An analysis and design of a pseudorandom pattern generator, (PRPG), based on a linear recurrence, for built-in self-test (BIST) boundary scan design is presented. The authors present for the case when r>or=s, a des...
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An analysis and design of a pseudorandom pattern generator, (PRPG), based on a linear recurrence, for built-in self-test (BIST) boundary scan design is presented. The authors present for the case when r>or=s, a design of an s-stage PRPG capable of producing 2/sup s/-1 distinct r-bit patterns within 2/sup s/-1 clock pulses independent of the hardware realization of the PRPG. For the case when r >
作者：
SWALLOM, DWSADOVNIK, IGIBBS, JSGUROL, HNGUYEN, LVVANDENBERGH, HHDaniel W. Swallomis the director of military power systems at Avco Research Laboratory
Inc. a subsidiary of Textron Inc. in Everett Mass. Dr. Swallom received his B.S. M.S. and Ph.D. degrees in mechanical engineering from the University of Iowa Iowa City Iowa in 1969 1970 and 1972 respectively. He has authored numerous papers in the areas of power propulsion and plasma physics and currently is a member of the Aerospace Power Systems Technical Committee of the AIAA. Dr. Swallom has directed various programs for the development of advanced power generation systems lightweight power conditioning systems and advanced propulsion systems for marine applications. His previous experience includes work with Odin International Corporation Maxwell Laboratories Inc. Argonne National Laboratory and the Air Force Aero Propulsion Laboratory. Currently Dr. Swallom is directing the technical efforts to apply magnetohydrodynamic principles to a variety of propulsion and power applications for various marine vehicles and power system requirements respectively. Isaac Sadovnikis a principal research engineer in the Energy Technology Office at Avco Research Laboratory
Inc. a subsidiary of Textron Inc. He received his B.S. in engineering (1974) B.S. in physics (1975) M.S. in aeronautics and astronautics (1976) and Ph.D. in physics of fluids (1981) at the Massachusetts Institute of Technology. Dr. Sadovnik has been involved in research work funded by DARPA concerning the use of magnetohydrodynamics for underwater propulsion. He has built theoretical models that predict the hydrodynamic behavior of seawater flow through magnetohydrodynamic ducts and their interaction with the rest of the vehicle (thrust and drag produced). In addition Dr. Sadovnik has been involved in research investigations geared toward the NASP program concerning the use of magnetohydrodynamic combustion-driven accelerator channels. Prior to joining Avco Dr. Sadovnik was a research assistant at MIT where he conducted experimental and
Magnetohydrodynamic propulsion systems for submarines offer several significant advantages over conventional propeller propulsion systems. These advantages include the potential for greater stealth characteristics, in...
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Magnetohydrodynamic propulsion systems for submarines offer several significant advantages over conventional propeller propulsion systems. These advantages include the potential for greater stealth characteristics, increased maneuverability, enhanced survivability, elimination of cavitation limits, greater payload capability, and the addition of a significant emergency propulsion system. These advantages can be obtained with a magnetohydrodynamic propulsion system that is neutrally bouyant and can operate with the existing submarine propulsion system power plant. A thorough investigation of magnetohydrodynamic propulsion systems for submarine applications has been completed. During the investigation, a number of geometric configurations were examined. Each of these configurations and mounting concepts was optimized for maximum performance for a generic attack class submarine. The optimization considered each thruster individually by determining the optimum operating characteristics for each one and accepting only those thrusters that result in a neutrally buoyant propulsion system. The results of this detailed optimization study show that the segmented, annular thruster is the concept with the highest performance levels and greatest efficiency and offers the greatest potential for a practical magnetohydrodynamic propulsion system for attack class submarines. The optimization study results were used to develop a specific point design for a segmented, annular magnetohydrodynamic thruster for an attack class submarine. The design point case has shown that this thruster may be able to provide the necessary thrust to propel an attack class submarine at the required velocity with the potential for a substantial acoustic signature reduction within the constraints of the existing submarine power plant and the maintenance of neutral buoyancy. This innovative magnetohydrodynamic propulsion system offers an approach for submarine propulsion that can be an important contributio
Board-level diagnostic techniques by signature analysis based on single-error-correcting Hamming codes over GF(2/sup M/) (where M is the number of outputs per chip) are presented. Two techniques are considered: the sp...
