Open Access. Powered by Scholars. Published by Universities.®

Operations Research, Systems Engineering and Industrial Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

1988

Discipline
Institution
Keyword
Publication
Publication Type

Articles 1 - 30 of 64

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

A Systematic Transition To Flexible Manufacturing, Sema E. Alptekin, Daniel L. Webber Dec 1988

A Systematic Transition To Flexible Manufacturing, Sema E. Alptekin, Daniel L. Webber

Industrial and Manufacturing Engineering

The transition from basic automation to flexible manufacturing is an expensive and tedious procedure. It requires meticulous planning and almost clairvoyant forecasting to insure that the initial flexibility obtained is sufficient to allow growth and expansion in the future. This paper will suggest a systematic and methodological approach to achieve optimal flexibility and describe the present results of its application to an ongoing system transformation. Conclusions based on existing levels of completion are presented along with identification of critical and non critical flexibility requirements. The considerations and steps taken are summarized in a procedural format which may then be applied ...


Acuta Enews December 1988, Vol. 17, No. 12 Dec 1988

Acuta Enews December 1988, Vol. 17, No. 12

ACUTA Newsletters

In This Issue

President's Message

Party Line

User Groups

"Project Eagle" And Favors

University of Kentucky Calls on Voice Automation

Of Mouse & Man


The Construction Of Analytic Diffeomorphisms For Exact Robot Navigation On Star Worlds, Elon Rimon, Daniel E. Koditschek Oct 1988

The Construction Of Analytic Diffeomorphisms For Exact Robot Navigation On Star Worlds, Elon Rimon, Daniel E. Koditschek

Departmental Papers (ESE)

A navigation function is a scalar valued function on a robot configuration space which encodes the task of moving to a desired destination without hitting any obstacles. Our program of research concerns the construction of navigation functions on a family of configuration spaces whose “geometric expressiveness” is rich enough for navigation amidst real world obstacles. A sphere world is a compact connected subset of En whose boundary is the finite union of disjoint (n-1)-spheres. In previous work we have constructed navigation functions for every sphere world. In this paper we embark upon the task of extending the construction ...


Acuta Enews October 1988, Vol. 17, No. 10 Oct 1988

Acuta Enews October 1988, Vol. 17, No. 10

ACUTA Newsletters

In This Issue

Administrative Director

President's Message

Party Line

User Groups

Anatomy of a Telecommunications Installation Part 3

Regional Meeting Reports


Application Of A New Lyapunov Function: Global Adaptive Inverse Dynamics For A Single Rigid Body, Daniel E. Koditschek Sep 1988

Application Of A New Lyapunov Function: Global Adaptive Inverse Dynamics For A Single Rigid Body, Daniel E. Koditschek

Technical Reports (ESE)

The introduction of “error coordinates” and a “tracking potential” on the rotations affords a global nonlinear version of inverse dynamics for attitude tracking. The resulting algorithm produces “almost global” asymptotically exact tracking: this convergence behavior is as strong as the topology of the phase space can allow. A new family of strict global Lyapunov functions for mechanical systems is applied to achieve an adaptive version of the inverse dynamics algorithm in the case that the inertial parameters of the rigid body are not known à priori. The resulting closed loop adaptive system is shown to be stable, and the rigid ...


Acuta Enews August 1988, Vol. 17, No. 8 Aug 1988

Acuta Enews August 1988, Vol. 17, No. 8

ACUTA Newsletters

In This Issue

President's Message

Party Line

User Groups

Telecommunications Systems, 19 times

Anatomy OF A Telecommunications Installation


Acuta Enews June 1988, Vol. 17, No. 6 Jun 1988

Acuta Enews June 1988, Vol. 17, No. 6

ACUTA Newsletters

In This Issue

President's Message

Party Line

Bits & Pieces

How much stress can fiber take?

AT&T Kills 800 Service


Strict Global Lyapunov Functions For Mechanical Systems, Daniel E. Koditschek Jun 1988

Strict Global Lyapunov Functions For Mechanical Systems, Daniel E. Koditschek

Departmental Papers (ESE)

A novel Lyapunov function is introduced. The author treats the PD compensated mechanical system, which is defined on a configuration space which admits a trivial tangent bundle. Previous results are derived in a simpler form, namely, that such systems are exponentially stable, hence BIBO stable, and steady-state ouptut magnitudes are proportional to input magnitudes with a constant of proportionality depending in a simple fashion on the PD gain magnitudes.

