Realization and Application Method of Mechanisms Motion Simulation in Virtual Assembly System

2011 ◽  
Author(s):  
Zhixian Zhang ◽  
Jianhua Liu ◽  
Yang Liu
Keyword(s):  
Physical Simulation ◽  
Virtual Assembly ◽  
Assembly System ◽  
Prototype System ◽  
Mechanism Analysis ◽  
Motion Simulation ◽  
Application Range ◽  
Application Method ◽  
Assembly Simulation ◽  
Important Research Topic

In recent years, physical simulation is a new trend of virtual assembly (VA) technology. As a part of physical simulation, mechanisms motion simulation is an important research topic. In order to realize the mechanisms motion simulation in VA system, we presented the realization and application method of mechanisms motion simulation in virtual assembly system combining the prototype system, Virtual Assembly Process Planning (VAPP). We described the bottom framework of VAPP system used for mechanisms motion simulation. Then based on the support of bottom platform, we studied the realization method of mechanisms motion simulation and apply mechanisms motion simulation to virtual assembly simulation via some technologies in VAPP system. Our research shows that, simulating mechanisms motion in VA system not only realizes the visualization of mechanism analysis and simulation, but also improves the ability of analysis of VA system effectively and extends the application range of VA system.

Kinematics Analysis of Mechanisms Based on Dynamics Multibody Systems in Virtual Assembly Environment

2010 ◽  
Vol 102-104 ◽  
pp. 214-218
Author(s):  
Zhi Xian Zhang ◽  
Jian Hua Liu ◽  
Ru Xin Ning
Keyword(s):  
Multibody Systems ◽  
Multibody System ◽  
Virtual Assembly ◽  
Assembly System ◽  
Prototype System ◽  
Motion Simulation ◽  
Kinematics Analysis ◽  
Simulation Process ◽  
Dynamics Of Multibody Systems ◽  
Kinematics Parameters

In recent years, in view of the absence of kinematics analysis function of mechanisms in the virtual assembly system, the method of kinematics analysis of mechanisms based on dynamics of multibody systems in virtual assembly environment is presented. A mechanism is considered as a multibody system and the kinematics equations are established based on Descartes coordinate system. All the kinematics parameters, just like position, speed and acceleration, can be obtained through solving the kinematics equations. In addition, the realization method of mechanism motion simulation in virtual assembly system is also proposed which contains the hiberarchy, data structure, module classes and simulation process of the system. The method is implemented and validated based on the prototype system VAPP(Virtual Assembly Process Planning).

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.

Assembly-Design-Oriented Semantic Modeling and Assembly Configuration Simulation in Virtual Environment

2015 ◽  
Author(s):  
Xiumin Fan ◽  
Li Tian ◽  
Qichang He ◽  
Keyan Liu
Keyword(s):  
Virtual Assembly ◽  
Prototype System ◽  
Semantic Modeling ◽  
Assembly Design ◽  
Assembly Simulation ◽  
Assembly Features ◽  
Cad Models ◽  
Dynamic Assembly ◽  
Configuration Simulation ◽  
Product Assembly

Usually, virtual assembly simulation is based on fixed assembly relationships between parts which are extracted from product’s CAD models. And virtual assembly systems is mainly used to evaluate product assemblability. In order to enhance the function of virtual assembly system to more assembly-design-oriented, a method of dynamic assembly configuration based on part’s semantic modeling is presented. The part’s semantic model contains assembly features, semantic attributes and physical properties of a part. The uniformed part semantic information is defined based on part’s STEP models and described in XML format. Assembly process simulation for dynamic assembly relationship configuration is realized by semantic reasoning, such as the reasoning to determine mating parts, mating positions, construction/solving/navigation of geometry constraints, and generation and modification of assembly relationships. The method supports the assembly processes simulation from single parts to produce the entire assembly in the virtual environments and works without predefined associations between parts. A prototype system is developed and demonstrated with an excavator. The results show that different assembly configurations for product assembly design can be obtained and the assemblability can be evaluated during the virtual assembly simulation process.