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Board-level diagnostic techniques by signature analysis based on single-error-correcting Hamming codes over GF(2/sup M/) (where M is the number of outputs per chip) are presented. Two techniques are considered: the space-time compressor technique for the case when responses from N chips on the board are wired to the compressor; and the time compressor technique for the case when test responses from each chip are transferred to the compressor via system bus. Assuming a single-faulty-chip model, a faulty chip on the board under test is located by an analysis of the relationship between the distortions in the obtained signatures. Both techniques for board-level diagnosis require less hardware than the straightforward diagnostic techniques using a built-in signature analyzer for every chip or selective testing of each chip via the system bus, hence offering an efficient approach for a design of a built-in-self-test board for for manufacturing testing.< >
作者：
DONAHUE, JCMCMAHON, EJNELSON, LWCommander John C. Donahue
USN:is the Deputy Technical Director for NAVSEA PMS 399 the FFG 7 class Acquisition Project Office. In addition he is the FFG 7 class Fin Stabilizer System Program Manager. Cdr. Donahue is an Engineering Duty Officer and Surface Warfare Officer who holds a BS in marine engineering from the California Maritime Academy a BS in business administration and an MS in material management from the Naval Postgraduate School. He is a designated Weapons Systems Acquisition Manager. Cdr. Donahue's sea service includes three tours culminating as chief engineer in USSFarragut (DLG-6) during that ship's complex overhaul as the DLG pilot ship for the 1200 PSI improvement program. Significant shore duty includes the Philadelphia Naval Shipyard where he served as theBelknapproject officer during that ship's repair restoration and modernization following its collision with USSJohn F. Kennedy (CV-67) Assistant Sixth Fleet Maintenance Officer and the Naval Research Laboratory. Cdr. Donahue was the charter president of the ASNE Section at the Naval Postgraduate School. Edward J. McMahon:is founder and President
Reliability Sciences Incorporated (RSI) and has been supporting NAVSEA on the FFG 7 Class fin stabilizer system procurement since 1977. Mr. McMahon has a BSME from New Jersey Institute of Technology and has done graduate work in electrical engineering operations research and engineering administration at New Jersey Institute of Technology Seton Hall University University of Alabama and George Washington University. He has authored and presented various papers on reliability and electrostatic discharge control and coauthored a book Electrostatic Discharge Control — Successful Methods for Microelectronics Design and Manufacturingpublished by Hayden Publishing Company 1983. Mr. McMahon is a registered Professional Engineer and listed in Who's Who 1977 1978 1982 and 1983. Louis W. Nelson:is an electrical engineer with the NAVSEA Surface Ship Control and Hydraulic System Branch where he ha
This paper discusses the new fin stabilizer system developed for the FFG 7 class ships. The paper includes: a brief history of fin stabilizers, the advantages of fin stabilizers on Navy combatants, brief theory of sys...
This paper discusses the new fin stabilizer system developed for the FFG 7 class ships. The paper includes: a brief history of fin stabilizers, the advantages of fin stabilizers on Navy combatants, brief theory of system operation, the approaches used in system development, and an up to date program status. This paper furthers Nelson and McCallum's paper [1] which addresses the infancy of the FFG 7 fin stabilizer system development program.
作者：
David G. SlearRobert L. LongJames D. JonesF. S. GiacobbeGPU Nuclear
Parsippany N.J. 07054 In 1974
David Slear joined General Public Utilities Nuclear Corp. where his responsibilities included the design review of components for new nuclear power plants and troubleshooting component failures both in nuclear power and fossil plants in the GPU System. In 1978 he was promoted to Preliminary Engineering Manager and was responsible for coordinating the preparation of design criteria for several coal-fired plants and combustion turbines to be installed throughout the 1980s. Immediately following the TMI-2 accident
he was placed in charge of coordinating the establishment of criteria and the design for numerous modifications that were perceived to be required in order to maintain core cooling and a stable safe shutdown condition for the TMI-2 reactor. Subsequently he was promoted to Manager of TMI Engineering Projects which involved establishing the criteria and coordinating the engineering for the numerous modifications required to TMI-1 as a result of the Lessons Learned from the accident at TMI-2. He holds a B.S. Degree in Mechanical Engineering and an M.S. Degree in Mechanical Engineering.Since April 1982
Robert L. Long has been Vice President and Director of the Nuclear Assurance Division of the GPU Nuclear Corp. This includes responsibilities for the Quality Assurance Department the Nuclear Safety Assessment Department the Training & Education Directorate and the Emergency Preparedness Department. Joining GPU in 1978 he has been actively involved with Three Mile Island recovery and restart activities since the spring of 1979. From February 1980 through March 1982 he served as Director–Training & Education for GPU Nuclear. He holds the B.S. degree in Electrical Engineering from Bucknell University and the M.S.E. and Ph.D. degrees in Nuclear Engineering from Purdue University. He has written numerous publications and has presented lectures on “energy and the environment” issues all over the United States and in Southeast Asia. Since joining GPU Nuclear Corpo
The MK 92 Fire Control system (FCS) & a new, integrated, highly reliable and light-weight U.S. Navy Fire Control system for missile and gun control. This system, which is in production for the FFG, PCG, PGG and PH...
The MK 92 Fire Control system (FCS) & a new, integrated, highly reliable and light-weight U.S. Navy Fire Control system for missile and gun control. This system, which is in production for the FFG, PCG, PGG and PHM Ship Classes, provides the detection and automation required for modern naval warfare. Search radar data & presented at a very high rate at the operator's console, a highly integrated man-machine interface. Utilization of monopulse and “track-while-scan” techniques result in multiple target tracking capability. The system console(s) offer a self-contained command and control capability and, in addition, standard digital computer channels provide the versatile interface with the ship's command and control, integrating the complete engagement process. Error cancellation techniques are employed to obtain high performance accuracy even under severe environmental conditions. The low manning requirement for both operation and maintenance is a key system attribute for all applications. Comprehensive “at-sea” evaluations, performed by the U.S. Navy, demonstrated successful system operation in all modes of surveillance, multi-target tracking and simultaneous missile and gun engagements. The “at-sea” performance record of the FCS MK 92 was cited by the Chief of Naval Operations to have established new standards for Naval Surface Weapons systems.
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