Estimation of the technical state of automotive disc brakes using fuzzy logic

Abstract

According to existing studies the phenomena that occur in the exploitation of the braking system are very complex and an analytical mathematical modeling of braking process it is difficult to be developed [1]. Since these phenomena are also characterized by some uncertainties, a fuzzy logic approach has been employed in this research for the estimation of technical state of the disc brakes. Their technical state was expressed through the thickness variation, which was used as the output linguistic variable. The vibrations and temperature of the disc brakes were used as the input linguistic variables. The fuzzy decision system for the estimation of technical state of the disc brakes has been implemented with the Fuzzy Logic Toolbox TM of the Matlab ® software, which can be employed to determine if the thickness of the disc brakes becomes smaller than the limit value prescribed by the manufacturer.