产品概念结构设计中的公差进化模型和算法

在产品概念结构设计自动化技术基础上，研究了产品公差设计过程及其特点，提出了四层产品公差结构模型。应用局部公差分配模型与公差设计过程建立了全局公差优化理论模型，提出了以保证产品总精度需求为目标的概念结构设计阶段公差的同步设计算法。实例表明，提出的公差进化模型和算法，避免了人为建模工作，大大提高了公差设计效率和质量，为快速完成多方案的并行设计奠定了基础。

Tolerance Evolving Model and Algorithm in Conceptual Structure Design

The tolerancing process and its characteristics were studied based on the product conceptual structure design automation technology. A four layer product tolerance model was put forward. Then, a global tolerance optimizing theory model was built based on local tolerance allocation model and tolerance design process, which realizes the synchronization tolerance design in the phase of conceptual structure design in order to ensure the general precision requirements of the products. The example indicates that the tolerance evolving model and algorithm avoid the artificial modeling and improve tolerancing efficiency and quality greatly. The work also establishes a foundation for rapid multi_scheme concurrent design.