiu ◽  
Lang Yue-dong ◽  
Wu Hong-wei ◽  
Yao Ying-xue
Keyword(s):  
Virtual Environment ◽  
Large Scale ◽  
Complex Products

Development of Virtual Sculpting System With Haptics in PowerWall 3-D Virtual Environment

2012 ◽  
Author(s):  
Xiaobo Peng ◽  
Blesson Isaac
Keyword(s):  
Virtual Environment ◽  
Large Scale ◽  
Force Feedback ◽  
Research Work ◽  
Interaction Technique ◽  
Complex Product ◽  
Virtual Sculpting ◽  
Immersive Virtual Environment ◽  
Large Size ◽  
3D Scene

This paper presents the research work on developing a virtual sculpting system with haptic interface integrated with PowerWall system for complex product design. The PowerWall is a large scale (10 ft by 7.5 ft) immersive Virtual Environment (VE). The approach is to apply virtual sculpting method by interactively carving a workpiece using a virtual tool. With the implementation of stereoscopic visual feedback and haptic force feedback in the PowerWall, the designer would appreciate a much better understanding of the 3D shape geometry and can explore through the 3D scene like he/she can do in the real world. The “hybrid interaction technique” is presented as solution to solve the mismatch between the small workspace of the haptic device and the large size of PowerWall system.

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.

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