For more information: Kod*Lab


A Model For The Determination Of Market Based Pricing Of Telecommunication Products, Katherine J. Sullivan May 1988

A Model For The Determination Of Market Based Pricing Of Telecommunication Products, Katherine J. Sullivan

Theses

The deregulation of AT&T, has impacted telecommunication product pricing in the U.S. market. Previously, pricing had been based on cost plus mark-up, as stipulated by regulatory commissions. Now, pricing decisions require consideration of the competitive impact, consumer demand for the product, corporate pricing objectives and marketing strategies. This paper proposes a pricing process that is relevant for this new environment which enables the product manager to price properly.

The method proposed utilizes microeconomic theory and takes into account the product test price, unit cost, opportunity cost, nonprice factor cost and consumer demand. Incorporating a number of different pricing ...


Analysis Of A Simplified Hopping Robot, Daniel E. Koditschek, Martin Buehler May 1988

Analysis Of A Simplified Hopping Robot, Daniel E. Koditschek, Martin Buehler

Departmental Papers (ESE)

We offer some preliminary analytical results concerning simplified models of Raibert’s hopper. We represent the task of achieving a recurring hopping height for an actuated “ball” robot as a stability problem in the setting of a nonlinear discrete dynamical system. We model the properties of Raibert’s control scheme in a simplified fashion, and provide conditions under which the procedure results in closed loop dynamics possessed of a globally attracting fixed point - the formal rendering of what we intuitively mean by a “correct” strategy. The motivation for this work is the hope that it will facilitate the development of ...


Acuta Enews May & April 1988, Vol. 17, No. 4 & 5 Apr 1988

Acuta Enews May & April 1988, Vol. 17, No. 4 & 5

ACUTA Newsletters

In This Issue

President's Message

Party Line

The 10 Commandments of Telecommunications

Squeezing Phone Lines For All They're Worth

Call for Nominations

From Region 2

Keeping the Telephone Alive

911- Miami University


Distributed Control System For A Juggling Robot, Daniel E. Koditschek, Martin Buehler Apr 1988

Distributed Control System For A Juggling Robot, Daniel E. Koditschek, Martin Buehler

Departmental Papers (ESE)

The juggling work takes its place within a larger program of research concerned with the development of unified methodologies for robot task representation, planning, and control. The talk will summarize this large context, and then provide a more detailed look at progress in juggling to date.

For more information: Kod*Lab


The Evaluation Of Efficiency Determination Of Screening Device (Pressure Screen) By Image Analysis, Rajeev Kumar Goyal Apr 1988

The Evaluation Of Efficiency Determination Of Screening Device (Pressure Screen) By Image Analysis, Rajeev Kumar Goyal

Master's Theses

The Omnicon 3600 image analyzer was used in the study of the evaluation of screening efficiency determination methods. It is very difficult to get a good over all contaminant mass balance across a pressure screen because of the factors involved such as sampling around a screen, time spent in collecting the samples, and possible size reduction of the contaminants by the pump and screen. The image analyzer gives the contaminant analysis in terms of the total number of particles, total area of all the particles, the mean particle area and a histogram of the contaminant size distribution. The histogram data ...


Acuta Enews March 1988, Vol. 17, No. 3 Mar 1988

Acuta Enews March 1988, Vol. 17, No. 3

ACUTA Newsletters

In This Issue

President's Message

Party Line

17th Annual Summer Conference

Potpourri

From the Board

Plan Now For San Diego

The University of British Columbia

The Other Side of T-1


Proposed Scheduling Methods For Printed Circuit Board Assembly, Tali Freed, Ezey M. Dar-El, Oded Z. Maimon Jan 1988

Proposed Scheduling Methods For Printed Circuit Board Assembly, Tali Freed, Ezey M. Dar-El, Oded Z. Maimon

Industrial and Manufacturing Engineering

The current practice in the assembly of electronic components on printed circuit boards (PCB's) is serial production, a process characterized by very long set-up times.

However. with the advent of efficient on-line process information, new production control methods are now possible. This paper proposes two new production methods - the Grouped Set-up (GSU) method and the Sequence-Dependent Scheduling (SDS) method, which can significantly reduce set-up times.

It is shown that the GSU always performs better than the SDS method in terms of total production flow (throughput). while the SDS performs better than the GSU method in terms of work-in-process (WIP ...


Development Of A New Management Information System For Lehigh University Small Business Development Center /, Mehdi Hojjat Jan 1988

Development Of A New Management Information System For Lehigh University Small Business Development Center /, Mehdi Hojjat

Theses and Dissertations

No abstract provided.


Hypertext: A Tool For System Development Documentation Management /, Timothy B. Halton Jan 1988

Hypertext: A Tool For System Development Documentation Management /, Timothy B. Halton

Theses and Dissertations

No abstract provided.


