Research of vibrations effect on hydraulic valves in military vehicles

Stosiak, Michał; Karpenko, Mykola; Prentkovskis, Olegas; Deptuła, Adam; Skačkauskas, Paulius

doi:10.1016/j.dt.2023.03.023

Cited by 28 publications

(16 citation statements)

References 21 publications

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“…Materials 2024, 17, x FOR PEER REVIEW 3 of 15 no expansion limits, so far. Recently, it has been shown that detailed studies of low-frequency vibrations can be very helpful in characterizing the performances of complex mechanical devices [19,20]. The remainder of the paper is structured as follows.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Properties and Macroscopic Defects of Metallic Bars, Pipes, and Strands through the Spectrum of Low-Frequency Excitations

Mancini,

Turchetta,

Cirillo

2024

Materials

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It is demonstrated that the application of piezoelectric sensors to metallic bars and strands can enable determining the status of the integrity of these elements through the spectrum of their acoustic excitations. The voltage output of the piezo, secured to metal bars or strands, is fed to the input of a Fast Fourier Transform analyzer, which allows displaying the spectrum of the excitations from which information on the length, overall quality of the metal, and the presence of defects can be obtained. We show that the analysis, performed on several materials and strands of different lengths, could be useful for cases in which visible inspection and/or direct access to the entire body of the metallic elements is not possible. Applications of our study for testing metallic structures embedded in concrete foundations are reported for construction sites.

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Section: Introductionmentioning

confidence: 99%

“…Our work also focuses on the general field of the application of resonances, a field that has known no expansion limits, so far. Recently, it has been shown that detailed studies of low-frequency vibrations can be very helpful in characterizing the performances of complex mechanical devices [19,20].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Properties and Macroscopic Defects of Metallic Bars, Pipes, and Strands through the Spectrum of Low-Frequency Excitations

Mancini,

Turchetta,

Cirillo

2024

Materials

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“…Cavitation and external mechanical vibrations can also contribute to the noise in mixed-flow pumps. The research conducted by Michał Stosiak et al [7] reveals that external mechanical vibrations have a significant impact on hydraulic valves in various military hydraulic drive systems. They introduced passive vibration isolation, and the reduction in pressure pulsations resulted in decreased vibration levels in the hydraulic system, lower noise emissions during operation, and a more stable operation of the hydraulic receiver.…”

Section: Introductionmentioning

confidence: 99%

Research on the Hydrodynamic Noise Characteristics of a Mixed-Flow Pump

Yang,

Li,

et al. 2023

JMSE

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This study presents a comprehensive investigation of the internal noise characteristics of a mixed-flow pump by combining computational fluid dynamics (CFD) and computational acoustics. The turbulent flow field of the pump is simulated using the unsteady SST k-ω turbulence model in CFD. The contributions of the volute, guide vanes, and impeller to the internal noise are analyzed and compared using the Lighthill theory, FW-H formula, and LMS Virtual Lab software for acoustic simulation. The research findings indicate that the energy of pressure fluctuations in the mixed-flow pump is predominantly concentrated at the blade passing frequency and its low-frequency harmonics. This suggests that the internal noise is mainly in the low-frequency range, with higher energy at the blade passing frequency and its harmonics. Under the 0.6Qdes flow condition, the flow inside the pump becomes more complex, resulting in higher sound pressure levels and sound power levels compared to higher flow conditions. However, for flow conditions ranging from 0.8Qdes to 1.2Qdes, the sound pressure levels gradually increase with increasing flow rate, with the sound pressure level at 1.0Qdes being nearly identical to that at 1.2Qdes. The analysis of sound power level spectra at different flow rates reveals that the distribution characteristics of internal vortex structures directly impact the hydrodynamic noise inside the mixed-flow pump. These research findings provide a significant theoretical basis for noise control in mixed-flow pumps.

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“…The vibration isolation system is mainly divided into passive vibration isolation systems and active vibration isolation systems (AVIS). Passive isolation is commonly achieved between the vibration source and the isolated object by introducing a material with known stiffness and damping characteristics [1,2]. Once the passive vibration isolation is designed, the vibration isolation bandwidth is predetermined, which is not easy to adjust, and the low-frequency vibration isolation performance is restricted.…”

Section: Introductionmentioning

confidence: 99%

Tracking-Differentiator-Based Position and Acceleration Feedback Control in Active Vibration Isolation with Electromagnetic Actuator

et al. 2023

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In order to improve the performance of the active vibration isolation system (AVIS) with electromagnetic actuator, several problems of vibration control are studied. Position control is a critical component in suspension systems, and the position sensor noise can extremely affect the stability of the system, so a tracking differentiator (TD) is proposed to obtain effective differential signal from relative position sensor. In vibration control, the feedback of acceleration combined with PD position feedback is presented to suppress transmission of periodic vibrations. Then, taking the acceleration transmission as the evaluation index, the acceleration transmission under the presented control method is derived, and the influence of control parameters on vibration isolation performance is discussed in detail. The vibration isolation performance is improved from 24.47 dB to 2.4 dB at resonance frequency, and −34 dB attenuation is achieved at 100 Hz with respect to vibration isolation mount system tested on the ground. The experimental results demonstrate that the performance of active vibration isolation system are improved by the proposed acceleration feedback control.

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Research of vibrations effect on hydraulic valves in military vehicles

Cited by 28 publications

References 21 publications

Analysis of Properties and Macroscopic Defects of Metallic Bars, Pipes, and Strands through the Spectrum of Low-Frequency Excitations

Analysis of Properties and Macroscopic Defects of Metallic Bars, Pipes, and Strands through the Spectrum of Low-Frequency Excitations

Research on the Hydrodynamic Noise Characteristics of a Mixed-Flow Pump

Tracking-Differentiator-Based Position and Acceleration Feedback Control in Active Vibration Isolation with Electromagnetic Actuator

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