IEEE Transactions on Control Systems Technology

Issue 1 • Mar 1994

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Displaying Results 1 - 8 of 8
  • Application of some new tools to robust stability analysis of spark ignition engines: a case study

    Publication Year: 1994, Page(s):22 - 30
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (796 KB)

    An analysis of the stability of a spark ignition engine is carried out to demonstrate the applicability of some new tools for robustness analysis. First, a brief introduction to the model of the engine at idle speed is provided. Then, frequency domain characterizations of both the engine and the controller are seen to depend on a set of uncertain parameters. Based on physical realizability conside... View full abstract»

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  • Dynamical discontinuous feedback strategies in the regulation of nonlinear chemical processes

    Publication Year: 1994, Page(s):11 - 21
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (820 KB)

    In this article, a unified approach is proposed for the design of dynamical discontinuous feedback controllers leading to the chattering-free stabilization of nonlinear single-input single-output systems describing chemical processes. The adopted framework is that of a generalized state representation form of the given nonlinear plant. Use is made of the associated generalized observability canoni... View full abstract»

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  • Experimental results of a high speed robotic autoloader for a howitzer

    Publication Year: 1994, Page(s):2 - 10
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    The dynamics of robots are characterized as multi-degree-of-freedom and nonlinear. Relatively few control algorithms have been implemented in real-time applications where one must consider: unmodelled dynamics, robustness, noise, stiction, backlash, actuator nonlinearity, saturation, time varying effects, power usage, computational requirements, and development cost. This paper describes the exper... View full abstract»

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  • Practical issues in robust identification

    Publication Year: 1994, Page(s):54 - 56
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The recent area of robust identification plays an important role in the application of robust control techniques to practical problems. Although the theory has been developed for linear, time invariant, stable plants, in practical applications very seldom we find such classes of systems. To apply these methods in practical situations (possibly nonlinear, time varying and/or unstable plants), the e... View full abstract»

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  • Describing function-based analysis of a nonlinear hydraulic transmission line

    Publication Year: 1994, Page(s):31 - 35
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    This paper presents an analytical method of predicting and eliminating limit cycle conditions in hydraulic drive systems, where backlash in the actuator seal is the dominant nonlinearity. It is shown that limit cycle conditions are a strong function of certain plant parameters. The elimination of limit cycle conditions may thus be achieved by the alteration of certain inherent plant parameters. Fl... View full abstract»

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  • Nonlinear differential-geometric techniques for control of a series DC motor

    Publication Year: 1994, Page(s):35 - 42
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The problem of controlling a series DC motor using only current measurements is considered. It is shown that both speed and load-torque may be estimated from the current measurements. Two nonlinear feedback laws are considered based on feedback linearization and input-output linearization, respectively. Both of these control laws require knowledge of the speed and load-torque. The speed/torque est... View full abstract»

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  • Relay feedback auto-tuning of cascade controllers

    Publication Year: 1994, Page(s):42 - 45
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    It is shown that the relay feedback auto-tuning technique can be extended to auto-tune cascade controllers. The use of the relay allows the tuning of the secondary loop to be done without necessarily placing the primary controller in manual mode. It also turns out that the relative speeds of the loops in cascade can be derived from the limit cycle oscillations obtained from relay feedback auto-tun... View full abstract»

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  • Six degree-of-freedom active vibration control using the Stewart platforms

    Publication Year: 1994, Page(s):45 - 53
    Cited by:  Papers (83)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    Multiple degree-of-freedom (DOF) vibration control systems are essential for precision control of a wide range of Space-borne structures as well as earth-based systems. This paper studies the design and control problems of a class of multiple DOF vibration isolation systems using the concept of a Stewart truss and Stewart platform mechanism. A novel geometric arrangement of a Stewart platform, cal... View full abstract»

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Andrea Serrani
Department of Electrical and Computer Engineering
The Ohio State University
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