The increasing complexity and consequent increased requirement for reliability of computer control systems are discussed. Circumventing partial failures by partial shutdown and the manual intervention of an operator is described. It is noted that many fault-tolerant computer systems already developed were developed as special computer systems with complicated architecture, or as the combination of computer resources coupled with bus features instead of using the ordinary computer systems. However, the fault-tolerant computer system that is the subject of this paper consists essentially of three symmetrically connected "off-the-shelf" computers. Two of the computers are connected by a dual system controller for on-line dual processing. The third computer is for standby. To protect the on-line system, a status register is used for the configuration control hardware. Degradation techniques in software and hardware are introduced to prevent the system from stoppage. The actual running record shows 99.99 percent operating availability for three years in the command and control system for Shinkansen (Japanese National Railway's bullet train). The system, call COMTRAC, COMputer-aided TRAffic Control system, is described in detail.

  • Corporate Authors:

    Institute of Electrical and Electronics Engineers (IEEE)

    3 Park Avenue, 17th Floor
    New York, NY  United States  10016-5997
  • Authors:
    • Ihara, H
    • Fukuoka, K
    • Kubo, Y
    • Yokota, S
  • Conference:
  • Publication Date: 1978-10

Media Info

  • Pagination: p. 1160
  • Serial:
    • Volume: 66
    • Issue Number: 10

Subject/Index Terms

Filing Info

  • Accession Number: 00190272
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 26 1979 12:00AM