Semi-passive control strategy using piezoceramic patches in non linear commutation architecture for structural-acoustic smart systems

The Thesis consists of two parts. The first is an overview of the state of art in the field of interest: piezoelectrics smart materials for strucutural applications, piezo modelling and shunt circuits architectures and their applications. The second part includes papers accepted and submitted to international peer reviewed journals, the abstract of papers presented at international conferences proceedings as well, and the complemetary ongoing activities, focusing on our investigation and our appproach to model and simulate the semi-passive non linear commutation control for structural-acoustic smart systems. In the included papers the following original aspects have been dealt: International Peer Reviewed Journals A multi degrees of freedom electro-mechanical coupled system has been numerically modelled by means of a finite element formulation [1.J]. 1.J M. Ciminello, S. Ameduri, A. Concilio, “FE Modelling of an Innovative Vibration Control Shunt Technique”. Journal of Intelligent Material Systems and Structures Vol.19, N°8, August 2008 pp.875-887. 2.J M. Ciminello, S. Ameduri, A. Calabrò, A. Concilio, “Synchronised Switched Shunt Control Technique Applied on a Cantilevered Beam: Numerical and Experimental Investigations”. Journal of Intelligent Material Systems and Structures Vol.19, N°9, September 2008 pp.1089-1100. 3.J M. Ciminello, L. Lecce, S. Ameduri, A. Calabrò, A. Concilio, “Switched Shunt Control implemented through a PZT network embedded within a composite panel: design, manufacture and test”. Accepted for publication to – Journal of Intelligent Material Systems and Structures JIM-09-188. 4.J W. Larbi, J.-F. Deu, M. Ciminello, R. Ohayon, “Structural-acoustic vibration reduction using switched shunt piezoelectric patches. A finite element analysis”. Submitted revised version to the - Journal of Vibration and Acoustics VIB-09-1143. 5.J M. Ciminello, L. Lecce, A. Concilio, “Structure borne sound for acoustic cavity through pzt patch in switched shunt configuration: a non standard finite element analysis”. Submitted to: Aerotecnica missili e spazio. An attempt to face with a semi analytic solution exclusively for a simple 1D test case of a fluid duct, has also been taken into account [6.J]. 6. J S. Ameduri, M. Ciminello, “Fourier Expansion Solution for a Switched Shunt Control Applied to a Duct”. Accepted for publication to : Journal of Theoretical and Applied Mechanics (JTAM), No. 2 or No. 4, Vol. 48, 2010