Article
Thermodynamics
Bin Bao, Shaoyi Zhou, Quan Wang
Summary: The proposed structure demonstrated positive coupling effects between internal resonance and nonlinearity, resulting in a three times wider internal resonance bandwidth for energy harvesting in the x-direction compared to traditional systems. Additionally, the structure achieved an additional internal resonant frequency range (3.4 Hz-4.3 Hz) for enhancing energy harvesting performance in the z-direction. Experimental results showed a maximum power output of 0.64 mW at 7.5 Hz in the investigated frequency domain.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Mechanics
Tianjun Yu, Sha Zhou
Summary: This paper introduces a composite structure for parametrically excited piezoelectric energy harvesting, and analyzes its performance through numerical simulations and frequency response analysis. By comparing the advantages and disadvantages of parametrically excited and directly excited energy harvesters, it elucidates the working principle of vibratory energy harvesters.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Nir Ben Shaya, Izhak Bucher, Amit Dolev
Summary: The article introduces a closed-loop control scheme that can stabilize a parametrically excited nonlinear structure in multiple vibration modes by setting the relative phase. This scheme helps utilize structures as sensors, improving stability and sensitivity. By controlling the phase, an optimal operating point can be set to achieve high sensitivity to the sensed potential field.
NONLINEAR DYNAMICS
(2021)
Article
Engineering, Mechanical
Simona Di Nino, Angelo Luongo
Summary: This study investigates the aeroelastic behavior of a planar prismatic visco-elastic structure under turbulent wind, analyzing the interaction between the steady and turbulent components of wind in a three-dimensional parameter space. Aeroelastic forces are computed, and a multiple scale method and linear stability analysis are used to study the system.
NONLINEAR DYNAMICS
(2021)
Article
Instruments & Instrumentation
Qiang Yan, Xianzhi Dai, Zhang Zhang, Lijun Wang, Yong Wang
Summary: This paper proposes a broadband vibration energy harvester based on nonlinear magnetic force and rotary pendulums. By utilizing magnetic nonlinearity, the working bandwidth of the harvester is improved. The mechanical-magnetic-electrical analytical model of the harvester is established, and the theoretical value obtained by the model is consistent with the experimental value. The results demonstrate that the harvester exhibits strong nonlinearity through magnetic force.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Thermodynamics
Zhemin Wang, Tianrun Li, Yu Du, Zhimiao Yan, Ting Tan
Summary: This paper presents a spring-based bistable energy harvester (SBEH) with two configurations (SBEHsup and SBEHsub) to achieve high working efficiency under different excitation levels through inter-well modulation. The nonlinear force generated by compressed springs broadens the effective bandwidth of the SBEH, while the SBEH-sub configuration utilizes magnetic force to dynamically alter the potential energy threshold, enhancing working performance under lower intensity excitation.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Mechanical
Yi Yang, Hongjun Xiang
Summary: The traditional linear piezoelectric energy harvesters (PEHs) have a limited operating bandwidth. Researchers have shown increased interest in nonlinear PEHs to achieve broadband energy harvesting and improve harvested efficiency. Introducing a nonlinear magnetic interaction is one of the most straightforward methods for this purpose. Previous theoretical analysis had only approximated the nonlinear magnetic force, which differed from accurate numerical modeling or testing results. To reduce this error, this study proposes two high-precision magnetic force formulas for cylindrical and cuboidal magnets, based on previous magnetic formulas and introducing two correction parameters. The correction process is simple, with a relative error of the magnetic force of less than 1%. Explicit expressions for the correction parameters are given based on magnetic field theory.
NONLINEAR DYNAMICS
(2023)
Article
Chemistry, Physical
Chuguo Zhang, Linglin Zhou, Ping Cheng, Di Liu, Chunlei Zhang, Xinyuan Li, Shaoxin Li, Jie Wang, Zhong Lin Wang
Summary: The BM-TENG module demonstrates high output performance and adaptability in actual marine environments, marking a significant advancement in wave energy harvesting. Optimized in structure and material, the BM-TENG achieves a milestone power density of 200 W m(-3), representing an improvement of 1-2 orders of magnitude compared to previous research. Integrating TENG into vessels allows for elimination of environmental impact, convenient maintenance, easy connection, and long-term stable operation.
