Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.82063210088
A. Y. Pandiyan, M. Kiziroglou, D. Boyle, S. Wright, E. Yeatman
Motivated by recent developments in Wireless Power Transfer (WPT), this work presents a solution for the optimization of a two-stage energy distribution system combining inductive and acoustic power transfer using a clustering algorithm. A network of immobile wireless sensors equipped with acoustic transceivers, storage capacitors and with known cartesian coordinates in a 2D plane is considered. A power delivery vehicle (PDV) with finite energy storage capacity is used to recharge a sensor node’s supercapacitor which then transmits power to neighboring sensors acoustically within range. This work aims to find an optimal charging route for the PDV. The proposed algorithm is a combination of cluster analysis and breadth-first search. A theoretical study was performed, and the simulation results obtained were studied for the long-term failure probability for the proposed energy scheme.
{"title":"Optimal Energy Management of Two Stage Energy Distribution Systems Using Clustering Algorithm","authors":"A. Y. Pandiyan, M. Kiziroglou, D. Boyle, S. Wright, E. Yeatman","doi":"10.1109/PowerMEMS49317.2019.82063210088","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.82063210088","url":null,"abstract":"Motivated by recent developments in Wireless Power Transfer (WPT), this work presents a solution for the optimization of a two-stage energy distribution system combining inductive and acoustic power transfer using a clustering algorithm. A network of immobile wireless sensors equipped with acoustic transceivers, storage capacitors and with known cartesian coordinates in a 2D plane is considered. A power delivery vehicle (PDV) with finite energy storage capacity is used to recharge a sensor node’s supercapacitor which then transmits power to neighboring sensors acoustically within range. This work aims to find an optimal charging route for the PDV. The proposed algorithm is a combination of cluster analysis and breadth-first search. A theoretical study was performed, and the simulation results obtained were studied for the long-term failure probability for the proposed energy scheme.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"80 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74812877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.20515807866
E. O. Popov, S. Filippov, A. G. Kolosko
The paper presents a description of a comprehensive technique developed for a multilateral study of the properties of large area field emitters (LAFEs). The main advantages of the technique are the use of various high voltage power supply modes and online analysis of the recorded signals. The technique includes not only the registration of standard emission parameters, but also the analysis of related phenomena -luminescence patterns and mass spectrometric data. In addition, the methodology includes checking the correspondence of the cathode operation mode to classical cold field emission, based on the latest theoretical developments, and computer simulation using COMSOL and LabVIEW packages.
{"title":"Complex methodology for studying the emission properties of multi-tip field cathodes with online data processing","authors":"E. O. Popov, S. Filippov, A. G. Kolosko","doi":"10.1109/PowerMEMS49317.2019.20515807866","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.20515807866","url":null,"abstract":"The paper presents a description of a comprehensive technique developed for a multilateral study of the properties of large area field emitters (LAFEs). The main advantages of the technique are the use of various high voltage power supply modes and online analysis of the recorded signals. The technique includes not only the registration of standard emission parameters, but also the analysis of related phenomena -luminescence patterns and mass spectrometric data. In addition, the methodology includes checking the correspondence of the cathode operation mode to classical cold field emission, based on the latest theoretical developments, and computer simulation using COMSOL and LabVIEW packages.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"25 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83200270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.51289503684
Yang Kuang, M. Zhu
This work presents an experimentally validated impedance-based finite element model (FEM) of a highly-coupled pre-stressed piezoelectric energy harvester (PEH) with piezoelectric multilayer stacks (PMSs). The FEM first simulates the status of the PEH as a result of the static pre-stress. It then analyses the internal impedance$|Z_{in}|$ of the pre-stressed PEH, which is used as the optimal load resistance Ropt for power output generation. The developed FEM is able to precisely predict (1) the maximum power output at each frequency without the tedious load-resistance sweeping approach traditionally used; (2) the dual-power-peaks phenomenon of highly-coupled PEHs, which cannot be observed when using the traditional approach of $R_{opt}=1/omega C_{P}$. This model provides a useful tool for the design and optimization highly-coupled piezoelectric energy harvesters.
