GOALI: Volumetric Error Analysis of Machine Tools

这个学术联络与工业（GOALI）项目的研究目标是为机床校准和几何误差补偿创建一个新的、可行的范例。传统的校准技术使用激光干涉仪在非常窄的机床操作空间范围内进行密集，精确的误差测量。在这项工作中，与激光干涉仪相比，激光跟踪仪的精度降低了，用于对整个机床操作空间进行误差测量，从根本上改变了校准问题的格局，并需要新的方法来合成和识别运动学模型。将在每个关节引入并识别与位置相关的六个自由度运动学误差，以及量化的精度水平。构建的运动学模型将为基于表和实时系统的新补偿方法的创建提供基础。新的机床校准和补偿工具将组合成一个整体的体积误差分析框架，将为用户提供能够量化校准和补偿机床时所涉及的权衡的预测工具。研究结果将产生所需的科学和工程知识，以便使用完整的、经过验证的几何误差模型，在整个操作空间内以高效的方式校准和补偿机床。校准成本的降低，零件鉴定时间的缩短，机床精度的提高将使各种各样的产品能够以更高的成本效益和更高的质量制造出来，从而使消费者、经济和社会受益。这项研究项目是密苏里科技大学、波音公司、MAG、自动化精密公司和航空航天制造技术中心之间的独特合作。它还将为本科生提供令人兴奋的研究机会，促进工业从业者的学习机会，并扩大工程领域未被充分代表的群体的参与。

The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) project is to create a new, viable paradigm for machine tool calibration and geometric error compensation. Traditional calibration techniques take dense, accurate error measurements using laser interferometers over a very narrow range of the machine tool operating space. In this work laser trackers, which have reduced accuracy compared to laser interferometers, are used to take error measurements over the entire machine tool operating space, fundamentally altering the calibration problem landscape and requiring new methods for synthesizing and identifying kinematic models. Position-dependent six degree-of-freedom kinematic errors will be introduced and identified at each joint, along with quantified levels of accuracy. The constructed kinematic models will provide a foundation for the creation of new compensation methodologies for table-based and real-time systems. The new machine tool calibration and compensation tools will be combined into a holistic volumetric error analysis framework that will provide users with predictive tools capable of quantifying the tradeoffs involved when calibrating and compensating a machine tool.The research results will generate the scientific and engineering knowledge needed to calibrate and compensate machine tools in a time-efficient manner over their entire operating space using complete, validated geometric error models. The decreased calibration costs, reduced part qualification time, and increased machine tool accuracy will allow a wide variety of products to be fabricated more cost-effectively and with superior quality, benefiting consumers, the economy, and society. This research project is a unique collaboration between Missouri University of Science and Technology, Boeing, MAG, Automated Precision Inc., and the Center for Aerospace Manufacturing Technologies. It will also provide exciting research opportunities for undergraduate students, promote learning opportunities for industrial practitioners, and broaden participation of underrepresented groups in engineering.