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Wyszukujesz frazę "fractional optimization" wg kryterium: Temat

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    Tytuł:
    Necessary optimality conditions for a set valued fractional programming problem in terms of contingent epiderivatives
    Autorzy:
    Gadhi, A. N.
    Idrissi, M. El.
    Powiązania:
    https://bibliotekanauki.pl/articles/205692.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    fractional optimization
    multi-objective optimization
    cone-convex mapping
    optimality conditions
    subdifferential
    Opis:
    In this paper, we are concerned with a multi-objective fractional extremal programming problem. Using the concept of subdifferential of cone-convex set valued mappings, introduced by Baier and Jahn (1999), together with the convex separation principle, we give necessary optimality conditions. An example illustrating the usefulness of our results is also provided.
    Źródło:
    Control and Cybernetics; 2018, 47, 2; 147-156
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of simulated annealing method for optimization of fractional order PID controller
    Autorzy:
    Mikulski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/97234.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    fractional order controller
    optimization
    fractional calculus
    simulated annealing
    Opis:
    The paper describes method of parameters selection for control system with fractional order PIλDμ controller steering second order oscillated object. As a selection algorithm was used simulated annealing optimization method with random variant of cooling strategy. As a target function for optimization was selected Integral Squared Error (ISE).
    Źródło:
    Computer Applications in Electrical Engineering; 2015, 13; 178-187
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimized fractional low and highpass filters of (1 + α) order on FPAA
    Autorzy:
    Singh, N.
    Mehta, U.
    Kothari, K.
    Cirrincione, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/200342.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractional-order filter
    FPAA
    realization
    robustness
    bilevel optimization
    Opis:
    This work proposes an optimum design and implementation of fractional-order Butterworth filter of order (1 + α), with the help of analog reconfigurable field-programmable analog array (FPAA). The designed filter coefficients are obtained after dual constraint optimization to balance the tradeoffs between magnitude error and stability margin together. The resulting filter ensures better robustness with less sensitivity to parameter variation and minimum least square error (LSE) in magnitude responses, passband and stopband errors as well as a better –3 dB normalized frequency approximation at 1 rad/s and a stability margin. Finally, experimental results have shown both lowpass and highpass fractional step values. The FPAA-configured outputs represent the possibility to implement the real-time fractional filter behavior with close approximation to the theoretical design.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 635-644
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On LQ optimization problem subject to fractional order irregular singular systems
    Autorzy:
    Muhafzan, -
    Nazra, Admi
    Yulianti, Lyra
    Zulakmal, -
    Revina, Refi
    Powiązania:
    https://bibliotekanauki.pl/articles/1409212.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    linear quadratic optimization
    fractional order
    irregular singular system
    Caputo fractional derivative
    Mittag-Leffler function
    Opis:
    In this paper we discuss the linear quadratic (LQ) optimization problem subject to fractional order irregular singular systems. The aim of this paper is to find the control-state pairs satisfying the dynamic constraint of the form a fractional order irregular singular systems such that the LQ objective functional is minimized. The method of solving is to convert such LQ optimization into the standard fractional LQ optimization problem. Under some particularly conditions we find the solution of the problem under consideration.
    Źródło:
    Archives of Control Sciences; 2020, 30, 4; 745-756
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Property identification of viscoelastic solid materials in nomograms using optimization techniques
    Autorzy:
    de Sousa, T. L.
    Kanke, F.
    Pereira, J. T.