Design and Development of Virtual Assembly Prototype System for CLEAR-I

2014 ◽  
Author(s):  
Leiming Shang ◽  
Zihui Yang ◽  
Jinbo Zhao ◽  
Tao He ◽  
Liqin Hu
Keyword(s):  
Virtual Assembly ◽  
Prototype System ◽  
Scene Modeling ◽  
Virtual Reality Technology ◽  
Assembly Simulation ◽  
Key Points ◽  
Chinese Academy Of Sciences ◽  
Academy Of Sciences ◽  
Preliminary Application ◽  
Subcritical System

China LEAd-based research Reactor (CLEAR-I), which is one part of Accelerator Driven subcritical System (ADS) proposed by Chinese Academy of Sciences. Assembly scenario simulation is part of the CLEAR-I R&D project, enabling their suitability for the environment or scenario key points to be verified, taking into account unexpected situations and providing technical answers. Based on virtual reality technology, a virtual assembly prototype system for CLEAR-I has been developed for training, ergonomics evaluation, safety and security purposes. Main capabilities of system include: 1) CAD-based virtual scene modeling; 2) immersive experience in virtual environment; 3) interactive virtual assembly simulation of complex components. The paper describes the system architecture, main methods and its preliminary application to CLEAR-I.

Portal Crane Virtual Assembly System Based on Virtools

2013 ◽  
Vol 694-697 ◽  
pp. 2423-2427
Author(s):  
Ming An Ni ◽  
Yu Ying Tan
Keyword(s):  
Design Process ◽  
High Precision ◽  
Collision Detection ◽  
Virtual Assembly ◽  
Building Blocks ◽  
Assembly System ◽  
Assembly Simulation ◽  
Physical Prototype ◽  
Interactive Experience ◽  
Portal Crane

Portal Crane with its large parts is inconvenient to achieve physical prototype assembly in design process because of its large span and high precision space assembly needs. Considering virtual assembly system can provide designers with specific modules library, person interactive experience and reliable assembly simulation, this paper modularized the MQ4025 Portal crane based on analysis of assembly needs, and accomplished corresponding modules modeling by Solidworks, developed a virtual assembly platform by Virtools, realized collision simulation between components and parts by Collision Detection Building Blocks in Virtools, performed a virtual assembly experiment on the platform. Result shows that the platform completes Portal Crane assembly in a shorter time than physical prototype assembly, and it completes the assembly simulation faster than other CAD software by invoking compositive modules library of Portal crane.

The Modeling and Locating Technology of Assembly\Disassembly Tools in Virtual Environment

2013 ◽  
Vol 483 ◽  
pp. 229-233
Author(s):  
Yi Liu ◽  
Shi Qi Li ◽  
Jun Feng Wang
Keyword(s):  
Real Time ◽  
Virtual Environment ◽  
Virtual Assembly ◽  
Vector Model ◽  
Assembly System ◽  
Virtual Scene ◽  
Matching Constraints ◽  
Point Vector

This paper presents a feasible approach for modeling and locating of assembly\disassembly tools in the virtual scene: First, a novel point-vector model for tool is presented by means of abstracting the locating constraints of tools; Then, the mapping relationship for locating constraints between tools and parts is detailed; Finally, the best matching constraints algorithm is proposed on basis of point-vector model, which can calculate the locating constraints to the triangle model of part in real time. The proposed method has been integrated in the virtual assembly system to solve practical assembly problems.

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.

Collision Detection

2011 ◽  
pp. 36-67
Author(s):  
Gabriel Zachmann
Keyword(s):  
Virtual Reality ◽  
Real Time ◽  
Collision Detection ◽  
Serious Games ◽  
Medical Training ◽  
Virtual Assembly ◽  
Virtual Objects ◽  
Enabling Technologies ◽  
Assembly Simulation ◽  
Physically Based

Collision detection is one of the enabling technologies in many areas, such as virtual assembly simulation, physically-based simulation, serious games, and virtual-reality based medical training. This chapter will provide a number of techniques and algorithms that provide efficient, real-time collision detection for virtual objects. They are applicable to various kinds of objects and are easy to implement.

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