전자제어 주차브레이크 시스템의 모델기반 고장검출 방법

The EPB system is actually designed to get the braking force by the electric motor through a driver's simple switch operation, not the existing system that conventional parking brake gets braking force through a driver's power. The EPB system is composed of ECU, PWM(Pulse Width Modulation) driver, DC motor and actuator. The ECU decides a brake's apply/release according to a driver's input and controls command to generate desired braking force. The force sensor value plays the most important role in supplying enough braking force to EPB system. If the force sensor is in a fault, it can give vehicle safety a serious danger since enough braking force is not supplied. Therefore, it is necessary to develop a model based fault detection method with high reliability to detect an abnormal signal fault. It can't detect by the existing on-line sensor monitoring method.