Some physical insights for active control of sound radiated from a clamped ribbed plate

Ma, Xiyue; Chen, Kean; Ding, Shaohu; Zhang, Bingrui

doi:10.1016/j.apacoust.2015.04.020

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…For the rib stiffened plate used in practice, in order to further explore the physical nature of the active control of vibration and sound radiation of ribbed structure, Ma et al [16] investigated the mechanism of active control of sound radiation from the single ribbed plate using the single point force as the control source. Then, for further exploration of the physical nature of active control in complex double panel case, Ma et al [17] presented an analytical investigation on actively controlling sound transmission through single rib stiffened double-panel system using the cavity control approach.…”

Section: Introductionmentioning

confidence: 99%

“…The vertical rib locates at x = x a and the horizontal rib locates at y = y a . A controllable point force [16] f s (r s , t) = F s δ(x − x s , y − y s )e jωt is added on the ribbed plate to control the vibration and noise radiation of the ribbed plate. When the decentralized control system with S feedback loops is used, the control force can be expressed as…”

Section: Introductionmentioning

confidence: 99%

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Active Vibration Control of Rib Stiffened Plate by Using Decentralized Velocity Feedback Controllers with Inertial Actuators

Wang

2019

Applied Sciences

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Featured Application: The results and conclusions obtained from this research can offer guides for a practical design of the decentralized feedback controllers with inertial actuators to actively controlling the vibration and noise radiation of the rib stiffened plate.Abstract: Active control of low frequency vibration and sound radiation from a rib stiffened plate has great practical significance as this structure is widely applied in engineering, such as aircraft or ship fuselage shells. This paper presents an investigation on the performance of active vibration control of the rib stiffened plate by using decentralized velocity feedback controllers with inertial actuators. A simple modeling approach in frequency domain is proposed in this research to calculate the control performance. The theoretical model of vibrating response of the ribbed plate and the velocity feedback controllers is first established. Then, as an important part, the influences of the control gain and the number of the decentralized unit on the control performance are investigated. Results obtained demonstrate that-similar to that of the unribbed plate case-appropriately choosing the number of the unit and their feedback gains can achieve good control results. Too many units or very high feedback gains will not bring further noise reduction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active Vibration Control of Rib Stiffened Plate by Using Decentralized Velocity Feedback Controllers with Inertial Actuators

Wang

2019

Applied Sciences

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“…[8].Compared with the unribbed double-panel system [4][5][6][19][20][21], the physical mechanism of active control of noise transmission presents additional prominent differences for the single ribbed case. Due to the remarkable free vibration characteristic for the ribbed plate (the modes, which have the same modal index along the rib direction, can couple with each other [18]), the differences present as the following two aspects [8]. One of them involves suppressing the mechanism.…”

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confidence: 99%

Active Control of Sound Transmission through Orthogonally Rib Stiffened Double-Panel Structure: Mechanism Analysis

Chen

2019

Applied Sciences

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Featured Application: Active double-panel sound insulation structure can be applied as potential noise control technic in aviation and navigation to actively control the low frequency sound transmission into the cabin.Abstract: Physical mechanisms of active control of sound transmission through orthogonally two ribs stiffened double-panel structure are investigated. This is the continued work of the single rib stiffened case. For the orthogonally two ribs stiffened case, four different cluster mode groups can be coupled with each other, due to the interlaced coupling effects of the horizontal and vertical ribs. One cavity mode can couple with and transmit sound energy to any type of base plate mode of the radiating ribbed plate. Consequently, the main differences of the control mechanism, when compared with the single ribbed case, lie in two aspects. One is that a novel mechanism appears. That is, suppressing and rearranging the cavity modes simultaneously achieves the suppression of the base plate modes. The other is that rearrangement of the cavity modes to rearrange the base plate modes for achieving sound radiation cancellation almost does not appear. The reason is that all types of cavity mode can couple with any one of the base plate modes due to the coupling effects of the two ribs. There is only a need to rearrange several important cavity modes to achieve suppressing the base plate mode of the radiating ribbed plate. Appl. Sci. 2019, 9, 3286 2 of 17 pay close attention to distinctly explore the elementary physical nature of active control. However, the double-layer cabin walls are usually the classical orthogonally n-ribbed plate. In order to improve the engineering relevance of the analytical research, this study further presents a more practical structure which refers to the orthogonally two ribs stiffened double-panel system. Hence, this research is continued from the work in Ref. [8]. The aim of this paper is to further explore the active control mechanisms of such a structure, which may support engineering application of this technique in the future. The orthogonal ribbed case is only concerned with one horizontal and one vertical rib. Although such a structure is not in accord with the engineering applications, it seems to be more practical. The purpose of this is to simplify the investigation. Understanding the physical nature of active control in orthogonal ribbed cases may provide better understanding of complicated mechanisms involved in an orthogonal n-ribbed case [9].Many techniques [10][11][12][13][14][15] have been proposed to accurately predict free vibration of the ribbed plate. Some other techniques [2,16] have been also applied to model complicated double-panel structures composed of rib stiffened plates. These contributions deepen the comprehending of the vibration characteristics of the rib stiffened plate and rule of sound energy transmission through these structures, which offers assistance for noise and vibration control engineering. One new modeling approach proposed recently i...

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Active control of sound radiation from rib stiffened plate using the weighted sum of spatial gradients as the cost function

Chen

2020

Applied Acoustics

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Some physical insights for active control of sound radiated from a clamped ribbed plate

Cited by 6 publications

References 19 publications

Active Vibration Control of Rib Stiffened Plate by Using Decentralized Velocity Feedback Controllers with Inertial Actuators

Active Vibration Control of Rib Stiffened Plate by Using Decentralized Velocity Feedback Controllers with Inertial Actuators

Active Control of Sound Transmission through Orthogonally Rib Stiffened Double-Panel Structure: Mechanism Analysis

Active control of sound radiation from rib stiffened plate using the weighted sum of spatial gradients as the cost function

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