Integration and automatic fault location techniques in large digital data systems

Abstract

A digital computer, if used with proper programming techniques, can be a powerful tool during the processes of physical integration of complex digital data processing systems. After system integration, as such, has been completed the same techniques may be used to provide performance monitoring and daily calibration status data for all or any part of a system. Investigation of such programming techniques during system integration of the Developmental Navy Tactical Data System (NTDS) at USNEL produced results which indicated the possibility of using the computer for automatic fault location in the system. Some progress has been made in this area, and a program which allows the NTDS computer to identify a failing logic card associated with its own memory logic and switching circuitry has been successfully demonstrated. The final objectives of this approach are to provide facilities to perform on line performance monitoring and automatic fault location, reduce to a minimum the external test equipment required for a system, and eliminate insofar as possible the high degree of training presently required in the system maintenance technician.