Power Output and Dissipation of a Negative Capacitance Shunt Coupled to Piezoelectric Transducers

2011 ◽  
Author(s):  
Benjamin Beck ◽  
Kenneth A. Cunefare ◽  
Manuel Collet
Keyword(s):  
Power Output ◽  
Electromechanical Coupling ◽  
Piezoelectric Element ◽  
Input Power ◽  
Negative Capacitance ◽  
Power Characteristics ◽  
Op Amp ◽  
Control Gain ◽  
Passive Circuit ◽  
Insight Into

A negative capacitance shunt is a basic, analog, active circuit electrically connected to a piezoelectric transducer to control vibrations of flexural bodies. The electrical impedance of the negative capacitance shunt modifies the effective modulus of the piezoelectric element to reduce the stiffness and increase the damping which causes a decrease in amplitude of the vibrating structure to which the elements are bonded. The negative capacitance circuit is built around a single operational amplifier using passive circuit elements. To gain insight into the electromechanical coupling, the power consumption of the op-amp and the power dissipated in the resistive element are measured. The power output of the op-amp increases for increasing control gain of the negative capacitance. The power characteristics of the shunt are compared to the reactive input power analysis developed in earlier work.

Insight into the influence of thermodynamic coefficients on transient negative capacitance in the HZO ferroelectric capacitors

2021 ◽  
Author(s):  
Yuan-Yuan Zhang ◽  
Xiao-Qing Sun ◽  
Jun-Shuai Chai ◽  
Hao Xu ◽  
Xue-Li Ma ◽  
...  
Keyword(s):  
Negative Capacitance ◽  
Ferroelectric Capacitors ◽  
Insight Into

scholarly journals Analisis Pengaruh Perubahan Beban Generator Terhadap Efsiensi Kinerja PLTU Bosowa Energi Jeneponto Unit 2

2021 ◽  
Vol 18 (2) ◽  
pp. 241
Author(s):  
Andreas Pangkung ◽  
Herman Nawir ◽  
Aditya Nugraha Adji Santoso
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
Fuel Consumption ◽  
Power Output ◽  
Power Plants ◽  
Calorific Value ◽  
Input Power ◽  
Steam Power ◽  
Steam Power Plants ◽  
Efficiency Performance

This study aims to determine the effect of changes in generator load on efficiency performance in steam power plants and to determine the amount of input power in the boiler. Data collection was carried out at PT. Bosowa Energi PLTU Jeneponto. The data are the power output, fuel consumption, and the calorific value of the fuel. Then perform data analysis by calculating input power and efficiency. From the result of the study, the highest efficiency is on May 20, 2018 at 18.00 with a load of 90.00 MW, namely 55.68% and the lowest efficiency is on May 12, 2018 at 03.00 with a load of 64.98 MW, namely 22.69%. The highest boiler input power based on the analysis results was on May 3, 2018 at 20.00, namely 356.61 MW, and the lowest boiler input power based on the analysis was on May 15, 2018 at 07.00, namely 128.14 MW.

Structural Health Monitoring With Piezoelectric Active Sensors

2000 ◽  
Author(s):  
Howard A. Winston ◽  
Fanping Sun ◽  
Balkrishna S. Annigeri
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Structural Damage ◽  
Electromechanical Coupling ◽  
Low Cost ◽  
Piezoelectric Element ◽  
Impedance Spectrum ◽  
Active Sensors ◽  
Electromechanical Impedance ◽  
Structural Health

A technology for non-intrusive real-time structural health monitoring using piezoelectric active sensors is presented. The approach is based on monitoring variations of the coupled electromechanical impedance of piezoelectric patches bonded to metallic structures in high-frequency bands. In each of these applications, a single piezoelectric element is used as both an actuator and a sensor. The resulting electromechanical coupling makes the frequency-dependent electric impedance spectrum of the PZT sensor a good mapping of the underlying structure’s acoustic signature. Moreover, incipient structural damage can be indicated by deviations of this signature from its original baseline pattern. Unique features of this technology include its high sensitivity to structural damage, non-intrusiveness to the host structure, and low cost of implementation. These features have potential for enabling on-board damage monitoring of critical or inaccessible aerospace structures and components, such as aircraft wing joints, and both internal and external jet engine components. Several exploratory applications will be discussed.

