Innovative Tools for Experimental Modal Analysis of Brake Discs

Brake discs play a crucial role in the safe operation of passenger cars and commercial vehicles. The standards and guidelines that guarantee this safe operation specify which measurement sensors can be used when testing brake discs in development. In this chapter, a novel measurement method is used to analyze vibrations on brake discs based on the German guideline VDA 301. Using a high-speed camera and image-based vibration analysis, modes are determined by means of experimental modal analysis and compared with the results of the standard sensor specified in the guideline. Preparation of the brake disc via speckle pattern is not required since an AI-based full-field optical flow algorithm is utilized to extract displacement data from recorded images. A smart pulse hammer is used for automatic, reproducible excitation.