Active Structural Acoustic Control With Smart Structures

Fuller, Chris R.; Rogers, Craig A.; Robertshaw, Harry H.

doi:10.1117/12.963110

Cited by 19 publications

(13 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A wide variety of distributed sensors have been developed. Important among these sensors are those utilizing optical fibers (Murphy et al 1991), piezo-electric films (Lee 1987, Lee et al 1991 and Shape Memory Alloy (SMA) or constantan wires (Fuller et al 1989, Wilson et al 1990, Salazano 1994 which are embedded in the composite matrix of the flexible structures. The optical-fiber sensors are the most popular used distributed sensors, because they are extremely small and light weight, compatible with the composites and have very wide bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Health monitoring using distributed sensing of structural power flow

Akl

Baz

2004

Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems

View full text Add to dashboard Cite

Health monitoring of defective flat plates is achieved through the use of a distributed network of sensors that can map the deflection profile of these plates. The mapped deflection profiles are then used to extract the structural power flow as an effective criterion for identifying the exact location of the defects. In this paper, emphasis is placed on developing the theoretical equations governing monitoring the deflection and localizing the defects using the theory of finite elements. The predictions of the developed theoretical models are validated experimentally using a scanning laser vibrometer as means for monitoring the structural power flow over defective plates. The accuracy and effectiveness of the power flow maps in localizing the defects are demonstrated and compared with conventional modal parameter identification methods that fail to identify small defects. The presented concepts can be easily employed in health monitoring of more complex and critical structures such as aircraft fuselages and bridges where small defects can be detrimental to their safe operation and their locations can not be easily identified by conventional modal identification methods.

show abstract

Section: Introductionmentioning

confidence: 99%

Health monitoring using distributed sensing of structural power flow

Akl

Baz

2004

Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems

View full text Add to dashboard Cite

show abstract

“…The¯rst experiments that illustrated the feasibility of active acoustic control using the SMA composites were published by Fuller et al, 16 Saunders et al 17 and Rogers. 18 The analytical approach was formulated and results generated.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Free Vibration of Hybrid Composite Moving Beams Embedded with Shape Memory Alloy Fibers

Ebrahimi

Moeinfar

Shakeri

2016

Int. J. Str. Stab. Dyn.

View full text Add to dashboard Cite

The aim of this paper is to investigate the free vibration of hybrid composite moving beams embedded with shape memory alloy (SMA)¯bers. The nonlinear equations of motion are derived based on the Euler-Bernoulli beam theory in conjunction with the von Karman type of nonlinearity in strain-displacement relations via the extended Hamilton principle. Also, the recovery stress induced by the SMA¯bers is computed by applying the one-dimensional Brinson model and Reuss scheme. Then, an analytical approach in used to solve the nonlinear equation of motion for the simply supported shape memory alloy hybrid composite (SMAHC) moving beams. Based on the analytical solution, several parametric studies are presented to show the e®ects of various parameters such as volume fraction, pre-strain in the SMA¯bers, temperature rise and velocity on the fundamental frequency of the SMAHC moving beams. Due to the lack of similar results in the specialized literature on the subject of interest, this paper is likely to¯ll a gap in the state of the art of the related research.

show abstract

“…IN recent times, there has been a substantial amount of interest generated in the use of piezoelectric actuators for structural vibration and acoustic control (Bailey and Hubbard Jr., 1985; Crawley and de Luis, 1987; Burke and Hubbard Jr., 1988;Baz and Poh, 1988;Fuller et al, 1989; Liang and Hansen, 1989 and; Hansen and Pan, 1990;Wang et al, 1990;Liao and Sung, 1991;Rogers et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Further Studies of the Dynamic Response of a Simply Supported Beam Excited by a Pair of Out-of-Phase Piezoelectric Actuators

Rivory

Hansen

1994

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

The response of a simply supported beam excited by a pair of out-of-phase piezoelectric actuators perfectly bonded to the beam surface, is modelled analytically and measured experimentally. The analytical model follows the approach of Pan et al. (1992) and corrects errors in that work. Other analytical models are reviewed and it is shown that two equivalent force transfer mechanisms, either two counteracting uniform surface strain distributions or two counteracting uniform moment distributions, can be used in the models to describe the beam response at resonance, for in this condition, the free edge condition of the piezoelectric actuator does not affect the strain field. The analysis shows that this current model agrees with other modelling approaches, but experiments show that away from resonance, significant differences in the beam response are found due to the influence of the free edge condition of the piezoelectric actuator. However, none of the previously published papers nor the model discussed in this paper account for the force transfer mechanism due to the free edge of the piezoelectric actuator. The modelling technique postulated in this paper however will readily lend itself to be used when a more accurate extensional strain model is available.

show abstract

Active Structural Acoustic Control With Smart Structures

Cited by 19 publications

References 8 publications

Health monitoring using distributed sensing of structural power flow

Health monitoring using distributed sensing of structural power flow

Nonlinear Free Vibration of Hybrid Composite Moving Beams Embedded with Shape Memory Alloy Fibers

Further Studies of the Dynamic Response of a Simply Supported Beam Excited by a Pair of Out-of-Phase Piezoelectric Actuators

Contact Info

Product

Resources

About