语义特征建模系统中参数范围计算的研究

Research on parameter range computation in semantic feature modeling system

在语义特征CAD系统中,特征参数的确定是一个十分耗时且需要反复实验和调整的过程。为了在创建特征的同时能够迅速为设计者给出特征参数值的适当范围,提出了一种改进的方法。该方法使用特征语义表示法来描述产品特征的各种信息,简化了"细胞元"模型管理特征的各个面的策略,通过提取每个特征面的语义并计算特征面的语义约束条件,最终确定特征参数的精确范围。该算法不仅可以有效提高确定参数范围的速度和精确度,还可以大大提高语义特征CAD系统的性能。实验表明该算法具有更强的适应性和实用性。

In semantic feature CAD system,determining the parameter value of features is often a time-consuming operation, and is a trial-and-error process.To compute the parameter range rapidly when the feature is created,this paper presents an improved method.It describes the features’various information with feature semantic representation,simplifies the management strategy of feature’faces in the cellular model,extracts and computes the face semantics of all features.This method can not only increase the speed and accuracy of computing parameter range,but also enhance the efficiency of semantic feature CAD system.Experiments on computer show that this improved method is more adaptable and practicable.