James Byung Min

US Patent:

8577504, Nov 5, 2013

Filed:

Nov 24, 2010

Appl. No.:

12/954009

Inventors:

Carlos R. Morrison - North Ridgeville OH, US
Andrew J. Provenza - Avon OH, US
Benjamin B. Choi - Broadview Heights OH, US
Milind A. Bakhle - Westlake OH, US
James B Min - Broadview Heights OH, US
George L. Stefko - Westlake OH, US
John A Kussmann - Sherborn MA, US
Alan J Fougere - Falmouth MA, US

Assignee:

United States of America as Represented by the Administrator of National Aeronautics and Space Administration - Washington DC

International Classification:

G01M 1/38
G05B 13/00
G05B 15/00
G05D 23/00
F03D 11/00
F04D 27/02

US Classification:

700275, 415119, 415 27, 60 39281, 60794

Abstract:

Disclosed is a system for suppressing vibration and noise mitigation in structures such as blades in turbomachinery. The system includes flexible piezoelectric patches which are secured on or imbedded in turbomachinery blades which, in one embodiment, comprises eight (8) fan blades. The system further includes a capacitor plate coupler and a power transfer apparatus, which may both be arranged into one assembly, that respectively transfer data and power. Each of the capacitive plate coupler and power transfer apparatus is configured so that one part is attached to a fixed member while another part is attached to a rotatable member with an air gap therebetween. The system still further includes a processor that has 16 channels, eight of which serve as sensor channels, and the remaining eight, serving as actuation channels. The processor collects and analyzes the sensor signals and, in turn, outputs corrective signals for vibration/noise suppression of the turbine blades.