Power Flow Analysis of Electrostrictive Actuators Driven by Switchmode Amplifiers

Topics:
Electrical and Electronic
Tags:
Amplifier,
Analysis,
Virginia Polytechnic Institute
Source:
Virginia Polytechnic Institute and State University

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Overview: This paper presents the analysis of the power flow between stacked electrostrictor actuators and a pulse-width-modulated switching amplifier. The amplifier and actuator are analyzed as components of a smart skin whose function is underwater acoustic echo cancellation. An integrated model is developed with includes a dynamic structural model of the actuator, a dynamic model of the power electronics and a nonlinear electromechanical coupling mechanism of the electrostrictor actuation material. It is shown that an outer acoustic control loop can modify this mechanical admittance and optimize the power coupling between the actuator and an external fluid medium by impedance matching.

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Format: PDF | Size: 232KB | Date: Sep 2002 | Pages: 19

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