Overview
The Frequency and Damping Test Stand (FDT) by MAUL-THEET GmbH is designed for determining natural frequencies and damping values of brake parts, adhering to SAE J2598 standards. It features an aluminum construction with components including an Excitation Unit, Vibration Sensor, Data Acquisition system, and a Windows PC.

Excitation Unit
The unit uses an Automatic Impact Hammer for broad band excitation, covering a frequency range of 0.3 to 40 kHz and an impact force up to 200N peak, ensuring high reproducibility.

Vibration Sensor
The FDT supports various sensors such as Microphones, Laser Doppler Vibrometers, and Acceleration Sensors.

Data Acquisition
The system includes a 4 Channel DAQ with synchronous sampling, supporting frequency ranges from 1 kHz to 100 kHz and frequency resolution from 100 to 26500 FFT lines, with AC, DC, and IEPE coupling.

Windows PC
An All-in-One PC with Windows 10, equipped with 8 GB RAM and a 256 GB SSD, is used for data processing.

SAE J2598 Compliance
The FDT exceeds standard requirements with a frequency range better than 500Hz to 16 kHz and a frequency resolution of less than 1 Hz at 20 kHz. It calculates damping or loss factors and allows selectable dB values for damping estimation for each natural frequency. Quality sentencing is based on frequency tolerances, with optional temperature measurement and frequency correction.

Measurement Types
The system supports various measurement types including Part Type Definition, Serial Measurement, Repetition Measurement, and Master Part Measurement.

Data Management
Data is managed through an SQL database, covering user management, work orders, part types, measurement data, and reporting.

Software
The software manages the entire test procedure, including user management, parts and work order handling, measurements, analysis, documentation, and reporting. It allows for part type specification, frequency range selection, and frequency resolution selection.

Measurement Procedure
Based on work orders, the procedure includes Serial and Repetition Measurements, with automatic triggering of the impact hammer, measurement of excitation force and vibration response, averaging, analysis, peak picking, damping calculation, and sentencing.

Reporting and Data Export
Results can be output as charts to printers, PDFs, Excel, CSV, etc., with data export available in ASCII files.