Model order reduction for real-time data assimilation through Extended Kalman Filters

• Published in: Computer methods in applied mechanics and engineering Vol. 326; pp. 679 - 693
• Main Authors: González, David, Badías, Alberto, Alfaro, Icíar, Chinesta, Francisco, Cueto, Elías
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2017; Elsevier BV
• Subjects: Augmented reality; Data assimilation; Experiments; Extended Kalman filter; Feedback; Kalman filters; Model reduction; Proper generalized decomposition; Real time; Solid mechanics; Proper generalized decomposition; Model reduction; Extended Kalman filter; Data assimilation
• ISSN: 0045-7825; 1879-2138
• DOI: 10.1016/j.cma.2017.08.041

Data assimilation is the process by which experimental measurements are incorporated into the modeling process of a given system. We focus here on the framework of non-linear solid mechanics. Applications of the developed methodology include real-time monitoring and control of structures or mixed/augmented reality, to name a few. In these circumstances, the real-time performance of the method is crucial to provide the user with robust predictions about the behavior of the experimental system. To achieve real-time feedback rates, the model (also known as physical prior) and its solution play a fundamental role. Given the inherent non-linear character of the problems here considered, we employ reduced order techniques in order to obtain such stringent feedback rates. Examples are provided on realistic models that show the performance of the proposed technique.