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    Wyświetlanie 1-4 z 4
    Tytuł:
    Evacuation by leader-follower model with bounded confidence and predictive mechanisms
    Autorzy:
    Almeida, Ricardo
    Girejko, Ewa
    Machado, Luis
    Malinowska, Agnieszka B.
    Martins, Natália
    Powiązania:
    https://bibliotekanauki.pl/articles/1845516.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-agent systems
    emergency
    model predictive control
    bounded confidence
    Opis:
    This paper studies an evacuation problem described by a leader-follower model with bounded confidence under predictive mechanisms. We design a control strategy in such a way that agents are guided by a leader, which follows the evacuation path. The proposed evacuation algorithm is based on Model Predictive Control (MPC) that uses the current and the past information of the system to predict future agents’ behaviors. It can be observed that, with MPC method, the leader-following consensus is obtained faster in comparison to the conventional optimal control technique. The effectiveness of the developed MPC evacuation algorithm with respect to different parameters and different time domains is illustrated by numerical examples.
    Źródło:
    Archives of Control Sciences; 2021, 31, 3; 629-644
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evacuation by leader-follower model with bounded confidence and predictive mechanisms
    Autorzy:
    Almeida, Ricardo
    Girejko, Ewa
    Machado, Luis
    Malinowska, Agnieszka B.
    Martins, Natália
    Powiązania:
    https://bibliotekanauki.pl/articles/1845527.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-agent systems
    emergency
    model predictive control
    bounded confidence
    Opis:
    This paper studies an evacuation problem described by a leader-follower model with bounded confidence under predictive mechanisms. We design a control strategy in such a way that agents are guided by a leader, which follows the evacuation path. The proposed evacuation algorithm is based on Model Predictive Control (MPC) that uses the current and the past information of the system to predict future agents’ behaviors. It can be observed that, with MPC method, the leader-following consensus is obtained faster in comparison to the conventional optimal control technique. The effectiveness of the developed MPC evacuation algorithm with respect to different parameters and different time domains is illustrated by numerical examples.
    Źródło:
    Archives of Control Sciences; 2021, 31, 3; 629-644
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Loop-shaping h∞ control of an aeropendulum model
    Autorzy:
    Breganon, Ricardo
    Alves, Uiliam Nelson L. T.
    De Almeida, João Paulo L.S.
    Ribeiro, Fernando S. F.
    Mendonça, Marcio
    Palácios, Rodrigo H. C.
    Montezuma, Marcio A. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106458.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    modelowanie dynamiczne
    wahadło aerodynamiczne
    sterowanie
    dynamic system modeling
    aeropendulum
    H∞ control
    Opis:
    This work presents a mathematical model of an aeropendulum system with two sets of motors with propellers and the design and simulation of a loop-shaping h∞control for this system. In this plant, the objective is to control the angular position of the pendulum rod through the torque generated by the thrust of the motorized propellers at the end of the rod’s axis. The control design is obtained by first using feedback linearization and then designing the h∞ controller using the resulting linear system. For the control strategy validation, simulations were conducted in the Matlab/Simulink® environment, and the weighting functions for the h∞ controller were adjusted to obtain the desired performance and stability of the closed-loop system. The simulation results show the efficiency of the applied methodology.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 4; 1--16
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Observed and modelled solar radiation components in sugarcane crop grown under tropical conditions
    Autorzy:
    A. dos Santos, Marcos
    L. de Souza, José
    B. Lyra, Gustavo
    Teodoro, Iêdo
    A. Ferreira Junior, Ricardo
    C. dos Santos Almeida, Alexsandro
    B. Lyra, Guilherme
    C. de Souza, Renan
    A. Maringolo Lemes, Marco
    Powiązania:
    https://bibliotekanauki.pl/articles/972744.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    sugarcane
    albedo
    net radiation
    Opis:
    The net radiation over vegetated surfaces is one of the major input variables in many models of soil evaporation, evapotranspiration as well as leaf wetness duration. In the literature there are relatively few studies on net radiation over sugarcane crop in tropical climates. The main objective of the present study was to assess the solar radiation components measured and modelled for two crop stages of a sugarcane crop in the region of Rio Largo, Alagoas, North-eastern Brazil. The measurements of the radiation components were made with a net radiometer during the dry and rainy seasons and two models were used to estimate net radiation: the Ortega-Farias model and the Monteith and Unsworth model. The highest values of net radiation were observed at the crop development stage, due mainly to the high indices of incoming solar radiation. The daily average albedos of sugarcane at the crop development and mid-season stages were 0.16 and 0.20, respectively. Both models showed a better fit for the crop development stage than for the mid-season stage. When they were inter-compared, Monteith and Unsworth model was more efficient than Ortega-Farias model, despite the dispersion of their simulated radiation components which was similar.
    Źródło:
    International Agrophysics; 2017, 31, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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