no code implementations • 14 Jan 2025 • C. A. Lindley, N. Dervilis, K. Worden
Whenever data-based systems are employed in engineering applications, defining an optimal statistical representation is subject to the problem of model selection.
no code implementations • 29 Feb 2024 • S. M. Smith, A. J. Hughes, T. A. Dardeno, L. A. Bull, N. Dervilis, K. Worden
Population-based structural health monitoring (PBSHM), aims to share information between members of a population.
no code implementations • 16 Oct 2023 • W. Lin, K. Worden, E. J. Cross
Population-based structural health monitoring can further reduce the cost of health monitoring systems by implementing one system for multiple structures (i. e.~turbines).
no code implementations • 19 Jul 2023 • G. Tsialiamanis, N. Dervilis, D. J. Wagg, K. Worden
The current work is aimed at motivating the use of models which learn such relationships from a population of phenomena, whose underlying physics are similar.
no code implementations • 12 Jul 2023 • T. A. Dardeno, K. Worden, N. Dervilis, R. S. Mills, L. A. Bull
In this paper, a combined probabilistic FRF model is developed for a small population of nominally-identical helicopter blades, using a hierarchical Bayesian structure, to support information transfer in the context of sparse data.
no code implementations • 8 Mar 2023 • S. C. Bee, E. Papatheou, M Haywood-Alexander, R. S. Mills, L. A. Bull, K. Worden, N. Dervilis
There have been recent efforts to move to population-based structural health monitoring (PBSHM) systems.
no code implementations • 15 Feb 2023 • G. Tsialiamanis, N. Dervilis, D. J. Wagg, K. Worden
The approach followed here is meta-learning, which is developed with a view to creating neural network models which are able to exploit knowledge from a population of various tasks to perform well in newly-presented tasks, with minimal training and a small number of data samples from the new task.
no code implementations • 18 Aug 2022 • G. Tsialiamanis, D. Wagg, N. Dervilis, K. Worden
The model is able to perform in a population-based SHM (PBSHM) framework, to take into account many past states of the damaged structure, to incorporate uncertainties in the modelling process and to generate potential damage evolution outcomes according to data acquired from a structure.
1 code implementation • 8 Mar 2022 • G. Tsialiamanis, D. J. Wagg, N. Dervilis, K. Worden
Two different types of generative models are considered here.
no code implementations • 3 Mar 2022 • G. Tsialiamanis, D. J. Wagg, N. Dervilis, K. Worden
The cGAN is trained on data for some discrete values of the temperature within some range, and is able to generate data for every temperature in this range with satisfactory accuracy.
no code implementations • 3 Mar 2022 • G. Tsialiamanis, D. J. Wagg, P. A. Gardner, N. Dervilis, K. Worden
A second approach to the problem is considered by adopting ideas from transfer learning (usually applied in much deeper) networks to see if a network trained on the simpler damage cases can help with feature extraction in the more difficult cases.
no code implementations • 3 Mar 2022 • G. Tsialiamanis, C. Mylonas, E. Chatzi, D. J. Wagg, N. Dervilis, K. Worden
The proposed approach is tested in a simulated population of trusses.
no code implementations • 2 Mar 2022 • G. Tsialiamanis, M. D. Champneys, N. Dervilis, D. J. Wagg, K. Worden
The method is tested on simulated data from structures with cubic nonlinearities and different numbers of degrees of freedom, and also on data from an experimental three-degree-of-freedom set-up with a column-bumper nonlinearity.
no code implementations • 30 Nov 2021 • L. A. Bull, P. A. Gardner, T. J. Rogers, N. Dervilis, E. J. Cross, E. Papatheou, A. E. Maguire, C. Campos, K. Worden
Power curves capture the relationship between wind speed and output power for a specific wind turbine.
no code implementations • 12 May 2021 • A. J. Hughes, L. A. Bull, P. Gardner, R. J. Barthorpe, N. Dervilis, K. Worden
A primary motivation for the development and implementation of structural health monitoring systems, is the prospect of gaining the ability to make informed decisions regarding the operation and maintenance of structures and infrastructure.