Comparative Study of Op-Amp-based Integrators Suitable for Fractional-Order Controller Design

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F19%3APU132417" target="_blank" >RIV/00216305:26220/19:PU132417 - isvavai.cz</a>

Výsledek na webu

<a href="https://ieeexplore.ieee.org/document/8768843" target="_blank" >https://ieeexplore.ieee.org/document/8768843</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TSP.2019.8768843" target="_blank" >10.1109/TSP.2019.8768843</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparative Study of Op-Amp-based Integrators Suitable for Fractional-Order Controller Design

Popis výsledku v původním jazyce

In this paper, a fractional-order capacitor (FOC) of an order λ = 0.89 (i.e. constant phase angle –80.1 degree) was emulated via Valsa RC network with five branches. The network component values were optimized using modified least squares quadratic method in a wide frequency range of 100 mHz–1 kHz (i.e. 4 decades) and maximum relative phase error 0.78% was obtained. The design specification corresponds to a speed control system of an armature controlled DC motor, which is often used in control theory. Overall performance evaluation shows the product of evaluated key features (e.g. phase angle deviation and absolute values of relative phase, impedance, and pseudocapacitance errors) for the optimized FOC is 13.3% less than the one obtained via Valsa approximation. The behavior of Op-Amp-based non-inverting configurations of analogue fractional-order integral operator s– employing the optimized FOC, where 0 < λ< 1, is compared. The behavior of studied integrator circuits is confirmed by SPICE simulations using the readily available Texas Instruments TL072 low-noise Op-Amp macromodel, which is commonly used in electronics.

Název v anglickém jazyce

Comparative Study of Op-Amp-based Integrators Suitable for Fractional-Order Controller Design

Popis výsledku anglicky

In this paper, a fractional-order capacitor (FOC) of an order λ = 0.89 (i.e. constant phase angle –80.1 degree) was emulated via Valsa RC network with five branches. The network component values were optimized using modified least squares quadratic method in a wide frequency range of 100 mHz–1 kHz (i.e. 4 decades) and maximum relative phase error 0.78% was obtained. The design specification corresponds to a speed control system of an armature controlled DC motor, which is often used in control theory. Overall performance evaluation shows the product of evaluated key features (e.g. phase angle deviation and absolute values of relative phase, impedance, and pseudocapacitance errors) for the optimized FOC is 13.3% less than the one obtained via Valsa approximation. The behavior of Op-Amp-based non-inverting configurations of analogue fractional-order integral operator s– employing the optimized FOC, where 0 < λ< 1, is compared. The behavior of studied integrator circuits is confirmed by SPICE simulations using the readily available Texas Instruments TL072 low-noise Op-Amp macromodel, which is commonly used in electronics.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20205 - Automation and control systems

Projekt

<a href="/cs/project/LTC18022" target="_blank" >LTC18022: Analogové fraktální systémy, jejich návrh a analýza</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 2019 42nd International Conference on Telecommunications and Signal Processing (TSP), Budapest, Hungary

ISBN

978-1-7281-1864-2

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

740-743

Název nakladatele

IEEE

Místo vydání

Budapest, Hungary

Místo konání akce

Budapest, Hungary

Datum konání akce

1. 7. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000493442800160