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Collaborative Research: Calibrating Digital Twins in the Era of Big Data with Stochastic Optimization

合作研究：利用随机优化校准大数据时代的数字孪生

基本信息

批准号：
2226347
负责人：
Sara Shashaani
金额：
$ 28.23万
依托单位：
North Carolina State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2023
资助国家：
美国
起止时间：
2023-01-01 至 2025-12-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2226347&HistoricalAwards=false
关键词：
Collaborative Research Calibrating Digital Twins

项目摘要

This project will contribute to the national prosperity by providing new calibration methods to generate value-producing opportunities for digital twins in many applications, including energy, healthcare, and manufacturing. A digital twin is a digital representation of a complex physical system that can be useful for monitoring, forecasting, and testing the system in a virtual world. Parameter calibration of digital twins with observational data is one of the most important steps in enabling them to closely replicate a physical system. Today, advanced data sensing and collection technologies provide massive data points from many components of a complex system. The success of this project will provide a means of robust estimation by efficient sampling from these large datasets, thereby significantly reducing the computational burden of calibration. The outreach activities of the project will improve workforce preparation through engagement with industrial practitioners, broaden participation through involvement of underrepresented students in research, and provide opportunities for K-12 students to learn about the field of data science.Quantitative methods established during this project for digital twin calibration will fully leverage the power of Big Data while addressing the research challenges brought forth by the size and complexity of the datasets. Specific research tasks include: development of stochastic optimization approaches reconciled with statistical theories that will optimally guide simulation experiments by identifying the best (smallest most informative) subsets of data for computational efficiency; extending the integrative optimization framework to be applicable for a wide range of calibration problems, including multi-dimensional, functional, and time-variant calibrations, with theoretical and practical implications; and seamless incorporation of input uncertainty with optimization to dramatically enhance the solution's robustness while maintaining computational tractability. The approach will be validated through real-word case studies in building energy systems and wind power systems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将通过提供新的校准方法，为数字双胞胎在包括能源、医疗保健和制造业在内的许多应用领域创造价值创造机会，为国家繁荣做出贡献。数字孪生兄弟是复杂物理系统的数字表示，可用于在虚拟世界中监控、预测和测试系统。利用观测数据对数字双胞胎进行参数校准是使他们能够紧密复制物理系统的最重要步骤之一。今天，先进的数据传感和收集技术提供了来自复杂系统许多组件的海量数据点。该项目的成功将提供一种通过从这些大型数据集进行有效采样来进行稳健估计的手段，从而大大减少校准的计算负担。该项目的外展活动将通过与行业从业者的接触来改善劳动力准备，通过未被充分代表的学生参与研究来扩大参与，并为K-12学生提供了解数据科学领域的机会。在该项目期间建立的数字双胞胎校准量化方法将充分利用大数据的力量，同时解决数据集的规模和复杂性带来的研究挑战。具体的研究任务包括：开发与统计理论相协调的随机优化方法，通过确定计算效率的最佳(最小的、信息最丰富的)数据子集，以最佳方式指导模拟实验；扩展综合优化框架，使其适用于具有理论和实践影响的广泛的校准问题，包括多维、函数和时变校准；以及将输入不确定性与优化无缝结合，以显著增强解决方案的稳健性，同时保持计算易操作性。该方法将通过建筑能源系统和风力发电系统的实际案例研究进行验证。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。