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Showing papers on "Control reconfiguration published in 1973"


Patent
15 Mar 1973
TL;DR: In this paper, a system including duplicate copies of central processors and storage means for switching active copies of a central processor and primary copies of instruction through all combinations to find a working combination is described.
Abstract: A system is disclosed including duplicate copies of central processors and storage means for switching active copies of central processor and primary copies of instruction through all combinations to find a working combination The reconfiguration may be effected either through a fixed wired recovery control circuit which changes state in predetermined sequence or, alternatively, under program control

27 citations


Journal ArticleDOI
09 Dec 1973
TL;DR: The design of a fault-tolerant associative processor, which uses some of the techniques discussed previously, is presented.
Abstract: Recent advances in computer technology have made the design of large and very flexible associative processors possible. Such systems are extremely complex and must be adequately protected against failures if they are to be used in critical application areas such as air traffic control or for performing control functions in fault-tolerant computers. This paper summarizes the results of a study which has indicated the techniques that are applicable in the design of fault tolerant associative processors. Associative processors are divided into four classes of fully parallel, bit-serial, word-serial, and block-oriented systems. A technique for modularizing the design of an associative processor is given. The detection of errors within modules is discussed for the four classes mentioned above. Several schemes for reconfiguration are discussed which allow us to establish an appropriate inter-communication pattern after replacing the faulty module by a spare. The design of a fault-tolerant associative processor, which uses some of the techniques discussed previously, is presented.

8 citations


Journal ArticleDOI
George A. Anderson1
09 Dec 1973
TL;DR: This paper describes the interconnection scheme devised for an advanced Air Force system concept called Distribution Processor/Memory (DP/M) in which topologically irregular networks of small computers are used to perform avionics processing.
Abstract: This paper describes the interconnection scheme devised for an advanced Air Force system concept called Distribution Processor/Memory (DP/M) in which topologically irregular networks of small computers are used to perform avionics processing. The interconnection scheme involves the use of a combination of global and point-to-point busses to handle message traffic in predominantly homogeneous systems of from 5 to 20 computers. The major features of the scheme are the use of biphase bit-serial transmission, associatively addressed messages, and a method for reconfiguration of the point-to-point communications paths under program control. It is expected that the scheme may have general applicability to other distributed processing systems, particularly other real-time systems employing limited-capability processors.

6 citations


Journal ArticleDOI
TL;DR: Most large-scale computer and control systems used in such critical applications as airline ticket reservations, air traffic controllers, and chemical processing plants are provided with redundant elements, automatic reconfiguration, or other safeguards to assure that data processing is not interrupted by computer element failures, but these systems are still subject to commercial power system problems.
Abstract: When guaranteed real-time access and reaction are required of a critical system, an uninterruptible power system is a must. Most large-scale computer and control systems used in such critical applications as airline ticket reservations, air traffic controllers, and chemical processing plants are provided with redundant elements, automatic reconfiguration, or other safeguards to assure that data processing is not interrupted by computer element failures. But despite such precautions, these systems are still subject to commercial power system problems. Regulating transformers and similar devices can help a data system coast over short power transients but, for full protection, an uninterruptible power system (UPS) is needed.

1 citations