Global Patent Index - EP 1107225 A3

EP 1107225 A3 20030502 - Active acoustic attenuation system in which regressor filter is determined from overall system test model

Title (en)

Active acoustic attenuation system in which regressor filter is determined from overall system test model

Title (de)

Aktive Schalldämmungsanordnung, in welcher der Regressionsfilter von einem Gesamtsystem-Testmodel bestimmt wird

Title (fr)

Dispositif d'atténuation sonore actif dans lequel le filtre à régression est déterminé par un modèle de test du système global

Publication

EP 1107225 A3 20030502 (EN)

Application

EP 00310640 A 20001130

Priority

US 45221499 A 19991201

Abstract (en)

[origin: EP1107225A2] An active acoustic attenuation system uses an overall system test model Q to determine a model for the auxiliary path SE. In the preferred SISO embodiment, the system is operated in test mode to determine the C model for use as a regressor filter in the filtered-X LMS or the filtered-U RLMS algorithms. The overall system test model Q is an adaptive model which receives a system reference signal as model input and receives a combination of its model output signal and the output of an error sensor as error input. A first version of a test control model Atest(1) is selected which includes test values for control model A. During testing, the control model A does not adapt, however, the overall system test model Q does adapt. The system is operated in test mode to adaptively determine a first solution for the overall test model Q(1). Then, a second version of the test control model Atest(2) is selected, and the system is again operated in test mode to adaptively determine a second solution for the overall test model Q(2). The values Atest(1), Atest(2), Q(1), and Q(2) are then used to solve a set of linear equations to determine the auxiliary path SE. A copy of the calculated auxiliary path SE is used as the C model regressor filter. A multiple input, multiple output, multiple error (MIMO) embodiment of the invention is also disclosed. <IMAGE>

IPC 1-7

G10K 11/178

IPC 8 full level

G10K 11/178 (2006.01)

CPC (source: EP US)

G10K 11/17815 (2017.12 - EP US); G10K 11/17817 (2017.12 - EP US); G10K 11/17823 (2017.12 - EP US); G10K 11/17825 (2017.12 - EP US); G10K 11/17854 (2017.12 - EP US); G10K 11/17881 (2017.12 - EP US); G10K 11/17883 (2017.12 - EP US)

Citation (search report)

  • [A] WO 9848508 A2 19981029 - UNIV UTAH RES FOUND [US]
  • [A] EP 0814456 A2 19971229 - LORD CORP [US]
  • [A] JINWEI F ET AL: "A broadband self-tuning active noise equaliser", SIGNAL PROCESSING. EUROPEAN JOURNAL DEVOTED TO THE METHODS AND APPLICATIONS OF SIGNAL PROCESSING, ELSEVIER SCIENCE PUBLISHERS B.V. AMSTERDAM, NL, vol. 62, no. 2, 1 October 1997 (1997-10-01), pages 251 - 256, XP004100363, ISSN: 0165-1684
  • [A] KUO S M ET AL: "Analysis and design of narrowband active noise control systems", ACOUSTICS, SPEECH AND SIGNAL PROCESSING, 1998. PROCEEDINGS OF THE 1998 IEEE INTERNATIONAL CONFERENCE ON SEATTLE, WA, USA 12-15 MAY 1998, NEW YORK, NY, USA,IEEE, US, 12 May 1998 (1998-05-12), pages 3557 - 3560, XP010279574, ISBN: 0-7803-4428-6
  • [A] KUO S M ET AL: "ACTIVE NOISE CONTROL: A TUTORIAL REVIEW", PROCEEDINGS OF THE IEEE, IEEE. NEW YORK, US, vol. 87, no. 6, June 1999 (1999-06-01), pages 943 - 973, XP000912859, ISSN: 0018-9219

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

EP 1107225 A2 20010613; EP 1107225 A3 20030502; AU 7147200 A 20010607

DOCDB simple family (application)

EP 00310640 A 20001130; AU 7147200 A 20001108