tailieunhanh - Design and implementation of an EPB diagnostic

This paper describes an EPB that consists of hardware to perform self-diagnostics after defining the DTC. The reliability of software is improved by autocode generating source code using variable tools. As the size of DTC increases, it accordingly becomes more complex. | Journal of Automation and Control Engineering Vol. 3, No. 4, August 2015 Design and Implementation of an EPB Diagnostic Donghoon Ban, Taeyoung Lee, and Sungho Jin DGIST/Robotics Research Division, Daegu, Korea Email: {dhban, tylee, sungho}@ Abstract—The parking brake system fulfills a vehicle’s parking function. The EPB system uses a motor that requires a self-diagnostic function for reliability. Reliability of the EPB is ensured by monitoring the status of the electric module and motor. This paper describes an EPB that consists of hardware to perform self-diagnostics after defining the DTC. The reliability of software is improved by autocode generating source code using variable tools. As the size of DTC increases, it accordingly becomes more complex. The EPB therefore uses a multiplexer because it requires many A/D ports. The EPB defines 23 DTC. The selfdiagnostic function performs well and detects errors when the EPB checks the performance depending on the test conditions. with using CAN DB (Can database) and CDD (CAN Diagnostic Database). The EPB has reliability by automatically generating source code using Vector’s Geny [9]-[10]. Index Terms—EPB(electronic parking brake) diagnostic, reliability, fault, DTC(diagnostic trouble code) I. INTRODUCTION Figure 1. Software autocode generation block diagram (CANdelaStudio manual) The parking brake system of vehicles fulfills a parking function. The EPB (Electric Parking Brake) system of a vehicle has a brake caliper that operates the brake pad. But the EPB system may not perform the parking function precisely because of the external environment and internal errors of the software module. The reliability of the EPB system’s parking function is ensured by monitoring the motor status and checking the status of the electric module continuously [1]-[4]. Accordingly, the EPB system requires functions for self-monitoring such as diagnostic capabilities. In this paper, an EPB system is designed and .