This paper compares two approaches to the control design for a thermal plant. This is dominant by two modes of the heat transfer - the fast mode (radiation) and the slow mode (conduction), by the nonlinear state depen...
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Reactor furnace control design is described in this paper. Reactor furnace, as controlled plant, is significantly nonlinear system and control objectives are strict. Thus, special control technique has to be applied. ...
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Reactor furnace control design is described in this paper. Reactor furnace, as controlled plant, is significantly nonlinear system and control objectives are strict. Thus, special control technique has to be applied. In this case, discrete PID controller tuned by artificial intelligence techniques is chosen. After reactor furnace description and first principle model derivation, the control method is closely defined. Then, nonlinear neural model of the furnace is designed and control loop is connected. Lastly, control performance is shown and compared to performance derived by conventional control method.
Robust stability is an important aspect in control of real world systems, since uncertainties have to be considered in dynamic system models. The basic required quality of the system is its stability in the whole unce...
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Robust stability is an important aspect in control of real world systems, since uncertainties have to be considered in dynamic system models. The basic required quality of the system is its stability in the whole uncertainty domain called robust stability. This paper studies the robust decentralized controller design for a quadruple tank process, [3,4]. For this case study, several important aspects of system analysis are shown (pairing, stabilizability via decentralized control). The main contribution is the decentralized PID controller design in both frequency and time domains, analysis and comparison of results. The obtained results are supported by simulations used to demonstrate and compare the different approaches.
The new BMI based method for robust stabilizing PID controller design for linear uncertain system is proposed. The general constrained structure of controller matrix is considered which is appropriate both for output ...
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The new BMI based method for robust stabilizing PID controller design for linear uncertain system is proposed. The general constrained structure of controller matrix is considered which is appropriate both for output feedback and decentralized control. The developed control design scheme aims at robust stabilization with guaranteed cost. The extended quadratic performance index is used including the first derivative of the state vector to damp oscillations. The obtained results use parameter-dependent Lyapunov function to reduce conservatism of robust stability conditions.
The paper presents a new systematic analysis method in order to estimate the total absorbed power and energy in linear electric and magnetic circuits with modifiable parameters. The relation between the variation in o...
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The paper presents a new systematic analysis method in order to estimate the total absorbed power and energy in linear electric and magnetic circuits with modifiable parameters. The relation between the variation in one or all the resistances and reluctances of the networks and the variation of total absorbed power and energy are discussed using the Lagrange's method. For the considered applications the results are obtained with Mathematica and Maple useful for establishing the variation limits of absorbed power and energy.
Prognostic is nowadays recognized as a key feature in maintenance strategies as it should allow avoiding inopportune maintenance spending. Real prognostic systems are however scarce in industry. That can be explained ...
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It is well known, that the electrical energy storage in the large scale is basically difficult process. Such a process is marked by the energy losses, as the conversion of electrical energy into another form is most f...
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ISBN:
(纸本)9781439817841
It is well known, that the electrical energy storage in the large scale is basically difficult process. Such a process is marked by the energy losses, as the conversion of electrical energy into another form is most frequently. Though, the superconducting magnetic energy storage (SMES) technology offers the energy storage in an unchanged form, which is advantageous primarily in the achieved efficiency. The magnetic resonance imaging (MRI) devices, commonly used in the medical facilities, there is possibility of using such ecological devices for energy storage purposes, after its rejection from operation. The paper gives a short review of current UPS and energy storage technologies, SMES applications and short section about a research project running at the faculty of Mining, Ecology, Process control and Geotechnologies at Technical University in Kǒice, Slovakia, which deals with using rejected MRI for electrical energy storage and backup power supply purposes.
The paper presents two calculus algorithms for the study of the compressible fluid's stationary movement through profile grids on an axial-symmetric flow-surface. The first method is based on an iterative formula ...
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The paper presents two calculus algorithms for the study of the compressible fluid's stationary movement through profile grids on an axial-symmetric flow-surface. The first method is based on an iterative formula developed by the authors to calculate the complex conjugate velocity (using the CVBEM algorithm). The second method solves the fundamental integral equation in real values by a priori building up the velocity potential's integral equation (BEM method). In this case it is presented the necessity of using the Lagrangian interpolation formula through five points for the calculation of the derivatives of the velocity potential. In both cases the consecutive approximations can be organized simultaneously or successive with respect to parameters ς (fluid's density) and h (thickness variation of fluid stratum).
The paper reviews the research results in the field of automaticcontrol of Type I diabetes mellitus obtained by the Biomedical engineering laboratory of the controlengineering and Inforamtion Technology Department, ...
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The paper reviews the research results in the field of automaticcontrol of Type I diabetes mellitus obtained by the Biomedical engineering laboratory of the controlengineering and Inforamtion Technology Department, Budapest University of Technology and Economics (BME) in the last years. Beside the past, the present and the future ideas are also numbered.
An analysis of the effect of parasitics and reverse recovery on harmonic distortion in a class D audio amplifier is performed in this paper. The error sources under investigation are modelled empirically as an amplitu...
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An analysis of the effect of parasitics and reverse recovery on harmonic distortion in a class D audio amplifier is performed in this paper. The error sources under investigation are modelled empirically as an amplitude error, after which an existing strategy based on Newton's numerical method is implemented to simulate its effect within the audible band. The results are compared to existing timing errors to determine its degree of dominance.
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