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Displaying 701 - 725 of 2183

A metamodel for optimization problems

January 8, 2016
Author(s)
Ibrahim Assouroko, Peter O. Denno
In mathematics, computer science, and operations research, mathematical optimization is the process of finding best feasible values (oftentimes maxima or minima) of a given objective that is modeled mathematically. This paper introduces the concept of a

Benchmarking Robot Force Control Capabilities: Experimental Results

January 7, 2016
Author(s)
Joseph A. Falco, Jeremy A. Marvel, Richard J. Norcross, Karl Van Wyk
Metrics and test methods are needed to characterize the control capabilities of robots with both intrinsic and extrinsic force sensing. The availability of these benchmarks will motivate research product development, and provide a mechanism for reporting

Flexible Lines with Setups: Analysis, Improvement, and Application

January 4, 2016
Author(s)
Cong Zhao, Jingshan Li, Ningjian Huang, John A. Horst
Setup times commonly exist in many flexible manufacturing lines to adjust tools and carry out safety and quality checks during product changeovers. In this paper, a Markov chain model is introduced to study flexible manufacturing lines with setups. An

A defect-driven diagnostic method for machine tool spindles

December 31, 2015
Author(s)
Gregory W. Vogl, M A. Donmez
Simple vibration-based metrics are, in many cases, insufficient to diagnose machine tool spindle condition. These metrics couple defect-based motion with spindle dynamics; diagnostics should be defect-driven. A new method and spindle condition estimation

Integrating views of properties in models of unit manufacturing processes

December 28, 2015
Author(s)
Peter O. Denno, Duck B. Kim
This paper investigates the potential advantages and pitfalls of directly integrating knowledge expressed as predictive model equations with other process knowledge. The context of this integration is models of unit manufacturing processes. The method

Tip characterization method using multi-feature characterizer for CD-AFM

December 23, 2015
Author(s)
Ndubuisi G. Orji, Hiroshi Itoh, Chumei Wang, Ronald G. Dixson, Sebastian Schmidt, Bernd Irmer, Peter S. Walecki
In atomic force microscopy (AFM) metrology, the tip is a key source of uncertainty. Images taken with an AFM show a change in feature width and shape that depends on tip geometry. This geometric distortion is more pronounced when measuring features with

Methods and Tools for Performance Assurance of Smart Manufacturing Systems

December 22, 2015
Author(s)
Deogratias Kibira, Katherine C. Morris, Senthilkumaran Kumaraguru
The emerging concept of smart manufacturing systems is defined in part by the introduction of new technologies that are promoting rapid and widespread information flow within the manufacturing system and surrounding its control. These systems can deliver

Annual Manufacturing Review

December 14, 2015
Author(s)
Douglas Thomas, Anand M. Kandaswamy
This report provides an overview of the US manufacturing industry. There are three aspects of U.S. manufacturing that are considered: (1) how the US industry compares to other countries, (2) the trends in the domestic industry, and (3) the industry trends

Inventory and Flow Time in the US Manufacturing Industry

December 14, 2015
Author(s)
Douglas Thomas, Anand M. Kandaswamy
Advancements in the efficient use of inputs, such as land and labor, have been a key driver of per capita income growth throughout history. One method for identifying potential efficiency improvements is lean manufacturing or lean production, a set of

An Industrial Control System Cybersecurity Performance Testbed

December 10, 2015
Author(s)
Richard Candell, Timothy A. Zimmerman, Keith A. Stouffer
The National Institute of Standards and Technology (NIST) is developing a cybersecurity performance testbed for industrial control systems. The goal of the testbed is to measure the performance of industrial control systems (ICS) when instrumented with

Measuring and Representing the Performance of Manufacturing Assembly Robots

December 10, 2015
Author(s)
Michael O. Shneier, Elena R. Messina, Craig I. Schlenoff, Frederick M. Proctor, Thomas Kramer, Joseph Falco
With the growth of robotic technology, there is a need for performance measures to characterize and compare robots and to help determine which features are most suited to a particular application. Robot systems are complex and involve a wide range of

Towards a Virtual Factory Prototype

December 5, 2015
Author(s)
Sanjay Jain, David Lechevalier, Jungyub Woo, Seungjun Shin
A virtual factory should represent most of the features and operations of the corresponding real factory. Some of the key features of the virtual factory include the ability to assess performance at multiple resolutions and generate analytics data similar

Datum Planes Based on a Constrained L1 Norm

December 1, 2015
Author(s)
Craig M. Shakarji, Vijay Srinivasan
This paper has two major goals. First, we present an algorithm for establishing planar datums suitable for a default in tolerancing standards. The algorithm is based on a constrained minimization search based on the L_1 (L1) norm after forming a convex

Performance Challenges Identification Method for Smart Manufacturing Systems

November 27, 2015
Author(s)
Kiwook Jung, Katherine C. Morris, Kevin W. Lyons, Swee K. Leong, Hyunbo Cho
Smart Manufacturing Systems (SMS) need to be agile to adapt to new situations by using detailed, precise, and appropriate data for intelligent decision-making. The intricacy of the relationship of strategic goals to operational performance across the many

A Constrained L2 Based Algorithm for Standardized Planar Datum Establishment

November 18, 2015
Author(s)
Craig M. Shakarji, Vijay Srinivasan
For years (decades, in fact) a definition for datum planes has been sought by ASME and ISO standards writers that combines the contacting nature of traditional surface plate mating with a means of balancing rocking conditions when there is a centrally
Displaying 701 - 725 of 2183
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