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IEE Proceedings - Control Theory and Applications

Issue 2 • Date Mar 2000

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Displaying Results 1 - 13 of 13
  • Crisp-type fuzzy logic controller using Dubois and Prade's parametric t-norm-sum-gravity inference methods

    Publication Year: 2000, Page(s):167 - 175
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (640 KB)

    The input/output relationship of a class of crisp-type fuzzy logic controllers (FLCs) using parametric t-norm-sum-gravity inference method is examined. The explicit mathematical form of reasoning surface using Dubois and Prade's parametric t-norm is addressed. Reasoning surfaces of crisp-type FLCs are proved to be composed of a two-dimensional multilevel relay and a local position-dependent nonlin... View full abstract»

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  • Robust state estimator of stochastic linear systems with unknown disturbances

    Publication Year: 2000, Page(s):224 - 228
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    The design of a filtering algorithm when an unknown disturbance exists is described. An alternative method to solve the disturbance estimation problem is proposed, which is to reformulate it to a tracking problem by using the relation of the filter update. The reformulation of the problem makes it possible to use an effective sliding surface and fast estimate against arbitrary disturbance. A distu... View full abstract»

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  • Geometric analysis of missile guidance command

    Publication Year: 2000, Page(s):205 - 211
    Cited by:  Papers (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (468 KB)

    An approach is followed for analysing flight control command for tactical missile guidance with a variable manoeuvering target. The moving orthogonal coordinate system of classical differential geometry curve theory is similar to the stability axis system utilised in atmospheric flight mechanics. Based on this similarity, the Frenet-Serret formula is used to study the characteristics of a pseudomi... View full abstract»

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  • Disturbance attenuation in linear systems via dynamical compensators: a parametric eigenstructure assignment approach

    Publication Year: 2000, Page(s):129 - 136
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (596 KB)

    A simple approach is proposed for disturbance attenuation in multivariable linear systems via dynamical output compensators based on complete parametric eigenstructure assignment. The basic idea is to minimise the H2 norm of the disturbance-output transfer function using the design freedom provided by eigenstructure assignment. For robustness, the closed-loop system is restricted to be ... View full abstract»

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  • Robust fuzzy control for robot manipulators

    Publication Year: 2000, Page(s):212 - 216
    Cited by:  Papers (19)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    A robust fuzzy control is developed for robot manipulators to guarantee both global stability and performance. Robot dynamics under consideration may include large nonlinear uncertainties, such as nonlinear load variations and unmodelled dynamics. Fuzzy sets are chosen based on performance requirements and stability regions of the control system. For each fuzzy set, a sub-control is designed based... View full abstract»

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  • Restricted-structure LQG optimal control for continuous-time systems

    Publication Year: 2000, Page(s):185 - 195
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (740 KB)

    A novel LQG optimal-control problem is developed for continuous-time systems, where the structure of the controller is assumed to be fixed a priori. The controller may be chosen to be of reduced order, lead/lag or PID forms, and the optimal causal controller is required to minimise the usual LQG cost index. The theoretical problem considered is to obtain the causal, stabilising, controller, of a p... View full abstract»

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  • Observer-based neuro identifier

    Publication Year: 2000, Page(s):145 - 152
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB)

    A new online identification method is presented. The identified nonlinear systems have partial-state measurement. Their inner states, parameters and structures are unknown. The design is based on the combination of a model-free state observer and a neuro identifier. First, a sliding mode observer, which does not need any information about the nonlinear system, is applied to obtain the full states.... View full abstract»

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  • Adaptive iterative learning control of uncertain robotic systems

    Publication Year: 2000, Page(s):217 - 223
    Cited by:  Papers (58)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB)

    A distinct feature of the proposed AILC scheme is that uncertain parameters are estimated in the time domain whereas repetitive disturbances are identified and compensated in the iteration domain. The bounds of the parameters are not required to be known a priori, and the learning control gain can be adjusted independently of the parameter adaptation gain. The overall closed-loop stability and uni... View full abstract»

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  • Control of state-constrained linear dynamical systems: anti-reset windup approach

    Publication Year: 2000, Page(s):159 - 166
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (720 KB)

    An alternative controller design method for state-constrained control systems is presented, where the concept of the anti-reset windup (ARW) strategies is used. The proposed controller design procedure is composed of two steps. First, a linear controller is designed to show a desirable nominal performance by ignoring state constraints. Then, an additional compensator is designed to mitigate the ad... View full abstract»

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  • ANNNAC-extension of adaptive backstepping algorithm with artificial neural networks

    Publication Year: 2000, Page(s):177 - 183
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (488 KB)

    The adaptive backstepping algorithm is a well-known scheme for the design of nonlinear adaptive controllers. The two main drawbacks associated with this algorithm are that the nonlinear system must be linearly parameterised in the unknown or uncertain parameters and that the nonlinear functions must be exactly known. To avoid these problems, an extension of the backstepping algorithm with a specif... View full abstract»

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  • Process identifier and its application to industrial control

    Publication Year: 2000, Page(s):196 - 204
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (740 KB)

    Many industrial controllers use the relay experiment to estimate the system ultimate data for three-term controller tuning. However, for some systems the relay experiment describing function analysis can produce poor estimates. The paper reports a new and more accurate method of finding system frequency response data including the system ultimate data. A full demonstration of the accuracy attainab... View full abstract»

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  • Receding horizon H predictive control for systems with input saturation

    Publication Year: 2000, Page(s):153 - 158
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    A receding horizon H predictive control method is derived by solving a min-max problem in nonrecursive form. The min-max cost index is converted to a quadratic form which, for systems with input saturation, can be minimised using quadratic programming (QP). Stability conditions and H norm bounds on disturbance rejection are obtained. Without input saturation, st... View full abstract»

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  • Stabilisation of discrete-time interconnected systems under control constraints

    Publication Year: 2000, Page(s):137 - 144
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (544 KB)

    The problem of stabilising a discrete-time large-scale uncertain system where the norms of the decentralised controls are bounded by prespecified constants is considered. The uncertainty is supposed to be cone-bounded, but not necessarily matched. A nonlinear controller is proposed, which guarantees the exponential stability of the whole system, if the bounds of uncertainties are not too large. If... View full abstract»

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