Radiated sound control from a smart cylinder subjected to piezoelectric uncertainties based on sliding mode technique using self-adjusting boundary layer

Gohari, Hamed Darvish; Zarastvand, M.R.; Talebitooti, Roohollah; Loghmani, Ali; Omidpanah, M.

doi:10.1016/j.ast.2020.106141

Cited by 33 publications

(10 citation statements)

References 54 publications

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“…[7] Active noise control: a tutorial review. [8] Radiated sound control from a smart cylinder subjected to piezoelectric uncertainties… [9] A robust optimum controller for suppressing radiated sound from an intelligent cylinder… [10] Hybrid control technique for vibroacoustic performance analysis of a smart doubly curved sandwich structure… [11] Process of silencing sound oscillations [12] Adaptive signal processing. [13] Active noise control systems.…”

Section: Mechanicalmentioning

confidence: 99%

Narrowband active noise control in a duct using FxLMS method based on the AVR microcontroller

Tahvilian

Iranpour²,

Loghmani³

2022

Modares Mechanical Engineering

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Low-cost and highly effective noise reduction has recently become one of the substantial challenges for industrial manufacturers. This paper presents the design and construction of a cost-effective system for attenuating single-frequency annoying noise generated from industrial products and machines. To achieve this goal, narrowband active noise control using Filtered-x Least Mean Square (FxLMS) method has been used with the help of a two-factor digital adaptive filter, called the adaptive notch filter. Therefore, a duct structure has been designed, and experimental tests have been performed. To reduce implementation costs, the Arduino Uno board, which has an AVR microcontroller (ATmega328P), has been used as the controller. About 15dB noise attenuation at 400Hz and 750Hz frequencies and about 30dB noise attenuation at 650Hz and 950Hz frequencies have been achieved. Then, active noise control for two separate and simultaneous frequencies was performed, which had somewhat effective results, and in one of these frequencies, noise attenuation of about 18dB was observed.

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Section: Mechanicalmentioning

confidence: 99%

Narrowband active noise control in a duct using FxLMS method based on the AVR microcontroller

Tahvilian

Iranpour²,

Loghmani³

2022

Modares Mechanical Engineering

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“…The trajectory planning algorithms and robust control can be applied to obtain the required planar motion direction and it accuracy [22][23][24][25][26][27]. Voltage amplitude and electric signal timing can be used as input parameters of the algorithms.…”

Section: The Design and Operation Principle Of The Platformmentioning

confidence: 99%

2-DOF Small-Size Piezoelectric Locomotion Platform with the Unlimited Motion Range

2021

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This paper presents numerical and experimental investigations of a small size piezoelectric locomotion platform that provides unlimited planar motion. The platform consists of three piezoelectric bimorph plates attached to the equilateral triangle-shaped structure by an angle of 60 degrees. Alumina spheres are glued at the bottom of each plate and are used as a contacting element. The planar motion of the platform is generated via excitation of the first bending mode of the corresponding plate using a single harmonic signal while the remaining plates operate as passive supports. The direction of the platform motion controlled by switching electric signal between piezoelectric plates. A numerical investigation of the 2-DOF platform was performed, and it was found out that the operation frequency of the bimorph plates is 23.67 kHz, while harmonic response analysis showed that the maximum displacement amplitude of the contact point reached 563.6 µm in the vertical direction while an excitation signal of 210 Vp-p is applied. Prototype of the 2-DOF piezoelectric platform was made, and an experimental study was performed. The maximum linear velocity of 44.45 mm/s was obtained when preload force and voltage of 0.546 N and 210 Vp-p were applied, respectively.

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“…However, the imposed wheel-rail force did not take into account the wheel non-circularity. Meanwhile, in order to deeply analyze the transmission characteristics of wheel noise, inspirations from the acoustic characteristics of shell structure, 13,14 cylinder structure, 15 and plate structure 16 can be used for references.…”

Section: Introductionmentioning

confidence: 99%

Influences of wheel polygon amplitude on wheel-rail vibration and sound radiation

Song

Wang

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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Wheel polygon amplitude can greatly affect wheel-rail vibration and sound radiation. Based on multi-body dynamics theory, a vehicle-track rigid-flexible coupling dynamics model was established. According to the actual running wear condition of the wheel, the wheel-rail vibration response was calculated and analyzed (the order of wheel polygons is 20, and the polygon amplitude is 0.01/0.02/0.03/0.04 mm, respectively). Together with the finite element/boundary model of the wheel, the calculated wheel-rail force was used as an external incentive to analyze the effects of polygon amplitude on the time-frequency domain of wheel noise. The research results show that: when the polygon order is 20, with the increase of polygon amplitude, the wheel-rail vertical force and the acceleration of wheel, rail and track slab increase gradually. It’s also found that the rail acceleration is obviously more sensitive to the amplitude than the track slab acceleration, while the vertical displacement of the rail and track slab is less sensitive to the polygon amplitude. At the same amplitude, the closer to the wheel rolling line, the more obvious the sound pressure decreases with the increase of height. At different amplitudes, the sound pressure at different positions will increase with the rise of the polygon amplitude. The root mean square value of sound power increases gradually with the addition of amplitude: When the amplitude changes from 0.01 mm to 0.04 mm, the calculated sound power increases by 4.1 dB.

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Radiated sound control from a smart cylinder subjected to piezoelectric uncertainties based on sliding mode technique using self-adjusting boundary layer

Cited by 33 publications

References 54 publications

Narrowband active noise control in a duct using FxLMS method based on the AVR microcontroller

Narrowband active noise control in a duct using FxLMS method based on the AVR microcontroller

2-DOF Small-Size Piezoelectric Locomotion Platform with the Unlimited Motion Range

Influences of wheel polygon amplitude on wheel-rail vibration and sound radiation

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