Fuzzy-based control system in a motor vehicle for controlling a speed of the motor vehicle or a brake pressure of a brake of the motor vehicle

摘要

The present invention provides a fuzzy based control system in a motor vehicle for controlling a speed. The fuzzy-based control system includes a brake pressure measuring unit, a signal processing unit and a control unit. The brake pressure measuring unit is designed as a finite state machine to measure a current brake pressure of a brake of a wheel of the motor vehicle as a function of a trigger. The signal processing unit is designed to estimate a current adhesion value μ between a tire associated with the wheel and the current background based on the current brake pressure of the brake and further measured values. The estimation includes an inference based on fuzzy rules and fuzzyfication, and subsequently defuzzification of the inference. The control unit is designed to control a speed of the motor vehicle or the brake pressure of the brake based on the estimated actual adhesion value μ.