Motion capture of a pad measured with accelerometers during squeal noise in a real brake system

Franck Renaud (1) , Gaël Chevallier (1) , Jean-Luc Dion (1) , Guillaume Taudière (2)

1 LISMMA - Laboratoire d'Ingénierie des Systèmes Mécaniques et des MAtériaux
2 Bosch (Chassis System Brakes)

The operating deflection shape of a pad during squeal noise is measured on a real brake system with three-axis accelerometers. A time-frequency analysis is performed that highlights the dependency of squeal on the hydraulic pressure of the system and shows that squeal occurs simultaneously with harmonic components. The operating deflection shape of this pad before and during squeal is then visualized using interpolation, showing the predominance of bending motion. Finally, the pad motions observed are compared to the real modal basis of a detailed Finite Element model.

Mots clés: Squeal; Brake system; Motion capture; Operating deflection shape

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]

Franck Renaud, Gaël Chevallier, Jean-Luc Dion, Guillaume Taudière. Motion capture of a pad measured with accelerometers during squeal noise in a real brake system. Mechanical Systems and Signal Processing, 2012, 33, pp.155-166. ⟨10.1016/J.YMSSP.2012.06.027⟩. ⟨hal-00759973⟩