EP 0904035 A1 19990331 - ACTIVE FEEDBACK CONTROL SYSTEM FOR TRANSIENT NARROW-BAND DISTURBANCE REJECTION OVER A WIDE SPECTRAL RANGE
Title (en)
ACTIVE FEEDBACK CONTROL SYSTEM FOR TRANSIENT NARROW-BAND DISTURBANCE REJECTION OVER A WIDE SPECTRAL RANGE
Title (de)
AKTIVEN RÜCKKOPPLUNGSKONTROLLEANORDNUNG ZUR SCHMALBANDSTÖRUNGSUNTERDRÜCKUNG IN EINEM BREITEN SPEKTRALBEREICH
Title (fr)
SYSTEME ACTIF DE COMMANDE DE RETROACTION POUR REJET DES PERTURBATIONS A BANDE ETROITE TRANSITOIRE SUR UNE LARGE PLAGE SPECTRALE
Publication
Application
Priority
- US 9709527 W 19970603
- US 1916696 P 19960605
Abstract (en)
[origin: WO9746176A1] A control system provides active attenuation of excitations to a region or structure (1). A feedback sensor (14) generates a signal in response to excitations of the region (1) which is fed to a narrow-band feedback controller (5) having a frequency detector (4), a bandpass filter (6) controlled by the frequency detector (4), and a feedback control generator (8). The frequency detector (4) determines the peak frequency of the excitations. A bandpass filter (6) passes only those signals from the feedback sensor (14) in a narrow frequency band adjustably controlled by the frequency detector (4). The feedback control generator (8) receives the filtered signal from the bandpass filter (6) and produces a control output used by an actuator (13) to attenuate the excitations. Several bandpass filters (6) can be used in parallel to attenuate several frequency bands if the excitation source has a plurality of peaks. This configuration allows the bands to move across the frequency spectrum in response to the excitations.
IPC 1-7
IPC 8 full level
G10K 11/178 (2006.01)
CPC (source: EP US)
G10K 11/17853 (2017.12 - EP US); G10K 11/17854 (2017.12 - EP US); G10K 11/17875 (2017.12 - EP US); G10K 11/17879 (2017.12 - EP US); G10K 11/17883 (2017.12 - EP US); G10K 2210/121 (2013.01 - EP); G10K 2210/125 (2013.01 - EP); G10K 2210/1281 (2013.01 - EP); G10K 2210/1282 (2013.01 - EP); G10K 2210/3025 (2013.01 - EP); G10K 2210/3026 (2013.01 - EP); G10K 2210/3053 (2013.01 - EP); G10K 2210/511 (2013.01 - EP)
Designated contracting state (EPC)
BE DE DK ES FR GB IT NL PT SE
DOCDB simple family (publication)
WO 9746176 A1 19971211; CA 2247808 A1 19971211; EP 0904035 A1 19990331; EP 0904035 A4 19990929
DOCDB simple family (application)
US 9709527 W 19970603; CA 2247808 A 19970603; EP 97927930 A 19970603