Modeling the speed measuring chain in ABS braking system

The braking system is the most critical system of the vehicle. Maintenance and proper operation are vital for us, for this reason, and since the 70s, a growing number of scientists have been interested in the braking systems. Currently the braking system has become a mechatronic system. It consists of a hydraulic part, a mechanical part and an electronic part. Indeed, while the car is rolling, the system continuously monitors each wheel by means of a wheel speed sensor and an electronic calculator which will be displayed on the car's dashboard to inform the driver. This communication gives an idea about the functioning of an ABS type system which is an “anti blocking system”. It proposes a model based on two methods which are: the first method is functional analysis; the second is the bond graph of the measurement section and the speed display, and then shows the simulation of these models by the Matlab Simulink software and 20 Sim.