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차량 내 네트워크 통신의 기능안전성을 위한 하드웨어 기본 설계
곽현철(Hyun Chul Koag),안현식(Hyun-Sik Ahn) 대한전기학회 2017 전기학회논문지 Vol.66 No.9
This paper presents a basic ECU(Electronic Control Unit) hardware development procedure for the functional safety of in-vehicle network systems. We consider complete hardware redundancy as a safety mechanism for in-vehicle communication network under the assumption of the wired network failure such as disconnection of a CAN bus. An ESC (Electronic Stability Control) system is selected as an item and the required ASIL(Automotive Safety Integrity Level) for this item is assigned by performing the HARA(Hazard Analysis and Risk Assessment). The basic hardware architecture of the ESC system is designed with a microcontroller, passive components, and communication transceivers. The required ASIL for ESC system is shown to be satisfied with the designed safety mechanism by calculation of hardware architecture metrics such as the SPFM(Single Point Fault Metric) and the LFM(Latent Fault Metric).
ISO 26262에 부합한 능동형 안전벨트 제어 시스템의 하드웨어 아키텍처 설계 및 검증
이준혁(Jun Hyok Lee),곽현철(Hyun Chul Koag),이경중(Kyung-Jung Lee),안현식(Hyun-Sik Ahn) 대한전기학회 2016 전기학회논문지 Vol.65 No.12
This paper presents a hardware development procedure of the ASB(Active Seat Belt) control system to comply with ISO 26262. The ASIL(Automotive Safety Integrity Level) of an ASB system is determined through the HARA(Hazard Analysis and Risk Assessment) and the safety mechanism is applied to meet the reqired ASIL. The hardware architecture of the controller consists of a microcontroller, H-bridge circuits, passive components, and current sensors which are used for the input comparison. The required ASIL for the control systems is shown to be satisfied with the safety mechanism by calculation of the SPFM(Single Point Fault Metric) and the LFM(Latent Fault Metric) for the design circuits.