{"title":"Impedance-based finite element modelling of a highly-coupled and pre-stressed piezoelectric energy harvester","authors":"Yang Kuang, M. Zhu","doi":"10.1109/PowerMEMS49317.2019.51289503684","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.51289503684","url":null,"abstract":"This work presents an experimentally validated impedance-based finite element model (FEM) of a highly-coupled pre-stressed piezoelectric energy harvester (PEH) with piezoelectric multilayer stacks (PMSs). The FEM first simulates the status of the PEH as a result of the static pre-stress. It then analyses the internal impedance$|Z_{in}|$ of the pre-stressed PEH, which is used as the optimal load resistance Ropt for power output generation. The developed FEM is able to precisely predict (1) the maximum power output at each frequency without the tedious load-resistance sweeping approach traditionally used; (2) the dual-power-peaks phenomenon of highly-coupled PEHs, which cannot be observed when using the traditional approach of $R_{opt}=1/omega C_{P}$. This model provides a useful tool for the design and optimization highly-coupled piezoelectric energy harvesters.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"32 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88279323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.71805303927
L. Wang, Dibin Zhu
This paper reports a novel method to improve output power of a flapping airflow energy harvester by introducing flexible wing sections. The flapping airflow energy harvester consists of a cantilever beam structure with a wing at its free end. A bluff body is placed in front of the wing to induce aerodynamic instability that leads to up and down oscillation of the wing. By coupling transducers to the oscillating wing, electromagnetic in this case, electrical energy can be generated. In this research, instead of using a commonly used rigid wing, the proposed airflow energy harvester has flexible wing sections that are able to bend, thus reduce the aerodynamic resistance during the wing oscillation. Therefore, the overall mechanical damping can be reduced and output power of the proposed energy harvester is increased. It is found experimentally that the proposed method is able to improve energy harvester performance of flapping airflow energy harvesters under high airflow speeds.
{"title":"A Flapping Airflow Energy Harvester with Flexible Wing Sections","authors":"L. Wang, Dibin Zhu","doi":"10.1109/PowerMEMS49317.2019.71805303927","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.71805303927","url":null,"abstract":"This paper reports a novel method to improve output power of a flapping airflow energy harvester by introducing flexible wing sections. The flapping airflow energy harvester consists of a cantilever beam structure with a wing at its free end. A bluff body is placed in front of the wing to induce aerodynamic instability that leads to up and down oscillation of the wing. By coupling transducers to the oscillating wing, electromagnetic in this case, electrical energy can be generated. In this research, instead of using a commonly used rigid wing, the proposed airflow energy harvester has flexible wing sections that are able to bend, thus reduce the aerodynamic resistance during the wing oscillation. Therefore, the overall mechanical damping can be reduced and output power of the proposed energy harvester is increased. It is found experimentally that the proposed method is able to improve energy harvester performance of flapping airflow energy harvesters under high airflow speeds.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"6 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90771246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/powermems49317.2019.30773702286
X. Yue, Jessica Grzyb, Akaash Padmanabha, J. Pikul
We demonstrate a hermetic packaging strategy for micro energy storage systems that minimizes the packaging volume and increases the active energy storage materials by 2X and 5X compared to the best lab scale microbatteries and commercial pouch cells. The minimal packaging design uses the current collectors as a multifunctional hermetic shell and laser-machined hot melt tape to provide a thin, robust hermetic sealing between current collectors with stronger adhesion to metals than most commercial adhesives. We developed the packaging using commercially available equipment and materials, and created a strategy that can be applied to many kinds of micro energy systems with custom shape configurations. This minimal, versatile packaging has the potential to improve the energy density of current micro energy storage systems for applications ranging from biomedical devices to micro-robots.
{"title":"A minimal volume hermetic packaging design for high energy density micro energy systems","authors":"X. Yue, Jessica Grzyb, Akaash Padmanabha, J. Pikul","doi":"10.1109/powermems49317.2019.30773702286","DOIUrl":"https://doi.org/10.1109/powermems49317.2019.30773702286","url":null,"abstract":"We demonstrate a hermetic packaging strategy for micro energy storage systems that minimizes the packaging volume and increases the active energy storage materials by 2X and 5X compared to the best lab scale microbatteries and commercial pouch cells. The minimal packaging design uses the current collectors as a multifunctional hermetic shell and laser-machined hot melt tape to provide a thin, robust hermetic sealing between current collectors with stronger adhesion to metals than most commercial adhesives. We developed the packaging using commercially available equipment and materials, and created a strategy that can be applied to many kinds of micro energy systems with custom shape configurations. This minimal, versatile packaging has the potential to improve the energy density of current micro energy storage systems for applications ranging from biomedical devices to micro-robots.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"10 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88695036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/powermems49317.2019.61547410899
Miklós Szappanos, János Radó, P. Harmat, J. Volk
In this work we present a wireless, energy harvesting powered solution for vibration analysis. In order to ensure minimal power consumption the system is equipped with our own radiofrequency protocol, which is tailored for the needs of energy harvesting.Our system has a small form factor, all the while containing everything needed for a wireless energy harvesting sensor unit. It has two switchable MEMS accelerometers to ensure minimal power consumption and to maintain wide frequency range if needed. The on-board processing unit with floating point hardware accelerator makes Fourier transformation, thus vibration spectrum analysation efficient. The energy management unit is designed with dual topology, making it able to accept both low and high impedance energy harvesters at the same time (hybrid harvesting). The radiofrequency module may work with our own radio frequency protocol or with the Bluetooth standard (Bluetooth 5, BLE with long range PHY).
