Estimation of the Technical State of Automotive Disc Brakes Using Fuzzy Logic

According to existing studies the phenomena that occur in the exploitationof the braking system are very complex and an analytical mathematical modelingof braking process it is difficult to be developed [1]. Since these phenomena are alsocharacterized by some uncertainties, a fuzzy logic approach has been employed in thisresearch for the estimation of technical state of the disc brakes. Their technical statewas expressed through the thickness variation, which was used as the output linguisticvariable. The vibrations and temperature of the disc brakes were used as the inputlinguistic variables. The fuzzy decision system for the estimation of technical stateof the disc brakes has been implemented with the Fuzzy Logic Toolbox of theMatlab software, which can be employed to determine if the thickness of the discbrakes becomes smaller than the limit value prescribed by the manufacturer

STUDY REGARDING THE CAR BRAKE DISC TEMPERATURE VARIATION DURING THE LENGTHY BRAKING

When a car descends a slope with a great length, the thermal stresses resulting from contact between the brake discs and brake pads, there is possible to exceed the maximal limits of the materials resistance, resulting the rapid wear, decreasing the performance of braking or the loss control of movement and the road accidents are producing. The study refers to establishment the dependence between the braking intensity and time when the temperature achieves a the maximum limit on the surface of the car brake disc which descends a slope with constant speed so that the material is not affected or the brake pads

STUDIES ABOUT EMISSIVITY VARIATION DEPENDING ON THE TEMPERATURE FOR CAR BRAKE DISC

The temperature control of automotive brake discs during operation is a difficult process because they have shiny metallic surfaces moving rotational contact with fixed brake pads and different temperature gradients. The instrument used for measuring the temperature, in this case is the thermal camera, but requires precise calibration for the emissivity of the material being analyzed and the influence of environment. The study refers to changes depending on the temperature of thermal emissivity of the material disc brake car, both in static and in dynamic regime and determining analytical relationships to estimate this variation acceptable accuracy

Studies About Reflected Temperature Variation for the Car Brake Disc

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STUDY REGARDING THE CAR BRAKE DISC TEMPERATURE VARIATION DURING THE LENGTHY BRAKING

When a car descends a slope with a great length, the thermal stresses resulting from contact between the brake discs and brake pads, there is possible to exceed the maximal limits of the materials resistance, resulting the rapid wear, decreasing performance of braking or the loss control of movement and the road accidents are producing. The study refers to establishment the dependence between the braking intensity and time when the temperature achieves a maximum limit on surface of the car brake disc which descends a slope with constant speed so that the material is not affected or the brake pads