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Control Systems, IEEE

Issue 4 • Date Aug. 2005

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Displaying Results 1 - 25 of 27
  • Bicycle dynamics and control: adapted bicycles for education and research

    Publication Year: 2005 , Page(s): 26 - 47
    Cited by:  Papers (63)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2904 KB) |  | HTML iconHTML  

    In this paper, the dynamics of bicycles is analyzed from the perspective of control. Models of different complexity are presented, starting with simple ones and ending with more realistic models generated from multibody software. Models that capture essential behavior such as self-stabilization as well as models that demonstrate difficulties with rear wheel steering are considered. Experiences using bicycles in control education along with suggestions for fun and thought-provoking experiments with proven student attraction are presented. Finally, bicycles and clinical programs designed for children with disabilities are described. View full abstract»

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  • In memoriam - Professor Ernest Bruce Lee

    Publication Year: 2005 , Page(s): 97
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    Freely Available from IEEE
  • Bicycling Science [Book Review]

    Publication Year: 2005 , Page(s): 81 - 83
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    Freely Available from IEEE
  • Pumping a swing by standing and squatting: do children pump time optimally?

    Publication Year: 2005 , Page(s): 48 - 56
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1172 KB) |  | HTML iconHTML  

    Research in biomechanics supports the idea that humans perform skilled tasks as self-optimizing machines. A rider pumping a playground swing can be modeled adequately as a second-order system. The focus of this article is the problem of time-optimal pumping of a swing, where the rider pumps the swing by alternately standing and squatting. The rider-and-swing system is modeled as a pendulum with a bob of mass attached to a fixed support by a rope of variable length. Children playing on a swing generally stand up at the lowest point and squat at the highest. Using the Pontryagin minimum principle and techniques from geometric optimal control, it is shown that this pumping strategy is time-optimal for the problem of maximizing the amplitude of oscillation of a swing. View full abstract»

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  • IEEE Control Systems Society

    Publication Year: 2005 , Page(s): 103
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  • Northeast Nonlinear and Hybrid Control Workshop

    Publication Year: 2005 , Page(s): 84 - 91
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  • Fundamentals of Adaptive Filtering [Book Review]

    Publication Year: 2005 , Page(s): 77 - 79
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  • The outrigger: a prehistoric feedback mechanism

    Publication Year: 2005 , Page(s): 57 - 72
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2425 KB) |  | HTML iconHTML  

    The history of the outrigger, an ancient Polynesian device with a feedback mechanism, is chronicled in the paper with particular focus on its basic roll stability and the outrigger loop. The action of an outrigger is two-fold. First, the outrigger adds buoyancy to the vessel since the outriggers are made of materials that float irrespective of their shapes. More importantly, the addition of a float at the end of a boom dramatically increases the roll stability of small canoes. View full abstract»

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  • World-class educators

    Publication Year: 2005 , Page(s): 20 - 24
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  • Awards given in paradise

    Publication Year: 2005 , Page(s): 92 - 96
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  • Constrained Control and Estimation: An Optimization Approach [Book Review]

    Publication Year: 2005 , Page(s): 79 - 81
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  • President's message - Education, instruction, and motivation

    Publication Year: 2005 , Page(s): 10 - 24
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1059 KB) |  | HTML iconHTML  

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  • IEEE/ACM Transactions on Computational Biology and Bioinformatics

    Publication Year: 2005 , Page(s): 17
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  • Mechatronic Systems Fundamentals [Book Review]

    Publication Year: 2005 , Page(s): 73 - 77
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  • Precision control of hard disk drives

    Publication Year: 2005 , Page(s): 14 - 19
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (468 KB)  

    The paper discusses the challenges and trends in the precision control of the head-positioning servomechanism of a hard disk drive. The read/write head is positioned through a voice coil motor (VCM) actuator to which the heads are attached using a thin stainless steel suspension. The servomechanism is expected to move the read/write head from one track to another in minimum time (track-seek mode) and regulate head position precisely on the center of the track during track-following mode. Near time-optimal control is widely used for the seek mode, while linear mode such as proportional-integral differential (PID) plus loop-shaping compensation is used for track following. An alternative to the servomechanism is a lightweight, secondary-stage actuator placed close to the point of control. For small step commands, the dual-stage set-up significantly performs better than a single-stage actuator in regulating the read/write head position. Maneuvers for large step commands are dominated by the VCM's response where the secondary stage provides negligible improvement. View full abstract»

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  • IEEE Control Systems Magazine - Aug. 2005

    Publication Year: 2005 , Page(s): 01
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  • Table of contents

    Publication Year: 2005 , Page(s): 2 - 4
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  • Fron the Editor - Chalk it up

    Publication Year: 2005 , Page(s): 6 - 8
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  • About this issue

    Publication Year: 2005 , Page(s): 9
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  • Call for Papers - American Control Conference 2006 celebrate 25 years of the ACC

    Publication Year: 2005 , Page(s): 11
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  • IEEE is invention [advertisement]

    Publication Year: 2005 , Page(s): 15
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  • Expand your technology horizons - The Proceedings of the IEEE [advertisement]

    Publication Year: 2005 , Page(s): 25
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  • Ph.D. dissertations

    Publication Year: 2005 , Page(s): 98
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  • Conference calendar

    Publication Year: 2005 , Page(s): 99 - 100
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  • Corrections [In "The relation between the 3-D Bode plot and the Root Locus," which appeared in the February 2005 issue]

    Publication Year: 2005 , Page(s): 100
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Aims & Scope

IEEE Control Systems Magazine is the largest circulation technical periodical worldwide devoted to all aspects of control systems.

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Meet Our Editors

Editor-in-Chief
Jonathan P. How
jhow@mit.edu