Proceedings of the International Conference on Control Applications

18-20 Sept. 2002

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  • Proceedings of the 2002 IEEE International Conference on Control Applications (Cat. No.02CH37330)

    Publication Year: 2002
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    Freely Available from IEEE
  • Modelling the focus error characteristic of a DVD player

    Publication Year: 2002, Page(s):629 - 630 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (157 KB) | HTML iconHTML

    This paper presents a new approach to focus error modelling in a DVD player, applied to an industrial system, developed in STMicroelectronics laboratories. First, two mathematical models, based on astigmatic method and on opto-geometrical analysis, are given. A numerical model is given too. Then a curve fitting method is applied, using real data from the industrial system, in order to estimate the... View full abstract»

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  • A note on feedback linearizing control for open-channel hydraulic systems

    Publication Year: 2002, Page(s):675 - 680 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (314 KB) | HTML iconHTML

    Open channel flow systems are known to be described by non-linear partial differential equations (Saint-Venant equations), but a simple finite-dimensional model has been successfully developed for control purposes in a previous work, using a collocation method. In particular, a control law based on Input/Output linearization has been proposed on this basis. In the present note, it is pointed out h... View full abstract»

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  • Zoom-based head tracker in complex environment

    Publication Year: 2002, Page(s):725 - 730 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (469 KB) | HTML iconHTML

    In this paper, we establish a nearly real-time surveillance tracking system, which is able to detect any person who intrudes to a prohibited area and lock his head image at the scene center. The entire underlying algorithm consists of a motion detector, an elliptical head tracking algorithm, auto-zooming ability, and a VPDA filter which is modified by probabilistic data association filter (PDA fil... View full abstract»

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  • Who's intelligent? Wheelchair, driver or both?

    Publication Year: 2002, Page(s):760 - 765
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (422 KB) | HTML iconHTML

    Intelligent wheelchair control has been a topic for many research projects in recent years, but few developments have been successfully transferred from the research to service or commercial domains. This paper addresses some of the reasons for the failure of technology transfer, and offers suggestions for more successful exploitation of research effort in the future. The paper illustrates the key... View full abstract»

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  • A robust adaptive fuzzy control applied to disturbed uncertain MIMO systems

    Publication Year: 2002, Page(s):1038 - 1043 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB) | HTML iconHTML

    In this paper a robust adaptive fuzzy control for a class of disturbed uncertain multi-input multi-output systems is presented. Adaptive fuzzy systems are used to approximate the system. Effects of both the external disturbances and approximation errors are attenuated to a prescribed level using an H/sub /spl infin// controller. The adaptation and the control laws are improved to guarantee the bou... View full abstract»

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  • Third order trajectory generator satisfying velocity, acceleration and jerk constraints

    Publication Year: 2002, Page(s):1165 - 1170 vol.2
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (433 KB) | HTML iconHTML

    A third order continuous-time trajectory generator useful in motion control systems is presented. The proposed nonlinear system receives as input a standard reference signal r(t) (step, ramp, etc.) and provides as output a smooth signal x(t) satisfying the following constraints on velocity, acceleration and jerk: V/sub min/ /spl les/ x/spl dot/(t) /spl les/ V/sub max/, A/sub min/ /spl les/ x/spl u... View full abstract»

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  • Energy based model of a common rail injector

    Publication Year: 2002, Page(s):1195 - 1200 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (423 KB) | HTML iconHTML

    In order to develop a precise control of the fuel injection in diesel engines as a means to reduce noise and fuel consumption, while improving torque and power performances, a model of the fuel injection system is required. This paper proposes a simple energy-based model of a common rail injector, one of the most complex and important part of the injection system. The injector model has been valid... View full abstract»

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  • Stabilizing control design of fully linearizable systems via estimated states

    Publication Year: 2002, Page(s):1333 - 1338 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    This paper is concerned with the problem of designing stabilizing controllers for nonlinear systems using feedback linearization with estimated states. It is assumed that the systems under consideration are fully linearizable, but the full state is not completely accessible, so that an observer is included in the loop. Sufficient conditions are set to guarantee that the overall system trajectories... View full abstract»

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  • Chatter detection based on adaptive estimation of the fourth cumulant of the modeling error

    Publication Year: 2002, Page(s):1339 - 1344 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB) | HTML iconHTML

    This paper proposes a design method for chatter detection based on the fourth order statistics estimation applied to the modeling error. Usually, a test of hypothesis is built on an a priori knowledge of the statistical distribution. The frequency function is often assumed Gaussian. In the case of machining process without chatter, the Gaussian assumption is not valid. Consequently, the proposal o... View full abstract»

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  • General Index of Authors, Speakers & Chairs

    Publication Year: 2002, Page(s):1345 - 1351
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    Freely Available from IEEE
  • On the design of sampled-data model-reference control systems

    Publication Year: 2002, Page(s):886 - 891 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB) | HTML iconHTML

    Design rules for a sampled-data controller which forces a linear continuous-time SISO system to track the output of a reference model while minimizing the influence of stochastic disturbance based on the LQG problem formulation are presented, and its advantages against GPC are illustrated on examples. View full abstract»

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  • Internal interconnections in TMP processes

    Publication Year: 2002, Page(s):1010 - 1015 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (415 KB) | HTML iconHTML

    The casing pressure dynamics of a thermomechanical wood-chip refiner are studied in this paper. Interest focuses on the internal interconnections, which can cause oscillations in the process. Linear dynamics are considered when analysing the interconnected process from a process control perspective. Control strategies are discussed and a grey-box model for parameter estimation is derived and compa... View full abstract»

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  • An optimal control of marine propulsion system considering ship dynamics

