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# IEE Proceedings - Control Theory and Applications

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Displaying Results 1 - 10 of 10
• ### pH control: handling nonlinearity and deadtime with fuzzy relational model-based control

Publication Year: 1997, Page(s):263 - 268
Cited by:  Papers (3)
| | PDF (616 KB)

The application of fuzzy logic to the design of nonlinear controllers has become increasingly popular in recent years. Most of the developments have been in controllers of the rule-based type. An alternative approach, and one which reflects trends in conventional control, is to use fuzzy logic to build a process model, and then to incorporate this into a standard model-based controller scheme. The... View full abstract»

• ### Use of learning automata in distributed fuzzy logic processor training

Publication Year: 1997, Page(s):255 - 262
Cited by:  Papers (4)
| | PDF (736 KB)

A new algorithm for training the parameters of a distributed logic processor is suggested, based on learning automata. A fuzzy inference system is implemented on a multilayer perceptron platform. Various possibilities for assigning learning automata are discussed and two assignment strategies are proposed. The behaviour of the resulting algorithm is illustrated using flue-gas NOx emissi... View full abstract»

• ### Stable receding horizon control based on recurrent networks

Publication Year: 1997, Page(s):249 - 254
Cited by:  Papers (2)
| | PDF (580 KB)

The last decade has seen the reemergence of artificial neural networks as an alternative to traditional modelling techniques for the control of nonlinear systems. Numerous control schemes have been proposed and have been shown to work in simulations. However, very few analyses have been made of the working of these networks. The authors show that a receding horizon control strategy based on a clas... View full abstract»

• ### Frequency domain design method for uncertain systems under some unknown-but-bounded disturbances

Publication Year: 1997, Page(s):225 - 232
| | PDF (620 KB)

A frequency domain design methodology for a linear SISO uncertain system with control input and states constraints some unknown-but-bounded disturbances is developed. The maximum variation of the plant is transferred to the values of external disturbance at the plant output with a fixed nominal plant. Similarly, the control input and states constraints, expressed in the time domain with bandwidth ... View full abstract»

• ### Adaptive control scheme using real time tuning of the parameter estimator

Publication Year: 1997, Page(s):241 - 248
Cited by:  Papers (2)
| | PDF (540 KB)

The paper presents an adaptive controller for discrete-time systems, with parameters modelled as a Gauss-Markov process with an unknown noise covariance matrix. The cost function adopted in the optimisation of the control performance is the sum of the output variances up to M steps ahead in time. Optimal predictors are used to estimate the future outputs y(k+i), i=1, 2. ..., M, that are needed in ... View full abstract»

• ### Robust pole assignment in uncertain systems

Publication Year: 1997, Page(s):217 - 224
Cited by:  Papers (8)
| | PDF (848 KB)

The concept of pole colouring' is introduced as a graphical aid to the problem of observing the closed-loop system pole variations as a function of uncertainty. Some possible cost functions that can be used to measure the performance robustness of the resulting systems are also considered View full abstract»

• ### Exact determination of the limit cycles in relay control systems with additional nonlinearities in the feedback loops

Publication Year: 1997, Page(s):269 - 275
Cited by:  Papers (1)
| | PDF (464 KB)

The A-function method is extended to analyse a relay feedback control system with additional nonlinearities in the feedback loops. The situation considered is where the output of the plant and/or its successive derivatives are fed back to the input through nonlinearities that are assumed to be of polynomial type. An example is also given to show that, in some cases, the method can be used in syste... View full abstract»

• ### Autotuning temperature control using identification by multifrequency binary sequences

Publication Year: 1997, Page(s):233 - 240
Cited by:  Papers (7)
| | PDF (812 KB)

The PID control algorithm applied in the paper is still one of the most popular in many branches of industry. Modern temperature controllers should be equipped with an identification algorithm which allows the determination of the controller settings automatically with high accuracy. This approach leads to the idea of autotuning controllers, which are often based on knowledge of the frequency resp... View full abstract»

• ### Output feedback sliding mode design for linear uncertain systems

Publication Year: 1997, Page(s):209 - 216
Cited by:  Papers (34)
| | PDF (784 KB)

The paper considers the development of output feedback sliding mode controllers for a class of uncertain linear systems. The presence of stable invariant zeros and matched uncertainty is incorporated in the design procedure. The sufficient conditions for developing static output feedback sliding mode controllers are first reviewed. If Kimura-Davison' conditions are satisfied, it is shown that it ... View full abstract»

• ### Discretisation of continuous-time control systems with guaranteed stability [comment with reply]

Publication Year: 1997, Page(s):277 - 279
| | PDF (180 KB)

The commenters refer to the paper by Markazi et al. (IEE Proc. Control Theory Appl. Vol.142, No.4 (1995)) and point out that when they simulated the step response for the three digital controllers and found, using both MATLAB and Program CC, that the results were similar to those given in the paper. However, on further investigation they found that the closed loop system was not asymptotically sta... View full abstract»