Broadband Vibration Suppression Assessment of Negative Impedance Shunts

2008 ◽  
Author(s):  
Benjamin Beck ◽  
Kenneth A. Cunefare ◽  
Massimo Ruzzene
Keyword(s):  
Active Control ◽  
Vibration Suppression ◽  
Piezoelectric Materials ◽  
Input Power ◽  
Experimental Results ◽  
Spatial Average ◽  
Negative Capacitance ◽  
Damping Properties ◽  
Control Solution ◽  
Stiffness And Damping

Piezoelectric materials allow for the manipulation of stiffness and damping properties of host structures by the application of electrical shunting networks. The use of piezoelectric patches for broadband control of vibration using a negative impedance shunt has been shown to be an effective active control solution. The wave-tuning and minimization of reactive input power shunt selection methodologies require the use a negative capacitance. This paper shows that the two theories are comparative and obtain the same shunt parameters. The results of the theoretical shunt selection and simulation are compared to experimental results of tip vibration suppression, spatial average vibration, and reactive input power minimization.

Theoretical and experimental studies of a piezoelectric ring energy harvester

2019 ◽  
Vol 30 (7) ◽  
pp. 998-1009 ◽  
Author(s):  
XF Zhang ◽  
HS Tzou
Keyword(s):  
Energy Harvesting ◽  
Power Output ◽  
Output Voltage ◽  
Laboratory Experiments ◽  
Electromechanical Coupling ◽  
Energy Harvester ◽  
Experimental Studies ◽  
Design Parameters ◽  
Resistive Load ◽  
Practical Applications

Based on the electromechanical coupling of piezoelectricity, a piezoelectric ring energy harvester is designed and tested in this study, such that the harvester can be used to power electric devices in the closed-circuit condition. Output energies across the external resistive load are evaluated when the ring energy harvester is subjected to harmonic excitations, and various design parameters are discussed to maximize the power output. In order to validate the theoretical energy harvesting results, laboratory experiments are conducted. Comparing experiment results with theoretical ones, the errors between them are under 10% for the output voltage. Laboratory experiments demonstrate that the ring energy harvester is workable in practical applications.

Energy Harvesting From Impulsive Loads Using Intentional Essential Nonlinearities

2010 ◽  
Vol 133 (1) ◽  
Author(s):  
D. Dane Quinn ◽  
Angela L. Triplett ◽  
Alexander F. Vakakis ◽  
Lawrence A. Bergman
Keyword(s):  
Energy Harvesting ◽  
Electromechanical Coupling ◽  
Piezoelectric Element ◽  
Nonlinear Behavior ◽  
Harmonic Excitation ◽  
Frequency Interval ◽  
Resistive Load ◽  
Nonlinear Harvesting ◽  
Energy Harvesting System ◽  
Energy Harvesting Devices

Energy harvesting devices designed with intentional nonlinearities offer the possibility of increased performance under broadband excitations and realistic environmental conditions. This work considers an energy harvesting system based on the response of an attachment with strong nonlinear behavior. The electromechanical coupling is achieved with a piezoelectric element across a resistive load. When the system is subject to harmonic excitation, the harvested power from the nonlinear system exhibits a wider interval of frequencies over which the harvested power is significant, although an equivalent linear device offers greater efficiency at its design frequency. However, for impulsive excitation, the performance of the nonlinear harvesting system exceeds the corresponding linear system in terms of both magnitude of power harvested and the frequency interval over which significant power can be drawn from the mechanical vibrations.

