Beschreibung
Vorteile und Besonderheiten
Hauptmerkmale
Typische Anwendungen
Komponenten und Aufbau
Messverfahren und -ablauf
Software und Bedienung
Ergebnisse, Datenformate und Schnittstellen
Normen und Richtlinien
FAQ
Description
The Natural frequency test stand allows the dynamic parameters (natural frequency and damping) of various technical components to be determined with just one click. The new software option now also enables pass/fail assessments of the test object. This makes it immediately clear, even to non-technical personnel, which test specimens fail to meet the requirements.
In the development and production of braking systems, brake pads in particular play a key role. For both brake simulation during the development process and quality control in production, the dynamic properties of the brake pads are critical characteristics. The measurement-based determination of these dynamic quantities (also referred to as modal parameters) is described in the SAE J2598 standard. Together with LINK, MAUL-THEET offers a complete system that performs and evaluates these measurements fully automatically at the push of a button in accordance with SAE J2598.
In addition, the NFT can also be used for natural frequency tests on turbine blades.
The acquired data can be saved in LabLINK or exported as ASCII, PDF, or CSV files. If desired, a measurement report can also be automatically generated in Excel or PDF format.
Standards and guidelines
Advantages & Innovations
- Cost and time savings thanks to low personnel requirements
- Automated test system for determining natural frequencies and damping
- Calculation of attenuation or loss factor according to SAE J2598
- Automatic measurement with just one click
- Very short cycle times
- High reproducibility
- Bounce-free excitation
- Non-destructive testing (NDT)
- Software guided measurement
- DAkkS calibration (DIN EN ISO/IEC 17025) possible
- Optional, setting frequency bands for quality control (good/bad statement)
- Freely selectable dB values for the attenuation calculation
- Quality factor for damping value
- Vibration measurement with a microphone, laser Doppler vibrometer or accelerometer
- Frequency range up to 100kHz
- Frequency resolution <1Hz at 20kHz
- Automatic measurement report generation
- Central database through LabLINK
- Data export via LabLINK, ASCII files
Application & Integration
- Testing of brake components according to SAE J2598, SAE J2933 and VDA 302
- Natural frequency measurement
- Quality control
- Series testing
- End-of-line testing
- 100% inspection
- Determination of resonances
- Lightweight construction and NVH optimization
- Structural dynamics
- Damping determination
- Component tests
- Prototype study
- Product testing
- Condition analysis
- Machine diagnostics
- Shovel reworking / post-processing
- Material testing
- Research and development
Components
Excitation unit
The broadband excitation is carried out with an automatic modal hammer
- Frequency ranges up to 60kHz
- 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
- Measurement range up to 100kHz
- 100 to 25,600 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 automatic measurement of test specimens (one-click), data analysis, as well as 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 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
System solutions
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.
System solutions
What we can do for you
In addition to manufacturing and supplying standard measurement systems for determining natural frequency and damping, we design, plan, and develop customized solutions tailored to your requirements. We are also happy to perform the measurements for you as a service.
Please contact us—we will be happy to provide you with a quote.