A bistable vibration isolator with nonlinear electromagnetic shunt damping

Yan, Bo; Ma, Hongye; Zhang, Lu; Zheng, Wei; Wang, Ke; Chen, Wu

doi:10.1016/j.ymssp.2019.106504

Cited by 87 publications

(25 citation statements)

References 65 publications

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“…[22][23][24][25] To subsequently convert vibration energy into electricity, there are several energy transduction methods including [Correction added on 15 October 2020, after first online publication: the corresponding address of Junlei Wang has been corrected in this version of the article.] electromagnetic, [26][27][28][29] electrostatic 30,31 and piezoelectric effects. [32][33][34][35][36] Because of the advantage of high-power density, using piezoelectric materials for energy harvesting has attracted numerous research interests.…”

Section: Introductionmentioning

confidence: 99%

An experimental study of a two‐degree‐of‐freedom galloping energy harvester

Wang

Huang

et al. 2020

Int J Energy Res

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Summary The cut‐in wind speed and the power output are the two main concerns of a galloping energy harvester. A good galloping energy harvester is expected to have a low cut‐in wind speed and a high power output. This paper proposes a two‐degree‐of‐freedom (2‐DOF) galloping‐based piezoelectric energy harvester (GPEH) by mounting a secondary beam onto a primary piezoelectric cantilever beam. An experimental study is conducted to evaluate the actual energy harvesting performance of the proposed 2‐DOF GPEH. The effects of the secondary beam length and the mounting position on the cut‐in wind speed and the power output are investigated. It is revealed that the introduction of the secondary beam can reduce the cut‐in wind speed from 2.372 m/s to 1.961 m/s. Mounting the secondary beam further away from the bluff body weakens the influence of the secondary beam on the energy harvesting performance of the 2‐DOF GPEH. Moreover, the power output can be increased or decreased by tuning the secondary beam length. The power output from a well‐tuned 2‐DOF GPEH can be increased for about 111.1%, as compared to the conventional 1‐DOF GPEH. By contrast, the power output from a badly tuned 2‐DOF GPEH is reduced for about 22.2%. A simple theoretical model is developed for explaining the experimentally observed phenomenon and can be used to provide some guidelines in the design of 2‐DOF GPEH to avoid performance deterioration.

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Section: Introductionmentioning

confidence: 99%

An experimental study of a two‐degree‐of‐freedom galloping energy harvester

Wang

Huang

et al. 2020

Int J Energy Res

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“…It has been also shown in Refs. [15,16] that this technique could be effective to improve the control authority of nonlinear electromagnetic shunt damper. However, the designed system suffers from the stability issue which occurs when the total impedance of the circuit becomes negative [17].…”

Section: Introductionmentioning

confidence: 93%

Hybrid Electromagnetic Shunt Damper for Vibration Control

Paknejad

Zhao

Chesné

et al. 2020

Journal of Vibration and Acoustics

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It has been shown that shunting electromagnetic devices with electrical networks can be used to damp vibrations. These absorbers have however limitations that restrict the control performance, i.e. the total damping of the system and robustness vs parameter variations. On the other hand, the electromagnetic devices are widely used in active control techniques as an actuator. The major difficulty that arises in practical implementation of these techniques is the power consumption required for conditioners and control units. In this study, robust hybrid control system is designed to combine the passive electromagnetic shunt damper with an active control in order to improve the performance with low power consumption. Two different active control laws, based on an active voltage source and an active current source, are proposed and compared. The control law of the active voltage source is the direct velocity feedback. However, the control law of the active current source is a revisited direct velocity feedback. The method of maximum damping, i.e. maximizing the exponential time-decay rate of the response subjected to the external impulse forcing function, is employed to optimize the parameters of the passive and the hybrid control systems. The advantage of using the hybrid control configuration in comparison with purely active control system is also investigated in terms of the power consumption. Besides these assets, it is demonstrated that the hybrid control system can tolerate a much higher level of uncertainty than the purely passive control systems.

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“…Cam-roller-spring mechanism was also used for generating QZS characteristic for isolating vertical vibrations [13] , [14] , [15] , [16] , torsional vibrations [6] , [17] , and for adaptive pneumatic vibration isolator [1] . Other negative stiffness elements, such as bio-inspired structures [18] , [19] and electromagnetic structures [20] , [21] , [22] , were investigated for generating QZS feature. Recently, metamaterials and origami structures were also applied to achieve the QZS characteristics [23] , [24] , [25] , [26] , [27] .…”

Section: Introductionmentioning

confidence: 99%