基于工程语义信息和优先约束矩阵的装配顺序规划方法(英文)

Assembly Sequence Planning Method Based on Semantic Engineering Information and Precedence Constraint Matrix

虚拟装配作为虚拟制造业的一个重要分支,不仅为降低产品发展的成本和缩短上市时间提供了有效途径,还有助于提高产品自身质量。提出的装配顺序规划方法主要基于两个方面:一方面是从人机交互(HCI)对话框中获得的工程语义信息(SEI),另一方面是根据每个装配元件的配合约束关系、几何图形和拓扑信息、以及可移动方向集(MDS)推导出的优先约束矩阵(PCM)。在对原始干涉情况进行修正后,从工程的角度通过分析优先约束矩阵生成完备的可行甚至最优装配顺序并非难事。最后,将一个仿真模型引入对Pro/Engineer二次开发出的虚拟装配支持系统VASS2000,以验证该方法的有效性和实用性。

Virtual Assembly, a key branch of virtual manufacturing, not only provides an effective way to reduce cost of product development and shorten time to market, but also improves quality of product itself. An assembly sequence planning method mainly was proposed based on two parts： one is semantic engineering information （SEI） derived from human-computer interaction （HC1） dialogs, the other is precedence constraint matrix （PCM） deduced by each component ＂s mating constraint relations, geometric figure, topology information and movable direction set （MDS）. After modification of original interference, it is easy to generate all feasible even optimal assembly sequences according to PCM at the engineering point. In the end, a simulative model was taken to verify the method＇s validity in an application development system of Pro/Engineer （Pro/E） named virtual assembly support system （VASS） 2000.