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Wyszukujesz frazę "Ionescu, C." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Hands-on MPC tuning for industrial applications
Autorzy:
Ionescu, C.
Copot, D.
Powiązania:
https://bibliotekanauki.pl/articles/200293.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
step response
first order plus dead time
predictive control
hands-on tuning
model based control
model uncertainty
robustness
control education
plant operator
Opis:
This paper proposes a practical tuning of closed loops with model based predictive control. The data assumed to be known from the process is the result of the bump test commonly applied in industry and known in engineering as step response data. A simplified context is assumed such that no prior know-how is required from the plant operator. The relevance of this assumption is very realistic in the context of first time users, both for industrial operators and as educational competence of first hand student training. A first order plus dead time is approximated and the controller parameters immediately follow by heuristic rules. Analysis has been performed in simulation on representative dynamics with guidelines for the various types of processes. Three single-input-single-output experimental setups have been used with no expert users available in different locations – both educational and industrial – these setups are representative for practical cases: a variable time delay dominant system, a non-minimum phase system and an open loop unstable system. Furthermore, in a multivariable control context, a train of separation columns has been tested for control in simulation, followed by experimental tests on a laboratory system with similar dynamics, i.e. a sextuple coupled water tank system. The results indicate the proposed methodology is suitable for hands-on tuning of predictive control loops with some limitations on performance and multivariable process control.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 5; 925-945
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional order based velocity control system for a nanorobot in non-Newtonian fluids
Autorzy:
Muresan, C. I.
Birs, I. R.
Folea, S.
Ionescu, C.
Powiązania:
https://bibliotekanauki.pl/articles/200089.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
non-Newtonian fluids
drag force
velocity control
fractional calculus
płyny nienewtonowskie
kontrola prędkości
rachunek ułamkowy
Opis:
Customized patient drug delivery overcomes classic medicine setbacks such as side effects, improper drug absorption or slow action. Nanorobots can be successfully used for targeted patient-specific drug administration, but they must be reliable in the entire circulatory system environment. This paper analyzes the possibility of fractional order control applied to the nanomedicine field. The parameters of a fractional order proportional integral controller are determined with the purpose of controlling the velocity of the nanorobot in non-Newtonian fluids envisioning the blood flow in the circulatory system.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 6; 991-997
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination Of Gas Mixture Components Using Fluctuation Enhanced Sensing And The LS-SVM Regression Algorithm
Autorzy:
Lentka, Ł.
Smulko, J. M.
Ionescu, R.
Granqvist, C. G.
Kish, L. B.
Powiązania:
https://bibliotekanauki.pl/articles/221708.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
LS-SVM algorithm
resistance gas sensor
fluctuation enhanced sensing
gas detection
Opis:
This paper analyses the effectiveness of determining gas concentrations by using a prototype WO3 resistive gas sensor together with fluctuation enhanced sensing. We have earlier demonstrated that this method can determine the composition of a gas mixture by using only a single sensor. In the present study, we apply Least-Squares Support-Vector-Machine-based (LS-SVM-based) nonlinear regression to determine the gas concentration of each constituent in a mixture. We confirmed that the accuracy of the estimated gas concentration could be significantly improved by applying temperature change and ultraviolet irradiation of the WO3 layer. Fluctuation-enhanced sensing allowed us to predict the concentration of both component gases.
Źródło:
Metrology and Measurement Systems; 2015, 22, 3; 341-350
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evolution of some blood parameters in hypovolemia conditions in rabbits
Autorzy:
Cotor, G.
Zagrai, G.
Gâjâilă, G.
Ghiță, M.
Ionescu, A.M.
Damian, A.
Zagrai (Măierean), A.M.
Dragosloveanu, Ș.
Cotor, D.C.
Powiązania:
https://bibliotekanauki.pl/articles/2087152.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
blood parameters
hematology
hypovolemia
rabbits
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 4; 589-594
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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