Friction-induced oscillations of a slider: Parametric study of some system parameters (original) (raw)

A typical frictionally excited pin on disk system is modeled as a basis for vibration control. The model is based on chosen experimental setup parameters. The analysis incorporates normal, tangential and torsional degrees of freedom. The effect of varying both the normal force and the pin stiffness on the response of the pin subsystem in all directions is investigated numerically. A detailed parametric study shows that the operating condition namely the normal force and the rotational speed have a remarkable influence on the response. A correlation between measured and calculated system response is presented, that supports the validity of the presented model. The dynamic characteristics of the system, namely stiffness of the pin in both normal and torsional direction, have no significant effect on its response, while its tangential stiffness has a minor effect. r coefficient of friction. Earles and Badi and Earles and Chambers used pin on disk systems in which two pins were acting on the disk to investigate and quantify the sprag-slip mechanism for squeal. The investigations performed consisted of examining how the damping influenced squeal. In these works, a linear stability analysis was performed on lumped parameter models of pin-disk systems in order to find the flutter boundaries in parameter space. After the constraints had been incorporated, these models were generally linear three-or five-degree-of-freedom systems. They found that damping in the pin assembly (corresponding to damping of the brake pad assembly in a disk brake) could enlarge the unstable regions under certain circumstances, while disk damping always reduced these regions.