A space-coiling resonator for improved energy harvesting in fluid power systems

Aranda, Jesus Javier Lechuga; Bader, Sebastian; Oelmann, Bengt

doi:10.1016/j.sna.2019.01.022

Cited by 10 publications

(4 citation statements)

References 15 publications

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“…The units update the displacement chamber pressures also using Euler method with Equation ( 7), described further in Section 3.1 to calculate the pressure build-up rate. After the pressure updating loop is repeated 500 times, the flows on the ports are calculated according to the summation of the flows entering and exiting each displacement chamber, as described by Equations ( 9) and (10). These total flows are then provided to the lines adjacent to the units.…”

Section: Simulationmentioning

confidence: 99%

“…The summation of flow going in and out each chamber Q ri consists of the addition of flow between the given chamber and high-pressure port Q rHPi and low-pressure port Q rLPi (8). These flows are calculated by the orifice Equations ( 9) and (10), which are derived from Bernoulli's equation by assuming an incompressible fluid. The respective orifices A rHPi , and A rLPi will be equivalent cross-sectional opening areas between the displacement chamber pressure ports and the unit valve-plate in a given moment of time.…”

Section: Axial Piston Unit Modelmentioning

confidence: 99%

“…Usually, fluid borne-noise reduction strategies are divided into reducing source flow ripple or introducing noise mitigation devices. Popular hydraulic circuit elements for limiting pressure ripple are closed-branch silencers [7], Helmholtz resonator [8][9][10], and adaptive Helmholtz resonators [5,6], Multi-element buffer bottles [11], vibration absorbing techniques [3,12]. Active load methods also had been tried, such as active variable chamber volume actuators, installed the delivery line [13].…”

Section: Introductionmentioning

confidence: 99%

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A Tandem Axial-Piston Unit Based Strategy for the Reduction of Noise Sources in Hydraulic Systems

Danes¹,

Vacca²

2020

Energies

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This article presents a novel passive fluid borne noise source reduction strategy, based on tandem axial-piston unit indexing with the usage of symmetric lines. The strategy consists of setting the phase between the two synchronous units to accomplish destructive interference in targeted unit harmonics. A strategy capable of achieving destructive interference in all odd harmonics is investigated first analytically and then confirmed by a simulation study. Experiments on the proposed strategy confirmed its effectiveness at the first and third pump fundamental harmonics, and pressure ripple reduction was accomplished. The fluid borne noise source reduction in the first and third harmonic is verified to be propagated to pipe vibration and sound power. Regarding the first harmonic, pressure ripple was reduced by up to 18 dB; while for third harmonic, pressure ripple was reduced by up to 11 dB. In the experiment, however, noise cancellation is not achieved for the higher odd harmonics, as is instead found in the simulation. Conversely, transfer functions form pressure ripple to pipe wall acceleration are obtained experimentally, and a critical vibration band from 2000 Hz to 3000 Hz is identified as being crucial for effective overall sound power reduction.

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Section: Simulationmentioning

confidence: 99%

Section: Axial Piston Unit Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Tandem Axial-Piston Unit Based Strategy for the Reduction of Noise Sources in Hydraulic Systems

Danes¹,

Vacca²

2020

Energies

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“…In previous studies, the Helmholtz acoustic resonator is adopted to amplify the incident sound pressure [18][19][20][21][22][23][24], as well as the fluid ripple pressure [25,26]. The quarter-wavelength acoustic resonator has also been investigated, revealing that substantial electrical power can be generated [27].…”

Section: Introductionmentioning

confidence: 99%

Joint acoustic energy harvesting and noise suppression using deep-subwavelength acoustic device

Yuan

Xiao

Cao

et al. 2020

Smart Mater. Struct.

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Aiming to simultaneously realize acoustic energy harvesting (AEH) and noise suppression, this study proposes a novel deep subwavelength acoustic device. The proposed device is composed of an acoustic resonator with a compliant bottom. At the acoustic resonance frequency of the device, sound pressure difference will excite the compliant part and generate substantial strain energy within the substrate. The electrical energy is then generated from the bonded piezoelectric patch on the substrate. Specifically, an embedded logarithmic spiral neck is adopted to make the device compact. Moreover, compared to the uniform neck configuration, the proposed spiral configuration is able to improve sound pressure amplification performance, which is demonstrated via numerical simulation and experimental studies. For the single AEH unit performance, experimental results show 8.1 μW electrical power can be harvested at 100 dB sound pressure level (SPL) excitation. At the acoustic resonant frequency, the proposed device is deep subwavelength, which is only 1/76 of the interested wavelength. Furthermore, when the AEH array configuration is adopted, simultaneous noise and energy harvesting functions can be realized. Experimental results show that the acoustic energy can be converted into electrical power, which is able to power a pedometer device. Meanwhile, the noise reduction performances concerning different excitation cases are notable. The proposed AEH system saves space and is multifunctional, which can be applied to the industrial application in the near future.

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Hydraulic Pressure Ripple Energy Harvesting: Structures, Materials, and Applications

Xiao

Pan

Chu

et al. 2022

Advanced Energy Materials

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The need for wireless condition monitoring and control of hydraulic systems in an autonomous and battery‐free manner is attracting increasing attention in an effort to provide improved sensing functionality, monitoring of system health, and to avoid catastrophic failures. The potential to harvest energy from hydraulic pressure ripples and noise is particularly attractive since they inherently have a high energy intensity, which is associated with the hydraulic mean pressure and flow rate. This paper presents a comprehensive overview of the state of the art in hydraulic pressure energy harvesting, which includes the fundamentals of pressure ripples in hydraulic systems, the choice of electroactive materials and device structures, and the influence of the fluid–mechanical interface. In addition, novel approaches for improving the harvested energy and potential applications for the technology are discussed, and future research directions are proposed and outlined.

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A space-coiling resonator for improved energy harvesting in fluid power systems

Cited by 10 publications

References 15 publications

A Tandem Axial-Piston Unit Based Strategy for the Reduction of Noise Sources in Hydraulic Systems

A Tandem Axial-Piston Unit Based Strategy for the Reduction of Noise Sources in Hydraulic Systems

Joint acoustic energy harvesting and noise suppression using deep-subwavelength acoustic device

Hydraulic Pressure Ripple Energy Harvesting: Structures, Materials, and Applications

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