Motional Feedback Control for Bass Loudspeakers

Subgroup Theory

Bachelor thesis (2018)

Authors

A. Skourtis Cabrera Electrical Engineering, Mathematics and Computer Science
A.P.T. Schipper Electrical Engineering, Mathematics and Computer Science

Contributors

G.J.M. Janssen (supervisor 1)
Faculty
Electrical Engineering, Mathematics and Computer Science
Copyright: © 2018 Alexandros Skourtis Cabrera, Aart-Peter Schipper
Motional Feedback Control Loudspeaker Non-linear model
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Published Date

03-07-2018

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

The aim of this research is to create a nonlinear model of a loudspeaker to analyze the open-loop distortion as well as the closed loop performance with linear and nonlinear controllers. A method is proposed for measuring the dominant nonlinear parameters of a loudspeakers. Furthermore, the loudspeaker distortion is both measured experimentally and simulated using the nonlinear model. The method for nonlinear system identification suffers from poor accuracy and takes into account neither the Eddy current losses, frequency dependent compliance and damping nor visco-elastic effects of the loudspeaker surround material. The simulations and measurements of distortion are not in agreement.