Application Of Ultrasonic Pod Models, T. A. Gray, F. Amin, R. Bruce Thompson Jan 1988

Application Of Ultrasonic Pod Models, T. A. Gray, F. Amin, R. Bruce Thompson

Review of Progress in Quantitative Nondestructive Evaluation

The ability to quantify the reliability of nondestructive evaluation (NDE) inspection techniques is required to integrate inspectability into the component design process. Inspectability is typically evaluated on the basis of the design engineer’s experience and knowledge of NDE. While this approach can yield adequate designs with regard to inspection reliability, the potential for uninspectability remains. There is also the possibility that the designer’s knowledge of the reliability of NDE techniques may be limited to “standard” approaches which may be be inadequate for new component geometries or materials. This could lead the design engineer to imagine that a given ...


Prediction Of The Probability Of Eddy Current Flaw Detection, R. E. Beissner, K. A. Bartels, J. L. Fisher Jan 1988

Prediction Of The Probability Of Eddy Current Flaw Detection, R. E. Beissner, K. A. Bartels, J. L. Fisher

Review of Progress in Quantitative Nondestructive Evaluation

The validity of a nondestructive inspection method can be measured by two quantities, the probability that a given flaw size will be detected, and the probability that background noise will give rise to a false indication of the presence of a flaw. Unfortunately, experimental determination of the probability of detection (POD) and the probability of false alarm (PFA) requires a rather extensive set of measurements to obtain statistically sound estimates. Furthermore, if one or more of the parameters that define the method, such as the scan track spacing or probe configuration, are changed, then the full set of measurements must ...


Human Factors Impact On Nde Reliability, J. C. Spanner Sr. Jan 1988

Human Factors Impact On Nde Reliability, J. C. Spanner Sr.

Review of Progress in Quantitative Nondestructive Evaluation

Measurements of nondestructive testing (NDT) system reliability in both the nuclear and non-nuclear segments of industry have consistently produced disappointing results [1,2,3]. While the equipment and techniques appear intrinsically capable of the required performance, overall reliability is often so poor that the credibility of the entire inspection process is jeopardized. On the basis of results accumulated during the past decade, we now know that many NDT processes are not sufficiently reliable to meet the current needs of industry; but we do not know why! Furthermore, we expect NDT performance under actual field conditions to be no better, and ...


Analysis Of A Semi-Automatic System For The Ultrasonic Measurement Of Texture, S. J. Wormley, R. Bruce Thompson, Y. Li Jan 1988

Analysis Of A Semi-Automatic System For The Ultrasonic Measurement Of Texture, S. J. Wormley, R. Bruce Thompson, Y. Li

Review of Progress in Quantitative Nondestructive Evaluation

The texture (preferred grain orientation) of rolled metal plates influences a number of important properties. Included are their form-ability into complex shapes such as beverage cans, vehicle bodies, or airframe skins, and their response to static or dynamic loading when the resulting components are placed into service [1–3]. Considerable benefit would be gained from the development of instrumentation which could measure texture in real time for process control applications or which could easily establish the texture of incoming materials or finished components so that their elastic or plastic mechanical properties could be estimated. As an example of the economic ...


Theory And Analysis Of Consecutive-K-Out-Of-N:G Systems Reliability , Weixing Zhang Jan 1988

Theory And Analysis Of Consecutive-K-Out-Of-N:G Systems Reliability , Weixing Zhang

Retrospective Theses and Dissertations

This study introduces the concept of consecutive-k-out-of-n:G systems. Twelve theorems are derived to establish and support the basic theory of consecutive-k-out-of-n:G systems reliability;Applying the theorems, one can evaluate the reliability of linear consecutive-k-out-of-n:G systems and the reliability of circular consecutive-k-out-of-n:G systems, respectively. One can determine the reliability importance of components that indicates which component deserves the most additional investigation and development to improve the overall system reliability at the minimum effort. The study also provides a way to apply the methods for consecutive-k-out-of-n:F systems to consecutive-k-out-of-n:G systems. There exist n!/2 possible designs ...


The Life Cycle Depreciation (Lcd) Model , Wei-Pen Tsai Jan 1988

The Life Cycle Depreciation (Lcd) Model , Wei-Pen Tsai

Retrospective Theses and Dissertations

The introduction of the life cycle life estimation concept was brought about by the need to improve the accuracy of life forecasts for certain types of telecommunication property. The main characteristic of these properties is that they are subject to rapid and cyclical technological change. In conjunction with the life cycle life estimation concept it has been necessary to reconsider the related capital recovery procedures. This study examines in detail a life cycle depreciation (LCD) model;Four steps are required for the model: Data analysis, life cycle forecasts, life estimation, and depreciation calculation. Among the four steps, the forecasts of ...


