A methodology for the determination of dynamic instabilities in a car discbrake

The dynamics of a car disc brake system is investigated by a combined analy tical and numerical method. The disc is rotated past the stationary pads an d calliper in sliding friction at constant speed. The modal data of the dis c are obtained by means of modal testing whereby a dynamic model for the di sc is derived based on the thin plate theory. Then the pads, calliper and m ounting are analysed by means of the finite element method. Finally the equ ations of motion for the whole disc brake system are established through th e interfaces between the pads and the disc. The stability of the vibrating system is studied by the method of state space.