{"title":"Self-Powered Vibration Analyser","authors":"Miklós Szappanos, János Radó, P. Harmat, J. Volk","doi":"10.1109/powermems49317.2019.61547410899","DOIUrl":"https://doi.org/10.1109/powermems49317.2019.61547410899","url":null,"abstract":"In this work we present a wireless, energy harvesting powered solution for vibration analysis. In order to ensure minimal power consumption the system is equipped with our own radiofrequency protocol, which is tailored for the needs of energy harvesting.Our system has a small form factor, all the while containing everything needed for a wireless energy harvesting sensor unit. It has two switchable MEMS accelerometers to ensure minimal power consumption and to maintain wide frequency range if needed. The on-board processing unit with floating point hardware accelerator makes Fourier transformation, thus vibration spectrum analysation efficient. The energy management unit is designed with dual topology, making it able to accept both low and high impedance energy harvesters at the same time (hybrid harvesting). The radiofrequency module may work with our own radio frequency protocol or with the Bluetooth standard (Bluetooth 5, BLE with long range PHY).","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"74 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88968034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.20515807357
J. Pu, Y. Shi, Y. Jia
A prosthetic applying energy harvesting system will benefit from economizing the space to be evacuated for bulky battery instead of smart and portable in situ rechargeable batteries. In addition, fibre reinforced composites for main-body material also take advantages of its strong and lightweight properties for portable usage. This paper demonstrates manufacturing of a smart composite prosthetic leg with energy harvesting capabilities and to investigate the power recovering performance of the carbon-fibre prosthetic. Tests of energy harvesting was based on a vibration shaker where a prosthetic mount by macro fibre composite (MFC) was attached on. Acceleration data collected in terms of running, walking, climbing and walking with weight in hand are utilized to stimulate MFC generating electric power. The results find that running gait recovered the most average power from 420 mW.
{"title":"Energy Harvesting from Kinetics of Prosthetic Leg","authors":"J. Pu, Y. Shi, Y. Jia","doi":"10.1109/PowerMEMS49317.2019.20515807357","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.20515807357","url":null,"abstract":"A prosthetic applying energy harvesting system will benefit from economizing the space to be evacuated for bulky battery instead of smart and portable in situ rechargeable batteries. In addition, fibre reinforced composites for main-body material also take advantages of its strong and lightweight properties for portable usage. This paper demonstrates manufacturing of a smart composite prosthetic leg with energy harvesting capabilities and to investigate the power recovering performance of the carbon-fibre prosthetic. Tests of energy harvesting was based on a vibration shaker where a prosthetic mount by macro fibre composite (MFC) was attached on. Acceleration data collected in terms of running, walking, climbing and walking with weight in hand are utilized to stimulate MFC generating electric power. The results find that running gait recovered the most average power from 420 mW.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"28 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87812688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.41031604008
Xutao Mei, Shengxi Zhou, Bo Yang, T. Kaizuka, Kimihiko Nakano
Recently, various nonlinear energy harvesters, which is aimed to provide the power supply for wireless sensors, are designed to harvest rotational energy. However, there are few studies for energy harvesting from rotational motion when the rotational speed is less than 120 rpm (2 Hz). In this paper, an inverse nonlinear piezoelectric energy harvester (PEH) is proposed for enhancing performance in low-frequency rotational motion via the centrifugal softening effect. In addition, according to Lagrange equation, the related theoretical model is derived. Furthermore, the experiments between the forward and inverse configurations in rotational motion are conducted under the rotational speeds ranging from 60 rpm to 160 rpm. The experimental results demonstrate that in low-frequency rotational motion the inverse PEH exhibits outstanding performance with the RMS voltage as high as 5 V, which is enough for powering some wireless sensors. Overall, the centrifugal softening effect is verified to be an effect method for energy harvesting in low-frequency rotational motion.
