Volume 15, Issue 4 (2015)                   Modares Mechanical Engineering 2015, 15(4): 1-12 | Back to browse issues page

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Keshavarzpour H, Hasheminejad S M. Multi-objective robust active acoustic radiation control of a piezocomposite arbitrary thick rectangular panel. Modares Mechanical Engineering. 2015; 15 (4) :1-12
URL: http://journals.modares.ac.ir/article-15-3573-en.html
1- Iran University of Science and Technology
Abstract:   (3092 Views)
Active structural acoustic radiation control of a piezolaminated arbitrary thick rectangular plate with a mixed-norm H_2/H_∞ robust controller is developed. The structure is made of a transversely isotropic host layer with a distributed piezoelectric sensor layer as well as a matched piezoelectric actuator layer, facing high frequency uncertainties and random external disturbances. The elasto-acoustic formulation, based on the exact linear 3D piezo-elasticity theory, is developed for problem of fully coupled structure and acoustic mediums. Identification of the fluid/structure interaction system with subspace algorithm is implemented on actuator/sensor data sets. A multi-objective controller with regional pole placement, formulated in LMI framework, is synthesized while unmodeled dynamics are treated as multiplicative uncertainties. Numerical simulations confirm effectiveness of the implemented multi-objective robust active control scheme for reduction of radiated acoustic power from a piezocomposite plate, without stimulating any instability. Also, better tracking performance and disturbance rejection of mixed-norm controller is observed in comparison to that of H_2 and H_∞ controllers. Finally, validity of the elasto-acoustic model is proved by results obtained from a finite element software, as well as with the data available in the literature.
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Article Type: Research Article | Subject: Vibration
Received: 2014/12/18 | Accepted: 2015/01/25 | Published: 2015/02/17

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