Brüel & Kjær Sound & Vibration Measurement has released version 2019.1 of its NVH Simulator, which expands the ability to model electric and hybrid vehicles, and incorporates over 200 other improvements and enhancements.
Dave Bogema, product manager at Brüel & Kjær, explained, “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, centered around a higher frequency tone. These harmonics have been difficult or impossible to extract from a measurement.”
With the 2019.1 release, not only can these tonal harmonics be extracted from a measurement, but they can also be resynthesized in real-time driver-in-the-loop simulations using the NVH Simulator software.
