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Control Applications, 1997., Proceedings of the 1997 IEEE International Conference on

Date 5-7 Oct. 1997

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  • Proceedings of the 1997 IEEE International Conference on Control Applications

    Publication Year: 1997
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    Freely Available from IEEE
  • Index of authors

    Publication Year: 1997, Page(s):xxiv - xxvix
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    Freely Available from IEEE
  • Nonlinear Dynamic Modelling Of Automotive Engines Using Neural Networks

    Publication Year: 1997, Page(s):408 - 410
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (295 KB)

    This paper presents some efforts on using neural networks to identify nonlinear dynamic models of the manifold pressure and the mass flow processes in automotive engines. Eternal recurrent neural networks are used for dynamic mapping. The dynamic Levenberg-Marquardt algorithm is applied to the weight-estimation. Early results indicate that the neural network based modeling of the manifold dynamics... View full abstract»

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  • Optimal active suspension design via convex analysis

    Publication Year: 1997, Page(s):411 - 416
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    In this note the design of active suspension control is approached in a Youla parametrization setting, leading to dynamic output feedback controllers calculated by convex optimization. The controllers so designed have the following advantages over the usual ones: (i) they do not require the availability of the full states vector; (ii) the optimization problem may be cast in a true multiobjective f... View full abstract»

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  • A numerical method for design of PI controllers

    Publication Year: 1997, Page(s):417 - 422
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (583 KB)

    This paper presents an efficient numerical method to design PI controllers. The design is based on optimization of the load disturbance rejection, with constraints on the sensitivity and weighting of the set point response. Thus, the formulation of the design problem captures many aspects of industrial control problems. It leads to a nonconvex optimization problem. Efficient ways to solve the prob... View full abstract»

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  • Optimization-based job shop scheduling with transfer lots

    Publication Year: 1997, Page(s):423 - 428
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (713 KB)

    Effective scheduling of lots is critical for the production of mid to high volume products. Compared to traditional lot production, using transfer lots can significantly reduce manufacturing lead times and lower work-in-process (WIP) inventory levels. This paper presents a novel integer programming formulation with separable structure and an optimization-based solution methodology for job shop sch... View full abstract»

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  • Mixed-model assembly line scheduling using the Lagrangian relaxation technique

    Publication Year: 1997, Page(s):429 - 434
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (695 KB)

    The increasing market demand for product variety forces the manufacturers to design a mixed-model assembly line on which different model products can be switched quickly to satisfy diversified demand. Scheduling is critical to generate a sequence of different products to meet due dates and to avoid possible component shortage or starvation. Because of the combinatorial nature of integer programmin... View full abstract»

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  • Realistic determination of the optimal size and location of piezoelectric actuator/sensors

    Publication Year: 1997, Page(s):435 - 440
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (610 KB)

    We address the problem of obtaining the optimal size and location of piezoelectric actuator/sensors. An optimization problem is formulated for a general beam which can be subject to any boundary and may have as many piezoelectric patches as needed. The proposed optimization criterion is based on the beam modal cost and modal controllability. By adding a penalty term to the criterion, the size of t... View full abstract»

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  • Discrete-time well-conditioned observer design for two-output systems

    Publication Year: 1997, Page(s):441 - 444
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (853 KB)

    It has been shown previously that the robustness of deterministic observers with respect to modeling errors, measurement bias and roundoff errors can be represented by a single performance index, κ 2(P), the condition number of the observer eigenvector matrix. In this paper, based on the performance index, a robust observer design method is proposed for two-output systems where th... View full abstract»

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  • Active control of suspensions for a gravitational wave detector

    Publication Year: 1997, Page(s):451 - 456
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (473 KB)

    This paper deals with large-scale gravitational-wave detector control. This detector is a laser illuminated large-scale interferometer which uses multiple optical elements and senses displacements as small as 10 -18m produced by gravitational waves. To make the detector operant, the variations of the cavities lengths must be sensed and corrected. The optical cavities are composed by mir... View full abstract»

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  • Robust regulation of temperature in a fluidized bed reactor via uncertainty estimation

    Publication Year: 1997, Page(s):457 - 459
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (574 KB)

    The proposed strategy comprises two parts: (a) an input-output linearizing feedback control law and (b) an uncertainties dynamic estimator. The main idea is to lump the uncertainties in a nonlinear function which can be interpreted as a variable state in an externally dynamically equivalent system. The dynamics of this state can be reconstructed from output measurements. In such way that an estima... View full abstract»

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  • Flight system design: robust control and accommodation of failures

    Publication Year: 1997, Page(s):463 - 468
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (641 KB)

    The goal of this presentation is to introduce new procedures for designing robust controllers for aircraft. The vehicle performs over a large variety of mission phases, flight and environmental conditions. Existing models have a limited capability for modeling of vehicles. Specifically, current models do not adequately model aerodynamics, environmental effects, flexible modes, disturbances, bifurc... View full abstract»

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  • Robust pole region assignment of linear structured uncertain systems with first order compensators

    Publication Year: 1997, Page(s):469 - 470
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (202 KB)

    This paper presents a method of designing the first order compensator to place the closed-loop poles of the linear structured uncertain system inside a specified region. The compensator parameters are obtained such that the eigenvalues of the closed-loop system belong to the desired eigenvalues under all admissible parameter variations. It turns out that the relations are easily computable and the... View full abstract»

