3-Degree-of-freedom electromagnetic vibration energy harvester with serially connected leaf hinge joints

Kim, Hyun Soo; Ryu, Wooseok; Park, Shi Baek; Choi, Yong Je

doi:10.1177/1045389x18806397

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…In [55], a 3 degree of freedom (3-DOF) serial manipulator-type harvester was presented. The device was composed of a coil holder and three serially connected leaf hinge joints with a proof mass attached to the free end.…”

Section: Othersmentioning

confidence: 99%

A Review on Kinetic Energy Harvesting with Focus on 3D Printed Electromagnetic Vibration Harvesters

et al. 2021

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The increasing amount of Internet of Things (IoT) devices and wearables require a reliable energy source. Energy harvesting can power these devices without changing batteries. Three-dimensional printing allows us to manufacture tailored harvesting devices in an easy and fast way. This paper presents the development of hybrid and non-hybrid 3D printed electromagnetic vibration energy harvesters. Various harvesting approaches, their utilised geometry, functional principle, power output and the applied printing processes are shown. The gathered harvesters are analysed, challenges examined and research gaps in the field identified. The advantages and challenges of 3D printing harvesters are discussed. Reported applications and strategies to improve the performance of printed harvesting devices are presented.

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Section: Othersmentioning

confidence: 99%

A Review on Kinetic Energy Harvesting with Focus on 3D Printed Electromagnetic Vibration Harvesters

et al. 2021

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“…Jang et el [4] showed that there exist relatively simple geometrical relationships between vibration axes of in-and out-of-plane modes. Recently, some researchers [5]- [7] presented design methods of planar vibration system by use of geometric properties of in-plane modes. Park and Choi [8] utilized geometric properties of out-of-plane modes to design energy harvester with desired resonant frequencies.…”

Section: Aaamentioning

confidence: 99%

The Conditions for a Linear Vibration System to Have Only Pure Rotation Modes

Lee

Ryu

Choi³

et al. 2020

IEEE Access

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This paper proposes a geometric approach to the conditions for mode decoupling of a vibration system of an elastically supported single rigid body and presents the conditions that the system has only pure rotation modes of vibration. A small oscillation of a rigid body is indeed a repetitive screw motion and thus vibration modes are expressed by screws in general, which results in the difficulty involved in solving a vibration problem. The complexity of a vibration system can be alleviated for both analysis and synthesis if the system has only rotation modes. In order to acquire the decoupling techniques, this paper begins by investigating a stiffness matrix which can be separated into the sum of two rank 3 stiffness matrices, which are realizable by using co-reciprocal line vectors. From the co-reciprocity, the separable stiffness matrix can be regarded as a linear transformation between two 3-systems of screws containing only line vectors. Using the properties of the linear transformation and the screw systems, the conditions for mode decoupling, or the conditions for only pure rotation modes are derived and described by geometric relations between inertia and stiffness, and three cases of vibration systems with simple geometric nature are identified. INDEX TERMS Screw theory, linear vibration, mode decoupling, planes of symmetry, pure rotation mode.

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“…Kim et al [1] utilized those advantages to develop a design method of a 3-DOF vibration system for prescribed work ratios. This method was applied to the design of a vibration energy harvester composed of serial linkages [7], [8]. However, since a rigid body has 6-DOF in space, it may be said that a 6-DOF spatial system is more desirable for high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Design of a Spatial Vibration System for Prescribed Ratio of Energy Peaks

Lee

Choi²

2020

IEEE Access

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The work ratio is a primary factor in the applications relevant to wide bandwidth requirements because a bandwidth depends on resonant peaks. Especially, since a single-body system can have up to six resonant peaks, a six degree-of-freedom spatial system is more desirable for a broad bandwidth design. This paper presents a novel design method of a spatial vibration system for any prescribed ratio of energy peaks. Firstly, we introduce an important and concise geometric nature of a spatial vibration system with a single rigid body when it has only rotational vibration modes. The vibration modes represent vibration axes and six lines of action can be obtained by transforming the vibration modes by the mass matrix. It is shown that the six axes of vibration and six lines of action form two orthocentric tetrahedra that share the orthocenter coincident with the mass center. It is also shown that the stiffness matrix determined from two tetrahedra can always be realized by means of parallel connection of line springs. Using the orthocentric tetrahedra, we acquire analytical expressions for the energy produced by external forces at resonant frequencies, which is used to determine vibration modes that satisfy the requirements for given mass properties and six target resonant frequencies. Finally, the stiffness matrix that satisfies requirements is found and realized. To illustrate the process of the presented method, we use four numerical examples with different work ratios and demonstrate that the method is useful for a wide bandwidth.

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3-Degree-of-freedom electromagnetic vibration energy harvester with serially connected leaf hinge joints

Cited by 4 publications

References 38 publications

A Review on Kinetic Energy Harvesting with Focus on 3D Printed Electromagnetic Vibration Harvesters

A Review on Kinetic Energy Harvesting with Focus on 3D Printed Electromagnetic Vibration Harvesters

The Conditions for a Linear Vibration System to Have Only Pure Rotation Modes

Design of a Spatial Vibration System for Prescribed Ratio of Energy Peaks

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