Extension of a modal instability theory to real brake systems

Brake squeal emission is still one of the major problems in brake design, because there is not yet a clear understanding of the phenomenon. A crucial problem in studying squeal is the complexity of brake systems. For this reason many researchers in this field prefer to develop simplified, easy to model, experimental set-ups. In the past years, some researches were addressed to modeling such simplified brake systems that brought to the “lock-in ” theory, able to explain the squeal occurrence on the developed experimental set-ups. This paper presents a parallel experimental and numerical analysis, aimed to extend the “lock-in ” theory from simplified set-ups to real brake systems. The analysis of the dynamic behavior of the set-up is described and tied to the squeal occurrence