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

Danes, Leandro; Vacca, Andrea

doi:10.3390/en13205377

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…The valve plate, particularly in the regions where the outlet and inlet ports transition, has a significant influence on the noise level. Various methods have been employed to investigate noise reduction in axial piston pumps [21][22][23], and one effective approach is optimizing the design of the valve plate [24]. The design of the valve plate affects the pressure and flow characteristics within the piston chamber and ports, which are directly related to the sources of noise [25].…”

Section: Introductionmentioning

confidence: 99%

A Multi-strategy Enhanced Dung Beetle Optimization Algorithm and Its Application in Engineering

Zhang,

Zhang

2024

Preprint

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This paper introduces a novel multi-strategy enhanced dung beetle optimization (MSDBO) algorithm that is designed to address several issues identified in the standard dung beetle optimization algorithm. Specifically, the MSDBO aims to enhance convergence speed, reduce susceptibility to local optima, and increase search accuracy. By incorporating three strategies: tent chaotic mapping for population initialization, the golden sinusoidal strategy for position updating, and the Lévy flight strategy for balancing exploration and exploitation, the standard dung beetle optimization algorithm is enhanced. The MSDBO algorithm is evaluated using twelve benchmark test functions and compared against five state-of-the-art algorithms. The results consistently show that MSDBO exhibits faster convergence speeds and more accurate solutions than the other algorithms across most of the test functions. In addition, MSDBO is also applied to optimize the parameters of a valve plate, including the close angle, cross angle, triangle groove sizes, and wrap angle. The optimization outcomes reveal that MSDBO effectively minimizes pressure ripples in the piston chamber, resulting in reduced flow rate fluctuations and noise emission compared to the initial design. This study highlights the potential of the MSDBO algorithm in tackling complex nonlinear engineering optimization problems.

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Section: Introductionmentioning

confidence: 99%

A Multi-strategy Enhanced Dung Beetle Optimization Algorithm and Its Application in Engineering

Zhang,

Zhang

2024

Preprint

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“…As bubbles move from a low-pressure location to a high-pressure area, they compress and burst, and the energy released when the bubbles burst creates noise and vibration [2][3][4][5]. Hydraulic system noise is classified as fluid noise, cavitation noise, and mechanical noise [6], of which cavitation phenomenon generates cavitation noise [7]. Because of its high sound level and high radiation efficiency, noise generated by cavitation bubble collapse is a key noise source for hydraulic valves [8], and its noise creation is strongly tied to the cavitation phenomena.…”

Section: Introductionmentioning

confidence: 99%

Cavitation Observation and Noise Characteristics in Rectangular Throttling Groove Spool

Zhang,

Fu,

Zhang

et al. 2023

Processes

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A hydraulic cavitation platform was developed in order to examine the occurrence of cavitation in the rectangular throttling groove spool and its correlation with noise characteristics. The test valve is constructed using PMMA material, which possesses excellent transparency. This transparency enables direct visual examination of cavitation occurring at the throttle slot. Additionally, high-speed photography is employed to observe the flow characteristics of the valve port, facilitating the analysis of cavitation morphology changes. Furthermore, a noise meter is utilized to measure and record the noise level and its corresponding spectrum. The flow field and flow phenomena at the rectangular throttling groove spool were studied using high-speed photography, noise spectrum analysis, and other methods. It is discovered that back pressure has the greatest influence on cavitation and flow separation, followed by the influence of intake pressure on cavitation morphology and noise. As the back pressure lowers, the cavitation morphology changes from flaky to cloudy, and the cavitation intensity, distribution area, and noise level increase. Background noise and cavitation noise have distinct frequency differences; cavitation noise in the rectangular throttling groove spool is high-frequency noise, with a frequency of more than 8 kHz, and the higher the frequency, the greater the difference in noise value. The magnitude of the alterations in noise intensity is minimal. The noise values exhibit slight variations of 2.3 dB, 4 dB, and 4.3 dB under varying back pressure circumstances of 3 MPa, 4 MPa, and 5 MPa inlet pressure, respectively. It is recommended to use the frequency of cavitation noise to detect the cavitation state and monitor the cavitation process. In the low-frequency region, the cavitation noise in the rectangular throttle groove valve core is not significantly different. Once the center frequency surpasses 3.15 kHz, a discernible distinction emerges, with the magnitude of the discrepancy in noise value increasing as the frequency rises. In other words, the cavitation cloud does not pulsate at one single frequency, but rather in a range of relatively high frequencies (more than 3.15 kHz).

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“…The paper [ 11 ] presents an innovative strategy of passive reduction in the source of noise transmitted by fluids, based on indexing the axial piston assembly in tandem with the use of symmetrical lines. Analytical tests were carried out and then confirmed in a simulation test.…”

Section: Introductionmentioning

confidence: 99%

Application of the MEMS Accelerometer as the Position Sensor in Linear Electrohydraulic Drive

Rybarczyk

2021

Sensors

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Various distance sensors are used as measuring elements for positioning linear electrohydraulic drives. The most common are magnetostrictive transducers or linear variable differential transformer (LVDT) sensors mounted inside the cylinder. The displacement of the actuator’s piston rod is proportional to the change in the value of the current or voltage at the output from the sensor. They are characterized by relatively low measurement noise. The disadvantage of presented sensors is the need to mount them inside the cylinders and the high price. The article presents preliminary research on the replacement of following sensors and the use of a microelectromechanical system (MEMS) accelerometer as a measuring element in the electrohydraulic drive control system. The control consisted of two phases: at first, the signal from the acceleration sensor was analyzed during the actuator movement, based on the value determined from the simplified model implemented on the controller. In the range of motion in which the dynamics were the lowest, the signal was integrated and the obtained value was used in the second phase of motion. In the correction phase, a new set point was determined. Conducting the research required building a dedicated research stand. The author conducted the simulation and experimental research.

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

Cited by 3 publications

References 32 publications

A Multi-strategy Enhanced Dung Beetle Optimization Algorithm and Its Application in Engineering

A Multi-strategy Enhanced Dung Beetle Optimization Algorithm and Its Application in Engineering

Cavitation Observation and Noise Characteristics in Rectangular Throttling Groove Spool

Application of the MEMS Accelerometer as the Position Sensor in Linear Electrohydraulic Drive

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