The increasing complexity of vehicle architectures demands extensive calibration and optimization programs. This especially includes the measurement and analysis of various kinds of acoustic signals such as noise and vibration (NVH).
Over the course of product development in the automotive industry, sooner or later it is necessary to cross-correlate acoustic signals with those from the combustion engine, e-motor, inverter, and other sources.
One typical requirement is the clear identification of the root cause of noise and the correlation of unwanted vibrations or airborne noises to acoustic surfaces and to electrical excitation inside the stator of an electric motor.
The X-FEM NVH is a 4-channel acquisition module suitable for use with all common acoustic sensor output types such as voltage, charge and ICP/IEPE. Each channel can be individually configured.
All raw signals are stored in a compressed file at high resolution and in time-synchronized formats. The signals and relevant KPI’s are available in real-time and can be transmitted to an automation system or optimization software for further processing.
The optional NVH TOOLBOX for AVL IndiCom™ or AVL Concerto™ includes the most common NVH analysis tools and online NVH macros, which significantly accelerates and simplifies both data acquisition and subsequent data evaluation.
| Technical Data | Unit |
|
Sampling rate per channel |
500 kS/s |
| Resolution | 24 bit or 16 bit |
| Bandwidth | 0 - 200 kHz |
| Total error | < 0.05 % FSR |
| Filter type, cut-off frequency | FIR, 200 kHz |
| Data types | Time based |
X-FEM NVH
The X-ion Front-End Modules – or X-FEM – enable smart modularity and ensure AVL X-ion is a perfect match for each application.
HIGH ACCURACY
The NVH module has four inputs for microphones or accelerometers (IEPE/ICP or charge sensors) and offers a resolution of 24 bit with a sampling rate of up to 500 kS/s.
Software for NVH Analysis
The AVL NVH Toolbox with its embedded online NVH Macros enables the online acquisition and real-time KPI evaluation of acoustic and vibration signals and also provides a basic toolkit for offline NVH measurement data analysis.
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AVL IndiCom™ is a comprehensive software platform for data acquisition and signal processing tailored for mobility and energy sectors. The applications are e-power, combustion, EIS, or NVH analysis.
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AVL has a long tradition and great experience in NVH (Noise, Vibration, Harshness) powertrain development and vehicle sound design. For this reason, AVL has introduced a high-end NVH testbed for NVH testing ranging from components up to complete vehicle testing.
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