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Wyszukujesz frazę "fuzzy modelling" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Bitmap based structures for the modeling of fuzzy entities
Autorzy:
Verstraete, J.
Tre, G. de
Hallez, A.
Powiązania:
https://bibliotekanauki.pl/articles/970481.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
imprecise GIS
uncertain GIS
fuzzy data modelling
fuzzy bitmaps
Opis:
Bitmap models are a known technique to model field based geographic information. Commonly, geographic information is modelled in a crisp sense, even though in reality it most likely is an approximation. In this article, we present the use of bitmap based structures to model imprecise or uncertain locations and ditto regions: these structures should be considered to be extensions of respectively a point and a polygon. The imprecission or uncertainty is modelled using fuzzy set theory. Apart from presenting the structures, appropriate operators are denned and explained.
Źródło:
Control and Cybernetics; 2006, 35, 1; 147-164
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Takagi-Sugeno fuzzy control scheme for electrohydraulic active suspensions
Autorzy:
Du, H.
Zhang, N.
Powiązania:
https://bibliotekanauki.pl/articles/970221.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
vehicle active suspension
electrohydraulic actuator dynamics
Takagi-Sugeno fuzzy modelling
actuator saturation
Opis:
The paper presents a new control strategy for active vehicle suspensions using electrohydraulic actuators based on Takagi-Sugeno (T-S) fuzzy modelling technique. As the electrohydraulic actuator dynamics is highly nonlinear, the T-S fuzzy modelling technique using the idea of "sector nonlinearity" is applied to exactly represent the nonlinear dynamics of electrohydraulic actuator in a denned region at first. Then, by means of parallel distributed compensation (PDC) scheme and Lyapunov method, a fuzzy HOO controller is designed for the T-S fuzzy model to optimise the suspension ride comfort performance, considering actuator input voltage saturation problem. The sufficient conditions for the existence of such a controller are derived in terms of linear matrix inequalities (LMIs). The advantage of this new control strategy for electro-hydraulic active suspensions is that it directly aims at optimising suspension performance with guaranteeing the closed-loop system stability. Thus, two-loop control strategy, where the inner loop is used to make the electrohydraulic actuator tracking a desired force (pressure, or displacement, etc.), is not necessary. In addition, the controller is simple in structure compared to the adaptive control algorithms. A numerical example is used to validate the effectiveness of the proposed approach. It is confirmed by the simulations that the designed controller can achieve better performance than the active suspension with optimal skyhook damper.
Źródło:
Control and Cybernetics; 2010, 39, 4; 1095-1115
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy modelling of temperature difference in 200 MW power unit condenser using genetic fuzzy systems
Autorzy:
Pająk, M.
Powiązania:
https://bibliotekanauki.pl/articles/970605.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
learning
fuzzy models
genetic algorithms
fuzzy statistics and data analysis
large-scale systems
linguistic modelling
Opis:
Energy generation is one of the most complicated industrial processes. Because of its complexity, there is no accurate conventional model of a power unit. Fuzzy logic concepts might be effectively implemented in this field. In the paper a universal method of creating a fuzzy logic model is presented. To check the usefulness of the method in the case of real industrial issues, a fuzzy model of temperature difference in a condenser was automatically generated. The modelling experiment and the assessment of model quality are presented in the paper.
Źródło:
Control and Cybernetics; 2008, 37, 3; 565-583
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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