IEMEK Journal of Embedded Systems and Applications (대한임베디드공학회논문지)

Institute of Embedded Engineering of Korea (대한임베디드공학회)
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Safe Adaptive Headlight Controller with Symmetric Angle Sensor Compensator for Functional Safety Requirement

기능 안전성을 위한 대칭형 각도센서 보상기에 기반한 안전한 적응형 전조등 제어기의 설계

  • Received : 2015.07.18
  • Accepted : 2015.09.11
  • Published : 2015.10.31
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Abstract

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.

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References

  1. G. Leen, H. Donal, "Expanding automotive electronic systems," IEEE Computer Vol. 35, No. 1, pp. 88-93, 2002 https://doi.org/10.1109/2.976923
  2. C.V. Briciu, I. Filip, F. Heininger, "A new trend in automotive software: AUTOSAR concept," Proceedings of IEEE 8th International Symposium on Applied Computational Intelligence and Informatics, pp. 251-256, 2013.
  3. S.J. Oh, "A practical approach of SysML with Agile methods for ISO26262 and AUTOSAR," Proceedings of KSAE 2014 Annual Conference and Exhibition, pp. 648-655, 2014 (in Korean).
  4. L. Feng, H.U. Fengjian, "A comprehensive survey of vision based vehicle intelligent front light system," international journal on smart sensing and intelligent system Vol. 7, No. 2, pp. 701-723, 2014.
  5. D.H. Kim, "Study of Optimized Tuning in Full AFLS Head Lamps," Proceedings of the FISITA 2012 World Automotive Congress, Vol. 8, pp. 1719-1731, 2012.
  6. P.V. Adhav, S.A. Shaikh, "Adaptive Front Lighting System Using CCD," IOSR Journal of Electronics and Communication Engineering, Vol. 9, No. 5, pp. 20-25, 2014. https://doi.org/10.9790/2834-09532025
  7. System Application Engineering/MCU, Automotive Adaptive Front-lighting System Reference Design, TEXAS INSTRUMENTS, SPRUHP3, 2013.
  8. H.K. Kim, H.Y. Jung, J.H. Park, "Vehicle Detection for Adaptive Head-Lamp Control of Night Vision System," IEMEK J. Embed. Sys. Appl., Vol, 6, No. 1, pp. 8-15, 2011 (in Korean).
  9. Rules on vehicle safety standards, Ministry of Land, Infrastructure and Transport, 2010 (in Korean).
  10. S.W. Oh, J.H. Cho, D.K. Byeon, J.H. Joo, "A Study on Swivel Angle of Dynamic Bending Light," Proceedings of KSAE Spring Conference, Vol. 4, pp. 2151-2157, 2007 (in Korean).
  11. H.S. Lee, B.D. Kang, H.G. Kim, Y.T. Choi, J.H. Hwang, "A Study on Optimum Swivel Angle of AFLS Headlamps Considering Various Road Curvatures," Proceedings of KASE Spring Conference, Vol. 3, pp. 1434-1439, 2006 (in Korean).
  12. K. Ishiguro, Y. Yamada, "Control technology for bending mode AFS," SAE Technical paper No. 2004-01-0441, 2004.
  13. http://www.dspace.com/en/pub/home/products/hw/micautob.cfm

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  1. Safe Adaptive Headlight Controller with Symmetric Angle Sensor Compensator Using Steering-swivel Angle Lookup Table vol.24, pp.1, 2016, https://doi.org/10.7467/KSAE.2016.24.1.112