Analysis of complex systems such as hierarchically structured network systems that are employed in modelling and analysis various aspects and issues of control and management in telecommunications is investigated. The...
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This paper proposes a circuit configuration for the realization of a four-terminal floating nullor (FTFN) with electronically tunable current gain. It mainly consists of an op amp in input together with two complement...
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This paper proposes a circuit configuration for the realization of a four-terminal floating nullor (FTFN) with electronically tunable current gain. It mainly consists of an op amp in input together with two complementary current mirrors with controlled gain and two standard improved Wilson (1990) current mirrors. The validity of the performance of the scheme is verified through PSPICE simulation results. Some example applications in the design of the proposed tunable FTFN as a tunable active element show that the circuit properties can he varied by electronic means are also included.
The article concerns with AC induction motor closed loop direct vector control design. It includes design and program realisation of PI controllers for currents, flux, torque and speed. The system consists of two-pole...
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The article concerns with AC induction motor closed loop direct vector control design. It includes design and program realisation of PI controllers for currents, flux, torque and speed. The system consists of two-pole 1.1 kW motor, IGBT inverter. DSP processor ADSP2101 on ADSP2101 EZ-LAB board and coprocessor ADMC201 on ADMC200-EVAL board. The switching frequency of the inverter is 3 kHz. The both the rotor position for the vector Park-Clark transformations and the rotor speed for the speed control are obtained from an optical encoder of 1024 pulses per evolve.
Fuzzy control belongs towards recently often-used control algorithms. The fuzzy controller can work like a classical feedback controller or like a superior control system that can choose some control algorithm in depe...
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Fuzzy control belongs towards recently often-used control algorithms. The fuzzy controller can work like a classical feedback controller or like a superior control system that can choose some control algorithm in dependence on the working point of the controlled system. The combination of these two possibilities was chosen in our case because our main aim was design of the fuzzy controller for an inverted pendulum. This paper describes the fuzzy control foundations, control structure tuning with a Takagi-Sugeno fuzzy controller and a case study - an inverted pendulum control.
Present trends in education are dominated by the shift from the traditional teacher-centred to the learner-centred approaches. Needs of new target groups, together with the development of the multimedia and ICT lead t...
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Present trends in education are dominated by the shift from the traditional teacher-centred to the learner-centred approaches. Needs of new target groups, together with the development of the multimedia and ICT lead to radical changes in the learning environment and to necessity of the new learning organization. This paper is reporting about experience in developing such a new environment at the department of automation and control, FEI STU in Bratislava, in cooperation with the Local Centre of Distance Education.
The paper deals with the parameter identification of Wiener systems having two-segment polynomial nonlinearities. Application of a simple decomposition technique provides a special form of Wiener model that is linear-...
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The paper deals with the parameter identification of Wiener systems having two-segment polynomial nonlinearities. Application of a simple decomposition technique provides a special form of Wiener model that is linear-in-parameters. This allows simultaneous estimation of all the model parameters. To demonstrate the feasibility of the identification method, more illustrative examples are included and analyzed.
The contribution is oriented to the area of automatic control of the amorph bands reeling. The bands are produced by the technology of fast cooling. The process of bands production runs at velocities approx. 30 m/s. I...
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The contribution is oriented to the area of automatic control of the amorph bands reeling. The bands are produced by the technology of fast cooling. The process of bands production runs at velocities approx. 30 m/s. In the article there is presented the original method to capture the band beginning into the special reeling device that is automatically controlled. This method is patented by the author. The problem is in extremely difficult control of the abducting forces in the variable structure system with variable parameters.
This paper reports about experience in building control Laboratory and in organising the learning process with the aim to foster an active and creative learning by doing.
This paper reports about experience in building control Laboratory and in organising the learning process with the aim to foster an active and creative learning by doing.
This paper presents an attractive artificial neural network architecture with orthonormal type of activation functions (e.g. harmonic, Legendre, Laguerre and Chebychev) for modeling and self-tuning control of nonlinea...
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This paper presents an attractive artificial neural network architecture with orthonormal type of activation functions (e.g. harmonic, Legendre, Laguerre and Chebychev) for modeling and self-tuning control of nonlinear processes. An algorithm for modeling and self-tuning control of uncertain nonlinear complex processes is proposed. Several types of orthonormal functions for nonlinear process modeling and control are analyzed and compared. Simulation results are provided to illustrate high performance of artificial neural networks with the orthonormal activation functions in practical industrial problems. The obtained results are compared and potential shortcomings of the proposed methods for real time industry control are discussed and analyzed.
This paper presents a novel methodology for modeling and control of nonlinear processes using artificial neural network with orthonormal activation functions (e.g. harmonic, Legendre, Laguerre and Chebychev). An algor...
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This paper presents a novel methodology for modeling and control of nonlinear processes using artificial neural network with orthonormal activation functions (e.g. harmonic, Legendre, Laguerre and Chebychev). An algorithm for modeling and self-tuning control of uncertain nonlinear complex processes is proposed. Several types of orthonormal functions for nonlinear process modeling and control are analyzed and compared. Simulation results are provided to illustrate high perfonnance of artificial neural networks with the orthonormal activation functions in practical industrial problems. The obtained results are reviewed and potential shortcomings of the analyzed methods are discussed.
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