ADVANCED ENERGY MATERIALS
(2021)
Article
Mechanics
M. Serrano, K. Larkin, M. Ghommem, S. Tretiak, A. Abdelkefi
Summary: A multi-purpose energy harvesting microgyroscope system based on piezoelectric materials is proposed for small devices in remote areas. Numerical analysis shows that a system with a non-symmetric beam design is suitable for broadband energy harvesting. The nonlinear softening effects create a broadband frequency response with high voltage output, but careful selection of DC and AC voltages is necessary to avoid dynamic pull-in.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Thermodynamics
Jiatong Chen, Bin Bao, Jinlong Liu, Yufei Wu, Quan Wang
Summary: This study presents a piezoelectric wind energy harvester with a magnetic chaotic pendulum to enhance energy harvesting technologies through chaotic beam vibration for nonlinear energy harvesting. Particle swarm optimization combined with a neural network was adopted to optimize the output power, with results showing adaptability to natural wind environment and a wider working flow velocity range compared to traditional energy harvesters.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Mechanical
Hailing Fu, Jingjing Jiang, Sijung Hu, Jing Rao, Stephanos Theodossiades
Summary: This paper presents the design, modeling, and experimental verification of a quad-stable energy harvester that utilizes a nonlinear pendulum and piezoelectric transduction to harness ultra-low frequency random motions. The use of multiple stable positions created by magnetic forces allows effective conversion of low-frequency motions into oscillations, resulting in enhanced output power. The theoretical model considers magnetic interaction, piezoelectric conversion, and pendulum dynamics to describe the harvester's electromechanical behavior. Experimental results confirm the efficacy of the harvester and a parametric study demonstrates the influence of different parameters on output power and operating frequency range. The integration of the harvester with power management circuitry enables battery-free wireless sensing for IoT applications.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Thermodynamics
Xunwen Su, Chang Tong, Huiren Pang, Mileta Tomovic
Summary: In this paper, a structural model of an electromagnetic energy harvesting device using motion of a pendulum rod is constructed and the natural frequency characteristics and electromagnetic field finite element simulation analysis of the model are carried out. The experimental results show that the natural frequency of the device can be tuned linearly in the range of 7 Hz-13.5 Hz, with a maximum induced electromotive force of 1.37 V and a maximum power of 521 mW. Compared with traditional devices, this model has the advantage of adjustable natural frequency and higher energy harvesting efficiency.
Article
Energy & Fuels
Hyo-Kyung Shim, Shuailing Sun, Hyun-Soo Kim, Dong-Gyu Lee, Yeon-Jeong Lee, Ji-Soo Jang, Kyung-Hoon Cho, Jeong Min Baik, Chong-Yun Kang, Yonggang Leng, Sunghoon Hur, Hyun-Cheol Song
Summary: A nonlinear piezoelectric energy harvester with a coupled beam array is designed to broaden bandwidth and improve energy harvesting performance. Experimental results show that the harvester outperforms traditional non-coupled multi-resonance harvester, with 144.2% higher output power and a 93.3% wider bandwidth in a certain frequency range. The harvester can be used in unstable or varying conditions.
Article
Engineering, Mechanical
Franco E. Dotti, Juan N. Virla
Summary: Nonlinear dynamics tools were used to quantify the energy recovery ability of pendulum harvesters from sea waves in this article. The versatility of pendulum harvesters was highlighted, with devices shown to scale for producing usable energy ranging from 6 W to 10 kW. The dynamics of the pendulum influencing power generation were discussed using bifurcation diagrams, parameter spaces, and basins of attraction, with identified parameter ranges minimizing the need for control action and explaining the improvement in power generation from tilting the pendulum's plane of rotation.
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2021)
Article
Acoustics
Ao Zhang, Vladislav Sorokin, He Li
Summary: This paper focuses on a novel configuration of pendulum absorber harvester using magnets, which improves vibration suppression and energy harvesting characteristics. The results show superior performance compared to conventional devices in both aspects. Experimental testing validates the theoretical results.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Electrical & Electronic
James Graves, Meiling Zhu
Summary: This work presents a pendulum kinetic energy harvester with a unique mechanical motion rectifier design, which efficiently converts bidirectional input oscillation into unidirectional rotation of a DC motor. Through experimentation, the energy harvester achieved high power output and voltage production at the resonant frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Review
Chemistry, Physical
Huifang Xiao, Min Pan, Jun Yu Harry Chu, Chris R. Bowen, Sebastian Bader, Javier Aranda, Meiling Zhu
Summary: This paper provides a comprehensive overview of the state of the art in hydraulic pressure energy harvesting, including the fundamentals, choice of materials and device structures, and fluid-mechanical interface. It also discusses novel approaches for improving energy harvesting and potential applications, as well as proposed future research directions.
