Identification and compensation of the electrodynamic transducer nonlinearities

Author

Schurer, Hans ; Nijmeijer, Alex G J ; Boer, Mark A. ; Slump, Cornelis H. ; Herrmann, O.E.

Author_Institution

Dept. of Electr. Eng., Twente Univ., Enschede, Netherlands

Volume

3

fYear

1997

fDate

21-24 Apr 1997

Firstpage

2381

Abstract

Based on a simplified nonlinear lumped element model of the electrodynamic loudspeaker in either a closed or a vented cabinet, a new nonlinear controller is derived, simulated and implemented on a DSP. The Volterra series expansion, a well known functional expansion to model nonlinear systems, is used to estimate the nonlinear parameters from distortion measurements. The controller is directly based on the nonlinear differential equation, and is tested for the case of a low frequency electrodynamic loudspeaker in a closed cabinet. Digital implementation is realized on a general purpose TMS320C30 DSP development board, using the automatic code generation from schematic entry of the Alta-Group SPW software

Keywords

Volterra series; automatic programming; controllers; digital signal processing chips; electrodynamics; loudspeakers; lumped parameter networks; nonlinear control systems; nonlinear differential equations; nonlinear network analysis; parameter estimation; Alta-Group SPW software; DSP; Volterra series expansion; automatic code generation; closed cabinet; digital implementation; distortion measurements; electrodynamic loudspeaker; electrodynamic transducer nonlinearities; functional expansion; general purpose TMS320C30 DSP development board; low frequency electrodynamic loudspeaker; nonlinear controller; nonlinear differential equation; nonlinear lumped element model; nonlinear parameter estimation; nonlinear systems; nonlinearities compensation; nonlinearities identification; schematic entry; vented cabinet; Differential equations; Digital signal processing; Distortion measurement; Electrodynamics; Frequency; Loudspeakers; Nonlinear systems; Parameter estimation; Testing; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on

Conference_Location

Munich

ISSN

1520-6149

Print_ISBN

0-8186-7919-0

Type

conf

DOI

10.1109/ICASSP.1997.599533

Filename

599533