Active Noise Control Studies Using the Rayleigh-Ritz Method

Gopinathan, Senthil V.; Varadan, Vasundara V.; Varadan, Vijay K.

doi:10.1007/978-94-010-0724-5_22

Cited by 5 publications

(2 citation statements)

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“…These vibrations partly result in damage of the structures or at least reduce their life time cycles due to permanent heavy loads. For many other cases, the vibrations of technical equipment result in emission of sound which is often disturbing the environment and has to be reduced (Exler, 2002;Gopinathan, Varadan, Varadan, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that the numerical modeling of smart structures is an emerging field considered by several other scientific groups around the world (Berger et aL, 2000;Gopinathan, Varadan, Varadan, 2000;Irschik, Krommer, 2000;Irschik, Pichler, 2002;Liu, Cai, 2002;Schlacher, Kugi, 2002;Shibuja, Watanabe, 2002;Sunar, 2002). • nearly all types of magnetomechanical transducers,…”

Section: Introductionmentioning

confidence: 99%

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Modeling of smart devices

Lerch

Landes

2004

Elektrotech. Inftech.

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The precise numerical modeling of electromechanical smart structures and devices is reported. This modeling is performed on the basis of finite and boundary element procedures solving coupled field problems arising in transducer technology. Furthermore, the controler is embedded within the simulation process. Therewith, the numerical computation of the closed loop starting with the sensor and ending with the actuator is performed. Results are shown for an electrostatic excited plate as well as an electromagnetic excited tube, which are both actively damped by controlled piezoelectric actuators. Keywords

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of smart devices

Lerch

Landes

2004

Elektrotech. Inftech.

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Adaptive sensing of kinematic entities in the vicinity of a time-dependent geometrically nonlinear pre-deformed state

Krommer

Vetyukov

2009

International Journal of Solids and Structures

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a b s t r a c tA continuously distributed strain-type sensor can be designed to produce a signal proportional to a desired kinematic entity in the geometrically linear range. The corresponding spatial distribution of the sensor is found as a solution to an auxiliary problem of statics. For a geometrically nonlinear setting we suggest a new general method to design continuous strain-type sensors for measurements in the vicinity of a known pre-deformed state. This method is formulated for a general three-dimensional continuum, and a numerical implementation for rod structures is presented. The efficiency is first demonstrated for a nonlinear static deformation of a spatial rod structure; the modern approach to numerical modeling of rods with no shear deformation is utilized. Another example of in-plane vibrations of a rod demonstrates the benefit of the adaptive recomputation of the sensor distribution accounting for the actual time-dependent pre-deformation.

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