Description
Brake pads play a central role in the development and production of brake systems. The dynamic sizes of the brake pads are essential features both for the simulation of the brakes during the development process and for quality control in production. The measurement-based determination of the dynamic variables (also modal variables) of brake pads is described in SAE J2598. MAUL-THEET offers a complete system that automatically carries out, evaluates and documents these measurements. With the FDT it is also possible to determine the dynamic variables (natural frequencies and damping) of other technical components.
Advantages & Innovations
- Cost and time savings thanks to low personnel costs
- Automated test system for determining natural frequencies and damping
- User-friendly software
- Excitation by automatic modal hammer
- Vibration measurement with a laser Doppler vibrometer, accelerometer or microphone
- Calculation of attenuation or loss factor according to SAE J2598
- Quality assessment based on the frequency tolerances
- Frequency range up to 100kHz
- Frequency resolution < 1Hz to 20kHz
- Project-orientated database structure
- Central SQL database for multiple workstations
- Automatic measurement report generation
- Freely selectable dB values for the attenuation calculation for each natural frequency
- Temperature measurement with optional frequency correction
Application & Integration
- Damping values of brake pads according to SAE J2598
- Quality control
- Series testing
- Material testing
- Research and development
- Product testing
- Model updating
- Experimental modal analysis
Components
Excitation unit
The broadband excitation is carried out with an automatic modal hammer
- Frequency ranges up to 40kHz
- Impact forces up to 2500N
- High reproducibility
Vibration sensor
The FDT can be operated with the following vibration sensors
- Microphone
- Laser Doppler vibrometer
- Accelerometer
Measurement data acquisition
4-channel measuring system with synchronous scanning
- AC, DC and IEPE coupling
- Anti-aliasing filter
- 24-bit resolution
- Frequency ranges 1 to 100kHz
- Frequency resolution 100 to 26500 FFT lines
Windows PC
- Standard or industrial PC, also according to customer requirements, with Windows 10/11
Software
The FDT software controls the entire testing process. It includes user administration, management of test objects, work orders, measurements, analyses, documentation and report generation.
Specification of the test object
- Name and meta data
- dB values for attenuation calculation (0.5 to 3dB)
- Frequency range 1 to 40kHz selectable
- Frequency resolution (number of FFT lines) selectable
- Frequency bands and permissible tolerance ranges
Measuring sequence according to a task
- Series measurement
- Repeat measurement
Automatic measurement procedure
- Triggering the automatic modal hammer
- Measurement of the excitation force and the vibration response
- FRF averaging
- Peak picking, attenuation calculation and quality assessment
Report creation and output of results for each job as a table
- Printer, PDF, Excel, CSV, etc.
What we can do for you
In addition to the production and delivery of standard measuring systems for natural frequency and damping determination, we design, plan and develop customer-specific solutions according to your requirements. We would also be happy to carry out the measurements for you as a service.
Contact us, we will be happy to make you an offer.