Accurate high-frequency FRF testing to meet the challenges of electric and hybrid vehicles

The art of measuring vibroacoustic FRFs has been applied and refined over decades. But with the shift to hybrid and electric vehicles, new challenges present themselves. Electric noise sources generate acoustic energy at a higher frequency than traditional combustion engines.

This white paper describes how to perform high-frequency FRF testing in hybrid and electric vehicles. It unveils potential challenges and demonstrates how using Simcenter Qsources structural and acoustic excitation hardware with Simcenter SCADAS hardware and Simcenter Testlab software can help you to meet the new NVH & acoustic challenges of electric and hybrid vehicles.

Increased accuracy during FRF testing of hybrid and electric vehicles

The transition from combustion engines to various sorts of hybrid and electric drivelines increases the complexity of vibroacoustic FRF testing, as the bulk part of the acoustic energy content is in higher frequency bands. Typically, electromagnetic forces due to inverter switching lead to dominant noise at ear locations above 1 kilohertz (kHz). At these frequencies, it is challenging to inject enough energy into the system to obtain a response with a sufficient signal-to-noise ratio.

Still, measuring FRFs in hybrid and electric vehicles is essential to understand these electric noise sources and to evaluate what the role of sound packages can be.

Read the white paper and discover useful guidelines and essential information to accurately measure high-frequency FRFs.