ADVANCED ENERGY MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
James Graves, Yang Kuang, Meiling Zhu
Summary: This paper presents the integration of a novel mechanical torsion spring regulator into a pendulum energy harvester system. The regulator provides voltage-smoothing benefits and acts as a buffer for sudden impacts, reducing torque stress on critical components to improve system reliability. Experimental results show a reduction in voltage fluctuation range and improved start-up response compared to devices with flywheels.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Youchao Qi, Guoxu Liu, Yang Kuang, Lu Wang, Jianhua Zeng, Yuan Lin, Han Zhou, Meiling Zhu, Chi Zhang
Summary: This study proposes a V-TENG with two stoppers and a charge pumping effect to broaden the frequency band and enhance the charge density. The experimental results show that compared to a V-TENG with a single stopper, the one with two stoppers can increase the bandwidth by 75% at a certain gap distance. Furthermore, a charge pump can significantly improve the surface charge density by about 14 times. This research is significant in enhancing the performance of V-TENGs and has great potential in harvesting wideband vibration energy from various sources.
Article
Engineering, Electrical & Electronic
Zheng Jun Chew, Yang Kuang, Meiling Zhu
Summary: This article presents a self-configurable and self-powered active rectifier for energy harvesting applications. The circuit is capable of starting up from a low voltage and provides a higher voltage through voltage doubling topology. When the voltage exceeds a certain threshold, the circuit switches to a full-wave rectifier without amplification. Experimental results show that the rectifier can start up from 0.25V and achieve over 90% voltage and power conversion efficiencies in most cases.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Mechanical
Guansong Shan, Meiling Zhu
Summary: A piezo stack energy harvester with frequency up-conversion method is proposed in this study to achieve high-power output, showing good performance. Numerical simulation and finite element analysis are conducted to validate the effectiveness of the proposed method.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Guansong Shan, Yang Kuang, Meiling Zhu
Summary: This study presents the design and testing of a piezo stack energy harvester with frequency up-conversion mechanism for scavenging energy from railway track vibration. The experimental results show that the proposed harvester has high power generation efficiency under specific conditions.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Nanoscience & Nanotechnology
Philippe Basset, Stephen Paul Beeby, Chris Bowen, Zheng Jun Chew, Ahmad Delbani, R. D. Ishara G. Dharmasena, Bhaskar Dudem, Feng Ru Fan, Dimitri Galayko, Hengyu Guo, Jianhua Hao, Yuchen Hou, Chenguo Hu, Qingshen Jing, Young Hoon Jung, Sumanta Kumar Karan, Sohini Kar-Narayan, Miso Kim, Sang-Woo Kim, Yang Kuang, Keon Jae Lee, Jialu Li, Zhaoling Li, Yin Long, Shashank Priya, Xianjie Pu, Tingwen Ruan, S. Ravi P. Silva, Hee Seung Wang, Kai Wang, Xudong Wang, Zhong Lin Wang, Wenzhuo Wu, Wei Xu, Hemin Zhang, Yan Zhang, Meiling Zhu
Proceedings Paper
Automation & Control Systems
Zheng Jun Chew, Meiling Zhu
Summary: This paper presents a technique to enhance the charging time and efficiency of an energy storage capacitor that is directly charged by an energy harvester based on the open circuit voltage (V-OC) of the energy harvester. The proposed method achieves an equivalent charging efficiency of over 81% by charging the capacitor directly from the energy harvester until it reaches 0.75V(OC) of the energy harvester. A control circuit is introduced to detect the charging instance, and the proposed circuit achieves a faster charging time and higher final capacitor voltage compared to a conventional boosting scheme.
Proceedings Paper
Automation & Control Systems
Guansong Shan, Yang Kuang, Meiling Zhu
Summary: A piezo stack energy harvester using the frequency up-conversion method with attractive magnetic force is proposed and experimentally validated for harvesting energy from rail track vibration. The collision motion induced by the magnetic force can enhance the energy harvesting efficiency.
