Modified filtered-x LMS algorithm for active control of vehicle road impact noise

Guohua Sun, Mingfeng Li, Teik C. Lim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Active noise control (ANC) has been applied and proven its efficiency for low-frequency vehicle interior road noise. At this frequency range, the response is typically structureborne noise with Gaussian characteristic due to the tire/road interaction. The typical ANC system for vehicle interior noise is implemented applying feedforward control with filteredx least mean square (FXLMS) algorithm. The approach is based on the assumption that the response is deterministic and/or Gaussian type signal. However, when the vehicle is driven over road bumps or potholes, the generated noise response will be non-Gaussian type with impact behavior. Therefore, the conventional time-domain FXLMS algorithm may not be appropriate for controlling this type of impulsive noise. In this study, a simplified planar half-car vibro-acoustic model coupled with flexible ring tire, and rigid wheel and suspension system is proposed to simulate the interior acoustic response caused by the interaction between tire and road with bumps. Then, an ANC system configured with modified FXLMS (MFXLMS) algorithm with thresholds on reference and error signal paths is designed to demonstrate its feasibility for road impact noise control. Numerical simulation results show that the interior road impact noise at the driver ear position can be reduced by several decibels.

Original languageEnglish (US)
Title of host publication41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
Pages58-69
Number of pages12
StatePublished - 2012
Externally publishedYes
Event41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 - New York, NY, United States
Duration: Aug 19 2012Aug 22 2012

Publication series

Name41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
Volume1

Conference

Conference41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
Country/TerritoryUnited States
CityNew York, NY
Period8/19/128/22/12

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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