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Displaying 1151 - 1175 of 4224

Embedding X.509 Digital Certificates in Three-Dimensional Models for Authentication, Authorization, and Traceability of Product Data

July 14, 2016

Author(s)

Thomas D. Hedberg, Sylvere I. Krima, Jaime A. Camelio

Exchange and reuse of three-dimensional (3D)-product models is hampered by the absence of trust in product-lifecycle-data quality. The root cause of the missing trust is years of "silo" functions (e.g., engineering, manufacturing, quality assurance) using

Synchrotron 4-dimensional imaging of two-phase flow through porous media

July 13, 2016

Author(s)

Felix H. Kim, D. Penumadu, P. Patel, X. Xiao, E. J. Garboczi, Shawn P. Moylan, M A. Donmez

Near real-time visualization of complex two-phase flow in a porous medium was demonstrated with dynamic 4D (3D + time) imaging at the 2-BM beam line of the Advanced Photon Source (APS) at Argonne National Laboratory. Advancing fluid fronts through tortuous

Mobile Manipulator Performance Measurement Towards Manufacturing Assembly Tasks

July 12, 2016

Author(s)

Roger V. Bostelman, Sebti Foufou, Steven A. Legowik, Tsai H. Hong

Mobile manipulator performance measurement research is relatively minimal as compared to that of robot arms. Measurement methods, such as optical tracking systems, are useful for measuring the performances of mobile manipulators, although at a much higher

Model-based engineering for the integration of manufacturing systems with advanced analytics

July 10, 2016

Author(s)

David Lechevalier, Anantha Narayanan Narayanan, Sudarsan Rachuri, Sebti Foufou, Yung-Tsun Lee

To employ data analytics effectively and efficiently on manufacturing systems, engineers and data scientists need to collaborate closely to bring their domain knowledge together. In this paper, we introduce a domain-specific modeling approach to integrate

Design of a MEMS-based motion stage based on a lever mechanism for generating large displacements and forces

July 6, 2016

Author(s)

Yong Sik Kim, Hongliang Shi, Nicholas Dagalakis, Satyandra K. Gupta

Conventional miniaturized motion stages have the volume of 50 to 60 cm3 and the range of motion around 100 µm. Micro-Electro-Mechanical Systems (MEMS)-based motion stages have been good alternatives in some applications for small foot print, micron-level

Implementing the ISO 15746 Standard for Chemical Process Optimization

July 3, 2016

Author(s)

Guodong Shao, Peter O. Denno, Albert T. Jones, Yan Lu

Integrating advanced process control solutions with optimization (APC-O) solutions, within any factory, enables more efficient production processes. Currently, vendors who provide the software applications that implement control solutions are isolated and

Infrared thermography of welding zones produced by polymer extrusion additive manufacturing

July 2, 2016

Author(s)

Jonathan E. Seppala, Kalman D. Migler

In common thermoplastic additive manufacturing (AM) processes, a solid polymer filament is melted, extruded though a rastering nozzle, welded onto neighboring layers and solidified. The temperature of the polymer at each of these stages is the key

Technical Data Packages (TDPs) from the Smart Manufacturing Systems (SMS) Test Bed

July 1, 2016

Author(s)

Thomas D. Hedberg, Moneer M. Helu, Allison Barnard Feeney

Data is collected from the Manufacturing Lab using the MTConnect standard. That data is aggregated and published internally and externally of NIST via web services. Three channels of data dissemination are available or becoming available from the SMS Test

Costs, Benefits, and Adoption of Additive Manufacturing: A Supply Chain Perspective

June 30, 2016

Author(s)

Douglas Thomas

Currently, additive manufactured products represent less than one percent of all manufactured products in the US; however, as the costs of additive manufacturing systems decrease, this technology may become widely adopted and change the supplier

Identifying uncertainty in Laser Powder Bed Fusion models

June 30, 2016

Author(s)

Felipe F. Lopez, Paul Witherell, Brandon Lane

A limitation frequently encountered in additive manufacturing (AM) models is a lack of indication about their precision and accuracy. Often overlooked, information on model uncertainty is required for validation of AM models, qualification of AM-produced

Inspection of embedded internal features in additively manufactured metal parts using metrological x-ray computed tomography

June 30, 2016

Author(s)

Felix H. Kim, Herminso Villarraga-Gomez, Shawn P. Moylan

Advances in metal additive manufacturing (AM) have made it possible to build parts with complex geometry. Metal AM has a high potential to impact various industries including aerospace and automotive. Complex interior features can be designed to reduce

Survey of Research for Performance Measurement of Mobile Manipulators

June 30, 2016

Author(s)

Roger V. Bostelman, Tsai H. Hong, Jeremy A. Marvel

This survey provides the basis for developing research in the area of mobile manipulator performance measurement, an area that has relatively few research articles, as com-pared to other mobile manipulator research areas. The survey begins with a

PRELIMINARY STUDY TOWARD SURFACE TEXTURE AS A PROCESS SIGNATURE IN LASER POWDER BED FUSION ADDITIVE MANUFACTURING

June 29, 2016

Author(s)

Jason Fox, Shawn P. Moylan, Brandon Lane

Additive manufacturing (AM) allows for highly complex designs that cannot be achieved through subtractive or formative manufacturing techniques. A limiting factor of AM, however, is the as-built surface quality. Additionally, there is limited knowledge on

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