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  • Robust pole-zero region assignment for structured linear multivariable uncertain systems

    Publication Year: 1997, Page(s):471 - 474
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB)

    Presents a method of designing the state feedback matrix based upon the relationship between the open-loop and closed-loop poles and zeros of the given structured linear MIMO uncertain system. The state feedback matrix is obtained such that the poles and zeros of the closed-loop uncertain system belong to the desired poles and zeros under all admissible parameter variations. A numerical example il... View full abstract»

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  • Rejecting disturbances to flexible structures using PI Kalman filters

    Publication Year: 1997, Page(s):475 - 477
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (351 KB)

    The proportional Kalman filter (PKF) is formulated with integral action and generalized to the proportional-integral Kalman filter (PIKF). The PIKF can be utilized to improve the disturbance rejection property of the Kalman filter-based controller. Through extensive simulations, as applied to the lightly damped flexible structure of the 1992 ACC Benchmark, we show that the integral term of the PIK... View full abstract»

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  • H/sub 2/ dissipative controllers for non-positive systems

    Publication Year: 1997, Page(s):478 - 483
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    This paper describes a method of designing strictly dissipative observer-based controllers insuring an H 2 suboptimal constraint on the closed-loop system. We give an LMI (linear matrix inequalities) based solution to this problem and show how it can be useful for robust control of flexible structures with non-collocated actuators and sensors. One example is given in order to illustrate... View full abstract»

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  • Some stability domains for delayed linear systems with saturating controls

    Publication Year: 1997, Page(s):484 - 489
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (537 KB)

    Concerns local stabilization, independent of time-varying delay, for a class of linear time-delay systems with constrained controls, via a dynamic output feedback law using a saturated controller built from a minimal-order observer. A stability condition and an algorithm allowing the determination of some domains, in which the trajectories of the time-delay saturated system are positively invarian... View full abstract»

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  • Fault diagnosis in a hydraulic process using unknown input observers

    Publication Year: 1997, Page(s):490 - 495
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (393 KB)

    In this paper, an approach for the design of unknown input observers is developed to estimate the state of a linear time-invariant dynamical system driven by both known and unknown inputs. The method has been applied on a real hydraulic installation in order to detect and localize actuator faults. View full abstract»

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  • State-space identification of nonlinear flight dynamics

    Publication Year: 1997, Page(s):496 - 498
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (307 KB)

    A new identification concept is offered in this paper, and it is shown how to identify the unknown parameters of nonlinear flight dynamic systems assuming that a generic nonlinear model is known. To ensure robustness and parameter convergence, nonlinear error mappings are used, and the Lyapunov second method is employed to approach the analysis of convergence. The explored method is applied to a l... View full abstract»

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  • Identification and tracking control of aircraft from real-time perspectives

    Publication Year: 1997, Page(s):499 - 504
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (577 KB)

    Presents a new conceptual framework for control-oriented system identification and constrained optimization of advanced aircraft from completely automated, real-time implementation perspectives. To identify the unknown parameters, we begin by describing the aircraft longitudinal-lateral dynamics utilizing the available augmented models. The control-oriented system identification is based on the le... View full abstract»

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  • Parameters nonlinear identification for vehicle's model

    Publication Year: 1997, Page(s):505 - 510
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB)

    This paper examines part of a driving advice system developed by the ProArt France team (part of the European Eureka Prometheus programme). The least-squares identification of parameters for a nonlinear vehicle model is presented. We also discuss the uniqueness of the system representation (identifiability) and sensitivity functions for determining the effects of parameter changes on the response ... View full abstract»

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  • Sensitivity of the continualization of poles and its effect in system identification

    Publication Year: 1997, Page(s):511 - 516
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    In a continuous-time parameter identification process which uses a digital data acquisition system, the form in which the discrete-time model of the dynamic system is represented influences the performance of the estimation process. In this paper, it is shown that alternatives to the conventional representation of discrete-time systems, which uses the z operator, possess pole-transformation sensit... View full abstract»

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  • An observer for the estimation of the inductance harmonics in a permanent-magnet synchronous machine

    Publication Year: 1997, Page(s):517 - 521
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (453 KB)

    It is well-known that buried permanent-magnet synchronous machines have inductances with high-order harmonics. These inductance variations are due to nonsinusoidal field distributions and lead to torque pulsations. In this paper, we use an observer to estimate these harmonics. The effectiveness of the proposed method is investigated through computer simulations, and experimental results highlight ... View full abstract»

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  • Estimation of suspension parameters

    Publication Year: 1997, Page(s):522 - 527
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (437 KB)

    In recent years, many attempts have been made to develop an active or semi-active suspension control algorithm to reduce dynamic tire forces in automobiles. Many of these studies were developed in a laboratory environment and with known damper characteristics. The challenge of this paper is to estimate the parameters of a real test car, such as the mass of the vehicle, the spring coefficient and t... View full abstract»

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  • New robust adaptive algorithm for multichannel adaptive active noise control

    Publication Year: 1997, Page(s):528 - 533
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    The adaptive active noise control problem of a multichannel system is studied. The general structure of the multichannel active noise control system is clarified and the perfect cancellation condition by feedforward control is analyzed. A new LMS type of robust multichannel adaptive algorithm for updating the feedforward controllers is proposed which can assure the stability of the adaptation and ... View full abstract»

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