Ship Em Design Technology

Li, S.T.; Logan, J. C.; Rockway, J. W.

doi:10.1111/j.1559-3584.1988.tb01498.x

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…The challenge to the integration of antennas in a topside design is that (Li et al 1988): ■ All factors influencing an antenna system performance must be identified before an antenna site can be selected.…”

Section: Technical Approachmentioning

confidence: 99%

EM Design Technology for Topside Antenna System Integration

Rockway

Russell³

et al. 2001

Naval Engineers Journal

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Topside Antenna System Integration is one of the most important technology challenges for future Navy ship designs. This is due to dual mission requirements of increasing capability while reducing the overall signatures of a ship. Often these two goals are in conflict. Because of these conflicting design issues, new and innovative techniques are required. In order to maximize performance, accurate numerical modeling and simulation are required. By using modeling and simulation tools a thorough investigation of system performance can be obtained. This information can then be used to make informed design decisions. This paper describes the design procedure and engineering tools used for Navy topside antenna system integration. The approach is an iterative process by which topside designs and antenna system architectures can be analyzed and performance assessed.

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Section: Technical Approachmentioning

confidence: 99%

EM Design Technology for Topside Antenna System Integration

Rockway

Russell³

et al. 2001

Naval Engineers Journal

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“…(6) It can preserve useful knowledge, manage the data bases, remember similar ship experiences, and never overlook any relevant rules. (7) It can consistently produce solutions at the same level. The permanence is not related to its use.…”

Section: Critical Design Features Of Cleermentioning

confidence: 99%

CLEER: An AI System Developed to Assist Equipment Arrangements on Warships

Zhou¹,

Silverman²,

Simkol³

1989

Naval Engineers Journal

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This paper describes a modularized AI system being built to help improve electromagnetic compatibility (EMC) among shipboard topside equipment and their associated systems. CLEER is intended to act as an easy to use integrator of existing expert knowledge and pre‐existing data bases and large scale analytical models. Due to these interfaces; to the need for portability of the software; and to artificial intelligence related design requirements (such as the need for spatial reasoning, expert data base management, model base management, track‐based reasoning, and analogical (similar ship) reasoning) it was realized that traditional expert system shells would be inappropriate, although relatively off‐the‐shelf AI technology could be incorporated. In the same vein, the rapid prototyping approach to expert system design and knowledge engineering was not pursued in favor of a rigorous systems engineering methodology. The critical design decisions affecting CLEER's development are summarized in this paper along with lessons learned to date all in terms of “how,” “why,” and “when” specific features are being developed.

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“…NEC includes the NEC-method of moments (NEC-MoM), NEC-basic scattering, and NEC-reflector antenna codes (Li, et al, 1988). All these codes have been validated and extensively documented.…”

Section: Numerical Electromagnetic Codementioning

confidence: 99%

“…This section describes the design procedure used for Navy shipboard exterior radio frequency (RF) communication system design (Li, Logan, & Rockway, 1988). The approach is an iteration process by which candidate RF system designs can be analyzed to determine their relative desirability.…”

Section: Ship Em Design Proceduresmentioning

confidence: 99%

Parallel Processing Applied to Computational Electromagnetics

Russell¹,

Rockway²

1991

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MA SUMMARY OBJECTIVETo apply parallel processing techniques to a computational electromagnetic code and show that high-performance computing can improve the utility and efficiency of techniques used in ship electromagnetic designs. RESULTS" Efficient parallel matrix filling, factoring, and solving routines were developed, implemented, and evaluated. " The performances of the parallel matrix factoring and solving routines were independent of the structure being analyzed, whereas the performance of the parallel matrix filling routine was found to be very dependent on the structure being analyzed. " Several different techniques for mapping the matrix columns onto the processors were implemented and evaluated. * Efficiencies for all parallel algorithms increased as the size of the matrix being solved increased. " Performance comparisons were made between a MicroVax, the four transputer array, and the Convex Model C-220 mini-supercomputer. PAYOFFSSeveral payoffs have resulted, or will result, from the work done on this lED project: " A computer platform now exists for the efficient transition of computational electromagnetics to high-performance computing. The transputer array can be used to initiate parallelizing an existing computer code.

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Ship Em Design Technology

Cited by 11 publications

References 6 publications

EM Design Technology for Topside Antenna System Integration

EM Design Technology for Topside Antenna System Integration

CLEER: An AI System Developed to Assist Equipment Arrangements on Warships

Parallel Processing Applied to Computational Electromagnetics

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