International Journal of Internet, Broadcasting and Communication

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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On the Ensuring Safety and Reliability through the Application of ISO/PAS 21448 Analysis and STPA Methodology to Autonomous Vehicle

  • Kim, Min Joong (Department of Systems Engineering, Ajou University) ;
  • Choi, Kyoung Lak (Automotive Engineering Service Team, DNV GL Business Assurance Korea) ;
  • Kim, Joo Uk (Advanced Logistics System Research Department, Korea Railroad Research Institute) ;
  • Kim, Tong Hyun (CanLab Co., LTD.) ;
  • Kim, Young Min (Department of Systems Engineering, Ajou University)
  • Received : 2021.07.27
  • Accepted : 2021.08.06
  • Published : 2021.08.31
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Abstract

Recently, the use of electric and electronic control systems is increasing in the automobile industry. This increase in the electric and electronic control system greatly increases the complexity of designing a vehicle, which leads to an increase in the malfunction of the system, and a safety problem due to the malfunction is becoming an issue. Based on IEC 61508 relating to the functional safety of electrical/electronic/programmable electronics, the ISO 26262 standard specific to the automotive sector was first established in 2011, and a revision was published in 2018. Malfunctions due to system failure are covered by ISO 26262, but ISO/PAS 21448 is proposed to deal with unintended malfunctions caused by changes in the surrounding environment. ISO 26262 sets out safety-related requirements for the entire life cycle. Functional safety analysis includes FTA (Fault Tree Analysis), FMEA (Failure Mode and Effect Analysis), and HAZOP (Hazard and Operability). These analysis have limitations in dealing with failures or errors caused by complex interrelationships because it is assumed that a failure or error affecting the risk occurs by a specific component. In order to overcome this limitation, it is necessary to apply the STPA (System Theoretic Process Analysis) technique.

Keywords

Acknowledgement

This work was supported by a grant from R&D program of the Korea Evaluation Institute of Industrial Technology (20014470)

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