Development of a new low order nonlinear system experiment motivated by brake squeal problem

The chief objective of this paper is to describe the need for a new experiment that is motivated by brake squeal problem to understand the role of several parameters. Specifically, these parameters are normal force vectors, relative sliding speed and preload. The simplified experiment is designed with a mass placed on a conveyor belt driven by an electric motor in a controlled manner. The mass is pressed against the belt via two telescopic beams from one end but attached to a fixed frame at the other end. Springs are also used on the telescopic beams to adjust the preload applied on the mass. Furthermore, telescopic beams can slide along the fixed frame so that their angular configurations may be altered. Initial tests are conducted and accelerations of the mass with four uniaxial accelerometers (at the edges) are acquired and analyzed in frequency domain. In particular, tests are performed at different electric motor speeds, preload levels and normal force angular configurations. The measured data qualitatively confirm the effects of these parameters on the nonlinear physics. Further work is required to gain a better understanding about the precise role of these parameters from the perspective of nonlinear behavior and squeal phenomena.