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Proceedings of 35th IEEE Conference on Decision and Control

13-13 Dec. 1996

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  • Proceedings of the 36th IEEE Conference on Decision and Control

    Publication Year: 1996, Page(s):0_3 - 0_6
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    Freely Available from IEEE
  • Modelling and optimization for a type of fuzzy nonlinear programming problems in manufacturing systems

    Publication Year: 1996, Page(s):4401 - 4405 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A model for a type of fuzzy nonlinear programming problems (FNP) is proposed. This paper develops an inexact approach to solve this type model of nonlinear programming problems. Instead of finding an exact optimal solution. This approach uses a genetic algorithm (GA) with mutation along the weighted gradient direction to find a family of solutions with acceptable membership degrees. Then by means ... View full abstract»

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  • Model comparison and simplification

    Publication Year: 1996, Page(s):3958 - 3963 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    In this paper we study the comparison and simplification of models given as linear fractional transformations on structured operator sets. Previous simplification results have generalised the method of balanced truncation to such models, including the computation of error bounds, based on solutions to linear matrix inequalities (LMIs). In this paper we show that the previously obtained error bound... View full abstract»

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  • Mixed time/frequency-domain based robust identification

    Publication Year: 1996, Page(s):4196 - 4201 vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    In this paper we propose a new robust identification framework that combines both frequency and time-domain experimental data. The main result of the paper shows that the problems of establishing consistency of the data and of obtaining a nominal model and bounds on the identification error can be recast as a constrained finite-dimensional convex optimisation problem that can be efficiently solved... View full abstract»

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  • An LMI approach to fixed order LTR controller

    Publication Year: 1996, Page(s):4769 - 4771 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    In this paper the problem of optimal ℋ norm approximation of an LTR controller with specified poles is considered. A structurally predefined fixed order LTR controller is introduced which has the same dimension as the number of transmission zeros. It is shown that the design problem can be reduced into an equivalent convex optimization problem involving LMI which can be solv... View full abstract»

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  • Time-optimal motion of five-port valve pneumatic actuators

    Publication Year: 1996, Page(s):4713 - 4714 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    This article addresses the problem of time-optimal motions for five-port valve pneumatic actuators. By using Pontryagin's maximum principle, we formally demonstrate that the time-optimal motion of the drive occurs for bang-bang controls on the orifice. We find the switch times on the valve that will produce particular motion for the drive to a desired final position time-optimally View full abstract»

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  • Fuzzy Petri net-based optimum scheduling of FMS with human factors

    Publication Year: 1996, Page(s):4451 - 4452 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    This paper presents a fuzzy Petri net used to model a flexible manufacturing system (FMS) with human factors. The human factors discussed are the total operation time, the product quality and the labor cost. The optimum schedule for the FMS is determined using the fuzzy reasoning algorithm. The discussion focusses on the basic ideas of how to use fuzzy Petri nets to model and schedule a FMS with h... View full abstract»

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  • Model predictive control: breaking through constraints

    Publication Year: 1996, Page(s):3932 - 3937 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Because it naturally and explicitly handles constraints, particularly control input saturation, model predictive control (MPC) is a potentially powerful approach for nonlinear control design. However, nonconvexity of the nonlinear programs involved in the MPC optimization makes the solution problematic. Extending the concept of solving the Hamilton-Jacobi-Bellman equation backwards (the so-called ... View full abstract»

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  • Properties of zeros of a discrete-time system with fractional order hold

    Publication Year: 1996, Page(s):4339 - 4344 vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    This paper is concerned with the properties of zeros of discrete-time systems which are composed of a hold, a continuous-time plant and a sampler in cascade. Here the fractional order hold is applied as the hold. The properties of the zeros are explored in the limiting cases when the sampling period tends to zero or infinity. The stability conditions of the zeros for sufficiently small or large sa... View full abstract»

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  • Existence of solutions to the Poisson equation in Lp spaces

    Publication Year: 1996, Page(s):4190 - 4195 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    This paper presents two approaches to the problem of existence of solutions to the Poisson equation (PE) for a (Markov) transition probability. The first approach is an extension of the successive approximations algorithm of stochastic control theory. The second one is an algebraic approach based on the generalized Farkas theorem and it gives necessary and sufficient conditions for the existence o... View full abstract»

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  • Nonlinear control of induction motors: the observed field oriented control scheme

    Publication Year: 1996, Page(s):4707 - 4712 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    In this paper, we modify the standard field-oriented control (FOG) transformations to facilitate the design of an adaptive observed field-oriented control (OFOC) scheme which is free of singularities, does not require rotor flux measurements, and provides for simultaneous rotor flux tracking/rotor position tracking. Specifically, given measurements of rotor position, rotor velocity, and stator cur... View full abstract»

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  • Control Lyapunov functions: new ideas from an old source

    Publication Year: 1996, Page(s):3926 - 3931 vol.4
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    A control design method for nonlinear systems based on control Lyapunov functions and inverse optimality is analyzed. This method is shown to recover the LQ optimal control when applied to linear systems. More generally, it is shown to recover the optimal control whenever the level sets of the control Lyapunov function match those of the optimal value function. The method can be readily applied to... View full abstract»

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  • Robust adaptive control of nonlinear output-feedback systems under bounded disturbances

