A study on the control system with dual structure to enhance its reliability

제어 시스템의 신뢰도 향상을 위한 이중화 구조 연구

  • 박세화 (한국과학기술원 전기 및 전자공학과) ;
  • 문봉채 (한국과학기술원 전기 및 전자공학과) ;
  • 김병국 (한국과학기술원 전기 및 전자공학과) ;
  • 변증남 (한국과학기술원 전기 및 전자공학과)
  • Published : 1990.10.01


In this paper, a reliable control system structured with dual CPU modules and dual I/O modules is implemented as a means of achieving a highly reliable fault tolerant control system. For this, faults in the system modules are first examined, and a fault detection technique consisting of self diagnostic, comparison process, and exception processing is applied. Also reliability analysis is conducted for the discrete time Markov model with dual structure. It is shown quantitatively that the reliability is improved in the control system with dual structure in comparison with a system with single module structure.