    Publication Year: 2002, Page(s):1058 - 1063 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (406 KB) | HTML iconHTML

    This study investigates the optimal control of a marine propulsion system consisting of an engine, a propeller and ship's parts. First, each part of the system is analytically examined and the system is mathematically modeled. Next, the performance criterion to characterize the system performance is defined and the procedure of optimal trajectory formation is developed. Then, a new control scheme ... View full abstract»

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  • Integration and synchronization of discrete formalisms and continuous models in Modelica

    Publication Year: 2002, Page(s):1189 - 1194 vol.2
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (515 KB) | HTML iconHTML

    Many complex technical systems such as airplanes or chemical plants consist of hybrid physical components and purely discrete controllers. In order to aid the design process of such systems, some requirements have to be met as closely as possible: the hybrid physical and the discrete components have to be modeled vividly, the resulting components of the model have to be integrated intuitively into... View full abstract»

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  • A new simple and robust control strategy for wind farm reactive power regulation

    Publication Year: 2002, Page(s):880 - 885 vol.2
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (482 KB) | HTML iconHTML

    Since electrical systems endowed with variable generating units are called to dominate the electrical landscape in the near future, it is necessary to develop new tools that will allow working efficiently. In this forthcoming environment. Wind power generation is becoming one of the most important renewable energy sources. In Spain and, consequently, the simulation of wind farm power performance w... View full abstract»

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  • Control of average temperature in a spray deposition process

    Publication Year: 2002, Page(s):1004 - 1009 vol.2
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (474 KB) | HTML iconHTML

    The spray forming process is a novel method of rapidly manufacturing tools and dies for stamping and injection operations. The process sprays molten tool steel from a set of arc spray guns onto a ceramic former to build up a thick steel shell. The volumetric contraction that occurs as the steel cools is offset by a volumetric expansion taking place within the sprayed steel, which allows the dimens... View full abstract»

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  • Application of MPC with multiple objective for a solar refrigeration plant

    Publication Year: 2002, Page(s):1230 - 1235 vol.2
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (458 KB) | HTML iconHTML

    This paper presents a multiobjective model predictive control algorithm which allows the specification of different control goals at different operating points. The algorithm is illustrated with an application to a very detailed model of a solar cooling plant. The plant is used to cool down an office building with varying operating conditions. The plant is a nonlinear multivariable process subject... View full abstract»

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  • Calibratable model-based controllers

    Publication Year: 2002, Page(s):1056 - 1057 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (254 KB) | HTML iconHTML

    Model-based, multivariable controllers can be made calibratable by using linear parameter-varying techniques. This opens the venue to use model-based controllers which outperform classical controllers in the automotive industry without changing the traditional way of designing control systems for the industry. An illustrative example is presented. View full abstract»

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  • Direct control in bond graph by state estimated feedback for MIMO LTI systems

    Publication Year: 2002, Page(s):1183 - 1188 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (365 KB) | HTML iconHTML

    A state estimated feedback based on Bond Graphs for Multivariable Linear Time Invariant (LTI) Systems is proposed. A direct graphical technique (Bond Graph) to obtain the closed loop system in state variables using the open loop graph is presented. Structures for the controller and the observer directly in closed loop axe presented. Therefore, the control in the physical or in the Bond Graph domai... View full abstract»

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  • Design of remote environmental monitoring systems

    Publication Year: 2002, Page(s):856 - 861 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (431 KB) | HTML iconHTML

    In this paper, a remote environmental monitoring system with a simple network management protocol (SNMP) is developed. The development process is integrated based on the standard unified modeling language (UML) and the verifiable Petri-net model. Thus, the dynamic behavior of the remote monitoring system can be analyzed by using Petri-net theory. Finally, the system can be implemented by using Jav... View full abstract»

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  • Controller design for linear unstable systems with position and rate actuator saturation

    Publication Year: 2002, Page(s):874 - 879 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (435 KB) | HTML iconHTML

    This paper focuses on the stabilization problem of linear systems subject to control amplitude and rate saturation. The considered saturating actuator is a first order system subject to input saturation and speed saturation. Some conditions for the stability of the closed-loop system despite the occurrence of saturations are formulated in terms of matrix inequalities. The closed-loop performances ... View full abstract»

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  • Noise suppression in buffer-state iterative learning control, applied to a high precision wafer stage

    Publication Year: 2002, Page(s):998 - 1003 vol.2
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (418 KB) | HTML iconHTML

    Iterative learning control (ILC) has been proven to be very effective at suppressing repetitive errors in broad spectrum of applications. Ever increasing demands on performance in positioning systems have led to the need for more advanced control systems, like ILC, to achieve the desired performance. A major drawback of any ILC is that in general it will amplify any noise present in the measuremen... View full abstract»

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  • Application of predictive control to a toy helicopter

    Publication Year: 2002, Page(s):1225 - 1229 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (423 KB) | HTML iconHTML

    A toy helicopter makes for an impressive classroom control demonstration. However the challenge to obtain a robust, stable, multivariable controller is nontrivial given the nonlinear nature of the helicopter, the stochastic nature of the disturbances, and the performance limitations of PCs. This paper applies a model predictive controller using the Mathworks xPC target to obtain significantly impr... View full abstract»

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  • A neural network approach for freeway traffic flow prediction

    Publication Year: 2002, Page(s):984 - 989 vol.2
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (430 KB) | HTML iconHTML

    Traffic flow modeling is an essential component of any traffic control or monitoring system. This paper presents a new short term traffic flow prediction model based on a feedforward neural network. The structure determination of this neural network is viewed as a system identification problem, and the model performances are validated using both simulation and real traffic data obtained from the I... View full abstract»

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