The Most Cited Mesh Terms and Authors who Published Papers in Pubmed Central on the Topic of Medicine and Health Using Bibliometric Analyses

2019 ◽  
pp. 1-9
Author(s):  
Tsair-Wei Chien ◽  
Hing-Man Wu ◽  
Hsien-Yi Wang ◽  
Willy Chou
Keyword(s):  
Mesh Term ◽  
Deep Insight ◽  
Medical Subject Headings ◽  
Microsoft Excel ◽  
Pubmed Central ◽  
Current State ◽  
Mesh Terms ◽  
Control Gain ◽  
State Of Research ◽  
Insight Into

Aims: We visualized the current state of research on publication outputs and citations in the field of medicine and health to uncover topic burst and citations among medical subject headings (MeSH) clusters. Study Design: A bibliometric analysis. Place and duration of Study: Using Pubmed indexed articles to inspect the characteristics of topics on medicine and health since 1969. Methodology: Selecting 156 abstracts, author names, countries, and MeSH terms on January 10, 2019, from Pubmed Central (PMC) based on the terms of medicine and health in the title since 1969, we applied the x-index and impact factor to evaluate author individual research achievements and compute MeSH bibliometric performances. The bootstrapping method was used to estimate the median and its 95% confidence intervals and make differences in metrics among MeSH clusters. The dominant nations were selected using the x-index to display on a dashboard. We programmed Microsoft Excel VBA routines to extract data. Google Maps and Pajek software were used for displaying graphical representations. Results: We found that (1)the dominant countries/areas are the Unlited States, Taiwan, and Australia; (2) the author Grajales, Francisco Jose 3rd form Canada has the most cited metrics such as author IF=39.46 and x-index=6.28; (3)the MeSH terms of organization & administration, standards, and prevention & control gain the top three degree centralities among MeSH clusters; (4) No any differences in metrics were found among MeSH clusters; (5) the article(PMID= 24518354) with three MeSH term of delivery of health care, social media, and software and published in 2014 was cited most at least 62 times. Conclusion: Social network analysis provides wide and deep insight into the relationships among MeSH terms. The MeSH weighted scheme and x-index were recommended to academics for computing MeSH citations in the future.

G1010403 Characteristics of Electricity Generation Using Piezoelectric Element with Electromechanical Coupling

2014 ◽  
Vol 2014 (0) ◽  
pp. _G1010403--_G1010403-
Author(s):  
Kazuya SUZUKI ◽  
Koichi NISIKAWA ◽  
Hirotarou TSUCHIYA ◽  
Hiroyuki MORIYAMA
Keyword(s):  
Electricity Generation ◽  
Electromechanical Coupling ◽  
Piezoelectric Element

Application of a Negative Capacitance Circuit in Synchronized Switch Damping Techniques for Vibration Suppression

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Hongli Ji ◽  
Jinhao Qiu ◽  
Jun Cheng ◽  
Daniel Inman
Keyword(s):  
Composite Beam ◽  
Vibration Suppression ◽  
Piezoelectric Element ◽  
Single Mode ◽  
Resonant Circuit ◽  
Negative Capacitance ◽  
Control Performance ◽  
Damping Effect ◽  
Mode Control ◽  
Shunt Circuit

In the synchronized switching damping (SSD) techniques, the voltage on the piezoelectric element is switched synchronously with the vibration to be controlled using an inductive shunt circuit (SSDI). The inherent capacitance and the inductance in the shunt circuit comprise an electrically resonant circuit. In this study, a negative capacitance is used in the shunt circuit instead of an inductance in the traditional SSD technique. The voltage on the piezoelectric element can be effectively inverted although the equivalent circuit is capacitive and no resonance occurs. In order to investigate the principle of the new SSD method based on a negative capacitance (SSDNC), the variation of the voltage on the piezoelectric element and the current in the circuit are analyzed. Furthermore, the damping effect using the SSDNC is deduced, and the energy balance and stability of the new system are investigated analytically. The method is applied to the single-mode control and two-mode control of a composite beam, and its control performance was confirmed by the experimental results. For the first mode in single-mode control, the SSDNC is much more effective than SSDI. In other cases, the SSDNC is also more effective than the SSDI, although not significantly.

Sign in / Sign up

Export Citation Format

Share Document