A Human-Centered Virtual Assembly System

2009 ◽  
Vol 16-19 ◽  
pp. 796-800 ◽  
Author(s):  
Peng Chen ◽  
Ping Jun Xia ◽  
Yue Dong Lang ◽  
Ying Xue Yao
Keyword(s):  
Motion Capture ◽  
Virtual Assembly ◽  
Optimization Method ◽  
Virtual Manufacturing ◽  
Assembly System ◽  
Assembly Process ◽  
New Approach ◽  
Assembly Operation ◽  
Assembly Design ◽  
Human Modeling

Virtual manufacturing technology has become an effective method for decision and planning in manufacturing. Due to ergonomics problems are widely concerned in assembly design planning, a human-centered virtual assembly system framework is proposed for ergonomics analysis for assembly operation in this paper. The six-layer framework integrates virtual human modeling, motion capture and recognition, ergonomics evaluation and virtual assembly process planning as an organic whole. Data exchanging and system function are discussed based on this framework. The work in virtual reality (VR) technology, motion capture technology, ergonomics method and optimization method for implementing the system is also described. The framework would provide a new approach for the combination of virtual manufacturing and ergonomics analysis in the future.

Virtual Assembly Operation Modeling Based on Colored Petri Net

2010 ◽  
Vol 431-432 ◽  
pp. 237-240 ◽  
Author(s):  
Peng Chen ◽  
Ping Jun Xia ◽  
Yue Dong Lang ◽  
Ying Xue Yao
Keyword(s):  
Petri Net ◽  
Early Stage ◽  
Virtual Assembly ◽  
Assembly System ◽  
Colored Petri Net ◽  
Stage Design ◽  
Assembly Operation ◽  
Cpn Tools ◽  
Early Stage Design ◽  
Mathematical Presentation

In this paper, a Colored Petri Net modeling method for early stage design of virtual assembly operation is presented. The characteristics of virtual assembly system, Petri Net and Colored Petri Net are analyzed. Some previous work in Petri Net application in assembly and virtual assembly system is discussed. The theoretical aspects of Colored Petri Net are introduced mathematically. Based on the mathematical presentation and the process of fasteners assembly operation, a Colored Petri Net model is constructed for the simulation of assembly operation in virtual environment. With CPN Tools software package, the simulation for evaluating the feasibility of modeling is implemented. It is demonstrated that the modeling approach can support the early stage design of virtual assembly system.

A Framework for Virtual Assembly Based on AR Environments

2014 ◽  
Vol 513-517 ◽  
pp. 854-857
Author(s):  
Kang Gao ◽  
Hai Lin Xu ◽  
De Ming Zhang ◽  
Zhuang Ouyang ◽  
Cheng Yang Wei
Keyword(s):  
Augmented Reality ◽  
Virtual Assembly ◽  
Assembly System ◽  
Application Framework ◽  
Software Framework ◽  
Operation System ◽  
Assembly Operation ◽  
Augmented Reality Technology

We had present a generic software framework introducing augmented reality technology into the virtual assembly system. The framework is built by the means of integrating OSG and osgART into the MFC application framework. On the basis, we developed an assembly operation system. We showcased the example applications, demonstrating the new possibilities created by augmented assembly.

Quantifying the complexity of subassemblies in a fully automated assembly system

2019 ◽  
Vol 39 (5) ◽  
pp. 803-812 ◽  
Author(s):  
Yicong Gao ◽  
Chuan He ◽  
Bing Zheng ◽  
Hao Zheng ◽  
Jianrong Tan
Keyword(s):  
Predictive Model ◽  
Design Stage ◽  
Design Solution ◽  
Assembly System ◽  
Assembly Process ◽  
Automated Assembly ◽  
Content Type ◽  
Dependency Matrix ◽  
Assembly Design ◽  
Main Challenge

