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New improved version of J1…J4 interferometry method and its application to nanometric vibration measurements
(IEEERio de Janeiro, 2013)
Piezoelectric ceramics, such as PZT, can generate subnanometric displacements, but in order to generate multi-micrometric displacements, they should be either driven by high electric voltages (hundreds of volts), or operate ...
Observer-based state-feedback versus H-infinity output feedback control solved by LMI approach for applications in smart structures
(Katholieke Univ Leuven, Dept Werktuigkunde, 2005-01-01)
This paper aims with the use of linear matrix inequalities approach (LMIs) for application in active vibration control problems in smart strutures. A robust controller for active damping in a panel was designed with ...
Experimental damage detection in smart structures using lamb waves approach
(2008-01-01)
This paper presents an experimental technique for structural health monitoring (SHM) based on Lamb waves approach in an aluminum plate using piezoelectric material as actuators and sensors. Lamb waves are a form of elastic ...
Observer-based state-feedback versus H∞ output feedback control solved by LMI approach for applications in smart structures
(2004-12-01)
This paper aims with the use of linear matrix inequalities approach (LMIs) for application in active vibration control problems in smart strutures. A robust controller for active damping in a panel was designed with ...
Smart structures health monitoring using artificial neural network
(Technomic Publ Co Inc, 1999-01-01)
This paper presents a non-model based technique to detect and locate structural damage with the use of artificial neural networks. This method utilizes high frequency structural excitation (typically greater than 30 kHz) ...
Composites PVDF-TrFE/BT used as bioactive membranes for enhancing bone regeneration
(Spie - Int Soc Optical Engineering, 2004-01-01)
In this paper a piezoelectric composite membranes were developed for charge generator to promoter bone regeneration on defects sites. Is known that the osteogenesis process is induced by interactions between biological ...
Digital control system for two-beam optical interferometry using variable structure and sliding modes method
(2019-01-01)
Laser interferometry is recognized as an extremely sensitive measurement technique, capable of detecting quantities that conventional sensors usually cannot. However, such advantage also brings a challenge, the interferometer ...
Impedance-based structural health monitoring under low signal-to-noise ratio conditions
(2018-01-01)
One of the most promising nondestructive evaluation (NDE) in structural health monitoring (SHM) systems for the inspection of aerospace and civil components is the impedance-based method. This damage detection technique ...
Data-driven autoregressive model identification for structural health monitoring in anisotropic composite plates
(2019-01-01)
A simple data-driven AutoRegressive (AR) model may be used to assess a model to describe and to predict the time-series outputs of the PZT sensors receiving Lamb waves for different operating conditions in composite ...
Variable structure and sliding modes nonlinear control system applied to a fiber optic interferometer
(Spie-int Soc Optical Engineering, 2017-01-01)
In this work, we present the application of a nonlinear control system, based on variable structure control and sliding modes, to a fiber optic Mach-Zehnder interferometer. We showed that this control system is able to ...