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Proceedings Paper

Power flow and amplifier design for piezoelectric actuators in intelligent structures
Author(s): David J. Warkentin; Edward F. Crawley
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Paper Abstract

In developing intelligent structures in which actuation, sensing, and processing elements are physically integrated within the structure, the use of piezoelectric actuators places certain requirements on the electronic components which drive them. Applications may impose strict limitations on power consumption and heat dissipation, and structural integration brings an added requirement for component miniaturization. An understanding of the power flow behavior of piezoelectric actuators in controlled structure applications is therefore important. This paper addresses power issues in the application of piezoelectric actuators and embedded electronic components. The power flow characteristics of piezoelectric actuators are examined in closed-loop control applications. An analysis is presented of the power flow and voltage and current requirements of a piezoelectric actuator in a simple system, along with implications for the design of linear amplifiers. The contributions of various elements to average and peak power flow levels are identified, as is the effect of loop closure on the impedance which the actuator presents to the amplifier.

Paper Details

Date Published: 6 May 1994
PDF: 12 pages
Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994); doi: 10.1117/12.175190
Show Author Affiliations
David J. Warkentin, Massachusetts Institute of Technology (United States)
Edward F. Crawley, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 2190:
Smart Structures and Materials 1994: Smart Structures and Intelligent Systems
Nesbitt W. Hagood, Editor(s)

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