Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Characterization of 0.9PMN-0.1PT patches for active vibration control of plate host structures
Current applications in active vibration control mainly use piezoceramic actuators (PZT). With the aim of improving vibration absorption, electrostrictive actuators have been elaborated. These electrostrictive ceramics show very attractive properties for active vibration control applications. Yet, their non-linear electromechanical behavior tempers these numerous advantages and considerably complicates their use. In usual active vibration control applications, dynamic electric fields with varying magnitudes and frequencies are applied to the ceramic. Earlier measurements, performed at ONERA, showed that the ceramic behavior is strongly sensitive to operating parameters (electric field magnitude, excitation frequency, and surrounding temperature). It is demonstrated in this paper that this sensitivity can be reduced to a sensitivity of the material to its own temperature. Indeed, a significant heating of electrostrictive ceramics occurs when they are subjected to a variable electric field. This heating turns out to be, itself, dependent on operating parameters. An experimental electric model of stress-free electrostrictive patches is here presented, taking into account this thermal phenomena. This model is then used to develop constitutive relations for these materials with the view of using them as actuators in active vibration control of thin plate structures.
Characterization of 0.9PMN-0.1PT patches for active vibration control of plate host structures
Current applications in active vibration control mainly use piezoceramic actuators (PZT). With the aim of improving vibration absorption, electrostrictive actuators have been elaborated. These electrostrictive ceramics show very attractive properties for active vibration control applications. Yet, their non-linear electromechanical behavior tempers these numerous advantages and considerably complicates their use. In usual active vibration control applications, dynamic electric fields with varying magnitudes and frequencies are applied to the ceramic. Earlier measurements, performed at ONERA, showed that the ceramic behavior is strongly sensitive to operating parameters (electric field magnitude, excitation frequency, and surrounding temperature). It is demonstrated in this paper that this sensitivity can be reduced to a sensitivity of the material to its own temperature. Indeed, a significant heating of electrostrictive ceramics occurs when they are subjected to a variable electric field. This heating turns out to be, itself, dependent on operating parameters. An experimental electric model of stress-free electrostrictive patches is here presented, taking into account this thermal phenomena. This model is then used to develop constitutive relations for these materials with the view of using them as actuators in active vibration control of thin plate structures.
Characterization of 0.9PMN-0.1PT patches for active vibration control of plate host structures
Pablo, F. (Autor:in) / Petitjean, B. (Autor:in)
Journal of Intelligent Material Systems and Structures ; 11 ; 857-867
2000
11 Seiten, 20 Quellen
Aufsatz (Zeitschrift)
Englisch
Characterization of 0.9PMN-0.1 PT Patches for Active Vibration Control of Plate Host Structures
| British Library Online Contents | 2000
Synthesis and Characterization of 0.9PMN-0.1PT Powders by the Use of a Modified Columbite Precursor
| British Library Online Contents | 2005
Effect of lithium additive on the microstructure and electrical responses of 0.9PMN–0.1PT ceramics
| British Library Online Contents | 2007
| British Library Online Contents | 2005
Nanocrystalline 0.54PZN-0.36PMN-0.1PT of perovskite structure by mechanical activation
| British Library Online Contents | 2000