GOALI: Collaborative Research: A Mode-Based Simulation Enabling Model and Methodologies for Geometric Variation and Tolerance Control

最后修改日期：06/15/09最后修改人：Christina L.布洛鲍姆 本GOALI奖的研究目标是建立几何尺寸公差（GD T）建模方法，以实现有效的GD T设计模拟，并开发概率GD T公差分析和综合方法。这项研究将导致公差建模方法，能够模拟随机变化，并将其纳入产品功能模型的概率设计，面对制造的不确定性。研究方法从单个复杂零件的公差建模发展到创建能够分析多个零件装配公差的模型。可扩展性包括几何公差建模的统一框架，几何公差表示和各种一维和二维几何特征的模型，统计模型参数估计，以及装配，新课程模型创建和实验室开发的公差分析和综合方法。如果成功的话，本研究的结果将填补计算机辅助公差设计（CAT）技术领域的空白，为GD T公差设计和质量保证提供实用的解决方案，并将传统的尺寸公差和启发式GD T设计转变为一个新的公差设计范式，具有严格的模型和方法基础。这项研究的结果通常适用于许多行业的高质量产品设计，例如航空航天，微机电系统（MEMS），替代能源（例如，燃料电池）、光学、汽车和造船等。其结果将加强学生的研究技能，并建立教师和学生的经验，和出版物。结果将被纳入新的教育课程和实验室实习，从而为机械和工业工程的学生提供实践培训。研究结果将通过专业学术和工业合作网络、工业案例研究、研讨会、出版物和专业会议广泛传播。

Last Modified Date: 06/15/09 Last Modified By: Christina L. Bloebaum Abstract The research objective of this GOALI award is to establish methods for modeling geometric dimensioning & tolerancing (GD&T) to enable effective GD&T design simulation, and to develop methods for probabilistic GD&T tolerance analysis and synthesis. The research will result in a tolerance modeling methodology that is capable of simulating random variations and incorporating them into product function models for probabilistic design in the face of manufacturing uncertainties. The research approach progresses from the development of tolerance modeling for a single complex part, to the creation of models capable of analyzing tolerances for multiple part assembly. Deliverables include a unified framework for geometric tolerance modeling, geometric tolerance representation and models on the various one-dimensional and two dimensional geometric features, statistical model parameter estimation, and tolerance analysis and synthesis methodologies for assembly, new curriculum model creation, and laboratory development. If successful, the results of this research will fill the vacancies in the state of the art of computer aided tolerancing (CAT) techniques, provide practical solutions for GD&T tolerance design and quality assurance, and shift the traditional dimensional tolerancing and heuristic GD&T design into a new tolerance design paradigm with a rigorous model and methodological basis. The results of this research are generally applicable to many industries for high quality product design, e.g. aerospace, Micro-Electro-Mechanical Systems (MEMS), alternative energy (e.g., fuel cells), optical, automotive, and shipbuilding, among others. The results will strengthen students' research skills, and build faculty and students' experience, and publications. Results will be incorporated into new educational curricula and lab practicum, thus providing hands-on training for students in mechanical and industrial engineering. The results will be disseminated widely via professional academic and industrial collaborative networks, an industrial case study, seminars, publications, and professional conferences.