参数化设计中的动态约束迭代及静态因果分析技术

TECHNIQUES OF DYNAMIC CONSTRAINT ITERATION AND STATIC CAUSAL ANALYSIS FOR PARAMETRIC DESIGN

参数化设计以其强有力的草图设计和图纸尺寸驱动功能已成为实现产品的初步设计、系列设计以及变异式设计的核心技术．本文提出了解决参数化设计的动态约束迭代法以及静态因果分析法，其中动态约束迭代法通过迭代不断对约束进行求精从而最终使整个系统中的所有约束都得到满足，而静态因果分析法则通过分析约束以及被约束对象之间的关系将反映几何对象求解次序的因果关系直接计算出来．这两种参数化设计算法克服了现有参数化方法在功能、效率以及可靠性等方面存在的问题，因而能够较好地应用到实际系统中去．

Owing to its powerful sketching and dimension driven capabilities, parametric techniques become the key techniques to implement the primary design, family product design and variational design. This paper proposes two parametric design methods which overpass the existing ones in functionality, efficiency and reliability. The first method, called dynamic constraint iteration, solves the constraint system by constraint iteration and refinement, and the second method,called static causal analysis,directly computes the causality of the geometric elements by analyzing the relationships among the constraints and the geometric elements.