Institution
Rockwell Automation
Company•Milwaukee, Wisconsin, United States•
About: Rockwell Automation is a company organization based out in Milwaukee, Wisconsin, United States. It is known for research contribution in the topics: Automation & Control theory. The organization has 5567 authors who have published 7018 publications receiving 149045 citations.
Topics: Automation, Control theory, Signal, Component (UML), Voltage
Papers published on a yearly basis
Papers
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TL;DR: An hierarchy of uniformly high-order accurate schemes is presented which generalizes Godunov's scheme and its second- order accurate MUSCL extension to an arbitrary order of accuracy.
2,891 citations
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TL;DR: An efficient method for estimating cluster centers of numerical data that can be used to determine the number of clusters and their initial values for initializing iterative optimization-based clustering algorithms such as fuzzy C-means is presented.
Abstract: We present an efficient method for estimating cluster centers of numerical data. This method can be used to determine the number of clusters and their initial values for initializing iterative optimization-based clustering algorithms such as fuzzy C-means. Here we use the cluster estimation method as the basis of a fast and robust algorithm for identifying fuzzy models. A benchmark problem involving the prediction of a chaotic time series shows this model identification method compares favorably with other, more computationally intensive methods. We also illustrate an application of this method in modeling the relationship between automobile trips and demographic factors.
2,815 citations
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TL;DR: In this article, a phase-locked loop (PLL) system under distorted utility conditions is presented and a control model of the PLL system is developed and recommendations are made on tuning of this model specially for operation under common utility distortions such as line notching, voltage unbalance/loss, and frequency variations.
Abstract: Operation of a phase locked loop (PLL) system under distorted utility conditions is presented. A control model of the PLL system is developed and recommendations are made on tuning of this model specially for operation under common utility distortions such as line notching, voltage unbalance/loss, and frequency variations. The PLL is completely implemented in software without any filters. All analytical results are experimentally verified.
1,061 citations
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TL;DR: In this paper, the grain structure, dislocation density and second phase particles in various regions including the dynamically recrystallized zone (DXZ), thermo-mechanically affected zone (TMAZ), and heat-affected zone (HAZ) of a friction stir weld aluminum alloy 7050-T651 were investigated and compared with the unaffected base metal.
934 citations
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TL;DR: Friction stir welding (FSW) was used to weld 7075 T651 aluminum, an alloy considered essentially unweldable by fusion processes as discussed by the authors, which exposed the alloy to a short time, high-temperature spike, while introducing extensive localized deformation.
Abstract: Friction stir welding (FSW), a new welding technique invented at TWI, was used to weld 7075 T651 aluminum, an alloy considered essentially unweldable by fusion processes. This weld process exposed the alloy to a short time, high-temperature spike, while introducing extensive localized deformation. Studies were performed on these solid-state welds to determine mechanical properties both in the longitudinal direction, i.e., within the weld nugget, and, more conventionally, transverse to the weld direction. Because of the unique weld procedure, a fully recrystallized fine grain weld nugget was developed. In addition, proximate to the nugget, both a thermomechanically affected zone (TMAZ) and heat affected zone (HAZ) were created. During welding, temperatures remained below the melting point and, as such, no cast or resolidification microstructure was developed. However, within the weld nugget, a banded microstructure that influences room-temperature fracture behavior was created. In the as-welded condition, weld nugget strength decreased, while ductility remained high. A low-temperature aging treatment failed to fully restore T651 strength and significantly reduced tensile ductility. Samples tested transverse to the weld direction failed in the HAZ, where coarsened precipitates caused localized softening. Subsequent low-temperature aging further reduced average strain to failure without affecting strength. Although reductions in strength and ductility were observed, in comparison to other weld processes, FSW offers considerable potential for welding 7075 T651 aluminum.
864 citations
Authors
Showing all 5567 results
Name | H-index | Papers | Citations |
---|---|---|---|
Mercouri G. Kanatzidis | 152 | 1854 | 113022 |
Eric Horvitz | 133 | 914 | 66162 |
Terence G. Langdon | 117 | 1158 | 61603 |
Bernard Wood | 108 | 630 | 38272 |
David R. Clarke | 90 | 553 | 36039 |
Warren M. Farnworth | 85 | 553 | 23609 |
Joel S. Miller | 77 | 653 | 25195 |
Bin Wu | 73 | 464 | 24877 |
Satya N. Atluri | 69 | 508 | 20760 |
Peter M. Asbeck | 68 | 437 | 17365 |
David B. Marshall | 64 | 242 | 26746 |
Mark C. Field | 62 | 245 | 12616 |
Jan Drewes Achenbach | 62 | 579 | 18827 |
Gary M. Brittenham | 62 | 252 | 16156 |
Abraham P. Lee | 60 | 284 | 13324 |