Home
>
Journals & magazines
>
IEE Proceedings - Control Theory and Applications
>
Volume 149
Issue 6
IEE Proceedings - Control Theory and Applications
Volume 149, Issue 6, November 2002
Volumes & issues:
Volume 149, Issue 6
November 2002
-
- Author(s): C.H. Ting ; R.H. Arnott ; D.A. Linkens ; A. Angel ; M. Mahfouf
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 481 –493
- DOI: 10.1049/ip-cta:20020733
- Type: Article
- + Show details - Hide details
-
p.
481
–493
(13)
Changes in onset latency and relative amplitudes of somatosensory evoked potentials (SEP) have been demonstrated to be a reliable neurophysiological indicator of anaesthetic effects. Previous studies have indicated that it is feasible to use SEPs for automatic drug delivery control in propofol anaesthesia on rats premedicated with urethane. This study provides further insight into how well the control performance can be improved using the generalised predictive control (GPC) algorithm. A multi-mode controller was developed with proportional-integral (PI) control for inducing GPC learning at the beginning of drug administration, and GPC for subsequent control. Manual adjustment of salient control tuning factors allowed for operator intervention in real-time. Various GPC tuning factors were validated in trials with six rats. Each experiment began with 50 min of baseline control, then a long period of drug delivery control, and termination after a complete recovery to the baseline. Experimental results show that the GPC system provided a superior performance to the previous PI system in terms of steady-state error, and output oscillation. - Author(s): W. Zhang ; D. Gu ; X. Xu
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 494 –496
- DOI: 10.1049/ip-cta:20020798
- Type: Article
- + Show details - Hide details
-
p.
494
–496
(3)
Dual parameterisation has recently been presented for the class of all stabilising controllers for linear minimum phase rational plants. It is shown that the result can be extended to the parameterisation of all stabilising controllers for linear nonminimum phase rational plants. The parameterisation for nominal plants is a special case of the new parameterisation. Numerical examples are provided to illustrate the new parameterisation. - Author(s): B. Bandyopadhyay and C.M. Saaj
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 497 –503
- DOI: 10.1049/ip-cta:20020703
- Type: Article
- + Show details - Hide details
-
p.
497
–503
(7)
A robust fast output sampling sliding mode control (FOSSMC) method for discrete-time systems with uncertainty is presented. Recently a FOSSMC was designed for a constant discrete-time system, however, this control law does not ensure the robustness of the system to parameter uncertainty and external disturbances. The authors present a FOSSMC that for known parameter variations and external disturbances does guarantee the robustness of the sliding mode motion. - Author(s): O. Bachelier ; D. Peaucelle ; D. Arzelier
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 505 –510
- DOI: 10.1049/ip-cta:20020729
- Type: Article
- + Show details - Hide details
-
p.
505
–510
(6)
The problem of robust matrix root-clustering against additive structured uncertainty is addressed. A bound on the size of the uncertainty domain preserving matrix D-stability is derived from an LMI approach. A recently proposed sufficient condition for robust matrix D-stability with respect to convex polytopic uncertainty is used. It is relevant to the framework dealing with parameter-dependent Lyapunov functions. Using this condition, the problem of computing the robustness bound is formulated as a generalised eigenvalue problem, that enables the bound value to be maximised. - Author(s): L.F. Yeung ; W.K. Yang ; W.H.Y. Ng ; G.F. Bryant
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 511 –519
- DOI: 10.1049/ip-cta:20020341
- Type: Article
- + Show details - Hide details
-
p.
511
–519
(9)
A sequential design method based on Gauss–Jordan operation is developed for MIMO systems with parametric uncertainties. The coefficients of the system transfer functions are assumed to be affine functions within a parametric space. A sequential transformation is used to decompose a MIMO system into a series of multi-input single-output systems, and hence a synthesis-oriented Nyquist type design procedure can be developed. - Author(s): M.-S. Chen and Y.-Z. Chen
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 520 –524
- DOI: 10.1049/ip-cta:20020675
- Type: Article
- + Show details - Hide details
-
p.
520
–524
(5)
Normalised quadratic control, a modification of the conventional quadratic control method, has recently been proposed to exponentially stabilise a homogeneous bilinear system whose open-loop eigenvalues all fall on the imaginary axis. The normalised quadratic control method is now extended to a broader class of bilinear systems whose open-loop eigenvalues may fall to the left or right of the imaginary axis. It is shown that for bilinear systems that are already open-loop stable, the normalised quadratic control can add to the system an extra exponential decay rate. For open-loop unstable bilinear systems, the normalised quadratic control can stabilise the system if the extra exponential decay rate provided by the control is larger than the open-loop system's growth rate. - Author(s): L.-S. Wang ; Y.-T. Chiang ; F.-R. Chang
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 525 –531
- DOI: 10.1049/ip-cta:20020799
- Type: Article
- + Show details - Hide details
-
p.
525
–531
(7)
A constrained filtering method is proposed to deal with the filtering problems for nonlinear systems with constraints. The problem is converted to a sequence of recursive estimation problems in which the system equations and constraint conditions are treated as pseudo-measurements. To resolve the singularity problem arising from the constraints, a modified maximum-likelihood method for nonlinear systems is developed. The simulation results from the application of the proposed scheme to the target tracking problem shows that the constrained filtering method can enhance the performance of filter design significantly. - Author(s): Ding Z.
