Abstract
The creep groan cycle involves brake component low frequency vibration excited by the forcing exerted at the interface between the brake pads and the disc. The groan phenomenon on a test vehicle and on a laboratory rig that includes the full front suspension of the target vehicle has been studied. The rig can be considered a local approximation of the car with respect to the brake component region. Its validation is discussed and results are compared to the ones obtained from the vehicle. A relevant difference between the static and dynamic coefficient of friction has been measured and identified as the main cause of the stick-slip friction induced vibration. A multi-body mathematical model reproducing the rig measured data is proposed.