Automotive Engineering - June 2023 - 24

ENGINEERING AT THE
NEW NVH
FRONTIER
FEV vehicle
interior noise
simulation for
airborne and
structure-borne
transfer-path
analysis.
tried, where the FSS requires a physical seat change.
The dedicated NVH simulator " can instantly change the
seat parameters and feel the difference between seats, "
Bogema noted. " They're designed for different use cases, "
he said - the FSS is very much aimed at ride comfort;
the NVH version is for dialing in refinement. "
Engineers also are realizing they can do sound design
at the desktop, interactively, and come up with different
soundscapes for the car. Vibration plays into that. " Do
you really need the whole motion of the car in the
sound design? Maybe not all the time, " Bogema said.
Bespoke NVH components
Vibracoustic's new sophisticated,
purpose-designed NVH bracket for
air-suspension hardware.
Conference. Capable of simulations from 0.5Hz to 20kHz, the
Compact FSS delivers both primary and secondary driving motion,
vibration, and sound, simultaneously. While not a traditional hexapod-type
simulator design, the FSS's four legs enable it to accurately
replicate the motion of the road as generated when driving over potholes,
cobblestones, or any other surface. Its vibration shakers produce
high-frequency vibration through the steering wheel and the
seat, in addition to the motion from the road.
VI-grade also offers a dedicated Compact NVH driving simulator
that allows engineers to dial in exactly what the car is going to feel like
for NVH. Its seat structure allows an array of virtual seat designs to be
24 June 2023
Raising the thresholds of vehicle refinement is not exclusive
to EVs. Experts say EVs and hybrids are driving
new designs and NVH-reduction approaches across
product segments including those still dominated by
IC-engine vehicles. They note, however, that cost pressures
can make sophisticated designs a tough sell unless
their NVH performance is exceptional.
An example of a new NVH-focused component is
a new tunable bracket for air suspension air-supply
units (ASU) recently launched by Vibracoustic, a
leading global automotive NVH solutions supplier.
The simple yet sophisticated new ASU, shown in the
accompanying image, features a plastic base (previously
steel) for improved damping, and bellow-style
rubber bushings and bump stops. The bushings' special
material properties give the required stiffness
AUTOMOTIVE ENGINEERING
FROM TOP: FEV; VIBRACOUSTIC

Automotive Engineering - June 2023

Table of Contents for the Digital Edition of Automotive Engineering - June 2023

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Automotive Engineering - June 2023 - CVRA
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