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 533 –539
- DOI: 10.1049/ip-cta:20020732
- Type: Article
- + Show details - Hide details
-
p.
533
–539
(7)
The complete adaptive compensation of unknown disturbances for uncertain nonlinear output feedback systems is studied. The unknown disturbances are generated from an unknown linear exosystem whose order is assumed known and the eigenvalues are distinct. The uncertainty of the system is characterised by unknown constant parameters contained in a vector. The uncertainties in the nonlinear system and the uncertainties in the exosystem are tackled concurrently. The proposed control design is able to completely adaptively compensate for the disturbances without knowing their amplitudes, frequencies and phases, as long as the number of different frequency components in the disturbances is known. A new control strategy, different from the current ones for output regulation with adaptive internal models, is proposed, which results in the direct estimation of all original unknown parameters in the system and the removal of the restriction imposed by the current methods that all the nonlinear functions must be polynomials of the system output. The completely new design of additional filters makes it possible to adaptively tackle the concurrent uncertainties in the system and the exosystem. - Author(s): É. Gyurkovics
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 540 –546
- DOI: 10.1049/ip-cta:20020676
- Type: Article
- + Show details - Hide details
-
p.
540
–546
(7)
The H∞ control problem for discrete-time nonlinear systems with bounded controllers is considered. Applying the receding horizon method for a game problem, a state feedback control law is proposed which imposes a prescribed level of disturbance attenuation with internal stability in a larger domain of the state space than by other methods existing in the literature. Under some further conditions a global solution for the problem is also given. The proposed method cannot only be applied to cases amenable to solution by other methods but also to cases for which the linearisation technique does not work. The application of the method is illustrated by an example. - Author(s): C. Hwang and F.-P. Chang
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 547 –553
- DOI: 10.1049/ip-cta:20020728
- Type: Article
- + Show details - Hide details
-
p.
547
–553
(7)
A general analytic method for the evaluation of generalised quadratic integrals of the form Jμ,ν(σ)=∫0∞tμexp (σt)(dνe(t)/dtν)2dt, where μ and ν are integers and e(t) is the error variable of a control system having multiple commensurate time delays is presented. More precisely, the authors derive an analytic solution to the problem of evaluating Jμ,ν(σ) from the equivalent frequency-domain complex integral. The method is based on using a mathematically rigorous procedure to perform partial fraction decompositions of the integrand of the complex integral. It involves solving sets of symbolic linear equations and the factorisation of 1-D polynomials. The results presented for the evaluation of complex integrals involving the delay operator e−τs are of direct interest to the parametric optimisation and balanced realisation and reduction of linear time-delay systems. - Author(s): R.-J. Wai ; C.-M. Lin ; C.-F. Hsu
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 555 –563
- DOI: 10.1049/ip-cta:20020730
- Type: Article
- + Show details - Hide details
-
p.
555
–563
(9)
The position control of an induction servomotor drive using a hybrid control system is studied. The design of a hybrid control system contains three parts: (i) the design of a computed torque controller that compensates for nonlinear effects and attempts to cancel nonlinear terms; (ii) the design of an adaptive fuzzy sliding-mode uncertainty observer to estimate all uncertainties that exist in the controlled system; and (iii) the design of a robust controller to dispel the effect of the minimum approximation error introduced by the uncertainty observer. All parameters in the hybrid control system are tuned in the sense of the Lyapunov theorem, thus the stability of the closed-loop system can be guaranteed. Simulated and experimental results verify that the proposed hybrid control scheme can achieve a favourable tracking performance and is robust with regard to parameter variations and external load disturbances. In addition, the advantages of the proposed hybrid control system are indicated in comparison with the traditional computed torque and sliding-mode control systems. - Author(s): H. Takami
- Source: IEE Proceedings - Control Theory and Applications, Volume 149, Issue 6, p. 564 –572
- DOI: 10.1049/ip-cta:20020643
- Type: Article
- + Show details - Hide details
-
p.
564
–572
(9)
The design of an optimal current controller for a permanent magnet synchronous motor is presented. Robust and simple current controllers that do not require the use of an added lagging compensator, are designed using the inverse linear quadratic (ILQ) design method. The ILQ design method is a strategy to find the optimal gains that is based on pole assignment without having to solve Riccati's equation. The basic ILQ technique is improved by the addition of an analytical equation that guarantees the optimality of the solutions. The optimum gains that minimise the settling time for step responses of the motor currents with no overshoot are obtained. The proposed procedure can be applied to any system with a single input and a single output and extends the conventional ILQ design method allowing its use in new areas.
Generalised predictive control of evoked potentials for general anaesthesia
Dual parameterisation for linear nonminimum phase plants
Algorithm on robust sliding mode control for discrete-time system using fast output sampling feedback
Computing a robust D-stability bound using a parameter-dependent Lyapunov approach
Sequential design method for MIMO systems with parametric uncertainties
Normalised quadratic controls for a class of bilinear systems
Filtering method for nonlinear systems with constraints
Adaptive tracking with complete compensation of unknown disturbances for nonlinear output feedback systems
Receding horizon H∞ control for nonlinear discrete-time systems
Evaluation of generalised quadratic cost functionals for linear systems with many commensurate time delays
Hybrid control for induction servomotor drive
Design of an optimal servo-controller for current control in a permanent magnet synchronous motor
Most viewed content for this Journal
Article
content/journals/ip-cta
Journal
5
Most cited content for this Journal
We currently have no most cited data available for this content.