Browsing by Subject "piezoelektryki"

Now showing 1 - 4 of 4

Access status: Open Access ,
Modeling and simulation of piezoelectric elements - comparison of available methods and tools
(Wydawnictwa AGH, 2008) Staworko, Michał; Uhl, Tadeusz
The paper presents an overview of modeling techniques of piezoelectric elements and a comparison of a software for simulation mechanical and electro-mechanical systems with a piezoelectric transducer. The described models are applied to simulate a two degrees-of-freedom mechanical system with passive damping, a two-layer and multi-layer piezoelectric bimorph. The results of simulations preformed by the use of the presented software packages are being discussed.
Access status: Restricted ,
Projekt chwytaka z czujnikami piezoelektrycznymi
(Data obrony: 2021-01-27) Kozyra, Konrad
Wydział Inżynierii Mechanicznej i Robotyki
Access status: Open Access ,
Sound insulation analysis of plates with piezoceramic elements
(Wydawnictwa AGH, 2007) Kozupa, Michał; Batko, Wojciech; Pietrzko, Stanisław
This paper represents general idea research to the possibilities of increasing sound insulation of plates by active control it's vibration through piezoceramic elements placed on the plane. In the preliminary research a rectangular plate 455x560 mm made of steal was analyzed. Sound insulation measurement was executed on a specialized enclosure in reverberation chamber. A PZT piezoceramic was proposed to control vibration of the plate.
Access status: Open Access ,
The use of piezoelectric elements to control vibrations of ax SMA material shaft
(Wydawnictwa AGH, 2007) Gałkowski, Zdzisław
In the paper an analysis of the influence of structural friction and piezoelectric elements on damping of torsional vibration in a shaft is presented. The structural friction between the piezoelectric actuators and the shaft is taken into account. It is assumed that the shaft is made of SMA material. A dependency describing the equivalent Kirchhoff modulus and the equivalent viscotic damping coefficient is introduced for the assumed material. For the purpose of the analysis a mathematical model of a permanent shaft-sleeve joint is formulated. The obtained differential equations of motion are solved using the asymptotic Bogoliubov-Krylov-Mitropolsky method via developing relations for derivatives of amplitude and phase. The obtained equations are solved for the case of harmonic excitation with uniformly increasing frequency of the driving torque and the effect of the gain factor magnitude on the damping level is examined. On the grounds of numerical simulations the growth of damping efficiency in the joint as a function of the gain factor is confirmed.