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Search Publications by: Vijay Srinivasan (Fed)

Displaying 26 - 50 of 99

Geometrical Product Specifications

June 5, 2019

Author(s)

Vijay Srinivasan

No abstract

Toward a New Mathematical Definition of Datums in Standards to Support Advanced Manufacturing

December 20, 2018

Author(s)

Craig M. Shakarji, Vijay Srinivasan

Recent advances in the digitization of manufacturing have prompted ASME and ISO standards committees to reexamine the definition of datums. Any new definition of datums considered by the standards committees should cover all datum feature types used in

Optimality Conditions for Constrained Least Squares Fitting of Circles, Cylinders, and Spheres to Establish Datums

October 10, 2018

Author(s)

Craig M. Shakarji, Vijay Srinivasan

This paper addresses the combinatorial characterizations of the optimality conditions for constrained least squares fitting of circles, cylinders, and spheres to a set of input points. It is shown that the necessary condition for optimization requires

A Brief Analysis of Recent ISO Tolerancing Standards and Their Potential Impact on Digitization of Manufacturing

September 3, 2018

Author(s)

Ed Morse, Craig M. Shakarji, Vijay Srinivasan

The publication of the latest edition of ISO 1101 in 2017 is a landmark event in the development of ISO tolerancing standards. It represents an important milestone in the evolution of ISO tolerancing standards powered by a synergy between technological

Toward a Classification of Partitioning Operations for Standardization of Geometrical Product Specifications and Verification

September 3, 2018

Author(s)

Vijay Srinivasan, Nabil Anwer, Paul J. Scott

Partitioning is one of the four major operations used in the international standards issued by ISO/TC 213 on geometrical product specifications and verifications (GPS, for short). The ISO GPS standards define both tolerancing (for specification) and

On Algorithms and Heuristics for Constrained Least-Squares Fitting of Circles and Spheres to Support Standards

August 28, 2018

Author(s)

Craig M. Shakarji, Vijay Srinivasan

Constrained least-squares fitting has gained considerable popularity among national and international standards committees as the default method for establishing datums on manufactured parts. This has resulted in the emergence of several interesting and

Convexity and Optimality Conditions for Constrained Least-Squares Fitting of Planes and Parallel Planes to Establish Datums

November 9, 2017

Author(s)

Craig M. Shakarji, Vijay Srinivasan

This paper addresses some important theoretical issues for constrained least-squares fitting of planes and parallel planes to a set of input points. In particular, it addresses the convexity of the objective function and the combinatorial characterizations

Optimality Conditions for Constrained Least-Squares Fitting of Circles, Cylinders, and Spheres to Establish Datums

August 9, 2017

Author(s)

Craig M. Shakarji, Vijay Srinivasan

This paper addresses the combinatorial characterizations of the optimality conditions for constrained least-squares fitting of circles, cylinders, and spheres to a set of input points. It is shown that the necessary condition for optimization requires

A Remarkable Resurgence of Artificial Intelligence and its Impact on Automation and Autonomy

February 17, 2017

Author(s)

KC Morris, Craig I. Schlenoff, Vijay Srinivasan

This guest editorial looks at the resurgence of artificial intelligence, machine learning, and other related technologies. It explores its impact on government policy, national productivity growth, academic research, the role of humans, and the impact on

Computational investigations for a new, constrained least-squares datum definition for circles, cylinders, and spheres

November 17, 2016

Author(s)

Craig M. Shakarji, Vijay Srinivasan

For engineering drawings and CAD definitions, the problem of a suitable datum definition for datum features of circles, spheres, and cylinders has been sought by standards writers over decades. The maximum-inscribed and minimum-circumscribed definitions

Cyber-physical Systems Engineering for Manufacturing

October 7, 2016

Author(s)

Allison Barnard Feeney, Simon P. Frechette, Vijay Srinivasan

There is a convergence of interests in cyber-physical systems, systems engineering, and manufacturing innovation in the United States. The U.S. National Institute of Standards and Technology (NIST) has undertaken research programs in smart manufacturing

On architecting and composing engineering information services to enable smart manufacturing

August 19, 2016

Author(s)

Boonserm Kulvatunyou, Nenad Ivezic, Vijay Srinivasan

Engineering information systems play an important role in the current era of digitization of manufacturing, which is also known as smart manufacturing. Traditionally, these engineering information systems spanned the lifecycle of a product by providing

Theory and algorithm for planar datum establishment using constrained total least-squares

May 19, 2016

Author(s)

Craig M. Shakarji, Vijay Srinivasan

First, we present an efficient algorithm for establishing planar datums that is based on a constrained minimization search based on the L2 norm after forming a convex surface from sampled points. Visualized by Gauss maps, we prove that the problem reduces