Multichannel Active Sound Quality Control for Independent- Channel Sound Profiling
Regular paper
KU Leuven
Wednesday 3 june, 2015, 09:00 - 09:20
0.7 Lisbon (47)
Abstract:
Multichannel active noise control algorithms have been proposed to deal with
sound propagation
in enclosures, which base their operation on sensor/actuator positioning
restrictions that in some
applications could not be easily met. In this paper we investigate a
centralized multichannel
active sound quality control algorithm, intended to independently control each
sensor position,
regardless of the existing acoustic couplings among diverse error sensors. The
use of a
centralized strategy allows a certain control module to measure both its
effect on the desired
error sensor position, and its influence over other error sensors, which in
turn leads to a
calculation of a suitable control signal that accomplishes the desired control
targets, at a specific
targeted frequency. A coupled FE-FE vibroacoustic model of a little vehicle
mock-up is used for
computer simulations, which properly reproduces acoustic couplings among the
sensor/actuator
pairs inside the enclosure. A real disturbance obtained from an electric
vehicle is used as a
structural input force to the vibroacoustic model, and a 4x4 multichannel
algorithm is proposed
to independently sound profile the disturbance. Computer simulations
demonstrate that, despite
of the increased computational burden, as compared to decentralized control
strategies, the
proposed algorithm properly deals with the acoustic couplings among the error
sensors, thus
reaching independent control targets over the disturbance in each error
sensor, regardless of
their position in an enclosure.