基于图形识别的参数化设计与建库方法

研究了图形的结构约束与尺寸约束的自动识别和驱动求解机制等关键技术，采用了双向十字链表存储尺寸链稀疏矩阵并解决了其双向遍历问题，实现了复杂图形的完全参数化尺寸驱动以及多视图的联动，并对约束检测及约束修改提出了合理有效的方法。该方法为产品修改、仿型设计和变量化动态仿真设计提供了有效手段，特别是为系列化产品设计提供了一理想的参数化建库工具。

On Improving Dimensional Driving

In CAD/CAM, much interest has been centered on easily doing dimensionai driwhg. We propose a driving mechanism that can do this job effectively.Our idea of easy dimensional driving includes mainiy: (1) a driving mechanism of construction constraints and dimensional constraints, (2) automatic graphic recognition of constraints, (3) a bothway cross dimensional linked list for storing dimension sparse matrices and for recalling them, (4) a reasonable method of constraint consistence checking, (5) the linking of movement of 2D views, (6) a method for creating a sequence graphic library. It can solve the complete parametric design of any complex graph. It is suitable to: (1) series product design, (2) remodelling design, (3) comparative design for selecting the best one of severel schemes, (4) variable imitative design of movement mechanism. With it the design flexibility and efficiency are much improved.