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기능 안전 설계/평가 프로세스(ISO 13849) 적용한 지게차용 변속기 제어 유닛(TCU) 개발과 H/W-S/W 레벨 및 실차 레벨 검증
백종희(J. H. Baek),김경수(K. S. Kim),조성진(S. J. Cho),정명길(M. K. Jung) 유공압건설기계학회 2022 유공압건설기계학회 학술대회논문집 Vol.2022 No.06
As the application of automation, intelligent technologies in construction equipment has been increased rapidly, nowadays functional safety regulation on the SRP/CS(Safety Related Parts of Control System) of fork-lift trucks become more strictly applied based on ISO 13849, EN 1175, etc. So, we applied functional safety principles in TCU(Transmission Control Unit) for industrial trucks and performed verification and validation in accordance with ISO 13849, for the first time in Korea. As a result, we developed TCU H/W with the PFHd of 0.392 × 10<SUP>-6</SUP>(1/h). We also conducted S/W tests such as static analysis for MISRA-C compliant rate, dynamic tests for white-box and black-box test, all of which are compliant to PLc/Category 2 or the higher level.