Modeling and analysis of magnetic spring enhanced lever-type electromagnetic energy harvesters

Article Energy & Fuels

A low-frequency rotational electromagnetic energy harvester using a magnetic plucking mechanism

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Summary: This study proposes a low-frequency rotational electromagnetic energy harvester using a nonlinear magnetic plucking configuration and resetting effect to improve energy harvesting performance.

APPLIED ENERGY (2022)

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Article Engineering, Mechanical

Design of a structure-based bistable piezoelectric energy harvester for scavenging vibration energy in gravity direction

Zehao Wu et al.

Summary: This paper presents a novel bistable piezoelectric energy harvester that combines elastic potential energy and gravitational potential energy to achieve bistability, simplifying the design process. Experimental results demonstrate that the harvester is more suitable for harvesting energy in the direction of gravity.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2022)

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Article Engineering, Mechanical

Investigation of an ultra-low frequency piezoelectric energy harvester with high frequency up-conversion factor caused by internal resonance mechanism

Yipeng Wu et al.

Summary: This paper introduces a frequency up-converting energy harvester that can efficiently capture ambient mechanical energy with ultra-low natural frequency and upconvert the frequency with a high conversion factor. The harvester has the potential to be applied in real-world systems with low vibration frequencies, generating relatively high output power even at low excitation frequency and amplitude. Additionally, the output power can be further optimized by improving the electromechanical coupling coefficient.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2022)

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Article Engineering, Mechanical

Characterizing nonlinear characteristics of asymmetric tristable energy harvesters

Xiaoqing Ma et al.

Summary: This research aims to explore the nonlinear characteristics and energy harvesting performance of asymmetric tristable energy harvesters. By predicting chaotic motion using the Melnikov method and verifying it through numerical simulations, the study reveals the performance and response mechanism of asymmetric tristable energy harvesters.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2022)

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Article Engineering, Mechanical

Dynamically synergistic regulation mechanism for rotation energy harvesting

Lin-Chuan Zhao et al.

Summary: This study proposes a novel dynamically synergistic regulation mechanism for rotation energy harvesting in order to achieve sustainable energy supply for wireless sensor networks. Through experiments and simulations, the effectiveness and efficiency of this mechanism are verified. This research is of great significance for improving the comprehensive performance of rotation energy harvesters.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2022)

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Article Engineering, Mechanical

A theory for bistable vibration isolators

Bo Yan et al.

Summary: This paper presents a general theory for bistable vibration isolators (BVIs) and reveals the bistable vibration isolation mechanism. The advantages of BVIs in vibration isolation are quantitatively verified through theoretical and numerical calculations, providing guidance for the design, analysis, and optimization of BVIs.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2022)

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Article Acoustics

Enhancement of Wave Energy Dissipation in Two-Dimensional Acoustic Black Hole by Simultaneous Optimization of Profile and Damping Layer

Wei Huang et al.

Summary: The paper investigates the simultaneous optimization of the geometric parameters of an acoustic black hole (ABH) structure and the topology of the damping layer to achieve maximum wave energy dissipation. The optimal design is obtained through parametric modeling and finite element software calculations, showing efficient results in finding the optimal design for the ABH structure. The influence of mesh size and wave incidence direction on the optimization is discussed, with significant performance improvements achieved by the proposed method.

JOURNAL OF SOUND AND VIBRATION (2021)

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Review Energy & Fuels

Review of vibration-based electromagnetic-piezoelectric hybrid energy harvesters

Muhammad Masood Ahmad et al.

Summary: This paper discusses the use of environmental energy sources such as thermal, solar, wind, vibration, RF, and acoustic energy to power wireless sensor nodes, as well as the technology of harvesting vibration energy using transduction mechanisms like piezoelectric and electromagnetic. It also introduces various types of hybrid vibration energy harvesters and their performance indicators.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2021)

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Review Automation & Control Systems

Inerter-like devices used for vibration isolation: A historical perspective

Willian M. Kuhnert et al.

Summary: The paper discusses the inerter as a new mechanical element for vibration isolation, highlighting its advantages in improving high-frequency performance compared to traditional isolation systems. It establishes a connection between old and new ideas, and thoroughly examines the application of the inerter in mechanical systems.

JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS (2021)

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Article Engineering, Mechanical

A multi-directional multi-stable device: Modeling, experiment verification and applications

Tao Yang et al.

Summary: The multi-stable vibration energy harvester based on spring-mass system has attracted widespread attention due to its advantages of low natural frequency, simple structure, and high output power. By using a link mechanism to improve the bistable oscillator, a multi-directional multi-stable device has been proposed, which can generate large amplitude response at ultra-low frequencies and enable motion throughout all equilibrium positions. Both theoretical and experimental data support the efficiency of the designed prototype for energy harvesting from ultra-low frequency vibration sources.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Article Thermodynamics

A lever-type piezoelectric energy harvester with deformation-guiding mechanism for electric vehicle charging station on smart road

Deok Hwan Jeon et al.

