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Control Systems, IEEE

Issue 2 • Date April 2008

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Displaying Results 1 - 21 of 21
  • Front cover - IEEE Control Systems Magazine

    Page(s): c1
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    Freely Available from IEEE
  • Contents

    Page(s): 2
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  • Questionable Publicity [From the Editor]

    Page(s): 6 - 7
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    Freely Available from IEEE
  • About This Issue: Medley

    Page(s): 8 - 9
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  • Computer aided modeling, analysis and design of control systems - A perspective (Reprint; ibid, vol. 3, n. 2 83) [25 Years Ago]

    Page(s): 14 - 18
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  • IEEE Control Systems Magazine Board

    Page(s): 14
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  • Feedback

    Page(s): 15 - 101
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  • Kalman Filters [Ask The Experts]

    Page(s): 16 - 18
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    In this issue, we invite Bruno Teixeira to explain the difference between the Kalman filter and the Kalman predictor. Bruno, who is a Ph.D. student at Federal University of Minas Gerais in Brazil, provides a complete review of the relevant equations in a convenient, common format. View full abstract»

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  • Introducing the Member Activities Board

    Page(s): 19
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  • Technical Activities Board

    Page(s): 20
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  • People in Control [interviews with Spyros G. Tzafestas and May-Win Thein]

    Page(s): 21 - 26
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    Presents interviews with Spyros G. Tzafestas, current president of the European Control Association (EUCA), and May-Win Thein, who is the publicity chair for the 2008 American Control Conference (ACC), to be held in Seattle in June. View full abstract»

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  • Control of HIV Infection Dynamics

    Page(s): 28 - 39
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1119 KB)  

    This article describes a drug scheduling method based on a reduced-order model, which does not require estimates of all of the parameters and states of the full-order model. To this end, we divide the full-order model into two subsystems, one of which is modified to approximate the full-order model. We show that the suggested method drives the HIV patient state into the LTNP region of attraction. This article is organized as follows. First, the problem under consideration is formulated, and a description of the HIV infection model is provided. Then, measurement methods for the states of the HIV model are surveyed. Subsequently the HIV infection model is modified to yield a reduced-order model. Finally, two control strategies based on this modified model are presented along with simulation results. The article concludes with a discussion and ideas for future work. View full abstract»

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  • Functional Electrical Stimulation

    Page(s): 40 - 50
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    It is important to evaluate closed-loop FES (functional electrical stimulation) control systems using standard time- and frequency-domain performance metrics to facilitate the discussion of results between research groups. Moreover, uniform reporting of the performance of control methods expedites the process of developing clinically useful controllers by concentrating research efforts on promising control designs. In this article, we have focused on FES applications that benefit individuals who have spinal cord injury. However, this technology is also used for rehabilitation after stroke and traumatic brain injury and can potentially be useful for managing the effects of other neuromuscular diseases and conditions. View full abstract»

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  • Real-time indoor autonomous vehicle test environment

    Page(s): 51 - 64
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    To investigate and develop unmanned vehicle systems technologies for autonomous multiagent mission platforms, we are using an indoor multivehicle testbed called real-time indoor autonomous vehicle test environment (RAVEN) to study long-duration multivehicle missions in a controlled environment. Normally, demonstrations of multivehicle coordination and control technologies require that multiple human operators simultaneously manage flight hardware, navigation, control, and vehicle tasking. However, RAVEN simplifies all of these issues to allow researchers to focus, if desired, on the algorithms associated with high-level tasks. Alternatively, RAVEN provides a facility for testing low-level control algorithms on both fixed- and rotary-wing aerial platforms. RAVEN is also being used to analyze and implement techniques for embedding the fleet and vehicle health state (for instance, vehicle failures, refueling, and maintenance) into UAV mission planning. These characteristics facilitate the rapid prototyping of new vehicle configurations and algorithms without requiring a redesign of the vehicle hardware. This article describes the main components and architecture of RAVEN and presents recent flight test results illustrating the applications discussed above. View full abstract»

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  • Scanning Probe Microscopy

    Page(s): 65 - 83
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    This article describes new perspectives on SPM-related science and technology, based on systems and control theory. These perspectives have led to a better understanding of SPM technology, overcome hurdles that limited the efficacy of SPM, and resulted in new modes of SPM-based interrogation. ThNcAFM, based on systems principles, has made it possible to image with resolution as high as 0.25 Aring in ambient conditions. The orders-of-magnitude improvements achieved in areas such as precision positioning, sample imaging, and sample detection rates emphasize the potential of systems tools in nanotechnology. The concept of using models in online operation has significant potential for SPM. For instance, TF-AFM, which uses models for online operation, resolves competing objectives of high resolution and detection rate by using a design from a systems perspective that makes detection bandwidth independent of the quality factor of the probe and, therefore, independent of resolution. The systems perspective also facilitates the interpretation of data since it provides a precise means for delineating the effects of the inherent dynamics of the interrogation system from the properties of the sample being probed. Devices such as SPMs are sensitive to operating conditions, ambient conditions, and modeling inaccuracies. Modern control theory provides a framework where such challenges can be effectively addressed. This aspect translates to reliable experiments in terms of repeatability, which is crucial in many nanoscience studies. View full abstract»

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  • Conference Report

    Page(s): 84 - 86
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  • Impulsive and Hybrid Dynamcial Systems: Stability, Dissipativity and Control (W.M. Haddad et al.; 2008) [Bookshelf]

    Page(s): 87 - 88
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    The stated objective of this book is to "develop a unified analysis and control design framework for impulsive and hybrid dynamical systems using a Lyapunov and dissipative systems approach." The book is organized into 13 chapters and includes an appendix section. Some of the topics covered include: stability theory for time-variant and time-varying impulsive systems; extending the notion of dissipative dynamical systems to impulsive dissipative dynamical systems; vector dissipativity for large-scale nonlinear impulsive dynamical systems; the stability of feedback interconnections of dissipative impulsive dynamical systems; qualitative analyses of special classes of impulsive hybrid feedback control systems; disturbance rejection control and robust control for nonlinear impulsive dynamical systems with bounded exogenous disturbances; and Poincare's theorem adapted to left-continuous dynamical systems. This book fills a void in the area of systems research and is a welcome addition to the literature on hybrid and impulsive systems. The book is well-organized, well written, and rigorous in the development of the subject on hand. It would be of great use to many researchers within the control systems community and could be used as the basis for a graduate course om control systems. View full abstract»

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  • Anthony J. Pritchard (1937-2007) [Obituary]

    Page(s): 90 - 91
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  • Conference Calender

    Page(s): 92 - 101
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  • CSS Page

    Page(s): 102
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  • Random Inputs

    Page(s): 104
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Aims & Scope

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

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Richard D. Braatz
braatz@mit.edu