    Bavastri, C. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/280283.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    identification
    optimization
    viscoelastic materials
    Zener fractional model
    Wiechert model
    Opis:
    Viscoelastic materials have been widely used as devices for vibration control in general. Frequently, dynamic properties of those materials are provided by manufacturers only in a graph form in the frequency domain. This is a recurring problem in industry and academia. Thereby, the goal of this work is to contribute to this important issue which is to obtain the properties of viscoelastic materials from nomograms supplied by the manufacturer. The methodology is based on the digitalization of the nomogram of the material and on the subsequent reading of a set of points from two curves in different temperatures. An optimization problem with simple restrictions is built having characteristic constants of the constitutive models as design variables. The problem is solved by applying a hybrid optimization technique. The results obtained are presented, and prove to be very promising.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1285-1297
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review, design, stabilization and synchronization of fractional-order energy resources demand-supply hyperchaotic systems using fractional-order PD-based feedback control scheme
    Autorzy:
    Soukkou, Ammar
    Soukkou, Yassine
    Haddad, Sofiane
    Benghanem, Mohamed
    Rabhi, Abdelhamid
    Powiązania:
    https://bibliotekanauki.pl/articles/27322620.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    fractional-order systems
    fractional-order control
    Lyapunov stability theory
    multiobjective optimization
    artificial hummingbird algorithm
    stabilization
    synchronization
    energy resources demand-dupply systems
    Opis:
    This paper introduces a fractional-order PD approach (F-oPD) designed to control a large class of dynamical systems known as fractional-order chaotic systems (F-oCSs). The design process involves formulating an optimization problem to determine the parameters of the developed controller while satisfying the desired performance criteria. The stability of the control loop is initially assessed using the Lyapunov’s direct method and the latest stability assumptions for fractional-order systems. Additionally, an optimization algorithm inspired by the flight skills and foraging behavior of hummingbirds, known as the Artificial Hummingbird Algorithm (AHA), is employed as a tool for optimization. To evaluate the effectiveness of the proposed design approach, the fractional-order energy resources demand-supply (Fo-ERDS) hyperchaotic system is utilized as an illustrative example.
    Źródło:
    Archives of Control Sciences; 2023, 33, 3; 539--563
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractional order PIλDμ controller with optimal parameters using Modified Grey Wolf Optimizer for AVR system
    Autorzy:
    Verma, Santosh Kumar
    Devarapalli, Ramesh
    Powiązania:
    https://bibliotekanauki.pl/articles/2134890.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    integer order PID controller
    fractional order PID controller
    automatic voltage regulator
    evolutionary optimization
    Grey Wolf Optimizer
    Opis:
    In this paper, an automatic voltage regulator (AVR) embedded with fractional order PID (FOPID) is employed for the alternator terminal voltage control. A novel meta-heuristic technique, a modified version of grey wolf optimizer (mGWO) is proposed to design and optimize the FOPID AVR system. The parameters of FOPID, namely, proportional gain (ΚP), the integral gain ( ΚI), the derivative gain ( ΚD), λ and μ have been optimally tuned with the proposed mGWO technique using a novel fitness function. The initial values of the ΚP, ΚI , and ΚD of the FOPID controller are obtained using Ziegler-Nichols (ZN) method, whereas the initial values of λ and μ have been chosen as arbitrary values. The proposed algorithm offers more benefits such as easy implementation, fast convergence characteristics, and excellent computational ability for the optimization of functions with more than three variables. Additionally, the hasty tuning of FOPID controller parameters gives a high-quality result, and the proposed controller also improves the robustness of the system during uncertainties in the parameters. The quality of the simulated result of the proposed controller has been validatedby other state-of-the-art techniques in the literature.
    Źródło:
    Archives of Control Sciences; 2022, 32, 2; 429--450
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tuning and digital implementation of a fractional-order PD controller for a position servo
    Autorzy:
    Tepljakov, A.
    Petlenkov, E.
    Belikov, J.
