Douglas E. Adams

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This paper presents a new technique for identifying cracks in wind turbine blades undergoing operational loads using the Vibro-Acoustic Modulation technique. Vibro-Acoustic Modulation utilizes a low frequency pumping excitation signal in conjunction with a high frequency probing excitation signal to create the modulation that is used to identify cracks.(More)
— Modeling and simulation environments are needed to support decision making in Navy Warfighters, which are emergent systems that pose a challenge to operations management. Ships consist of complex interconnected systems such as the infrastructure, crew, and workflow. A system-of-systems approach using agent-based modeling is applied here to develop(More)
Mitigating human errors is a priority in the design of complex systems, especially through the use of body area networks. This paper describes early developments of a dynamic data driven platform to predict operator error and trigger appropriate intervention before the error happens. Using a two-stage process, data was collected using several sensors (e.g.,(More)
This paper presents a crack detection technique for wind turbine blades using Vibro­Acoustic Modulation. This technique identifies the nonlinear characteristics of a blade by utilizing the wind turbine operational vibration as a pumping signal. The underlying theory of the technique is described and then an experiment with a 900 watt small­scale wind(More)
This paper presents a robust crack detection algorithm for wind turbine blades using vibro­acoustic modulation and the area under the curve of the frequency spectrum of the sidebands. In a previous paper it was shown how the operational vibration of the turbine could be used as a pumping signal in vibro­acoustic modulation. However, the sources of the(More)
  • Madhur Aravind Khadabadi, Madhur A Khadabadi, Karen B Marais, William A Crossley, Douglas E Adams, Weinong Chen
  • 2015
This is to certify that the thesis/dissertation prepared By Entitled For the degree of Is approved by the final examining committee: Chair To the best of my knowledge and as understood by the student in the Research Integrity and Copyright Disclaimer (Graduate School Form 20), this thesis/dissertation adheres to the provisions of Purdue University's "(More)
This is to certify that the thesis/dissertation prepared By Entitled For the degree of Is approved by the final examining committee: Chair To the best of my knowledge and as understood by the student in the Research Integrity and Copyright Disclaimer (Graduate School Form 20), this thesis/dissertation adheres to the provisions of Purdue University's "(More)
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