{"title":"The Centrifugal Softening Effect of an Inverse Nonlinear Energy Harvester in Low-frequency Rotational Motion for Enhancing Performance","authors":"Xutao Mei, Shengxi Zhou, Bo Yang, T. Kaizuka, Kimihiko Nakano","doi":"10.1109/PowerMEMS49317.2019.41031604008","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.41031604008","url":null,"abstract":"Recently, various nonlinear energy harvesters, which is aimed to provide the power supply for wireless sensors, are designed to harvest rotational energy. However, there are few studies for energy harvesting from rotational motion when the rotational speed is less than 120 rpm (2 Hz). In this paper, an inverse nonlinear piezoelectric energy harvester (PEH) is proposed for enhancing performance in low-frequency rotational motion via the centrifugal softening effect. In addition, according to Lagrange equation, the related theoretical model is derived. Furthermore, the experiments between the forward and inverse configurations in rotational motion are conducted under the rotational speeds ranging from 60 rpm to 160 rpm. The experimental results demonstrate that in low-frequency rotational motion the inverse PEH exhibits outstanding performance with the RMS voltage as high as 5 V, which is enough for powering some wireless sensors. Overall, the centrifugal softening effect is verified to be an effect method for energy harvesting in low-frequency rotational motion.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"18 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87426930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.51289503157
B. Dong, Qiongfeng Shi, Tianyiyi He, Chengkuo Lee
We study the feasibility of actively and efficiently tuning an aluminum nitride (AlN) photonic modulator using a triboelectric nanogenerator (TENG). By utilizing the Pockels effect in AlN, AlN microring resonator (MRR) modulator can be tuned by the external E-field penetrating through it. The high open-circuit voltage provided by the TENG has synergy with the capacitor nature of AlN MRR modulators. The high voltage can be applied to the AlN modulator with negligible degradation. We demonstrate dynamic modulation of AlN modulator using a textile TENG. The AlN modulator has high fabrication variation tolerance. The hybrid integrated system is not affected by the hand tapping speed on TENG. Dynamic optical switching is realized which is further utilized to demonstrate the optical Morse code transmission. This hybrid integration is a crucial demonstration toward future self-sustainable wearable photonic IC, which will find significant applications in Internet of Things (IoT) and human-machine interface (HMI).
{"title":"Characterization of Aluminum Nitride (AlN) Photonic Modulator as Function of High Voltage from Textile Triboelectric Nanogenerator (TENG)","authors":"B. Dong, Qiongfeng Shi, Tianyiyi He, Chengkuo Lee","doi":"10.1109/PowerMEMS49317.2019.51289503157","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.51289503157","url":null,"abstract":"We study the feasibility of actively and efficiently tuning an aluminum nitride (AlN) photonic modulator using a triboelectric nanogenerator (TENG). By utilizing the Pockels effect in AlN, AlN microring resonator (MRR) modulator can be tuned by the external E-field penetrating through it. The high open-circuit voltage provided by the TENG has synergy with the capacitor nature of AlN MRR modulators. The high voltage can be applied to the AlN modulator with negligible degradation. We demonstrate dynamic modulation of AlN modulator using a textile TENG. The AlN modulator has high fabrication variation tolerance. The hybrid integrated system is not affected by the hand tapping speed on TENG. Dynamic optical switching is realized which is further utilized to demonstrate the optical Morse code transmission. This hybrid integration is a crucial demonstration toward future self-sustainable wearable photonic IC, which will find significant applications in Internet of Things (IoT) and human-machine interface (HMI).","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"22 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85281704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.82063210089
T. Kosaka, A. Masuda
AbstractThis study presents a novel variable stiffness oscillator for vibration energy harvesting with resonant frequency tunability. Methods of tuning frequency include changing dimensions, moving center of gravity of the proofmass, and adding positive or negative stiffness in electrostatic ways, piezoelectric ways, or magnetic ways. In this study, an EPM-based variable stiffness mechanism for a vibration energy harvester was proposed and applied to a cantilever oscillator to examine its basic performance. It was described that the holding force of the EPM significantly depended on the activation process, and it was important to realize the full activation to exploit the potential performance of the EPM. Then, it was shown that the resonance frequency of the cantilever oscillator can be changed from 26Hz to 42 Hz when the EPM placed in the middle of the beam was fully activated, while the partially activated EPM could not maintain the resonance because of its weak holding force.
{"title":"An EPM-based Variable Stiffness Oscillator for Vibration Energy Harvesting","authors":"T. Kosaka, A. Masuda","doi":"10.1109/PowerMEMS49317.2019.82063210089","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.82063210089","url":null,"abstract":"AbstractThis study presents a novel variable stiffness oscillator for vibration energy harvesting with resonant frequency tunability. Methods of tuning frequency include changing dimensions, moving center of gravity of the proofmass, and adding positive or negative stiffness in electrostatic ways, piezoelectric ways, or magnetic ways. In this study, an EPM-based variable stiffness mechanism for a vibration energy harvester was proposed and applied to a cantilever oscillator to examine its basic performance. It was described that the holding force of the EPM significantly depended on the activation process, and it was important to realize the full activation to exploit the potential performance of the EPM. Then, it was shown that the resonance frequency of the cantilever oscillator can be changed from 26Hz to 42 Hz when the EPM placed in the middle of the beam was fully activated, while the partially activated EPM could not maintain the resonance because of its weak holding force.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"6 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85378378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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