Electromechanical Modeling of Hybrid Piezohydraulic Actuator System for Active Vibration Control

[+] Author and Article Information
Punan Tang, Alan B. Palazzolo

Texas A&M University, College Station, TX 77843-3123

Albert F. Kascak, Gerald T. Montague

U.S. Army at NASA Lewis, 21000 Brookpark Road, Cleveland, OH 44135

J. Dyn. Sys., Meas., Control 119(1), 10-18 (Mar 01, 1997) (9 pages) doi:10.1115/1.2801199 History: Received September 23, 1994; Revised January 08, 1996; Online December 03, 2007


Electromechanical modeling of a hybrid piezohydraulic actuator system for active vibration control was developed. The transfer function of piezoelectric actuator was derived from the electromechanical potential energy law. This transfer function represents the dynamic relationship between input electric voltage and piezoelectric actuator displacement. The hydraulic actuator was characterized by impedance matching in which its transfer functions were experimentally determined. The transfer functions were transformed into a state-space representation, which is easily assembled into an active vibration control (AVC) closed-loop simulation. Good correlation of simulation and test was achieved for the hybrid system. A closed-loop dynamic simulation for imbalance response with/without AVC of a spinning rotor test rig at NASA Lewis was performed and showed excellent agreement with test results. The simulation couples the piezoelectric, hydraulic, and structural (rotor) components.

Copyright © 1997 by The American Society of Mechanical Engineers
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