Article
Engineering, Electrical & Electronic
Shuailing Sun, Yonggang Leng, Sunghoon Hur, Fei Sun, Xukun Su, Hyun-Cheol Song, Chong-Yun Kang
Summary: A nonlinear quad-stable piezoelectric energy harvester with only one external magnet is proposed based on the magnetic force characteristics. The stability characteristic of the harvester changes from quad-stability to bi-stability to mono-stability as the magnet spacing increases. Simulation results show that the performance of the harvester is better under quad-stable structural parameters than bi-stable structural parameters.
Article
Mathematics, Applied
Haitao Li, Bojian Dong, Fan Cao, Weiyang Qin, Hu Ding, Liqun Chen
Summary: This manuscript studies the nonlinear dynamical and harvesting characteristics of a bistable piezoelectric energy harvester (BPEH) under hybrid excitations. A distributed model of BPEH is established and the influences of wind speed, base excitation level, magnetic distance and resistance are investigated. The structure can be optimized to achieve the best harvesting performance for wind energy and vibration energy. The experimental results verify the analytical prediction and simulation results, and the study provides comprehensive insights into improving harvesting performance for hybrid ambient excitations.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Engineering, Mechanical
Xiaochun Nie, Sheng Pei, Ting Tan, Zhitao Yan, Zhimiao Yan
Summary: This study investigates the impact of internal resonance mechanism on the performance of vibration energy harvesters, including a theoretically verified model and analytically derived solutions. Experimental results indicate that the harvested power is associated with the electrical damping caused by the load resistance, and the internal resonance responses vary with the excitation amplitude and load resistance, exhibiting different stability characteristics.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Chemistry, Physical
Huai Zhao, Huajiang Ouyang, Haicheng Zhang
Summary: This study proposes a novel hybrid triboelectric-electromagnetic energy harvester and validates the accuracy of the theoretical model through experiments. The structural response and electrical output under different external excitations are theoretically investigated. It is found that the harvester has good sensitivity to small-angle ultra-low-frequency rocking excitations, making it an effective device for low-frequency energy harvesting.
Article
Engineering, Mechanical
V. De Biagi, B. M. Chiaia, G. C. Marano
Summary: Linear energy harvesters have a narrow frequency bandwidth and efficient operation relies on the excitation frequency close to the fundamental frequency. Nonlinearity in electromechanical devices is proposed to extend the bandwidth. This study optimizes a Duffing-type nonlinear energy harvester to reduce its size while maintaining power output.
PROBABILISTIC ENGINEERING MECHANICS
(2023)
Article
Thermodynamics
Shuailing Sun, Yonggang Leng, Xukun Su, Yuyang Zhang, Xiaoyu Chen, Junjie Xu
Summary: A novel dual-magnet TPEH with only one external magnet is proposed in this study, and the system transitions from a tri-stable state to a bi-stable state and then to a mono-stable state as the magnet distance increases, as revealed by the analysis of magnetic force expression and potential function. Simulation results show better output performance in the bi-stable state than in the tri-stable state under low excitation, while the output performance in the tri-stable state is better than in the bi-stable state under large excitation levels.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Mechanical
Li Hai-Tao, Ding Hu, Jing Xing-Jian, Qin Wei-Yang, Chen Li-Qun
Summary: The study proposes a TEH with a staircase-shaped potential well, which can execute snap-through at low frequencies and expand the bandwidth, generating high output voltages under weak excitation. The effectiveness of this design is demonstrated through theoretical analysis and experiments, showing potential for improved energy harvesting efficiency from ambient vibration.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Thermodynamics
Lucas Q. Machado, Panagiotis Alevras, Dmitri Tcherniak, Junlei Wang, Shengxi Zhou, Daniil Yurchenko
Summary: This study presents a high-power multi-beam piezoelectric energy harvesting device designed to meet the demands of emerging technologies in sensor networks, the Internet of Things, and industrial IoT. The device can be tuned to any frequency and demonstrates superior performance in the frequency range of 2-50 Hz, delivering hundreds of mW.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Computer Science, Information Systems
Jong Ho Moon, Jong Jin Park, Kang-Yoon Lee, Dong In Kim
Summary: The translation introduces an algorithm for optimizing a multi-module energy harvester, improving energy collection efficiency and maximizing utilization, suitable for low-power IoT devices.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Engineering, Mechanical
Wei Chen, Jiliang Mo, Huajiang Ouyang, Zaiyu Xiang, Jing Zhao
Summary: A bistable energy harvester in a friction system is modeled and numerically investigated. The study reveals that the vibration pattern of the energy harvester can be very complex under the influence of loading force and belt velocity, exhibiting various behaviors such as quasi-periodic, chaotic, and periodic oscillations.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Civil
Nicholas D. Oliveto
Summary: A three-dimensional formulation is presented for a mass sliding with friction on a concave spherical surface, which is used to describe the behavior of friction pendulum systems under extreme tri-directional excitation. The proposed approach accounts for large deformations and includes a procedure for handling the characteristic stop-and-go motion of friction-based systems. Numerical examples and earthquake simulations demonstrate the accuracy of the computed solutions and the vulnerability of friction pendulum systems to ground motions.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Mechanical
Yong-yong Cao, Jian-hong Yang, De-bin Yang
Summary: This study investigates the synergistic transition mechanism and magnetic force model of rotation energy harvesters. A new transition and regulation mechanism is proposed, and a modified magnetic force model is established. The transition mechanism of different oscillation states in the rotation system is explored using static bifurcation, potential diagram, and dynamic behaviors. The effectiveness of the theoretical model is validated through experiments, showing good agreement with numerical results. The proposed harvester can effectively harvest energy in a wide rotation speed range of 280-500 rpm, with an output voltage and power of 6.4 V and 4 mW.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Energy & Fuels
Wonil Kwak, Yongbok Lee
Summary: This study focuses on improving the energy efficiency of a piezoelectric energy harvester with a novel fractal structure by optimizing a model and investigating coupling coefficients. The fractal design efficiently converts energy responses at various frequencies.
Article
Mechanics
Yanxia Zhang, Yanfei Jin, Zhonghua Zhang
Summary: This paper investigates the stochastic dynamics of a tri-stable piezoelectric-electromagnetic hybrid vibration energy harvester driven by narrow-band random excitation. The results show the existence of stochastic jump phenomenon and the extension of operational bandwidth. The effects of narrow-band random excitation, system parameters, and asymmetric potential function on the stochastic dynamics are discussed.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Thermodynamics
Xudong Wang, Qi Wang, Wei Wang, Yongjie Cui, Yuling Song
Summary: A novel piezoelectric-mechanical electromagnetic compound vibration energy harvester (P-MECVEH) was proposed to address the energy waste issue during the electric tractor's travel on rugged ground.
