Abstract
Several trends could currently be observed in the automotive industry which are affecting Noise, Vibration and Harshness (NVH) development for new vehicles or platforms. Firstly, many axle systems are being adjusted for new electrified architectures. Secondly, e-axles are creating comfort relevant structure borne noise at higher frequencies compared to non-electrified axles. Furthermore, virtualization and “front-loading” of the NVH tuning can be seen to avoid intensive hardware testing. The combination of these trends is challenging for Original Equipment Manufacturers (OEMs). As a leading global automotive NVH development supplier, Vibracoustic has devised unique NVH axle test rigs and virtual approaches to support OEMs on their way to superior NVH performance. Vibracoustic employs proprietary NVH test rigs to analyze and optimize entire axles without the surrounding vehicle. Load cells at all interface points, acceleration sensors and other signal sources permit a comprehensive characterization of an axle. In our publication [1] we focused on the frequency band up to 250 Hz while the axle is either subjected to hydraulic shake inputs at the wheel hubs or running on a dyno. In this presentation we want to extend the method for e-axle NVH up to 2 kHz. Vibracoustic is collaborating with OEMs to enrich their virtual NVH development and optimization processes. In this paper we introduce two new approaches to investigate the NVH performance experimentally on full e-axle level and how these approaches are used to foster “front-loading” of NVH developments.
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© 2023 Der/die Autor(en), exklusiv lizenziert an Springer Fachmedien Wiesbaden GmbH, ein Teil von Springer Nature
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Sell, D.H., Löcken, D.F., Kruse, E. (2023). NVH Optimization of Electrified Axles—New “Front-loading” Approaches. In: Heintzel, A. (eds) Automotive Acoustics Conference 2021. AUAC 2021. Proceedings. Springer Vieweg, Wiesbaden. https://doi.org/10.1007/978-3-658-41475-7_6
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DOI: https://doi.org/10.1007/978-3-658-41475-7_6
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