Virtual Acoustic Prototyping of Automotive Boosting Systems in Vehicle Environment, a Hybrid Approach

Abstract

<div class="section abstract"><div class="htmlview paragraph">In the context of automotive air boosting systems, such as turbochargers and full-cell compressors, earlier and more realistic noise evaluations are crucial in evaluating the impact a design has on the final acoustic performance perceived by the end user in the vehicle cabin environment. This requires a combined assessment of the acoustic sources from boosting systems, other vehicle interior noise sources, and the acoustic transfer path from the boosting system to the vehicle cabin. Performing such an assessment experimentally cannot be done early in development with representative hardware and can be expensive. Also, managing such an assessment entirely through simulations is very complex and error prone.</div><div class="htmlview paragraph">The present study proposes a hybrid approach to tackle this noise challenge. This methodology combines the noises of high-speed rotating machine simulated rotor-dynamic and electromagnetic simulation processes, their transformation from frequency to time domain, and coupling with experimental vehicle noise data. This methodology makes it possible to virtually recreate an acoustics scenario at vehicle cabin level in realistic vehicle operating conditions. This enables earlier, faster, and easier objective and subjective evaluation of noise response as a function of component design changes, vehicle transfer function, and drive cycles, which are critical in determining the right corrective actions to mitigate potential noise risks in vehicle.</div></div>