FVA 682 II Further Development of the NVH Simulation Model

 

Further Development of the simulation possibilities for electrical drive acoustics in the context of the vehicle structure

 

Motivation

One million electric vehicles by 2020 – fundamental acceptance of the technology – is required to achieve this federal government objective. The high-frequency vehicle interior noise, caused by the drivetrain, is in particular often perceived as unpleasant. Optimized simulation models and evaluation methods are required for the prediction, optimization, and evaluation of this noise, without variants and the need for cost-intensive production of prototypes.

 

Research objectives

Compared to the current state of the art, further effects will be included in the modeling process to improve the objective prediction quality of the sound pressure in the vehicle interior. A methodology that enables psycho-acoustic assessment of the drive noise will be developed to assess the significane of model details. The following goals will be pursued:

  • Acoustic measurement of an experimental vehicle on a test track
  • Cross-domain modeling: electrical, mechanical, and acoustic
  • Special model details:
    • Electrical: sensor systems, control system, power electronics, eccentric operation of the electric motor
    • Mechanical (structural dynamics): damping in the housing assemblies, elastomer bearings, structure-borne noise transfer paths
    • Acoustic: airborne noise emissions, airborne noise transfer paths
  • Validation of the model on a drivetrain test bench
  • Methodology for the psychoacoustic evaluation of drivetrain noise
  • Assessment of the relevance of the detail levels of the model

Research and project partners

  • RWTH Aachen University, Institute for Machine Elements and System Engineering, MSE
  • RWTH Aachen University, Institute for Electrical Machines, IEM
  • RWTH Aachen University, Institute for Technical Acoustics, ITA
  • Research Association for Drive Technology, FVA

  BMWi Logo Copyright: BMWi

Supported by

The Federal Ministry for Economic Affairs and Energy

  AIF Logo Copyright: AIF

Project sponsor

The Federation of Industrial Research Associations "Otto von Guericke", Aif