skip to main content

Title: Active vibration control of rotating machinery with a hybrid piezohydraulic actuator system

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 {minus}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.
Authors:
;  [1] ; ;  [2]
  1. Texas A and M Univ., College Station, TX (United States)
  2. National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
Publication Date:
OSTI Identifier:
169989
Report Number(s):
CONF-940626--
Journal ID: JETPEZ; ISSN 0742-4795; TRN: IM9605%%8
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Engineering for Gas Turbines and Power; Journal Volume: 117; Journal Issue: 4; Conference: 39. international gas turbine and aeroengine congress and exposition, The Hague (Netherlands), 13-16 Jun 1994; Other Information: PBD: Oct 1995
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; MECHANICAL VIBRATIONS; CONTROL; GAS TURBINE ENGINES; COMPUTERIZED SIMULATION; RESPONSE FUNCTIONS