共查询到20条相似文献,搜索用时 15 毫秒
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基于域结构模板的机械产品概念设计方案生成 总被引:9,自引:1,他引:8
在公理化设计(Axiomatic design)理论的基础上,研究了机械产品要领设计方案生成的几个关键技术。讨论了要领设计的顾客需求驱动问题,提出了一种解决策略;针对公理化设计理论的不足,提出了域结构模板的概念,对公理化设计进行了扩展,并在此基础上构造了概念空间和概念推理网络;通过约束推理从概念推理网络中提取出有效概念空间,并给出了有效概念空间的分解算法;基于概念图(Conceptual graphs)分析了方案中设计实体之间的功能联系。以高速链式平缝机为例对所述概念设计方案生成方法进行了验证。 相似文献
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本文在建立半空间分割法数学模型的基础上,通过实例研究其算法,为在CIMS环境下利用特征映射进行产品信息转换奠定了基础。 相似文献
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产品并行设计技术研究 总被引:11,自引:0,他引:11
本文提出了基于集成产品信息模型,实现产品并行设计的体系结构。在产品设计过程中采用分阶段策略,基于知识对产品设计进行评价,及时指导产品设计,从而优化产品及其设计过程。 相似文献
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XU Gening College of Mechanical Electronic Engineering Taiyuan University of Science Technology Taiyuan China GAO Youshan Department of Automotive Engineering Beihang University Beijing China College of Mechanical Electronic Engineering Taiyuan University of Science Technology Taiyuan China ZHANG Xueliang YANG Ruigang College of Mechanical Electronic Engineering Taiyuan University of Science Technology Taiyuan China 《机械工程学报(英文版)》2007,20(1):55-59
Hyperstatic structure plane model being built by structural mechanics is studied. Space model precisely reflected in real stress of the structure is built by finite element method (FEM) analysis commerce software. Mapping model of complex structure system is set up, with convenient calculation just as in plane model and comprehensive information as in space model. Plane model and space model are calculated under the same working condition. Plane model modular construction inner force is considered as input data; Space model modular construction inner force is considered as output data. Thus specimen is built on input data and output data. Character and affiliation are extracted through training specimen, with the employment of nonlinear mapping capability of the artificial neural network. Mapping model with interpolation and extrapolation is gained, laying the foundation for optimum design. The steel structure of high-layer parking system (SSHLPS) is calculated as an instance. A three-layer back-propagation (BP) net including one hidden layer is constructed with nine input nodes and eight output nodes for a five-layer SSHLPS. The three-layer structure optimization result through the mapping model interpolation contrasts with integrity re-analysis, and seven layers structure through the mapping model extrapolation contrasts with integrity re-analysis. Any layer SSHLPS among 1~8 can be calculated with much accuracy. Amount of calculation can also be reduced if it is applied into the same topological structure, with reduced distortion and assured precision. 相似文献
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基于功能构造的复杂产品进化设计基因模型 总被引:14,自引:4,他引:14
针对现阶段进化设计方法在设计理论上的不足,探索对进化设计模式以及进化设计系统进行完整描述和统一表达,给出了一种面向功能需求适应性设计模式的框架结构。以设计产品的功能构造为核心,利用功能矩阵将其需求进行数字化和形式化描述,对功能基因进行统一表达,通过模型协议规范复杂产品进化设计的相应过程,建立起进化设计的基因模型,并实现对织布机开口机构的设计。 相似文献
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基于改进Freeman-Newell模型的机械产品概念设计过程研究 总被引:3,自引:1,他引:3
在引入行为信息的基础上,对Freeman-Newell模型进行了改进,建立了基于功能和行为的载体认知模型,描述了设计过程中单元求解过程;基于该载体认知模型构造了概念设计过程模型-概念空间;采用布尔矢量/矩阵对概念空间中设计元素之间的关系进行了描述,使之便于计算机的表达和操作,在此基础上,给出了概念设计过程的形式化描述。最后以工业平缝机为例对所述模型和方法进行了说明。 相似文献