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    Wyświetlanie 1-6 z 6
    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:
    Current mode fractional order filters using VDTAs with Grounded capacitors
    Autorzy:
    Prasad, Dinesh
    Kumar, Mayank
    Akram, Md Waseem
    Powiązania:
    https://bibliotekanauki.pl/articles/226881.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    VDTAs
    fractional order and filter
    Opis:
    In this work, the design of current mode Fractional order filter using VDTAs (Voltage differencing trans-conductance amplifier) as an active element with grounded capacitors has been proposed. The approximate transfer functions of low and high pass filters of fractional order on the basis of the integer order transfer has been shown and the form of those functions of filters is also implemented using VDTA as an active building block. In this work, filters of the different sequence have been realized. The frequency domain simulation results of the proposed filters are obtained on Matlab and PSPICE with TSMC CMOS 180 nm technology parameters. Stability and sensitivity is also verified.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 1; 11-17
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of dynamic properties of parametric and fractional-order filters
    Autorzy:
    Jakubowska-Ciszek, Agnieszka
    Piwowar, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/377115.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    parametric filter
    fractional-order filter
    filter dynamic models
    LTV filters
    dynamic properties
    Opis:
    The paper presents transmission models of a parametric filter with non-periodically variable parameters and a fractional-order filter. The responses of these filters on a unit step excitation have been examined as well as the dependence of filters time responses on their parameters. The obtained results have been illustrated by examples.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2019, 97; 133-142
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite length triple estimation algorithm and its application to gyroscope mems noise identification
    Autorzy:
    Macias, Michał
    Sierociuk, Dominik
    Powiązania:
    https://bibliotekanauki.pl/articles/2204616.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    fractional calculus
    fractional Kalman filter
    estimation of fractional order systems
    fractional order noise
    Opis:
    The noises associated with MEMS measurements can significantly impact their accuracy. The noises characterised by random walk and bias instability errors strictly depend on temperature effects that are difficult to specify during direct measurements. Therefore, the paper aims to estimate the fractional noise dynamics of the stationary MEMS gyroscope based on finite length triple estimation algorithm (FLTEA). The paper deals with the state, order and parameter estimation of fractional order noises originating from the MEMS gyroscope, being part of the popular Inertial Measurement Unit denoted as SparkFun MPU9250. The noise measurements from , and gyroscope axes are identified using a modified triple estimation algorithm (TEA) with finite approximation length. The TEA allows a simultaneous estimation of the state, order and parameter of fractional order systems. Moreover, as it is well-known that the number of samples in fractional difference approximations plays a key role, we try to show the influence of applying the TEA with various approximation length constraints on final estimation results. The validation of finite length TEA in the noise estimation process coming from MEMS gyroscope has been conducted for implementation length reduction achieving 50% of samples needed to estimate the noise with no implementation losses. Additionally, the capabilities of modified TEA in the analysis of fractional constant and variable order systems are confirmed in several numerical examples.
    Źródło:
    Acta Mechanica et Automatica; 2023, 17, 2; 219--229
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractional Kalman Filter algorithms for correlated system and measurement noises
    Autorzy:
    Sierociuk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/206137.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    fractional order calculus
    discrete fractional state-space systems
    fractional Kalman filter
    Opis:
    The paper presents a generalization of the Fractional Kalman Filter to a case when correlated system and measurement noises appear. The algorithm proposed is derived in detail for a linear generalized discrete fractional order state-space system for both constant and variable order cases. In order to present the efficiency of the proposed algorithm, results of numerical simulations are presented. Results of numerical experiments are compared with the effect of estimation obtained when using the traditional Fractional Kalman Filter algorithm.
    Źródło:
    Control and Cybernetics; 2013, 42, 2; 471-490
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractional Kalman filter algorithm for the states, parameters and order of fractional system estimation
    Autorzy:
    Sierociuk, D.
    Dzieliński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/908456.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przestrzeń fazowa
    układ ułamkowy
    filtr Kalmana
    estymacja parametryczna
    discrete fractional state-space systems
    fractional Kalman filter
    parameter estimation
    order estimation
    extended fractional Kalman filter
    Opis:
    This paper presents a generalization of the Kalman filter for linear and nonlinear fractional order discrete state-space systems. Linear and nonlinear discrete fractional order state-space systems are also introduced. The simplified kalman filter for the linear case is called the fractional Kalman filter and its nonlinear extension is named the extended fractional Kalman filter. The background and motivations for using such techniques are given, and some algorithms are discussed. The paper also shows a simple numerical example of linear state estimation. Finally, as an example of nonlinear estimation, the paper discusses the possibility of using these algorithms for parameters and fractional order estimation for fractional order systems. Numerical examples of the use of these algorithms in a general nonlinear case are presented.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2006, 16, 1; 129-140
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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