Noise issues from gear and motor excitation whine are commonly faced by many within the EV and HEV industry. In this paper we present an advanced CAE methodology for troubleshooting and optimizing such NVH phenomenon. Experience has shown that to achieve good NVH behavior in such a challenging environment requires a combination of optimization options. A traditional focus on gear micro geometry to minimize TE alone is often seen as not sufficient for achieving the desired targets.
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