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    Wyświetlanie 1-7 z 7
    Tytuł:
    The optimal online control of the instantaneous power and the multiphase source’s current
    Autorzy:
    Siwczyński, M.
    Hawron, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/200285.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    power source
    real-time control
    optimum
    operators
    źródło prądu
    kontrola w czasie rzeczywistym
    operator
    Opis:
    The paper presents the new optimal real-time control algorithm of the power source. The minimum of the square-instantaneous current was assumed as an optimal criterion, with an additional constraint on source instantaneous power. The mathematical model of a multiphase source was applied as a voltage-current convolution in the discrete time domain. The resulting control algorithm was the recursive digital filter with infinite recursion.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 6; 827-832
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization mathematical and physical models derived therefrom real-time models for the optimization of heating processes
    Wykorzystanie matematycznych i fizycznych modeli niedziałających w czasie rzeczywistym do optymalizacji procesu nagrzewania
    Autorzy:
    Špička, I.
    Heger, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/357018.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heating process
    mathematical and physical model
    real time control
    optimal control
    proces ogrzewania
    model matematyczny i fizyczny
    kontrola czasu rzeczywistego
    kontrola optymalna
    Opis:
    Heating of materials is energy and costly operations. On those reasons optimization is highly desirable. One of the possible solutions to optimize heating in real time is to use a large number of fast simulations on the basis of them the optimization algorithms have chosen the most appropriate option of the heating control. This solution implies the use of extremely fast but sufficiently accurate simplified mathematical models of heating, the structure and parameters of them are defined based on accurate modelling using computationally intensive but slower classical mathematical-physical models. Based on the operating data of the reheating furnace was build an accurate model of heating. Using the simplified model simulation of heating was done with different heating conditions with downtime during heating. Proposed algorithms including the simulations show that the proposed strategy leads to verifiable savings during heating.
    Nagrzewanie materiałów jest procesem energochłonnym i kosztowny. Dlatego optymalizacja tych procesów jest bardzo pożądana. Jednym z rozwiązań umożliwiających optymalizacje nagrzewania w czasie rzeczywistym jest przeprowadzenie dużej liczby szybkich symulacji, na podstawie których algorytmy optymalizacji wybierały najodpowiedniejszą wersję sterowania nagrzewaniem. Rozwiązanie takie zakłada stosowanie niezwykle szybkich ale wystarczająco dokładnych uproszczonych matematycznych modeli nagrzewania, których struktura i parametry określane są na podstawie dokładnych, ale wolno działających klasycznych modeli matematyczno-fizycznych. Na podstawie danych eksploatacyjnych pieca grzewczego zbudowano model dokładny, a następnie korzystając z jego wersji uproszczonych przeprowadzono symulacje dla różnych warunków nagrzewania uwzględniając przestoje w trakcie nagrzewania. Zaproponowane algorytmy wraz z wynikami symulacji pokazują, że proponowane podejście prowadzi do znaczących oszczędności w trakcie nagrzewania.
    Źródło:
    Archives of Metallurgy and Materials; 2013, 58, 3; 981-985
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of a Head Movement Navigation System for Mobile Telepresence Robot Using Open source Electronics Software and Hardware
    Autorzy:
    Wee, Tan Jia
    Wahid, Herman
    Powiązania:
    https://bibliotekanauki.pl/articles/1844566.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    telepresence
    head movement control
    real-time
    video streaming
    Bluetooth communication
    Opis:
    Head movement is frequently associated with human motion navigation, and an indispensable aspect of how humans interact with the surrounding environment. In spite of that, the incorporation of head motion and navigation is more often used in the VR (Virtual Reality) environment than the physical environment. This study aims to develop a robot car capable of simple teleoperation, incorporated with telepresence and head movement control for an on-robot real-time head motion mimicking mechanism and directional control, in attempt to provide users the experience of an avatar-like third person’s point of view amid the physical environment. The design consists of three processes running in parallel; Motion JPEG (MJPEG) live streaming to html-Site via local server, Bluetooth communication, and the corresponding movements for the head motion mimicking mechanism and motors which acts in accordance to head motion as captured by the Attitude Sensor and apparent command issued by the user. The design serves its purpose of demonstration with the usage of basic components and is not aimed to provide nor research with regards to user experience.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 3; 379-384
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rapid prototyping methodology of embedded control-acquisition system
    Autorzy:
    Augustyn, J.
    Bień, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/221129.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    embedded systems
    control and measurement systems
    hard real-time systems
    USB interface
    Opis:
    Modern control and measurement systems are equipped with interfaces to operate in local area networks and are typically intended to perform complicated data processing and control algorithms. The authors propose a digital system for rapid prototyping of target application devices. The concept solution separates the processing and control section from the hardware interface and user interface section. Both sections constitute independent ARM-based controllers interconnected via a direct USB link. Popular libraries can be used and low-level procedures developed, which enhances the system's economic viability. A test unit developed for the purpose of the study was built around a SoC ARM7 microsystem and an off-the-shelf palmtop device. It demonstrated a continuous data stream transfer capability up to 150 kB per second, which was sufficient to monitor the performance of an electricity line.
