Characterisation of static actuation behaviour of encapsulated PZT

Conrad J. Doran; Raymond J. Butler

doi:10.1117/12.184803

13 September 1994 Characterisation of static actuation behaviour of encapsulated PZT

Conrad J. Doran, Raymond J. Butler

Proceedings Volume 2361, Second European Conference on Smart Structures and Materials; (1994) https://doi.org/10.1117/12.184803
Event: Smart Structures and Materials: Second European Conference, 1994, Glasgow, United Kingdom

Abstract

Within the field of 'smart' structures considerable interest has been shown in the use of piezoelectric materials both as sensors and actuators. One of the best characterized of these materials is the family of Lead Zirconate Titanate (PZT) based ceramics. The use of PZT in intelligent systems has been fairly widespread, the high modulus of the material give high authority actuation, coupled with a wide operational bandwidth and relative ease of control by the application of an applied voltage. The linearity of the actuation response over a limited range has made PZT a popular choice for high precision, relatively low displacement applications. A number of attempts have been made to utilize such actuators for aerospace, using both surface mounting [1] and embedding techniques [2,3]. The effects of actuators on aeroelastic performance has also been investigated for aerospace applications [4,5]. The current practical solution to this problem appears to be the use of spatially distributed actuators [6]. One of the practical limitations of this problem are the large number of actuators required to produce the required degree of static control. In order to ensure accurate shape control, measurements must be taken to ensure there are no significant difference in the actuator element properties due to factors such as batch processing variation. In the past this has proved difficult due to the extremely brittle nature of the actuator material. More specifically the requirement for thinner elements for use in embedded applications has increased this problem. A method by which the static performance of electroceramic actuators could be quickly established would therefore be desirable. This paper presents the results of recent work to develop a test method to define the static electromechanical properties of encapsulated actuator materials in order to assess their suitability as static actuators for aerospace applications. Preliminary results using a standard PZT material are described.

Citation Download Citation

Conrad J. Doran and Raymond J. Butler "Characterisation of static actuation behaviour of encapsulated PZT", Proc. SPIE 2361, Second European Conference on Smart Structures and Materials, (13 September 1994); https://doi.org/10.1117/12.184803

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