Electromechanical Modeling of Hybrid Piezohydraulic Actuator System for Active Vibration Control

1997 ◽  
Vol 119 (1) ◽  
pp. 10-18 ◽  
Author(s):  
Punan Tang ◽  
Alan B. Palazzolo ◽  
Albert F. Kascak ◽  
Gerald T. Montague
Keyword(s):  
Transfer Function ◽  
Vibration Control ◽  
Piezoelectric Actuator ◽  
Closed Loop ◽  
Transfer Functions ◽  
Active Vibration Control ◽  
Space Representation ◽  
Electromechanical Modeling ◽  
Actuator System ◽  
Active Vibration

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.

Active Vibration Control of Rotating Machinery With a Hybrid Piezohydraulic Actuator System

1995 ◽  
Vol 117 (4) ◽  
pp. 767-776 ◽  
Author(s):  
P. Tang ◽  
A. B. Palazzolo ◽  
A. F. Kascak ◽  
G. T. Montague
Keyword(s):  
Vibration Control ◽  
Closed Loop ◽  
Active Vibration Control ◽  
Aircraft Engines ◽  
Test Results ◽  
State Space Methods ◽  
Low Viscosity ◽  
Actuator System ◽  
Active Vibration ◽  
Hybrid Actuator

An integrated, compact piezohydraulic actuator system for active vibration control was designed and developed with a primary application for gas turbine aircraft engines. Copper tube was chosen as the transmission line material for ease of assembly. Liquid plastic, which meets incompressibility and low-viscosity requirements, was adjusted to provide optimal actuator performance. Variants of the liquid plastic have been prepared with desired properties between −40°F and 400°F. The effectiveness of this hybrid actuator for active vibration control (AVC) was demonstrated for suppressing critical speed vibration through two critical speeds for various levels of intentionally placed imbalance. A high-accuracy closed-loop simulation, which combines both finite element and state space methods, was applied for the closed-loop unbalance response simulation with/without AVC. Good correlation between the simulation and test results was achieved.

scholarly journals Active Vibration Control of Rotating Machinery With a Hybrid Piezo-Hydraulic Actuator System

1994 ◽  
Author(s):  
Punan Tang ◽  
Alan B. Palazzolo ◽  
Albert F. Kascak ◽  
Gerald T. Montague
Keyword(s):  
Vibration Control ◽  
Closed Loop ◽  
Active Vibration Control ◽  
Aircraft Engines ◽  
Test Results ◽  
Hydraulic Actuator ◽  
Low Viscosity ◽  
Actuator System ◽  
Active Vibration ◽  
Hybrid Actuator

An integrated, compact piezo-hydraulic actuator system for active vibration was designed and developed with a primary application for gas turbine aircraft engines. Copper tube was chosen as the transmission line material for ease of assembly. Liquid plastic which meets incompressibility and low viscosity requirements was adjusted to provide optimal actuator performance. Variants of the liquid plastic have been prepared with desired properties between −40°F and 400° F. The effectiveness of this hybrid actuator for active vibration control (AVC) was demonstrated for suppressing critical speed vibration through two critical speeds for various levels of intentionally placed imbalance. A high accuracy closed loop simulation which combines both finite element and state space methods was applied for the closed loop unbalance response simulation with/without AVC. Good correlation between the simulation and test results was achieved.

scholarly journals Active vibration control of a rotor-bearing-actuator system using robust eigenvalue placement method

2020 ◽  
Vol 53 (3-4) ◽  
pp. 531-540
Author(s):  
Tao Lai ◽  
Junfeng Liu
Keyword(s):  
Vibration Control ◽  
Condition Number ◽  
Active Vibration Control ◽  
State Equation ◽  
Control Technique ◽  
Precise Position ◽  
Placement Method ◽  
Rotor Bearing ◽  
Actuator System ◽  
Active Vibration

In order to improve the vibration responses of rotor system, this paper presents an active vibration control technique for a rotor-bearing-actuator system with the use of robust eigenvalue placement method. By analyzing the characteristics of the piezoelectric stack actuator, bearing and rotor, a rotor-bearing-actuator system is modeled. Based on this dynamical model, a reduced-order technique is used to establish the state equation in the modal space. A robust eigenvalue placement method, which can enhance the robustness of system to model error and uncertain factors by optimizing the close-loop eigenmatrix with a small condition number, is proposed to carry out the active vibration control for system. The good results indicate that the eigenvalue can be placed to precise position, and the displacement responses get effectively suppressed with the proposed method. Meanwhile, the optimized close-loop eigenmatrix can possess a small condition number, which means the system has achieved excellent robustness.

A novel high-displacement piezoelectric actuator for active vibration control

1998 ◽  
Vol 7 (1) ◽  
pp. 31-42 ◽  
Author(s):  
J Garcia-Bonito ◽  
M J Brennan ◽  
S J Elliott ◽  
A David ◽  
R J Pinnington
Keyword(s):  
Vibration Control ◽  
Piezoelectric Actuator ◽  
Active Vibration Control ◽  
Active Vibration
Sign in / Sign up

Export Citation Format

Share Document