&lt;title&gt;Sound and vibration control tests of composite panel using piezoelectric sensors and actuators&lt;/title&gt;

Takahashi, Kosaku; Bansaku, Kazuhiro; Sanda, Tomio; Matsuzaki, Yuji

doi:10.1117/12.436574

Cited by 5 publications

(4 citation statements)

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“…This idea inspired many studies using PZT on an elemental level like a plate. Two years ago, we studied the radiated sound power reduction capability of PZT in low frequency ranges with 600 mm × 600 mm × 2.0 mm CFRP board [1]. Recently, there have been many studies on internal noise reduction, utilizing a model that simulates aircraft body structures [2].…”

Section: Introductionmentioning

confidence: 99%

Noise and vibration reduction technology in aircraft cabins

Takahashi¹,

Monzen²,

Yamaoka³

et al. 2004

Advanced Composite Materials

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This study investigates how to reduce noise and vibration in aircraft cabins with Pb(TiZr)O 3 (PZT), using a semi-monocoque structure 1.5 m in diameter and 3.0 m long with a 2.3 mm skin, which simulates an aircraft body. We utilized 480 pieces of PZT bonded on the inner surface of the structure as sensors and actuators. We applied random noise in the low frequency range from 0 to 500 Hz to the test model. By controlling the PZTs, we tried to reduce the vibration level of the structure and the internal air due to the external load.Two control methods, gain control and feed-forward control, were tried. We measured internal sound pressure at 150 points and compared the overall values of sound pressure with gain control to those without control and evaluated the reduction capabilities. The tests demonstrated a maximum 4.0 dB O.A. reduction with gain control and a maximum 3.5 dB O.A. reduction with feed-forward control.

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Section: Introductionmentioning

confidence: 99%

Noise and vibration reduction technology in aircraft cabins

Takahashi¹,

Monzen²,

Yamaoka³

et al. 2004

Advanced Composite Materials

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“…N OISE and vibration suppression of a structuralacoustic system is one of the important technologies for comfort in every day life. Since the last decade, particularly, interior noise reduction in a chamber or an enclosure has attracted many investigators, for instance, Sampath and Balachandran (1997), Kim and Brennan (2000), Takahashi et al (2001), Franzoni and Elliott (2003), etc.…”

Section: Introductionmentioning

confidence: 99%

Active Suppression of Plate Vibration Excited by Acoustic Pressure in a Chamber: Cluster-mode Approach

Kato

Matsuzaki

2007

Journal of Intelligent Material Systems and Structures

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A cluster-mode control analysis of coupled structural and acoustic vibrations of a double-wall chamber system, which consists of four solid walls and elastic outer and inner plates placed opposite, as well as air occupying the chamber is presented in this article. The outer plate is externally driven to induce acoustic vibrations in the chamber, which consequently force the inner plate to oscillate. To understand complicated mechanical coupling of the structural and acoustic vibrations, the cluster-mode approach of filtering, sensing, and actuating is used. The coupled vibrations of the system are analytically grouped into four clusters in such a way that each clustered mode can be treated independently. As one may have a simpler view on the coupling in each cluster, it is easier to overview the coupled behaviors and control the oscillation of the system effectively. In numerical analysis, a feedforward control to the inner plate and a direct velocity feedback control (DVFBC) to the outer plate are applied. Numerical results show that the introduction of the cluster-mode filtering is useful in comprehending the complicated mechanical behavior of the coupled system. The hybrid use of optimum clustered feedforward control and clustered DVFBC has well suppressed the vibration of the internal plate.

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“…In terms of active panels for vibration suppression, various researchers have worked on embedded or surface mounted sensors and actuators for composite and metallic plates, beams, and shells (Ogden and Grandhi, 1996;Carpenter, 1997;Chandrashekhara and Varadarajan, 1997;Yang and Jeng, 1997;Etienne-Cummings et al, 1998;Lee et al, 1998;Proulx et al, 1998;Suleman et al, 1999;Yoshikawa et al, 1999;Ameduri et al, 2001;Ashour and Nayfeh, 2001;Bevan and Mei, 2001;Costa et al, 2001;Inman et al, 2001;Khot et al, 2001;Kim et al, 2001;Kudva et al, 2001;Librescu and Na, 2001;Philen and Wang, 2001;Takahashi et al, 2001;Wang et al, 2001). Researchers have shown that it is possible to tailor the shape/location of the actuator to either excite or suppress particular modes or optimize the shape/ location/drive-circuit of smart structures and their actuators leading to improved control behavior (Wohlers et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Manufacturing and Testing of Active Composite Panels with Embedded Piezoelectric Sensors and Actuators

Ghasemi‐Nejhad

Russ

Pourjalali

2005

Journal of Intelligent Material Systems and Structures

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This work presents the manufacturing and testing of active composite panels (ACPs) with embedded piezoelectric sensors and actuators. The composite material employed here is a plain weave carbon/epoxy prepreg fabric with 0.30 mm ply thickness. A cross-ply type stacking sequence is employed for the ACPs. The piezoelectric flexible patches employed here are Active Fiber Composite (AFC) piezoceramics with 0.33 mm thickness. Composite layers with openings are used to fill the space around the embedded piezo patches to minimize the problems associated with ply drops in composites. The AFC piezoceramic patches were embedded inside the composite laminate. High-temperature wires were soldered to the piezo leads, insulated from the carbon substructure by high-temperature materials, and were taken out of the composite laminates employing cutout hole, molded-in hole, and embedding techniques. The laminated ACPs with their embedded piezoelectric sensors and actuators were vacuum bagged and co-cured inside an autoclave employing the cure cycle recommended by the composite material supplier. The Curie temperature of the embedded piezo patches should be well above the curing temperature of the composite materials as was the case here. The capacitance of the piezoelectric patches was measured before and after cure for quality control. The manufactured ACPs were trimmed and then tested for their functionality. A finite element analysis (FEA) model was developed to verify the free expansion of the AFC FEA. Next, the FEA model of the manufactured ACP was developed based on the AFC FEA free expansion model and was employed to test the functionality of the AFCs embedded within the ACPs. Both static and dynamic FEA results of the modeled ACPs showed very good agreements with their corresponding experimental results. Finally, vibration suppression as well as simultaneous vibration suppression and precision positioning tests, using Hybrid Adaptive Control (HAC), were successfully conducted on the manufactured ACP beams and their functionality was further demonstrated. The advantages and disadvantages of ACPs with embedded piezoelectric sensor and actuator patches manufactured employing the abovementioned three wires out techniques are also presented in terms of manufacturing and performance.

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<title>Sound and vibration control tests of composite panel using piezoelectric sensors and actuators</title>

Cited by 5 publications

References 0 publications

Noise and vibration reduction technology in aircraft cabins

Noise and vibration reduction technology in aircraft cabins

Active Suppression of Plate Vibration Excited by Acoustic Pressure in a Chamber: Cluster-mode Approach

Manufacturing and Testing of Active Composite Panels with Embedded Piezoelectric Sensors and Actuators

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