Circuit Design and Fusion Signal Processing Based on Double Uncertain Control for Wheel Speed Sensor of Electromechanical-Braking System

Electro-Mechanical-Braking (EMB) system is an important safe component of intelligent vehicles. Wheel speed sensor is the essential basic sensor of intelligent vehicle. The stable wheel speed signal is the key factor to realize EMB control. Hence, a new type of circuit and fusion signal processing (FSP) based on double uncertain control (DUC) is proposed, which solves the effective signal screening and signal fluctuation problem in traditional process system of wheel speed sensor. The wheel speed processing circuit includes an adjustable voltage regulator supply module (RSM) and signal processing module (SPM). On the basis of the circuit, FSP is designed, which can reduce the sensitivity of wheel speed signal to environmental noise to get a stable signal. Both simulation and experimental results show that this method processes the intelligent wheel speed signal effectively, the speed error of FS method is 39.8% of the traditional method, improves the stability of wheel speed signal and ensure the basic braking function of EMB.