    Źródło:
    Metrology and Measurement Systems; 2012, 19, 4; 777-786
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction of new GFP-tagged fusants for Trichoderma harzianum with enhanced biocontrol activity
    Autorzy:
    Kowsari, M.
    Motallebi, M.
    Zamani, R.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/66878.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biomonitor
    construction
    Trichoderma harzianum
    biological control
    green fluorescent protein
    real-time polymerase chain reaction
    Opis:
    Trichoderma is one of the most exploited biocontrol agents for the management of plant diseases. In biocontrol ecology, the critical factors are detection, and the monitoring and recovery of specific biocontrol agents either naturally present or deliberately released into the environment. Protoplast fusion is an appropriate tool for the improvement of biocontrol Trichoderma strains. Protoplast isolation from Trichoderma harzianum was achieved using 24 h culture age, 6.6 mg/ml Novazym L 1412 at 30°C which resulted the maximum protoplast yield of 5 × 108/ml. The self-fused protoplasts were regenerated and 12 fusants were selected based on their growth rate on 2% colloidal chitin medium. Next, a comparison was done for chitinase and antagonistic activity. Transcriptomic analysis based on quantitative real-time RT-PCR, demonstrated that T8-05 fusant expressed 1.5 fold of chit42 transcript as compared with the parental line. This fusant with 7.02±0.15U chitinase activity showed a higher growth inhibition rate (100%) than the parent strain, against Rhizoctonia solani. To obtain a genetically marked fusant that can be used as a biomonitor, the fusant was cotransformed with the gfp and amdS genes. The morphology and viability of selected cotransformant (FT8-7MK-05-2) was similar to the parent. Green fluorescing conidia were observed within the first 2 days of incubation in the soil, and this was followed by the formation of chlamydopores after 60 days. The colonisation of the gfp-tagged fusant was also monitored visually on R. solani sclerotia by scanning electron microscopy. Production of gfp-tagged fusant of Trichoderma spp. provides a potentially useful tool for monitoring hyphal growth patterns and the population of biocontrol agent isolates introduced into environmental systems.
    Źródło:
    Journal of Plant Protection Research; 2014, 54, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation of IEC 61850 power protection tester in Linux environment
    Autorzy:
    Kurek, K.
    Nogal, Ł.
    Kowalik, R.
    Januszewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/202357.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    implementation in real time
    power systems
    protective relay testing
    digital control systems
    IEC 61850
    Opis:
    Software power protection tester implemented in a real-time operating system (RTOS) might replace the conventional testing setups in IEC 61850 protection systems. This paper describes an open power protection testing platform. Linux RT capabilities related to runtime environment for such a tester are examined and OS latency sources are identified and evaluated. An algorithm for a multithreaded tester operation is proposed, including Sampled Values (SV) publisher, GOOSE input/output and time synchronization. SV and GOOSE services implemented in RT Linux environment are evaluated in accordance with IEC 61850‒5 transfer time requirements. Linux PTP time synchronization service of two similar systems controlling its electrical ports is evaluated in different synchronization scenarios. The developed tester is compared to an equivalent conventional setup during the test of IED over-current function. The conducted tests show that the Linux implementation of power protection tester in the case of scheduler latency, time synchronization accuracy and transfer time all meet the requirements of IEC 61850.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 689-696
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel solutions on model-based and model-free robotic-assisted ankle rehabilitation
    Autorzy:
    Arceo, Juan Carlos
    Alvarez, Jorge
    Armenta, Carlos
    Lauber, Jimmy
    Cremoux, Sylvian
    Simoneau-Buessinger, Emilie
    Bernal, Miguel
    Powiązania:
    https://bibliotekanauki.pl/articles/1409032.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    active disturbance rejection
    computed torque control
    differential algebraic equations
    parallel rehabilitation robot
    real-time implementation
    system identification
    Opis:
    In this report, ankle rehabilitation routines currently approved by physicians are implemented via novel control algorithms on a recently appeared robotic device known as the motoBOTTE. The physician specifications for gait cycles are translated into robotic trajectories whose tracking is performed twofold depending on the availability of a model: (1) if obtained via the Euler-Lagrange approach along with identification of unknown plant parameters, a new computed-torque control law is proposed; it takes into account the parallel-robot characteristics; (2) if not available, a variation of the active disturbance rejection control technique whose parameters need to be tuned, is employed. A detailed discussion on the advantages and disadvantages of the model-based and model-free results, from the continuous-time simulation to the discrete-time implementation, is included.
    Źródło:
    Archives of Control Sciences; 2021, 31, 1; 5-27
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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