    Publication Year: 1996, Page(s):4753 - 4758 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper presents a robust adaptive control algorithm for nonlinear output-feedback systems under bounded disturbances based on a dead-zone modification. The algorithm guarantees the boundedness of all the variables of systems with arbitrary relative degrees under the minimum phase assumption View full abstract»

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  • Minimum-phase criteria for sampled systems via symbolic approach

    Publication Year: 1996, Page(s):4333 - 4338 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    In this paper, we propose a symbolic approach to determine the sampling-time range which guarantees minimum-phase behaviours for a sampled system with a zero-order hold. By using Maple, a symbolic manipulation package, the symbolic transfer function of the sampled system, which contains sampling time T as an independent variable, can be easily obtained. We then adopt the critical stability constra... View full abstract»

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  • An initial state learning method for iterative learning control of uncertain time-varying systems

    Publication Year: 1996, Page(s):3996 - 4001 vol.4
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    In iterative learning control (ILC), a common assumption is that the initial states in each repetitive operation should be inside a given ball centred at the desired initial states which may be unknown. This assumption is critical to the stability analysis and the size of the ball will directly affect the final output trajectory tracking errors. In this paper, this assumption is removed by using a... View full abstract»

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  • SM identification of approximating models for H robust control

    Publication Year: 1996, Page(s):4184 - 4189 vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Set membership (SM) H identification of mixed parametric and nonparametric models is investigated, which aims to estimate a low order approximating model and an identification error, giving a measure of the unmodeled dynamics in a form well suited for H control methodologies. In particular, the problem of estimating the parameters of the parametric part and the... View full abstract»

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  • A general class of sliding surface for sliding mode control

    Publication Year: 1996, Page(s):4597 - 4598 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    In the conventional sliding mode control, the relative degree of the chosen sliding surface is usually one. This paper addresses a general class of sliding surface whose relative degree is no longer restricted to one. We show that when the relative degree is more than two, it is inevitable that there will exist a limit cycle for the nonlinear sign function. For the case of relative degree two, the... View full abstract»

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  • Trajectory approximation based adaptive control for nonlinear systems under matching conditions

    Publication Year: 1996, Page(s):4667 - 4672 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Uncertain nonlinear systems affine in the input are considered. It is shown that under some matching conditions these systems can be made practically stable by state feedback. We present an adaptive hybrid algorithm which renders the origin practically stable to any desired accuracy. The presented algorithms are simple and computationally cheap View full abstract»

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  • Robustness analysis: nonlinear and growing

    Publication Year: 1996, Page(s):3921 - 3925 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A numerical algorithm for analysis of disturbance rejection for nonlinear systems is proposed. The algorithm seeks solutions to Euler-Lagrange equations and is similar to power algorithms for mu-analysis lower bounds, beating conventional optimization on speed and global convergence properties. This is a special case of earlier work and focuses on a problem for which a simple proof of global conve... View full abstract»

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  • Discrete-time adaptive control of feedback linearizable nonlinear systems

    Publication Year: 1996, Page(s):4747 - 4752 vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    For a class of multi-input multi-output (MIMO) discrete-time nonlinear systems, an adaptive controller or self tuning regulator (STR) which feedback linearizes the system is presented. The structure of the adaptive controller is derived using a filtered error notions and passivity approach. A uniform ultimate boundedness of the closed-loop system is given in the sense of Lyapunov. The notions of d... View full abstract»

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  • A deterministic approach to the design of robust predictors

    Publication Year: 1996, Page(s):4331 - 4332 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    This paper is concerned with the problem of robust prediction for a class of uncertain systems with noise and uncertainty modeled deterministically. The main result shows that the set of possible states at time T, given the measurements up to a time T-q is an ellipsoid. The set is constructed by solving a Riccati difference equation View full abstract»

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  • Solution of the l1 MIMO control problem without zero interpolation

    Publication Year: 1996, Page(s):4040 - 4045 vol.4
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The aim of this paper is to provide a new approach for the solution for the l1 optimal control problem in the MIMO case which avoids zero interpolation in the numerical solution. While exact optimal solutions may not be computed, solutions which are arbitrarily close to optimal are obtained. Duality theory is utilized to provide converging upper and lower bounds for the optimal l... View full abstract»

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  • Wave control of a class of flexible beams by an idea of imaginary beam

    Publication Year: 1996, Page(s):4228 - 4233 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This paper proposes a method of wave control for a class of uniform flexible beams by introducing an idea of a fictitious beam with finite length and distributed damping. This beam is assumed to be connected serially at the free-end of the real beam of interest, and its function is to act as an absorber to absorb the energy conveyed by travelling waves. For the damping force two kinds of damping t... View full abstract»

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  • Robust eigenstructure assignment under regional pole constraints

    Publication Year: 1996, Page(s):3600 - 3605 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This paper provides a computational procedure for a type of robust regional pole assignment problem. It allows the closed-loop poles to be settled at certain perturbation insensitive locations within some prespecified regions in the complex plane. The novelty of our approach lies in the versatility of the proposed algorithm which provides a rich set of constrained regions for the assignment of ind... View full abstract»

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  • A reduced order method for control of fluid flows

    Publication Year: 1996, Page(s):3705 - 3710 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    This article presents a reduced order method for simulation and control of fluid flows. The major advantage of this method over others, such as finite element, finite difference or spectral method is that it has fewer degrees of freedom. The present methodology's feasibility for flow control is demonstrated on two boundary control problems. The first one is a velocity tracking problem in cavity fl... View full abstract»

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