The Selection Of Technological Forecasting Models In Life Analysis , Hyun-Seung Oh Jan 1988

The Selection Of Technological Forecasting Models In Life Analysis , Hyun-Seung Oh

Retrospective Theses and Dissertations

In a technology driven environment, a depreciation estimate which is based on traditional life analysis results in a decelerated rate of capital recovery. The time pattern of technological growth models needs to be incorporated into the life analysis framework especially in those industries experiencing fast technological changes;Various technological forecasting models have been proposed to represent the time pattern of technological growths. Of six such models studied, some models do significantly better than others, especially at low penetration levels, in predicting future levels of growth. The lack of a direct relationship between fitting and forecasting ability implies that fitting alone ...


A Microcomputer-Based Vision System To Recognize And Locate Partially Occluded Parts In Binary And Gray Level Images , Volker Peter Petersen Jan 1988

A Microcomputer-Based Vision System To Recognize And Locate Partially Occluded Parts In Binary And Gray Level Images , Volker Peter Petersen

Retrospective Theses and Dissertations

This paper presents a microcomputer-based machine vision system to recognize and locate partially occluded parts in binary or gray level images. The recognition process is restricted to untilted, two-dimensional objects;A new edge-tracking technique in conjunction with a straight-line approximation algorithm is used to identify the local features in an image. Corners and holes serve as local features. The local features identified in an image are matched against all the compatible features stored for the model parts. The algorithm computes, for all image and model features matches, a coordinate transformation that maps a model feature onto an image feature. A ...


The Taguchi Methods Of Quality Control Examined: With Reference To Sundstrand-Sauer, Cheryl Lynn Moller-Wong Jan 1988

The Taguchi Methods Of Quality Control Examined: With Reference To Sundstrand-Sauer, Cheryl Lynn Moller-Wong

Retrospective Theses and Dissertations

No abstract provided.


Laser-Ultrasonics For Industrial Applications, Jean-Pierre Monchalin, Jean-Daniel Aussel, Paul Bouchard, René Héon Jan 1988

Laser-Ultrasonics For Industrial Applications, Jean-Pierre Monchalin, Jean-Daniel Aussel, Paul Bouchard, René Héon

Review of Progress in Quantitative Nondestructive Evaluation

Increased use of advanced materials and more stringent requirements for process and quality control are creating new needs for nondestructive inspection techniques. Ultrasonics is a widely used technique for defect detection in various materials and is being developed, and even in some cases actually applied for microstructural characterization. However, ultrasonics in its present state of implementation in industry suffers several limitations. Probing materials at elevated temperature is made difficult by fluid coupling problems. Inspecting specimens of complex shapes requires sophisticated robotic manipulators to properly orient the transducer. Furthermore, since the technique relies on a piezoelectric resonator to generate and receive ...


A Remote Laser System For Material Characterization At High Temperatures, R. J. Dewhurst, C. Edwards, A. D. W. Mckie, S. B. Palmer Jan 1988

A Remote Laser System For Material Characterization At High Temperatures, R. J. Dewhurst, C. Edwards, A. D. W. Mckie, S. B. Palmer

Review of Progress in Quantitative Nondestructive Evaluation

For many years, new techniques have been developed to overcome the problems involved with the generation and detection of ultrasound in materials at high temperature [1,2]. A non-contacting technique is described using lasers to generate and detect ultrasound and which can be used to study the variation in acoustic velocity as a function of temperature. Results are presented for the change in longitudinal velocity (vℓ) with increasing temperature in five polycrystalline materials, namely Dural, aluminum, AISI-310 stainless steel, iron and graphite.


Computer Aided Ultrasonic Porosity Assessment For Cast Aluminum Alloy, David V. Rypien, Alan Sprague, Laszlo Adler Jan 1988

Computer Aided Ultrasonic Porosity Assessment For Cast Aluminum Alloy, David V. Rypien, Alan Sprague, Laszlo Adler

Review of Progress in Quantitative Nondestructive Evaluation

Successful determination of the volume fraction and pore size of porosity in cast aluminum by ultrasonic attenuation spectroscopy has previously been reported [1]. Cast aluminum samples having a dilute distribution of pores ranging from 1% to 5% volume fraction and an average pore radius from 50 µm to 500 µm were considered.


Ultrasonic Transducer Characterization Station, W. D. Jolly, F. A. Bruton, C. Fedor Jan 1988

Ultrasonic Transducer Characterization Station, W. D. Jolly, F. A. Bruton, C. Fedor

Review of Progress in Quantitative Nondestructive Evaluation

The portable ultrasonic transducer characterization station (TCS) was developed in support of the U.S. Air Force Manufacturing Technology Contract F33615-85-C-5036, “Advanced Ultrasonic NDE Transducer Performance and Producibility”. The program objective is to develop and demonstrate multiple commercial sources of well characterized, reproducible ultrasonic transducers. The overall task of this MANTECH program is to develop procedures to help users write performance specifications and to develop tools to help suppliers design ultrasonic transducers to meet performance specifications.