Summary: This study presents a novel concept to enhance the energy generation performance of piezoelectric energy harvesters used as charging stations on roads, overcoming the limitations of low electrical output and durability under extremely low road displacement conditions. The proposed lever-type piezoelectric energy harvester achieved significantly higher electrical performance compared to previous studies, with 467% higher output power than vibration type road energy harvesters. The results demonstrate that the energy generated by the proposed harvester can potentially be used as a power source for electric vehicles on smart roads.

ENERGY (2021)

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Article Acoustics

A novel lever-type vibration isolator with eddy current damping

Bo Yan et al.

Summary: This study proposes a lever-type vibration isolator with eddy current damping, which can broaden the isolation band by adjusting the lever ratio and improve the vibration suppression performance. The effects of lever ratio, tip mass, material properties, geometric parameters, and excitation amplitude on vibration isolation performance are analyzed. ECD can further enhance vibration suppression in the resonance region, while transmissibility tends to stabilize in the isolation region with increasing lever ratio.

JOURNAL OF SOUND AND VIBRATION (2021)

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Article Engineering, Mechanical

Enhanced electromagnetic wrist-worn energy harvester using repulsive magnetic spring

Mingjing Cai et al.

Summary: This study introduces a method of improving the performance of wrist-worn inertial energy harvesters using a repulsive magnetic spring. Experimental results show that the repulsive magnetic spring can significantly increase the output power of the energy harvester, and the smaller the air gap, the more pronounced the improvement.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Article Acoustics

Energy harvesting using a novel autoparametric pendulum absorber-harvester

Ao Zhang et al.

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)

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Review Chemistry, Physical

Rotational energy harvesting for self-powered sensing

Hailing Fu et al.

Summary: This paper comprehensively reviews the state-of-the-art progress in rotational energy harvesting, including energy characteristics, harvester categories, methodologies, mechanisms, and applications. Key developments, critical challenges, and potential research directions and opportunities are summarized and discussed based on progress to date.

JOULE (2021)

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Article Engineering, Mechanical

Modeling and experimental investigation of a novel bistable two-degree-of-freedom electromagnetic energy harvester

Ning Yu et al.

Summary: This study investigates the energy harvesting enhancement of a two-degree-of-freedom bistable electromagnetic energy harvester by designing the interaction between magnetic forces. Theoretical analysis and experimental verification are conducted to explore the impact of various parameters on the energy harvesting performance, revealing the importance of mass ratio, frequency ratio, potential well, and excitation amplitude.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Article Chemistry, Physical

Triboelectric-electromagnetic hybrid nanogenerator driven by wind for self-powered wireless transmission in Internet of Things and self-powered wind speed sensor

Xueming Fan et al.

NANO ENERGY (2020)

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Design, modeling and experiments of broadband tristable galloping piezoelectric energy harvester

Junlei Wang et al.

ACTA MECHANICA SINICA (2020)

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Article Physics, Applied

Exploiting the advantages of the centrifugal softening effect in rotational impact energy harvesting

Shitong Fang et al.

APPLIED PHYSICS LETTERS (2020)

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Scavenging vibrational energy with a novel bistable electromagnetic energy harvester

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Article Thermodynamics

A two-degree-of-freedom string-driven rotor for efficient energy harvesting from ultra-low frequency excitations

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ENERGY (2020)

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Performance evaluation of a dual-piezoelectric-beam vibration energy harvester with a lever and repulsive magnets

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Theoretical modeling and experimental analysis of nonlinear electromagnetic shunt damping

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Bio-inspired bi-stable piezoelectric harvester for broadband vibration energy harvesting

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A two-stage electromagnetic coupling and structural optimisation for vibration energy harvesters

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A vibratory energy harvesting absorber using integration of a lever-enhanced nonlinear energy sink and a levitation magnetoelectric energy harvester

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Ultra-low frequency energy harvesting using bi-stability and rotary-translational motion in a magnet-tethered oscillator

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Wind energy harvesting from a conventional turbine structure with an embedded vibro-impact dielectric elastomer generator

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Capturing energy from ultra-low frequency vibrations and human motion through a monostable electromagnetic energy harvester

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High-performance piezoelectric wind energy harvester with Y-shaped attachments

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A water-proof magnetically coupled piezoelectric-electromagnetic hybrid wind energy harvester

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A bio-inspired host-parasite structure for broadband vibration energy harvesting from low-frequency random sources

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Modeling and analysis of magnetic spring enhanced lever-type electromagnetic energy harvesters

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