共查询到19条相似文献,搜索用时 187 毫秒
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基于灰色理论的产品寿命预测研究 总被引:6,自引:1,他引:5
为了向产品生命周期设计提供寿命信息,在基于特征的产品全生命周期设计集成信息模型的基础上,提出利用灰色GM(1,1)模型对少量已有同类产品的寿命数据进行预测,扩充样本量,由灰色关联度分析得出其最符合的分布类型,由此预测与产品生命周期设计相关的寿命指标值。同时,在VC++6.0环境下,开发了产品寿命预测模块,并给出了应用实例。 相似文献
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二次开发UG实现飞机操纵系统零件参数化设计与虚拟装配自动化 总被引:7,自引:0,他引:7
在对飞机硬式机械操纵系统组件功能和构造特点分析以及零件实体造型和参数化模型建立的基础上,采用UG二次开发工具UG/Open编程,通过编辑不同类型零件参数化模型的几何特征参数实现零件参数化设计;针对UG交互方式进行大型复杂系统虚拟装配存在的操作过程烦琐和重复性差等不足,基于已建立的零部件装配用方位参照信息开发实现装配过程中的零部件自动坐标定位并对虚拟装配过程加以记录,实现虚拟装配自动化。 相似文献
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以优化客户对绿色产品的满意程度为目标,在构建绿色产品的客户满意度模型和配置过程模型的基础上,提出一种面向多样性及绿色性需求满意的产品配置设计方法。采用模块化思想和通用物料清单方法建立了绿色产品结构模型,并利用环境化质量功能配置方法实现客户需求、绿色产品特性与绿色模块类特性的映射转化;结合生命周期评价的思路与方法,分析模块类实例生命周期各阶段的绿色特性,在对分析结果进行处理的基础上,建立面向多样性及绿色性需求满意程度最大化的绿色产品配置优化模型。以食品搅拌机为例,验证了所提出方法的可行性和有效性。 相似文献
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基于UG实体模型的特征信息提取技术研究 总被引:4,自引:0,他引:4
CAPP系统用“制造特征”来产生与零件加工探作相关的信息。然而,这些制造特征信息在传统的CAD系统中并没有明确的包含。本文尝试着集成特征识别技术和基于特征的设计技术实现从设计特征模型中提取出制造特征。而且,随着“全息模型”技术的发展,产品的三维设计模型中逐步包含了一些CAPP系统所必需的零件信息,如零件表面粗糙度、几何公差和基准等。本文也提出一种方法将它们从零件模型的工程数据库中提取出来。 相似文献
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Yu Suiran Wang ChengtaoSchool of Mechanical Engineering Shanghai Jiaotong University Shanghai ChinaKimura FumihikoDepartment of Precision Machinery Eng. University of Tokyo Tokyo - Japan 《机械工程学报(英文版)》2003,16(3):296-299
Various kinds of data are used in new product design and more accurate data make the design results more reliable. Even though part of product data can be available directly from the existing similar products, there still leaves a great deal of data unavailable. This makes data prediction a valuable work. A method that can predict data of product under development based on the existing similar products is proposed. Fuzzy theory is used to deal with the uncertainties in data prediction process. The proposed method can be used in life cycle design, life cycle assessment (LCA) etc. Case study on current refrigerator is used as a demonstration example. 相似文献
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模块化产品是由可拆卸的模块组成一这些模块可以独立制造,组装和维护。有些产品在退役时可以回收、可重用或者可再制造。模块化可以给产品生命周期方面带来很多好处,文中提出了一个面向生命周期工程的综合模块化设计方法。这个方法由三阶段组成:问题定义,联系分析和模块的形成。该方法定义了与设计目标相关的一些因素.通过联系分析把这些因素和设计元件关联起来,并把元件聚集成模块。 相似文献
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首先分析了参数化设计对企业产品设计的作用,其次对零件的参数化设计及组件的参数化设计的模型建立方法进行了研究,最后通过二次开发技术实现了零件及组件的参数化设计,为企业的产品快速开发提供了一种新的思路和方法。 相似文献
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Approximate Estimation of the Product Life Cycle Cost Using Artificial Neural Networks in Conceptual Design 总被引:7,自引:2,他引:5
K.-K. Seo J.-H. Park D.-S. Jang D. Wallace 《The International Journal of Advanced Manufacturing Technology》2002,19(6):461-471
In order to improve the design of products and reduce design changes, cost, and time to market, life cycle engineering has
emerged as an effective approach to address these issues in today’s competitive global market. As over 70% of the total life
cycle cost of a product is committed at the early design stage, designers can substantially reduce the life cycle cost of
products by giving due consideration to the life cycle implications of their design decisions. During the early design stages
there may be competing requirements. In addition, detailed information is scarce and decisions must be made quickly. Thus,
both the overhead in developing parametric life cycle cost (LCC) models for a wide range of concepts or requirements, and
the lack of detailed information make the application of traditional LCC models impractical. A different approach is required
because a traditional LCC method should be incorporated in the very early design stages. This paper explores an approximate
method for providing the preliminary life cycle cost. Learning algorithms trained to use the known characteristics of existing
products can perhaps allow the life cycle cost of new products to be approximated quickly during the conceptual design phase
without the overhead of defining new LCC models. Artificial neural networks are trained to generalise product attributes and
life cycle cost data from pre-existing LCC studies. Then, the product designers query the trained artificial model with new
high-level product attribute data to obtain an LCC for a new product concept quickly. Foundations for the learning LCC approach
are established, and then an application is provided. This paper has been developed to provide designers with LCC information
to guide them in conceptual design. 相似文献