Volume 38 Issue 1
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Article Navigation >  Journal of Shanghai University of Engineering Science  > 2024  >  38(1): 23-29
CAO Zijian, WU Changshui, CHEN Li. Research on safety redundancy of automotive EPS system based on functional safety[J]. Journal of Shanghai University of Engineering Science, 2024, 38(1): 23-29. doi: 10.12299/jsues.23-0108
Citation: CAO Zijian, WU Changshui, CHEN Li. Research on safety redundancy of automotive EPS system based on functional safety[J]. Journal of Shanghai University of Engineering Science, 2024, 38(1): 23-29. doi: 10.12299/jsues.23-0108
shu

Research on safety redundancy of automotive EPS system based on functional safety

doi: 10.12299/jsues.23-0108
  • 1.

    School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620,China

  • 2.

    Shanghai Hiro Automotive Technologies Co., Ltd., Shanghai 201800, China

  • Received Date: 2023-04-25
  • Publish Date: 2024-03-30
    Abstract
  • Electric power steering (EPS) system is a commonly used steering actuator for vehicles at present, and its failure will seriously affect the safety of drivers and passengers. A safety redundancy mechanism for the EPS system was established based on functional safety standards. Based on ISO26262, the EPS system was studied. Through the item definition, hazard analysis and risk assessment, the safety goal and functional safety requirements of the system were obtained and allocated. The architecture and fault-tolerant mechanism of EPS system were designed to improve the security of the system. Finally, the designed safety redundancy mechanism was tested on the bench. The results show that the system can achieve the expected response and meet the functional safety goal under the condition of fault injection such as unilateral bridge driver IC fault, unilateral motor position sensor fault and bilateral motor position sensor fault, which verifies the effectiveness of the designed safety redundancy mechanism.
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    • References(15)
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