Automotive Disc Brake Pad Natural Frequency and Damping Test
This procedure is applicable to brake pad modes between 500 Hz. and 16 kHz. The parameters measured with this procedure are defined as the first three natural frequencies, fn (n=1, 2, 3), and the corresponding loss factors, .
Rationale: The SAE Brake NVH Standards Committee reviewed the SAE J2598 standard and agreed that:
- No modification is required in the measurement requirements/test configuration sections.
- Additional methods to calculate the damping factor should be added to the standard (Chapter 9).