    Astapov, S
    Powiązania:
    https://bibliotekanauki.pl/articles/397895.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    fractional calculus
    position servo
    PID controller
    digital control
    control optimization
    rachunek ułamkowy
    pozycja serwo
    regulator PID
    sterowanie cyfrowe
    optymalizacja sterowania
    Opis:
    Fractional-order calculus offers flexible computational possibilities that can be applied to control design thereby improving industrial control loop performance. However, before theoretical results can be carried over to an industrial setting it is important to study the effects of fractional-order control by means of laboratory experiments. In this paper, we study the practical aspects of tuning and implementing a fractional-order PD controller for position control of a laboratory modular servo system using FOMCON (“Fractional-order Modeling and Control”) toolbox for MATLAB. We provide an overview of the tools used to model, analyze, and design the control system. The procedure of tuning and implementation of a suitable digital fractional-order controller is described. The results of the real-time experiments confirm the effectiveness of used methods.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2013, 4, 3; 116-123
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection and localization of delaminations in composite beams using fractional B-spline wavelets with optimized parameters
    Detekcja i lokalizacja rozwarstwień w kompozytowych belkach z wykorzystaniem B-splajnowych falek ułamkowych z optymalizowanymi parametrami
    Autorzy:
    Katunin, A.
    Przystałka, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1366017.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    detection and localization delaminations
    layered composites
    fractional B-spline wavelets
    optimization
    detekcja i lokalizacja rozwarstwień
    kompozyty warstwowe
    ułamkowe falki B-splajnowe
    optymalizacja
    Opis:
    In this paper the method of detection and localization of delaminations in composite layered beams using an algorithm based on the wavelet transform of bending modal shapes of beams was presented. For the basis functions the fractional B-spline wavelets with single- and multi-objective optimization of the values of their parameters were selected. The analysis was carried out basing on the results of numerical simulations. Several cases of the delaminations occurrence with respect to their location on the thickness of the beams, different sizes and geometrical features, were analyzed. Results of the conducted analyzes show the high effectiveness of a method in the task of detection of delaminations and a possibility of its application in industrial conditions.
    W pracy przedstawiono metodę detekcji i lokalizacji rozwarstwień w kompozytowych belkach warstwowych z wykorzystaniem algorytmu opartego na transformacji falkowej giętnych postaci własnych drgań belek. Jako funkcje bazowe zastosowano ułamkowe falki B-splajnowe z jedno- i wielokryterialną optymalizacją wartości ich parametrów. Analizę przeprowadzono na wynikach obliczeń numerycznych. Przeanalizowano przypadki występowania rozwarstwień w różnej lokalizacji na grubości płyt oraz przypadki z rozwarstwieniami o różnych rozmiarach i postaciach geometrycznych. Wyniki przeprowadzonych analiz wykazały wysoką skuteczność metody w wykrywaniu rozwarstwień i możliwość jej zastosowania w warunkach przemysłowych.
    Źródło:
    Eksploatacja i Niezawodność; 2014, 16, 3; 391-399
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractional order based computed torque control of 2-link robotic arm
    Autorzy:
    Anwaar, Haris
    Yixin, Yin
    Ijaz, Salman
    Ashraf, Muhammad Ammar
    Anwaar, Waqas
    Powiązania:
    https://bibliotekanauki.pl/articles/103321.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    fractional order PID controller
    computed torque controller
    2-link robotic arm
    Nelder-Mead optimization
    regulator PID
    regulator momentu obrotowego
    2-linkowe ramię robota
    optymalizacja Neldera-Meada
    Opis:
    The paper proposes the application of fractional order controller in position tracking control of 2-link nonlinear robotic arm. The nonlinear system dynamics is linearized using inverse dynamics of the model and fractional order PID controller is designed to deal with remaining tracking errors. The optimal values of controller pa-rameters are calculated using Nelder-Mead optimization technique based on desired design criteria. The objective function is designed using weighted sum approach on each performance specification based on transient domain parameters. It can be seen from simulation results that fractional order controller together with computed torque controller improved tracking performance of proposed system as compared to PID controller used in the outer loop. Moreover, the robustness of proposed scheme is checked by applying the disturbance signal at control input channels of 2-link nonlinear robotic arm links.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 1; 273-284
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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