ON THE INFLUENCE OF MULTIPLE EQUILIBRIUM POSITIONS ON BRAKE NOISE

Brake noise, especially brake squeal, has been a subject of intensive research both in industry and academia for several decades. Nevertheless, the state art simulations does not provide predictive tool, extensive experimental investigations are still necessary to find an appropriate design. Actual focus on consideration nonlinearities which fact essential this phenomenon. Unfortunately, by far all relevant effects caused known. One these nonlinear that actual focuses is limit cycle behavior representing squeal. In contrast this, paper considers influence equilibrium position established while applying pressure. The elements brake, namely, carrier, caliper pad, highly elastically coupled allow multiple positions depending e.g. initial conditions transient application pressure frictional contact between pads disk may excite small amplitude self-excited vibrations around equilibrium, i.e. current establishes method corresponding setup, measure engaged components using optical 3D-measuring system. Subsequently, it demonstrated different can be same operation parameters decisive occurrence fact, certain result squeal others do parameters. Taking effect into have significant consequences design brakes as well simulation investigation