Natural frequency test stand SAE J2598 | NFT

Description

With the frequency test stand it is possible to determine the dynamic variables (natural frequencies and attenuation) of various technical components with one click. Thanks to the new software option, it is now also possible to make pass/bad statements about the test object at the same time, which means that even non-specialist personnel can quickly see which test objects do not meet the requirements.

Brake pads, for example, play a key role in the development and production of brake systems. Both for the simulation of the brakes during the development process and for quality control in production, the dynamic parameters of the brake pads are essential characteristics. The metrological determination of the dynamic variables (also modal variables) of brake pads is described, for example, in SAE J2598. With LINK, MAUL-THEET offers a complete system that automatically carries out and evaluates these measurements in accordance with SAE J2598 at the push of a button. The data obtained in this way can be saved in LabLINK or output as ASCII, PDF and CSV. A report can be automatically created for the measurement as an Excel or PDF file.

Advantages & Innovations

Cost and time savings thanks to low personnel costs
Automated test system for determining natural frequencies and damping
User-friendly software
Automatic measurement with just one mouse click
Optional, setting frequency bands for quality control (good/bad statement)
Software guided measurement
Vibration measurement with a microphone, laser Doppler vibrometer or accelerometer

Excitation by automatic modal hammer
Frequency range up to 100kHz
Frequency resolution < 1Hz to 20kHz
Calculation of attenuation or loss factor according to SAE J2598
Freely selectable dB values for the attenuation calculation
Quality factor for damping value
Automatic measurement report generation
Central database through LabLINK
Data export via LabLINK, ASCII files

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

Vibration exciter

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 NFT 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 NFT software controls the entire testing process. It includes the automatic measurement of test items (one click), data analysis, as well as documentation and report creation.

Specification of the test object

Name and meta data
dB values for attenuation calculation (0.5 to 3dB)
Frequency range 1 to 100kHz selectable
Frequency resolution (number of FFT lines) selectable
Frequency bands and permissible tolerance ranges

Measurements for a test object

Measurements on a component
Presentation of results and measurement report for a component

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 examinee

Custom report template
Printer, PDF, Excel, CSV, etc.

What we can do for you

In addition to the production and delivery of standard measuring systems for determining natural frequency and damping, 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.