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Proceedings Paper

Disturbance-observer-based active control of engine-induced vibrations in automotive vehicles
Author(s): Christian Bohn; Aitor Cortabarria; Volker Härtel; Konrad Kowalczyk
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Paper Abstract

An approach for active noise and vibration control for systems subject to periodic disturbances with time-varying fundamental frequency is presented. The motivation is active compensation of engine-induced noise in automobiles, where the fundamental frequency (engine firing frequency) goes from 7 Hz (idle, 800 rpm) to 50 Hz (6000 rpm) and the frequency (engine speed) is available. In this new approach, an observer for an input disturbance is designed based on a disturbance model containing all frequencies to be cancelled. The disturbance-model part of the observer is time-varying since the current frequency is measured and fed into this part. Based on this frequency measurement, an observer gain is selected from a set of pre-computed gains. The approach is non-adaptive, and the frequency is a scheduling variable. Theoretical issues of the algorithm (observer design) are discussed and real-time results obtained with an active control system in a vehicle are presented. These results show a major reduction of the interior sound pressure level in the vehicle.

Paper Details

Date Published: 1 August 2003
PDF: 12 pages
Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003); doi: 10.1117/12.482709
Show Author Affiliations
Christian Bohn, Continental AG (Germany)
Aitor Cortabarria, Continental AG (Germany)
Volker Härtel, Continental AG (Germany)
Konrad Kowalczyk, Univ. of the German Armed Forces (Germany)

Published in SPIE Proceedings Vol. 5049:
Smart Structures and Materials 2003: Modeling, Signal Processing, and Control
Ralph C. Smith, Editor(s)

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