Title:
ACTIVE NOISE CONTROLLER AND ACTIVE VIBRATION CONTROLLER
Document Type and Number:
Japanese Patent JP3674963
Kind Code:
B2
Abstract:
PURPOSE: To remarkably reduce operation amount in an active noise controller and an active vibration controller using adaptive algorithm.
CONSTITUTION: The controller 20 is constituted of a drive signal generation part 21 convoluting a reference signal x(k) and respective filter coefficients of an adaptive digital filter W(k, m), adding them at every attached character (m), generating a drive signal y(m) and outputting it, a selection part 22 selecting one reference signal x(kc) from plural K pieces of reference signals x(k) according to a selection number k, increased at every sampling timing, an updating reference signal operation part 23 operating an updating reference signal r(kc, l, m, n) based on the reference signal x(kc) selected by the selection part 22 and a transfer function filter CA(l,m) and a filter coefficient renewal part 24 updating the filter coefficient W(k, m, l, n) corresponding to selection based on the updating reference signal r(kc, l, m, n) and a residual noise signal e(l, n).
Inventors:
Yoshiharu Nakaji
Application Number:
JP22035094A
Publication Date:
July 27, 2005
Filing Date:
September 14, 1994
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F01N1/00; G05B13/02; G10K11/178; H03H21/00; (IPC1-7): G10K11/178; F01N1/00; G05B13/02; H03H21/00
Domestic Patent References:
| JP5080779A | ||||
| JP3203497A | ||||
| JP3274897A | ||||
| JP6138886A | ||||
| JP6236190A | ||||
| JP5088684A | ||||
| JP6087335A | ||||
| JP7261775A | ||||
| JP7175488A |
Attorney, Agent or Firm:
Tetsuya Mori
Yoshiaki Naito
Cui Shu Tetsu
Yoshiaki Naito
Cui Shu Tetsu