Purpose Complexity is the main challenge for present and future manufacturers. Assembly complexity heavily affects a product’s final quality in the fully automated assembly system. This paper aims to propose a new method to assess the complexity of modern automated assembly system at the assembly design stage with respect to the characteristics of both manufacturing system and each single component to be mounted. Aiming at validating the predictive model, a regression model is additionally presented to estimate the statistic relationship between the real assembly defect rate and predicted complexity of the fully automated assembly system. Design/methodology/approach The research herein extends the S. N. Samy and H. A. ElMaraghy’s model and seeks to redefine the predictive model using fuzzy evaluation against a fully automated assembly process at the assembly design stages. As the evaluation based on the deterministic scale with accurate crisp number can hardly reflect the uncertainty of the judgement, fuzzy linguistic variables are used to measure the interaction among influence factors. A dependency matrix is proposed to estimate the assembly complexity with respect to the interactions between mechanic design, electric design and process factors and main functions of assembly system. Furthermore, a complexity attributes matrix of single part is presented, to map the relationship between all individual parts to be mounted and three major factors mentioned in the dependency matrix. Findings The new proposed model presents a formal quantification to predict assembly complexity. It clarifies that how the attributes of assembly system and product components complicate the assembly process and in turn influence the manufacturing performance. A center bolt valve in the camshaft of continue variable valve timing is used to demonstrate the application of the developed methodology in this study. Originality/value This paper presents a developed method, which can be used to improve the design solution of assembly concept and optimize the process flow with the least complexity.

Study on Desktop Virtual Assembly System for Interactive Assembly Process Planning

2010 ◽  
Vol 426-427 ◽  
pp. 371-375
Author(s):  
Dan Zhang ◽  
Guang Ming Jiao ◽  
Dun Wen Zuo ◽  
Jian Xie ◽  
J.P. Li ◽  
...  
Keyword(s):  
Process Planning ◽  
Process Design ◽  
Virtual Assembly ◽  
Data Conversion ◽  
Assembly System ◽  
Assembly Process ◽  
Assembly Process Planning ◽  
Key Technologies ◽  
Assembly Operations ◽  
Assembly Models

Aiming at the shortcomings of traditional assembly process design and immersive virtual assembly system, the architecture of Desktop Virtual Assembly System (DVAS) for interactive assembly process planning is presented. The key technologies such as data conversion and reconstruction of assembly models, assembly intention recognition and assembly control navigation are studied. The lightweight storage of assembly models’ data and the intelligent constraints recognition are realized. The problem of assembly operations resulted from the lack of immersion is solved by movement navigation. The algorithms were proposed and applied to the DVAS prototype, and an application case is studied to demonstrate the effectiveness of the system.

Implementation and Evaluation of Mixed Model Representation of Virtual Objects in a Haptic Based Virtual Assembly Platform

2017 ◽  
Author(s):  
Germánico González Badillo ◽  
Hugo I. Medellín-Castillo ◽  
Víctor E. Espinoza López
Keyword(s):  
Mixed Model ◽  
Virtual Assembly ◽  
Model Representation ◽  
Dynamic State ◽  
Assembly System ◽  
Assembly Systems ◽  
Assembly Process ◽  
Virtual Objects ◽  
Physics Simulation ◽  
Simulation Engines

Virtual assembly systems have become popular in recent years due to its ability to simulate natural interaction between parts and ease of manipulation by the user. One of the most relevant technologies used in virtual assembly systems are haptic devices that provide force feedback and allow simulating real word conditions, such as weight, inertia, texture and collisions. Physics simulation engines (PSE) are another important tool used to simulate a realistic behavior in virtual assembly systems by enabling the effect of gravity and collision response of the virtual objects, resulting in a real world behavior. However, the use of haptic systems together with physics simulation engines is costly in terms of computing resources. This cost is mainly associated to collision detection between virtual objects, and increases when the shapes represented within the PSE are more complex, resulting in a poor performance of the virtual assembly system, making very difficult to simulate the assembly of complex parts or use several parts in the assembly. The present work shows a new algorithm to simulate complex objects, by using a different representation of the same object according with its dynamic state during the assembly process. The results show that the use of mixed model representation reduce the computing time when assembling objects, thus improving the performance of the virtual assembly system and finally allowing a better comfort and performance of the user during the assembly process. The system HAMS (Haptic Assembly and Manufacturing System) was used for the experimental validation, also the simulation of four assembly tasks that simulate real assembly objects, has been conducted.

Turning-Milling Machining Center Headstock Assembly Design

2014 ◽  
Vol 971-973 ◽  
pp. 852-855
Author(s):  
Peng Liu
Keyword(s):  
Virtual Assembly ◽  
Assembly Process ◽  
Assembly Design ◽  
Machining Center

analyze the headstock structure and milling machining center, build a new assembly file; Will, in turn, components used in the assembly file is inserted into the assembly file. Using UG to complete the assembly process of virtual assembly, generate the explosion view.

