共查询到17条相似文献,搜索用时 68 毫秒
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现代产品几何技术规范(GPS)提出的操作及操作算子技术,为实现产品几何误差的数字化计量提供了必要的技术基础.研究分析了同轴度误差评定中的操作算子构成及选用原则,并给出最小二乘评定的数学模型.通过实例实现了阶梯轴的同轴度误差的数字化评定过程. 相似文献
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基于新一代GPS的空间直线度误差评定及其不确定度估计 总被引:4,自引:0,他引:4
基于新一代产品几何技术规范(geometrical product specification, GPS)的操作及操作算子技术评定空间直线度误差,给出最小二乘评定的数学模型;根据GUM(guide to the expression of uncertainty in measurement, GUM)建议的方法,导出该模型的不确定度估计公式.实验结果表明,新一代GPS利用操作及操作算子技术可以规范、准确、高效地实现空间直线度误差的评定,且可操作性强;提出的空间直线度误差最小二乘评定的不确定度估计,不仅保证了空间直线度评定结果的完整性和有效性,而且可对我国现行的直线度误差检测标准的应用进行有益的补充. 相似文献
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现代产品几何技术规范(GPS)中基于对偶性的操作技术及其应用 总被引:8,自引:4,他引:8
揭示现代产品几何技术规范(geometrical product specification and verification,GPS)中规范过程和检验/认证过程的物象对应关系,以及其表面模型存在着对偶性、操作技术存在着共性的内在规律性;井以几何误差的检验/认证过程为例,阐述利用操作及算子技术实现GPS计量过程数字化的可能性及应用规律;进一步明确基于对偶性的表面模型、操作及操作算子技术,对于实现GPS设计与计量的统一性、与CAX的集成性和数字化功能是至关重要的。 相似文献
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The current specification and verification of surface texture in international standards are considered to be too theoretical, complex and over-elaborate for industry. A functional approach that completely expresses the complicated surface texture knowledge for designers and engineers is often nonexistent on the shop floor. Based on Geometrical Product Specification (GPS) philosophy, this paper proposes an unambiguous expression schema of surface texture. The surface texture knowledge in design, manufacture and measurement is based on the general GPS matrix and structured by a categorical object model. Explicit specification and verification processes and the mapping between them are presented. The ultimate goal is to improve the collaboration and bridge the knowledge gap between design, manufacture and measurement of surface texture to reduce product development lead time and improve product quality and performance. 相似文献
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Flatness error evaluation and verification based on new generation geometrical product specification (GPS) 总被引:1,自引:0,他引:1
Xiu-Lan Wen Xiao-Chun ZhuYi-Bing Zhao Dong-Xia WangFeng-Lin Wang 《Precision Engineering》2012,36(1):70-76
New generation geometrical product specification (GPS) links the whole course of a geometrical product from the research, development, design, manufacturing and verification to its release, utilization, and maintenance. Measurement process is one of the most important part of verification/inspection in the new generation GPS. With the knowledge-intensive and globalization trend of the economy, unifying the evaluation and verification of form errors will play a vital role in international trade and technical communication. Considering the plane feature is one of the most basic geometric primitives which contribute significantly to fundamental mechanical products such as guide way of machine tool to achieve intended functionalities, the mathematical model of flatness error minimum zone solution is formulated and an improved genetic algorithm (IGA) is proposed to implement flatness error minimum zone evaluation. Then, two evaluation methods of flatness error uncertainty are proposed, which are based on the Guide to the Expression of Uncertainty in Measurement (GUM) and a Monte Carlo Method (MCM). The calculating formula and the propagation coefficients of each element and correlation coefficients based on GUM and the procedures based on MCM are developed. Finally, two examples are listed to prove the effectiveness of the proposed method. An investigation into the source and effects of different uncertainty contributors for practical measurement on CMM is carried out and the uncertainty contributors significant are analyzed for flatness error verification. Compared with conventional methods, the proposed method not only has the advantages of simple algorithm, good flexibility, more efficiency and accuracy, but also guarantees the minimum zone solution specified in the ISO/1101 standard. Furthermore, it accords with the requirement of the new generation GPS standard which the measurement uncertainty characterizing the reliability of the results is given together. And it is also extended to other form errors evaluation and verification. 相似文献
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现代产品几何技术规范(GPS)体系的理论基础及关键技术研究 总被引:9,自引:4,他引:9
针对传统的几何公差体系存在的突出问题,着重研究探讨新一代GPS标准体系的构成原理、基本准则、内在规律及应用特点;在此基础上,对该体系的理论基础及关键技术进行深入地研究和探讨,揭示并阐述其“一条主线(规范,模型)、两种关联(不确定度与操作算子)、三个创新(基于统计优化的不确定度理论及拓展技术、基于对偶性的模型与操作技术、基于应用数学的数字化描述技术)”的构造模式规律及本质特征;进一步明确新一代GPS体系在实现“功能—规范—检验,认证”全过程统—规范和数字化描述与集成控制方面的关键性(支撑)技术基础;并提出建立我国GPS体系的应对策略。 相似文献
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现代产品几何技术规范(GPS)体系及应用分析 总被引:3,自引:5,他引:3
现代产品几何技术规范GPS(dimensional geometrical product specification and verification)是ISO/TC213针对产品的设计与制造而规定的一系列宏观和微观的几何技术规范,是所有机电产品的技术标准与计量规范的基础。随着全球经济的发展和科学技术的进步,尤其是随着CAD/CAM/CAQ(computer aided design/computer aided manufacture/computer aided quality)的应用和发展,新工艺、新技术、新材料的应用以及加工精度从微米到纳米的提高,ISO/TC213 GPS也随之发生了巨大的变化,已经由以几何学为基础的第一代GPS,发展到以计量学为基础的第二代GPS。文中在阐述ISO/TC213 GPS标准体系的形成、特点及发展趋势的基础上,对其构成思路及矩阵模型进行深入分析和研究,进一步揭示出其新一代GPS标准体系的构造模式规律及本质特征。 相似文献