Electrified propulsion systems are a growing part of modern transportation. The changing noise/sound landscape is increasingly demanding modern NVH engineering. At AVL, we have solutions and processes for optimizing the design and quality assurance of interior and exterior vehicle sound. For e-motors, our NVH testing solutions range from high-end, to precision, to efficiency setup – depending on the testing requirements.
As a company, we deliver testing equipment and perform high-tech engineering of single components, powertrains, and complete propulsion systems. We find innovative and user-oriented solutions – depending on our customers’ units under test (UUT). We understand and commit to the strict acoustic standards – and aim to guarantee the commonly agreed NVH targets for the dedicated test system. All components are tuned, and the system is validated by an acceptance analysis.
Specifications
With our NVH test systems for validating e-motors, we support all unit under test (UUT) variants. Our aim is to create development environments that can solve NVH development challenges quickly, efficiently, and sustainably. NVH test systems offer a range of solutions depending on the priorities of the main features, which can be summarized in three main areas across all UUTs:
• Premium setup
• Precision setup
• Efficiency setup
| Setup | Details |
|
Premium |
The focus of this test system type is on developing ultra-silent motors with an acceptable trade-off in terms of the testing environment. Taking advantage of the unique shape of the acoustic room, the UUT is placed in the acoustic-free field . Whilst isolating the load unit and rotating parts acoustically, the ultra-low background noise level of < 50 dB(A) sets new standards for acoustic development. |
| Precision | This second focus refers to the exact alignment of the testbed with regards to full compliance with current NVH standards, such as ISO 3745. The design allows for a complete microphone hemisphere without interference surfaces of the mechanical setup. |
| Efficiency | Efficiency is a major topic in the transformation of existing testbeds. For customers who have invested in an NVH chamber and/or a component testbed, we have created our efficiency product line. The focus is on conveniently transforming the testbed into a solution that seeks the best compromise between reasonable power and NVH performance. |
Highly Customizable
Standard and highly customizable testing solutions from single components to full vehicles
Guaranteed Noise Limits
Guaranteed NVH behavior through optimal NVH design
Minimal Footprint
Lowest acoustic impact due to minimal footprint
Full Performance
Uncompromised power, torque, and speed performance combined with seamless integration into AVL‘s toolchain
Premium Setup
- Highest level of measurement accuracy and wide homogeneous free-field condition thanks to optimized test system design
- Ultra-low noise level from test system to enable outstanding SNR (signal-to-noise ratio) for guaranteed class 1 measurement results
- Fully independent vibration behavior of UUT thanks to innovative decoupling concept
- Full performance in power, torque, and speed, combined with seamless integration into the AVL toolchain
Precision Setup
- Uncompromised compliance with ISO3745, especially regarding test setup and measurement accuracy
- Precise detection of single-spot noise phenomena for the UUT thanks to availability of full microphone array
- Fully independent vibration behavior of UUT thanks to decoupling concept
- Full performance in power, torque, and speed, combined with seamless integration into the AVL toolchain
Efficiency Setup
- Easy and fast upgrade of existing anechoic chambers (e.g. engine or propulsion system testbed) to high-performance e-motor NVH test systems
- Minimized acoustic reflections due to optimized shape and surface of dyno enclosure
- Flexibility to use the NVH test chamber for different UUTs (e-motor, e-axle, powertrain) due to easy and free positioning of the test system inside
- Full performance in power, torque, and speed, combined with seamless integration into the AVL toolchain
NVH is not only about improving noise on vehicles and powertrains, much more it’s about setting up a brand sound, inspiring the passengers of modern cars during their ride. With our NVH test systems and solutions we provide a high class development platform for sound development and drive the pleasure of tomorrow’s mobility.”
– Joachim Schmidt, Department Manager, AVL List GmbH
AVL E-Mobility Testing Solutions – Brochure
Tested and Trusted.
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Our commitment to silence.
NVH Test Systems – Brochure
Our commitment to silence.
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