Reduction of the Radiating Sound of a Submerged Finite Cylindrical Shell Structure by Active Vibration Control

Kim, Heung-Soo; Sohn, Jung Woo; Jeon, Juncheol; Choi, Seung–Bok

doi:10.3390/s130202131

Cited by 22 publications

(13 citation statements)

References 26 publications

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“…Piezoelectric ceramics have excellent high-frequency response, large output torque, and high resolution, and hence are widely used in active vibration control as sensors and actuators. [3][4][5][6] Many control systems are used for active vibration control such as positive position feedback (PPF), proportional and differential (PD), velocity feedback, linear quadratic regulator (LQR) optimization, sliding mode, and pole placement methods. Wu et al 7 used velocity feedback control to suppress beam modal vibration.…”

Section: Introductionmentioning

confidence: 99%

Active vibration control of a conical shell using piezoelectric ceramics

Sun

et al. 2017

Journal of Low Frequency Noise, Vibration and Active Control

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Conical shell structures are commonly used in many engineering systems, and vibration suppression is very important to realize the desired function. In this study, piezoelectric ceramics were used as actuators/sensors with a multimodal fuzzy sliding mode controller to suppress vibrations of conical shell structure for the first time. The structure's natural frequencies and mode shapes were obtained through modal analysis using finite element method and verified by modal tests. The agreement between analysis and test results verified the finite element method was appropriate. A multimodal fuzzy sliding mode controller was subsequently designed based on the analysis to provide active vibration control. The resulting controller was tested experimentally for the conical shell structure. The experimental results indicated that the proposed controller can effectively use to suppress vibration for the conical shell structure.

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Section: Introductionmentioning

confidence: 99%

Active vibration control of a conical shell using piezoelectric ceramics

Sun

et al. 2017

Journal of Low Frequency Noise, Vibration and Active Control

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“…In 2013, Kim and Sohn applied active vibration control to a finite cylindrical shell in water, by designing an optimal control algorithm using micro-fiber composites as actuators and sensors [46]. In other work by Shen and Wen, active control of a cylindrical shell was implemented by applying different control methods, such as inverted displacement, velocity and accelerationfeedback control strategies [47].…”

Section: Motivationmentioning

confidence: 99%

Active control of cylindrical shells using the weighted sum of spatial gradients control metric

Aslani

Sommerfeldt

Blotter

2015

Journal of the Acoustical Society of America

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Active Control of Cylindrical Shells Using theWeighted Sum of Spatial Gradients (WSSG) Control Metric Pegah Aslani Department of Physics and Astronomy, BYU Doctor of Philosophy Cylindrical shells are common structures that are often used in industry, such as pipes, ducts, aircraft fuselages, rockets, submarine pressure hulls, electric motors and generators. In many applications it is desired to attenuate the sound radiated from the vibrating structure. There are both active and passive methods to achieve this purpose. However, at low frequencies passive methods are less effective and often an excessive amount of material is needed to achieve acceptable results. There have been a number of works regarding active control methods for this type of structure. In most cases a considerable number of error sensors and secondary sources are needed. However, in practice it is much preferred to have the fewest number of error sensors and control forces possible. Most methods presented have shown considerable dependence on the error sensor location. The goal of this dissertation is to develop an active noise control method that is able to attenuate the radiated sound effectively at low frequencies using only a small number of error sensors and secondary sources, and with minimal dependence on error sensor location. The Weighted Sum of Spatial Gradients control metric has been developed both theoretically and experimentally for simply supported cylindrical shells. The method has proven to be robust with respect to error sensor location. In order to quantify the performance of the control method, the radiated sound power has been chosen. In order to calculate the radiated sound power theoretically, the radiation modes have been developed for cylindrical shells. Experimentally, the radiated sound power without and with control has been measured using the ISO 3741 standard. The results show comparable, or in some cases better, performance in comparison with other known methods. Some agreement has been observed between model and experimental results. However, there are some discrepancies due to the fact that the actual cylinder does not appear to behave as an ideal simply supported cylindrical shell.

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“…In the case of shaped piezoelectric patches, the practicality can be limited by the fact that the piezoelectric design is dependent on the structure's dynamic response and the modes that need to be controlled. [8][9][10][11][12][13][14][15] Regardless of the degree of practicality, the control results obtained were generally not optimal. Here, the term optimal is used to refer to the performance that results in the maximum attenuation of the radiated sound power.…”

Section: Introductionmentioning

confidence: 99%

Active control of simply supported cylindrical shells using the weighted sum of spatial gradients control metric

Aslani

Sommerfeldt

Blotter

2018

The Journal of the Acoustical Society of America

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It is often desired to reduce sound radiated from cylindrical shells. Active structural acoustic control (ASAC) provides a means of controlling the structural vibration in a manner to efficiently reduce the radiated sound. Previous work has often required a large number of error sensors to reduce the radiated sound power, and the control performance has been sensitive to the location of error sensors. The ultimate objective is to provide global sound power reduction using a minimal number of local error measurements, while also minimizing any dependence on error sensor locations. Recently, a control metric referred to as weighted sum of spatial gradients (WSSG) was developed for ASAC. Specific features associated with WSSG make this method robust under a variety of conditions. In this work, the WSSG control metric is extended to curved structures, specifically a simply supported cylindrical shell. It is shown that global attenuation of the radiated sound power is possible using only one local error measurement. It is shown that the WSSG control metric provides a solution approximating the optimal solution of attenuating the radiated sound power, with minimal dependence on the error sensor location. Numerical and experimental results are presented to demonstrate the effectiveness of the method.

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Reduction of the Radiating Sound of a Submerged Finite Cylindrical Shell Structure by Active Vibration Control

Cited by 22 publications

References 26 publications

Active vibration control of a conical shell using piezoelectric ceramics

Active vibration control of a conical shell using piezoelectric ceramics

Active control of cylindrical shells using the weighted sum of spatial gradients control metric

Active control of simply supported cylindrical shells using the weighted sum of spatial gradients control metric

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