A collisions evaluation method in virtual environment for collaborativeassembly

Shi, Jiancheng; Liu, Jianhua; Ru-xin, Ning; Hou, Weiwei

doi:10.1016/j.jnca.2013.01.003

Cited by 9 publications

(13 citation statements)

References 16 publications

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“…methods are tailored for assembly sequence planning and assembly simulation (Yu and Wang, 2013; Peng et al , 2010; Su, 2007; Ou and Xu, 2012; Xia et al , 2013). However, few works have been done to eliminate fake collisions caused by polygonal approximation errors (Shi et al , 2013; Zhang et al , 2017a, 2017b). On the other hand, current computer aided design (CAD) systems provide clearance analysis functions for collision detection.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Many studies on assembly simulation are carried out in a virtual environment and polygonal models are widely used (Peng et al , 2010; Shi et al , 2013; Tching et al , 2010; Liu et al , 2004). Collision detection in assembly simulation is still a problem because it cannot accurately reflect the collision states between physical models (Shi et al , 2013). One of the main reasons is that polygonal models’ inexact curve surfaces cause fake collisions in the simulation.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Therefore, we developed a method to discriminate fake interference for assembly sequence planning and assembly simulation. Compared with the current methods (Liu et al , 2004; Seth, 2007; Shi et al , 2013; Zhang et al , 2017a, 2017b), the proposed method has the following advantages: The proposed approximation zone model considers approximation level and position to accurately identify fake interference. Assembly collisions are evaluated through a series of surface-surface, surface-end face and end face-end face intersection test to reduce the computation. The interference information such as intersected regions, penetration depth and direction between intersected polygons can be obtained for further analysis. This method does not require auxiliary data such as assembly constraints and is easy to integrate with current collision detection methods. …”

Section: Introductionmentioning

confidence: 99%

“…Assembly sequence planning and assembly simulation help manufacturers explore the problems and optimize the process in early stages, so as to reduce assembly cost and lead time. Interference checking is significant to achieve this objective, which is mainly used to the following: solve or verify collision-free assembly paths of parts for assembly sequence planning (Yu and Wang, 2013; Moez et al , 2015); and detect and respond to collisions between models to stimulate realistic and natural assembly behaviors for assembly simulation (Peng et al , 2010; Shi et al , 2013). …”

Section: Introductionmentioning

confidence: 99%

“…detect and respond to collisions between models to stimulate realistic and natural assembly behaviors for assembly simulation (Peng et al , 2010; Shi et al , 2013).…”

Section: Introductionmentioning

confidence: 99%

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An interference discrimination method for assembly sequence planning and assembly simulation

Zhang

et al. 2020

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Purpose The purpose of this paper is to discriminate fake interference caused by polygonal approximation so as to achieve accurate assembly sequence planning and assembly simulation. Design/methodology/approach An approximation zone model is proposed to formulate polygonal approximation. Fake interference is discriminated from hard interference by evaluating if polygonal models intersect within corresponding approximation zones. To reduce the computation, the surface-surface, surface-end face and end face-end face intersection test methods have been developed to evaluate the intersection and obtain collision data. An updated collision detection algorithm with this method is presented, which is implemented by a system named AutoAssem. Findings This method has been applied to a set of products such as a valve for assembly interference matrix generation, static and dynamic collision detection. The results show that it ensures the accuracy of assembly sequence planning and assembly simulation for polygonal models. Practical implications This method facilitates assembly design in the virtual environment with polygonal models. It can also be applied to computer aided design systems to achieve quick and accurate collision detection. Originality/value Fake interference between polygonal models may result in serious errors in assembly sequence planning and assembly simulation. Assembly zone model and novel polygon intersection verification methods have been proposed to effectively tackle this problem. Compared to current methods, this method considers valid penetration direction and approximation difference, does not need to process complicated auxiliary data and can be easily integrated with current collision detection methods.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…detect and respond to collisions between models to stimulate realistic and natural assembly behaviors for assembly simulation (Peng et al , 2010; Shi et al , 2013).…”

Section: Introductionmentioning

confidence: 99%

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