Development of a time-domain Active Noise Equalizing (ANE) controller using a finite element model and real-time simulations

Schulz, Alexander; Karl, Tim; Sachau, Delf; Homm, Anton

doi:10.1121/10.0037483

Development of a time-domain Active Noise Equalizing (ANE) controller using a finite element model and real-time simulations

Publication date

2025-04-01

Document type

Meeting Abstract

Author

Schulz, Alexander

Karl, Tim

Sachau, Delf

Homm, Anton

Organisational unit

Mechatronik

DOI

10.1121/10.0037483

URI

https://openhsu.ub.hsu-hh.de/handle/10.24405/23121

Conference

188th Meeting of the Acoustical Society of America joint with 25th International Congress on Acoustics ; New Orleans, LA, USA ; May 18–23, 2025

Publisher

Acoustical Society of America (ASA)

Series or journal

Journal of the Acoustical Society of America

ISSN

0001-4966

Periodical volume

157

Article ID

A84

Part of the university bibliography

✅

Language

English

Abstract

The acoustic signature of a ship is critical for detection and identification. Therefore, studying and controlling hydroacoustic signatures is increasingly important, especially in military applications where stealth is crucial. Frequency-domain ANE controllers are commonly used, because they can target specific frequencies effectively. Although, time-domain controllers provide fast and robust noise control, they are still underexplored. Here a time-domain ANE controller is being developed, using rapid control prototyping and a finite element (FE) model of a simplified ship hull section. To enable real-time simulation, the FE model is converted into a time-discrete linear-time-invariant-state-space model, using subspace methods. The controller combines Active Vibration Control with the FxLMS algorithm, modified by a signal processing algorithm to manage multi-tonal noise reduction and amplification. Validation occurs in a combined simulation, with noise reduction and amplification, tested under dynamic environmental conditions. Furthermore, the simulation results are validated experimentally. The controller is implemented and tested on a scaled model of a patrol boat (1:8) under laboratory conditions (airborne sound field). The measurement setup is similar to the FE model of the controller development. Results show that the time-domain controller is capable of reducing emissions of tonal frequencies in multi-tone excitation by up to 16 dB.

Description

A companion article has been published: https://doi.org/10.1121/2.0002172

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (https://creativecommons.org/licenses/by-nc/4.0).

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Published version

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