Research on Force Feedback-Based Tool Operation in Virtual Assembly

2010 ◽  
Vol 29-32 ◽  
pp. 1046-1050 ◽  
Author(s):  
Cheng Jun Chen ◽  
Yun Feng Wu ◽  
Niu Li
Keyword(s):  
Force Feedback ◽  
Virtual Assembly ◽  
Assembly System ◽  
Assembly Operation ◽  
Motion Constraints ◽  
Operation Method ◽  
Initial Stage

To verify the accessibility and workspace of tool operation in virtual assembly system, this paper presented a tool-part operation method based on force feedback. According to characters of common tool-part operations, standard fastening tools and parts were modeled using features and parameters at initial stage. Then operator was enabled to conduct different kinds of fastening and unfastening operations in virtual assembly system by three steps namely identification, interactive positioning and operation. With feedback force, the operator can feel corresponding motion constraints of tool during virtual fastening and unfastening operation, so the immersion of virtual assembly operation is promoted.

Infact not fiction

1995 ◽  
Vol 15 (1) ◽  
pp. 34-34
Author(s):  
Clive Loughlin
Keyword(s):  
Assembly Line ◽  
New Product ◽  
Assembly System ◽  
Assembly Operation ◽  
Flexible Assembly ◽  
Change Mechanism ◽  
Assembly Operations ◽  
Shuttle System

Examines the development of a flexible assembly machine, GENASYS [Generic Assembly System] which has been designed to produce a range of components. The machine comprises two manipulator arms, a tool changer and a shuttle system for the pallets on which the assembly operations are performed. Each manipulator is able to select a different tool from a carousel tool change mechanism that can accommodate up to 20 different tools. The machine can easily be programmed for a specific assembly operation and low batch numbers can be produced economically. Timescales for the design and installation of the machine are considerably shorter than for a dedicated assembly line and once installed in a factory new product variants can be accommodated within very short timescales and with low‐retooling costs.

Research and Development of CA6140 Virtual Assembly System

2014 ◽  
Vol 621 ◽  
pp. 558-563
Author(s):  
X.M. Li ◽  
Ya Lin Shen ◽  
L.H. Zhu
Keyword(s):  
Employee Training ◽  
Virtual Assembly ◽  
3D Models ◽  
Assembly System ◽  
Motion Simulation ◽  
Virtual Technology ◽  
Working Principle ◽  
Programming Software ◽  
Indispensable Tool ◽  
Visual Basic 6.0

On the basis of analyzing assembly process of main structural components in CA6140 lathe, 3D models for those components were established with CAD software UGNX6.0. Virtual assembly and motion simulation of the structure parts were performed with virtual technology. A set of virtual assembly system of CA6140 engine lathe was developed with programming software Visual Basic 6.0. It contains six main modules about spindle box, feed box, apron, tailstock, turret, etc. Dynamic simulation and motion simulation of the corresponding components in entity lathe can be realized, respectively. And also, mechanical structure, working principle, assembly relation between different components and motion transmission process of the lathe can be realistically reproduced with the system. This virtual assembly system not only can be used to analyze and transform old products, but also can be used in new products development, and to some extent, can be used to replace the prototype. It is an indispensable tool in the employee training and mechanical engineering activities.

Study on Mixed Assembly Modeling of Rigid and Flexible Parts for Aerospace Product Virtual Assembly

2010 ◽  
Vol 431-432 ◽  
pp. 9-12 ◽  
Author(s):  
Dan Zhang ◽  
Dun Wen Zuo ◽  
Guang Ming Jiao ◽  
Jian Xie ◽  
Hua Lin Zhou ◽  
...  
Keyword(s):  
Hierarchical Model ◽  
Graph Model ◽  
Virtual Assembly ◽  
Assembly Process ◽  
Assembly Model ◽  
Assembly Modeling ◽  
Cable Harness ◽  
Modeling Process ◽  
Flexible Parts ◽  
And Storage

According to the characteristics of aerospace product, the model representation and storage of the rigid part and cable harness is proposed. The Dendritic Correlative Model of Mixed Assembly of Rigid and Flexible Parts (DCMMA-RFP) is introduced based on the hierarchical model and graph model. The assembly model which realizes the lightweight storage can clearly represent the hierarchy relation and assembly process of aerospace products. The assembly modeling process in the virtual assembly environment is detailed described. Finally the effectiveness of DCMMA-RFP is verified by an example.

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