Brake Noise Testing - Brake Squeal Analysis

Dewesoft Brake Noise testing solution, also known as Brake Squeal, is ideal for detecting and tracking noise caused by mechanical vibration in various braking systems based on the VDA 303 guideline algorithm.

Brake Noise Testing and Brake Squeal Analysis solution from Dewesoft
Sound
Sound
Sound pressure
Sound pressure
Vibrations
Vibrations
Temperature
Temperature
Acceleration
Acceleration
Velocity
Velocity
RPM
RPM
Force
Force
CAN bus
CAN bus
CAN FD
CAN FD
XCP/CCP
XCP/CCP
FlexRay
FlexRay
Polygon
Polygon
Video
Video
Thermal video
Thermal video
High-speed video
High-speed video
GPS/GLONASS
GPS/GLONASS
Inertial platforms
Inertial platforms

Main Features

  • VDA 303 GUIDELINE: Software is developed according to VDA 303 guideline.
  • EASY SENSOR PAIR DEFINITION: Detects squeal events from pairs of microphone and accelerometer measurements. Pairs are generated automatically from specified accelerometer and microphone channels. 
  • AUTOMATIC CALCULATION: Squeals are determined from amplitudes of sound and mechanical vibration. Fourier transformation settings are integrated. Only direct time-domain measurements are needed to detect squeal events. 
  • FLEXIBLE CONFIGURATION: The number of microphone and accelerometer channels is not limited by the software. 
  • SQUEAL TRACKING: Each detected squeal is tracked. During the squeal event, statistics on squeal parameters and other Dewesoft X channels (temperatures, RPMs, vehicle speed...) can be calculated.
  • EASY TO ADD OTHER APPLICATIONS: Our solution is very flexible and offers easy extendability of the data acquisition systems to perform other NVH tests.
  • LIFETIME FREE SOFTWARE UPGRADES AND SUPPORT: Our data acquisition systems come bundled with award-winning Dewesoft X data acquisition software. The software package is always evolving and new features are being added. We offer lifetime FREE software upgrades and technical support to all our users.

Brake Noise Detection

The detection of brake noise is based on the comparison of sound and the mechanical vibration amplitude spectrum. The only inputs needed to detect brake noise events are sound and vibration measurements.

Amplitude spectrum calculation with a fast Fourier transform (FFT) algorithm is integrated into the DAQ software. During the measurement, the software detects and tracks multiple brake noise events in multiple sound-vibration detection pairs simultaneously. Statistical parameters of the noise event, or any scalar Dewesoft X channel, can be calculated in real-time during an actual brake noise event.
 
Brake noise solution is very flexible regarding DAQ hardware configurations. With an automatic pairing of defined sound and vibration inputs in detection pairs, the configuration workload is significantly reduced for large measurement setups. Any number of arbitrary channels such as temperature, RPM, brake pressure, etc. can be added, and statistics calculated.

The number of brake systems measured and analyzed is only limited by the available computer resources. Similar to any Dewesoft X math modules, Brake squeal can also be used in the post-analysis mode to recalculate the data and correct initial setup mistakes.

Brake Noise Input Channel Configuration

Dewesoft brake noise solution offers a very flexible and simple channel configuration:

  • Inputs and statistics are defined in channel groups
  • Each microphone or accelerometer channel will generate an FFT output
  • Statistics are output for each microphone-accelerometer pair
  • Global microphones are paired with all accelerometers in local groups
  • Local microphones are paired only with accelerometers in the local group
  • Global channel statistics are calculated on all squeal pairs, local only on local pairs
  • The number of local groups is unlimited

Brake Noise Analysis Results

Results of plugin calculations are written in the outputs. There are three different types of outputs:

  • Amplitude spectrum: Result of the amplitude spectrum calculation of each microphone and accelerometer is written in an asynchronous array channel.
  • Statistic outputs: The statistic calculations on each microphone-accelerometer detection pair have their own outputs. Results of statistics calculations are noted for each noise event when it finished. Statistic results are always outputs in an asynchronous scalar channel.
  • Tracking status: One tracking status only can be output in the plugin. The state of the tracking algorithm is output in accordance with Tracking status.

Additional Brake Squeal Resources

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