Détermination de l’amortissement SAEJ2598 | vDamp
Overview
Brake pads are of central importance in the development and production of brake systems. The dynamic properties of the brake pads are essential characteristics for simulating the brakes during the development process or for quality control in production. The measurement of the dynamic properties (including modal values) of brake pads is described in SAEJ2598. MAUL-THEET offers a complete system that automatically carries out, evaluates and documents these measurements in accordance with SAEJ2598. With the MAUL-THEET test bench it is also possible to determine the dynamic properties (natural frequencies and damping) of other technical components.
The Maul-Theet damping Test Stand SAE J2598 (vDamp) is optimized for the determination of:
Natural Frequencies
Damping Values of brake parts following SAE J2598.
It consists of an aluminium construction with the following components:
Excitation Unit
Vibration Sensor
Data Acquisition
Windows PC
SAEJ2598
Frequency Range better than standard requirement (500Hz to 16 kHz)
Frequency Resolution < 1 Hz at 20 kHz
Calculation of Damping or Loss Factor according to SAE J2598
Selectable dB Values for Damping Estimation for each Natural Frequency
Quality Sentencing based on Frequency Tolerances
Temperature Measurement with optional Frequency Correction
Excitation Unit
The broad band excitation is done with an Automatic Impact Hammer:
Frequency Range 0.3 to 40 kHz
Impact Force up to 200N peak
High Reproducibility
Vibration Sensor
The following sensors can be used with the VTS:
Microphone
Laser Doppler Vibrometer
Acceleration Sensor
Data Acquisition
4 Channel DAQ synchronous sampling:
Frequency Ranges 1 kHz to 40 kHz
Frequency Resolution100 to 26500 FFT Lines
AC, DC and IEPE Coupling
Windows PC
All in One PC with Windows 10:
8 GB RAM
256 GB SSD
vDamp SAEJ2598 Software
The vDamp software handles the complete test procedure. It covers user management, parts and work order handling, measurements, analysis, documentation and reporting.
Part type specification:
Name and Meta data
Frequency range 1 kHz - 20 kHz selectable
Frequency Resolution (No of FFT lines) selectable
Frequency bands, Frequency Tolerances
dB Values for Damping Calculation (0.5 to 3dB)
Measurement Procedure based on Work Order:
Serial Measurement
Repetition Measurement
Automatic Measurement Procedure:
Triggering of Automatic Impact Hammer
Measurement of Excitation Force and Vibration Response
Averaging and Analysis
Peak Picking, Damping Calculation and Sentencing
Reporting Output of Work Order Results as Chart to:
Printer, PDF, Excel, CSV, etc.
Data Export:
ASCII Files
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