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Control Systems Magazine, IEEE

Issue 3 • Date August 1985

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Displaying Results 1 - 16 of 16
  • [Front cover and table of contents]

    Page(s): 0
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    Freely Available from IEEE
  • Editorial

    Page(s): 1
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    Freely Available from IEEE
  • Process control--Past, present and future

    Page(s): 3 - 10
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    This paper gives a perspective on the development of process control from the early development and the emergence of the automation industry to today's computer-controlled systems. Some speculations on future developments are also given. View full abstract»

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  • Research needs in manufacturing systems

    Page(s): 11 - 13
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    This paper represents the findings of the IEEE Task Force on Research Needs in Manufacturing Systems, chaired by Yu-Chi Ho. The report was prepared for the Engineering Research Board of the National Academy of Engineering. View full abstract»

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  • Out of control

    Page(s): 13
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  • Introduction to machine vision

    Page(s): 14 - 17
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    This paper reviews the basic steps in computer-based recognition of patterns in image data, with emphasis on industrial machine vision. View full abstract»

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  • Redefinition of the robot motion-control problem

    Page(s): 18 - 25
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (758 KB)  

    The objective of this paper is a redefinition of the robot control problem, based on (1) realistic models for the industrial robot as a controlled plant, (2) end-effector trajectories consistent with manufacturing applications, and (3) the need for end-effector sensing to compensate for uncertainties inherent to most robotic manufacturing applications. Based on extensive analytical and experimental studies, robot dynamic models are presented that have been validated over the frequency range 0 to 50 Hz. These models exhibit a strong influence of drive system flexibility, producing lightly damped poles in the neighborhood of 8 Hz, 14 Hz, and 40 Hz, all unmodeled by the conventional rigid-body multiple-link robot dynamic approach. The models presented also quantify the significance of non-linearities in the drive system, in addition to those well known in the linkage itself. Simulations of robot dynamics and motion controls demonstrate that existing controls coupled with effective path planning produce dynamic path errors that are acceptable for most manufacturing applications. Major benefits are projected, with examples cited, for use of end-effector sensors for position, force, and process control. View full abstract»

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  • Conference calendar

    Page(s): 25
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  • Experiments in temperature measurement and control by microcomputers

    Page(s): 26 - 28
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (262 KB)  

    The purpose of this paper is to present a laboratory experiment illustrating the concept of feedback control using a microcomputer, as well as basic principles of data acquisition and computer interfacing with sensors and actuators. The experiment consists of an electrically heated, stirred tank of water with a temperature sensor. The heater and sensor are interfaced with an Apple II microcomputer, which may be programmed by the students to record and control the temperature in the tank. Two laboratory exercises in feedback control are described. Enough detail is provided in the paper to duplicate the experiment using off-the-shelf items at a modest cost ($500 excluding the computer and interface cards). The experiment provides an excellent vehicle for reinforcing principles learned in the classroom. View full abstract»

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  • American automatic control council awards

    Page(s): 29
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  • 1986 IEEE elections

    Page(s): 30 - 31
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  • Profiles af two new university engineering research centers

    Page(s): 32 - 33
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  • News

    Page(s): 33 - 34
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  • Readers forum

    Page(s): 35
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  • List to advertisers

    Page(s): 36
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  • [Back cover]

    Page(s): c4
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Aims & Scope

This Magazine ceased publication in 1990. The current retitled publication is IEEE Control Systems.

Full Aims & Scope