Brüel & Kjær Sound & Vibration Measurement has released version 2019.1 of its NVH Simulator. The release expands the ability to model electric and hybrid vehicles, along with over 200 other improvements and enhancements.
Dave Bogema, Product Manager with Brüel & Kjær, explains: “One of the challenges associated with electric vehicle sound is the phenomena of non-zero-crossing and negative orders. These arise from the operation of the power electronics controlling the motor. Typically, this manifests as tonal harmonics increasing and decreasing in frequency simultaneously, centred around a higher-frequency tone. These harmonics have been difficult or impossible to extract from a measurement.”
With the new release, the company says that the tonal harmonics can be extracted from a measurement and resynthesized in real-time driver-in-the-loop simulations using the NVH Simulator software.
Source: Brüel & Kjær