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Based on Lyapunov equation and ∞-norm of matrices, sufficient conditions for Hurwitz and Schur stability of interval matrix polynomials are yielded. Since the parameter space of interval matrix polynomials with N order and K×K dimension is of 2NK2 dimension at most, it is difficult to determine its Hurwitz and Schur stability by finite algorithms. We simplify the stability test problem by relating...
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
Variable Structure Control(VSC) with sliding mode is a special type of control technique that is capable of making a control system very robust with respect to system parameter variations and external disturbances. The chattering of the VSC signal can be reduced by several methods. One way is to augment the system with an integrator to isolate the system from the VSC control signal which causes the...
A boiler simulator of a combined cycle power plant based on phenomenological equations, developed in Matlab-SIMULINK, is presented. Then, a new economical optimal control strategy based on minimising the operational costs of a boiler is designed and implemented. The solution is given by the optimal set points of the regulation level, i.e., the set points of the PI controllers. The optimisation problem...
This article introduces an analytical model of thermal rapid prototyping processes, using superposition of unit deposition distributions, composed of elementary ellipsoidal primitives. The real-time surface geometry model, with its parameters identified by in-process profile measurements, is used for Smith-prediction of the material shape. Thus, a distributed-parameter geometry control scheme is established...
The paper deals with the design of an integral variable structure systems that enable to achieve the asymptotic reference signal tracking and unmeasured disturbances rejection in MIMO plants. The sliding mode equivalence principle and inverse model control method are used to determine the required dynamic switching surfaces with integral parts ensuring disturbances estimation and compensative control...
Air terminals are an important component of most variable air volume air conditioning systems. Most air terminal controllers share the same continuous closed feedback loop control of the room loop whether the controller is pneumatic, analog electronic or digital electronic or other. Unfortunately, the controllers also share the same inability to provide good hybrid control. The use of split range...
This paper studies the problem of Η∞ detection filter design for state delayed linear continuous-time systems with parameter uncertainty, in which the effects of faults and disturbances cannot be de-coupled from each other. The detection filter gains are designed so that, if the fault of the system is absent, the filter is convergent for the admissible uncertainty conditions. The transfer function...
A differential game approach is used in this paper to derive all guaranteed cost linear state feedback controllers for linear uncertain systems in which a norm bounded uncertainty enters both the state and the input matrices. Generalizing previous results, we do not assume the uncertainties to be ‘matched’, in other words they may enter the system dynamics through different matrices. The guaranteed...
This paper presents a novel technique in which fuzzy and evolutionary techniques are fused for the design of a class of optimum neural controllers. In the proposed technique the attributes of the performance of the closed system, i.e. overshoot, rise time and settling time in response to a step demand are related to the suitability of the controller through fuzzy linguistic rules. De-fuzzification...
The paper presents a synthesis of some author's activity. A speed control system for dc drives, based upon a PI fuzzy controller with integration at the output, with a simple rule base with only 9 rules is developed, analyzed and simulated. The sum-prod inference method is used with the center of gravity defuzzification. The performance criteria of the fuzzy control system are compared with the performance...
The paper presents a systematical development method for four fuzzy controllers with non-homogenous dynamics with respect to the two input channels; the proposed controller structures are meant for a class of second order and third order plants, which is specific to the field of electrical drives. The electrical drives are characterized by standard models for which even the classical (linear) control...
Fuzzy gain scheduling of proportional-integral (PI) controller are proposed for the area load-frequency control problem. Comparison study of conventional PI controller with proposed controller show that proposed controller can yield the best dynamic responses following a step load change.
Recently artificial neural networks have been advocated as a possible technique for fault detection. Neural networks are noise tolerant and their ability to generalise the knowledge as well as to adapt during use are extremely interesting properties. The approach to solution of properties changes detection problem for stochastic sequences circumscribed by the nonlinear equations of an autoregressive-moving...
Several classes of non-singular functional transformations for linear stationary dynamical systems with retarded argument are introduced. Then, the problem of determination of canonical forms is interpreted as the algebraic problem of universality for each class of transformations. Generalization of Kalman, Popov and Brunovsky canonical representations are given for systems of control and observation...
This paper discusses the question of saturating actuators in a multi-input multi-output (MIMO) control system design. It is shown that direct application of standard anti-windup schemes can lead to loss of closed-loop stability, as well as, the degradation of the directional properties of the system. Consequently, a novel anti-windup scheme is proposed, where the intended procedure ensures stability,...
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