• 제목/요약/키워드: AFLS

검색결과 3건 처리시간 0.018초

기능 안전성을 위한 대칭형 각도센서 보상기에 기반한 안전한 적응형 전조등 제어기의 설계 (Safe Adaptive Headlight Controller with Symmetric Angle Sensor Compensator for Functional Safety Requirement)

  • 윤지애;인멍디;안중현;조정훈;박대진
    • 대한임베디드공학회논문지
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    • 제10권5호
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    • pp.297-305
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    • 2015
  • AFLS (Adaptive front lighting System) is being applied to improve safety in driving automotive at night. Safe embedded system for controlling head-lamp has to be tightly designed by considering safety requirement of hardware-dependent software, which is embedded in automotive ECU(Electronic Control Unit) hardware under severe environmental noise. In this paper, we propose an adaptive headlight controller with newly-designed symmetric angle sensor compensator, which is integrated with ECU-based adaptive front light system. The proposed system, on which additional backup hardware and emergency control algorithm are integrated, effectively detects abnormal situation and restore safe status of controlling the light-angle in AFLS operations by comparing result in symmetric angle sensor. The controlled angle value is traced into internal memory in runtime and will be continuously compared with the pre-defined lookup table (LUT) with symmetric angle value, which is used in normal operation. The watch-dog concept, which is based on using angle sensor and control-value tracer, enables quick response to restore safe light-controlling state by performing the backup sequence in emergency situation.

조향각-회전각 룩업테이블을 이용한 대칭형 각도센서 보상기를 가지는 안전한 적응형 전조등 제어기의 설계 (Safe Adaptive Headlight Controller with Symmetric Angle Sensor Compensator Using Steering-swivel Angle Lookup Table)

  • 윤지애;안중현;인멍디;조정훈;박대진
    • 한국자동차공학회논문집
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    • 제24권1호
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    • pp.112-121
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    • 2016
  • AFLS (Adaptive front lighting system) is being applied to improve safety in driving automotive at night. Safe embedded system design for controlling head-lamps is required to improve noise robust ECU hardware and software simultaneously by considering safety requirement of hardware-dependent software under severe environmental noise. In this paper, we propose an adaptive headlight controller with a newly-designed symmetric angle sensor compensator, especially based on the proposed steering-swivel angle lookup table to determine whether the current controlling target is safe. The proposed system includes an additional backup hardware to compare the system status and provides safe swivel-angle management using a controlling algorithm based on the pre-defined lookup table (LUT), which is a symmetric mapping relationship between the requested steering angle and expected swivel angle target. The implemented system model shows that the proposed architecture effectively detects abnormal situations and restores safe status of controlling the light-angle in AFLS operations under severe noisy environment.

모델 기반 평가 방법을 이용한 평가 항목 생성에 관한 연구 (A Study on Evaluation Item Creation using Model-Based Testing)

  • 손인식;조정훈;한갑수;백윤흥;이진용
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2013년도 추계학술발표대회
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    • pp.952-954
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    • 2013
  • 모델 기반 평가 방법은 블랙박스 테스트의 한 종류로 평가 항목의 생성과 평가 항목의 실행이 모델 기반 평가 도구를 통하여 자동으로 이루어지는 평가 방법이다. 자동차 지능형 헤드램프의 AFLS/ADB를 대상으로 무작위 평가 생성 기법과 T-method 평가 생성 기법을 이용 하여 평가 항목을 생성하고 비교해 보았으며 Vector CANoe를 사용하여 시뮬레이션을 구성하고 CAPL을 이용하여 스크립트를 작성하고 평가하여 나온 평가 보고서를 확인 하였다.