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Fabrication, Properties and Application of Piezoelectric Composites
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Fabrication, Properties and Application of Piezoelectric Composites

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: closed (30 September 2020) | Viewed by 6293

Special Issue Editors

Dr. Andreas Schönecker

E-Mail Website
Guest Editor
Fraunhofer-Institut für Keramische Technologien und Systeme (IKTS), Dresden, Germany
Dr. Rob Bryant

E-Mail Website
Guest Editor
NASA Langley Research Center, Hampton, VA, USA
Dr. Thomas Daue

E-Mail Website
Guest Editor
Smart Material Corp.

Special Issue Information

Dear Colleagues,

Piezoelectric composites are application-relevant functional multiphase materials, with piezoelectric material phase providing electromechanical coupling. Further constituent phases are used to improve complimentary application-specific requirements and are indispensable for functionally superior devices. The research on piezoelectric composites has been stimulated by the introduction of the concept of connectivity developed by Newnham et al. in the late 1970s. Ultrasound transducers and flexible, low-profile sensors and actuators for smart structure applications are placed on the market, today.

Using a wider range of materials (piezoelectric ceramics, piezoelectric polymers, plastic and functional inorganic additives), the scale of structural patterns (from micro- to nanoscale), the application of new technologies together with the development of sophisticated characterization methods are expected to stimulate future innovations.

This Special Issue aims to provide an overview of the current research on piezoelectric composites, especially with perspective for commercial applications covering all aspects from material development, microstructural optimization, and functional tests.

 Full papers, communications, and reviews are all welcome.

Dr. Andreas Schönecker
Dr. Rob Bryant
Dr. Thomas Daue
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Piezoelectrics composites
  • Microstructure
  • Ultrasound transducer
  • Sensor
  • Actuator
  • Smart structures
  • Piezoelectric materials

Published Papers (2 papers)

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Research

16 pages, 5774 KiB  
Article
Sliding Mode Control with Dynamical Correction for Time-Delay Piezoelectric Actuator Systems
by Javier Velasco, Oscar Barambones, Isidro Calvo, Joseba Zubia, Idurre Saez de Ocariz and Ander Chouza
Materials 2020, 13(1), 132; https://doi.org/10.3390/ma13010132 - 27 Dec 2019
Cited by 9 | Viewed by 2641
Abstract
In piezoelectric actuators (PEAs), which suffer from inherent nonlinearities, sliding mode control (SMC) has proven to be a successful control strategy. Nonetheless, in micropositioning systems with time delay, integral proportional control (PI), and SMC, feedback control schemes have a tendency to overcompensate and, [...] Read more.
In piezoelectric actuators (PEAs), which suffer from inherent nonlinearities, sliding mode control (SMC) has proven to be a successful control strategy. Nonetheless, in micropositioning systems with time delay, integral proportional control (PI), and SMC, feedback control schemes have a tendency to overcompensate and, consequently, high controller gains must be rejected. This may produce a slow and inaccurate response. This paper presents a novel control strategy that deals with time-delay micropositioning systems aimed at achieving precise positioning by combining an open-loop control with a modified SMC scheme. The proposed SMC with dynamical correction (SMC-WDC) uses the dynamical system model to adapt the SMC inputs and avoid undesirable control response caused by delays. In order to develop the SMC-WDC scheme, an exhaustive analysis on the micropositioning system was first performed. Then, a mixed control strategy, combining inverse open-loop control and SMC-WDC, was developed. The performance of the presented control scheme was analyzed and compared experimentally with other control strategies (i.e., PI and SMC with saturation and hyperbolic functions) using different reference signals. It was found that the SMC-WDC strategy presents the best performance, that is, the fastest response and highest accuracy, especially against sudden changes of reference setpoints (frequencies >10 Hz). Additionally, if the setpoint reference frequencies are higher than 10 Hz, high integral gains are counterproductive (since the control response increases the delay), although if frequencies are below 1 Hz the integral control delay does not affect the system’s accuracy. The SMC-WDC proved to be an effective strategy for micropositioning systems, dealing with time delay and other uncertainties to achieve the setpoint command fast and precisely without chattering. Full article
(This article belongs to the Special Issue Fabrication, Properties and Application of Piezoelectric Composites)
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13 pages, 4255 KiB  
Article
Vibration Viscosity Sensor for Engine Oil Monitoring Using Metal Matrix Piezoelectric Composite
by Tetsuro Yanaseko, Hiroshi Sato, Isao Kuboki, Karla Mossi and Hiroshi Asanuma
Materials 2019, 12(20), 3415; https://doi.org/10.3390/ma12203415 - 18 Oct 2019
Cited by 20 | Viewed by 3326
Abstract
Lubricants such as engine oil play an important role in preventing machine wear and damage. Monitoring the deterioration of lubricating oils is a significant technical issue in machine maintenance. In this study, a sensor for monitoring engine oil viscosity was developed using a [...] Read more.
Lubricants such as engine oil play an important role in preventing machine wear and damage. Monitoring the deterioration of lubricating oils is a significant technical issue in machine maintenance. In this study, a sensor for monitoring engine oil viscosity was developed using a metal-core piezoelectric fiber/aluminum composite. This composite is a piezoelectric ceramic that is reinforced by a metal matrix; it is expected to be utilized in harsh environments such as the inside of an engine. An active type measurement method was employed to monitor variations in the viscosity of glycerin solution as a model liquid. In this method, a self-generated vibration is correlated to the viscosity of a liquid by measuring the damped vibration amplitude and the variation in the resonance frequency. The results showed that the vibration had a high sensitivity to the liquid viscosity; further, it was observed that the shift in resonance frequency correlated to a wider range of measurable viscosity. Both measured parameters indicate that the metal-core piezoelectric fiber/aluminum composite is a viable sensor for engine oil monitoring. Full article
(This article belongs to the Special Issue Fabrication, Properties and Application of Piezoelectric Composites)
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