Motional Feedback in a Bass Loudspeaker
Analogue Implementation
Ivo van Straalen (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Vyasa Krishnasing (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Gerard Janssen – Mentor
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Abstract
This thesis is part of the Bachelor Graduation Project of Electrical Engineering at Delft University of Tech-nology. This contains the complete design process of an analogue implementation of a Motional Feedbackcontroller. Although the complete controller has been designed, no significant test results have yet beenacquired. However, theoretically the linear distortion at20H zis reduced by99.88%by the controller. Alsois predicted that the nonlinear distortion is suppressed, because of the high loop gain. The feedback signalis generated using an accelerometer. The controller mainly consists of a PI-controller and a predistortionfilter by means of a Linkwitz Transform.