Electromechanical Modeling of Hybrid Piezohydraulic Actuator System for Active Vibration Control

Abstract

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.

Design of a vibration-free platform: Stabilization of a beam mounted on bicycle model of a car

“…Burke et al 2 studied vibration control of a simply supported beam, and to this end they considered the application of a spatially shaped distributed actuator. Tang et al 3 studied the model of a hybrid piezo-hydraulic actuator.…”

A Method to Transit the Rotor-to-Stator Rubbing to Normal Motion Using the Phase Characteristic

“…2 ) in (10) are set as (6,8,6,8) to guarantee that the eigenvalues are with negative real parts and that the trajectory reaches the desired status.…”

“…For rotor speed, = 2.1, the response of rotor is a partial rub with backward whirl as shown in Figure 3. The desired controlled position and the values ( 1 , 1 , 2 , 2 ) in (9) are set as (1.1, 0, − 3.07, ) and (6,8,6,8). The control input is activated at = 20, and after a short transition the rotor reaches the desired position (1.1, 0, − 3.07, ).…”

“…For controlling the rotor-to-stator rubbing, many works investigated control forces acting directly on the rotor to minimize rotor vibration, for example, [7][8][9][10][11][12]. A control strategy using an active auxiliary bearing was proposed, in which actuation was on the auxiliary bearing and thereby indirectly on the rotor.…”

Compact hybrid electrohydraulic actuators using smart materials: A review

“…A dynamic model to find the induced strain of a stacked actuator shown in Figure 17 was developed by Tang et al (1997). The model started by considering the total energy per unit volume as follows: where V v =(1/2)r T S E r is the mechanical energy density,…”