Theoretical Foundations of Mechanical Tolerancing

9500140比斯加德这笔赠款提供资金，以发展机械和机电产品公差的理论基础。这一基础将以现代统计理论和决策理论为基础。它将提供一个框架，将问题的技术和经济方面统一起来。具体地说，该方法将考虑到来自原材料、制造过程和测量误差的未制造产品的内在变异性。此外，它还将纳入因偏离目标规格、制造和检查而造成的功能损失的成本信息。它将整合之前的几次提供基础的尝试，包括日本工程师田口博士的尝试。研究计划是从简单的问题开始建立统一的理论，并在与工业界合作的实际应用中测试这些想法时增加复杂性。如果成功，这项研究将为公差信息的工程交流带来一种更简洁的语言，避免目前的模棱两可；以安全、可靠和可预测的方式执行预期功能的产品的经济设计、制造和我们依赖于明确和明确的公差信息。此外，这项研究的成功完成将为工程师提供目前无法用于设计和评估公差性能的科学和数学工具。目前工程信息计算机化的趋势，特别是计算机辅助设计(CAD)和计算机辅助制造(CAM)工具的使用，需要一个理论和数学基础。如果这项研究取得成功，现有CAD/CAM工具的许多问题将得到缓解。

9500140 Bisgaard This grant provides funding to develop a theoretical foundation for the tolerancing of mechanical and electro-mechanical products. This foundation will be based on modern statistical theory and decision theory. It will provide a framework that unifies technical as well as economic aspects of the problem. Specifically the approach will take into account the inherent variability in maunfactured products coming from raw materials, maufacturing processes and measurement errors. In addition it will incorporate information about the cost of functional losses coming from deviating from target specifications, manufacturing, and inspection. It will integrate several previous attempts to provide a foundation, including that of the Japanese engineer Dr. Taguchi. The research plan is to build up a unified theory starting with simple problems and increase the complexity as the ideas are tested on practical applications in collaboration with industry. If successful, this research will lead to a more concise language for engineering communication of tolerance information that will avoid current ambiguities; the economic design, manufacturing, and us of products that perform the desired function in a safe, reliable, and predictable manner depend on clear and unambiguous tolerance information. Moreover, the successful completion of this research will provide engineers with scientific and mathematical tools not currently available for the design and evaluation of the performance of tolerances. The current trend toward computerization of engineering information and in particular the use of computer aided design (CAD) and computer aided manufacturing (CAM) tools necessitate a theoretical and mathematical foundation. If this research is successful many problems with current CAD/CAM tools will be alleviated.