Brake NVH Dynamometer
Model 3900
System Features |
|

System Features |
|
The Model 3900 Dynamometer provides capability for noise and vibration testing of brake corner and axle fixtures. This machine provides the ability to reproduce a wide range of brake noise issues from moan/groan (low frequency) to squeal (high frequency). The system incorporates state-of-the-art technology for optimal correlation to actual operating conditions.
The brake test cell is separated from the dynamometer drive and support systems to isolate outside noise and vibration sources. The dynamometer enables close correlation with existing certification test protocols including SAE J2521. Additionally, the enclosure is constructed to allow environmental testing using standard environmental conditioning unit. The typical unit provides ranges of -20º C to 40º C and 20 to 90% relative humidity.
The ProLink software package integrates dynamometer operation, digital video, data acquisition, data analysis and reporting. The NVH module is based on the Brüel & Kjær PULSE™ system. The PULSE system runs under the ProLink software package to maximize the ease of use while providing a full set of noise and vibration analysis capabilities.

Typical Specifications |
|
| Software Package | ProLink Microsoft Windows® based |
| Sample Rate | Conventional channels: 1000 samples/sec/channel (typical) |
| Test Parts | Conventional, knuckle, corner, axle brake assemblies |
| Main Drive Motor | 185 kW (250 HP) DC |
| Max. Speed | 850/2000 rpm (Optional 850/2500 rpm) |
| Pressure | 206 bar (3000 psi) |
| Brake Apply | Servo air over brake fluid: 517 bar/sec (7500 psi/sec) |
| Mechanical Inertia | 2 Removable Discs: 75 kgm^2 (55.32 slug-ft^2) ea. disc Maximum: 250 kgm^2 (184.4 slug-ft^2) |
| Electric Inertia Simulation | Minimum with Simulation: 4.9 kgm^2 (3.62 slug-ft^2) Simulated Amount: Ref. Inertia vs. Decel curve upon request Control Accuracy: +/- 1.0% |
| Temperature | 4 rotating (slip ring) and 4 non-rotating |
| Torque | 5640 Nm (50,000 in-lbs) in-line rotating |
Options |
|
