Temat: flexible approach - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Approximate controllability of second order infinite dimensional systems
Autorzy:: Klamka, Jerzy
Khurshudyan, Asatur Zh.
Powiązania:: https://bibliotekanauki.pl/articles/1409079.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: infinite dimensional systems
approximate controllability
Green’s function approach
flexible Kirchhoff–Love plate
Opis:: In the paper approximate controllability of second order infinite dimensional system with damping is considered. Applying linear operators in Hilbert spaces general mathematical model of second order dynamical systems with damping is presented. Next, using functional analysis methods and concepts, specially spectral methods and theory of unbounded linear operators, necessary and sufficient conditions for approximate controllability are formulated and proved. General result may be used in approximate controllability verification of second order dynamical system using known conditions for approximate controllability of first order system. As illustrative example using Green function approach approximate controllability of distributed dynamical system is also discussed.
Źródło:: Archives of Control Sciences; 2021, 31, 1; 165-184
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Model-based initial residual unbalance identification for rotating machines in one and two planes using an iterative inverse approach
Autorzy:: Bastakoti, Satish
Choudhury, Tuhin
Viitala, Risto
Kurvinen, Emil
Sopanen, Jussi
Powiązania:: https://bibliotekanauki.pl/articles/2090689.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: flexible rotor
inverse approach
onsite-balancing
residual unbalance
single plane
double plane
wirnik elastyczny
metoda odwrotna
płaszczyzna pojedyńcza
płaszczyzna podwójna
Opis:: To achieve acceptable dynamical behavior for large rotating machines operating at subcritical speeds, the balancing quality check at the planned service speed in the installation location is often demanded for machines such as turbo-generators or high-speed machines. While most studies investigate the balancing quality at critical speeds, only a few studies have investigated this aspect using numerical methods at operational speed. This study proposes a novel, model-based method for inversely estimating initial residual unbalance in one and two planes after initial grade balancing for large flexible rotors operating at the service speeds. The method utilizes vibration measurements from two planes in any single direction, combined with a finite element model of the rotor to inversely determine the residual unbalance in one and two planes. This method can be practically used to determine the initial and residual unbalance after the balancing process, and further it can be used for condition-based monitoring of the unbalance state of the rotor.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 6; e139790, 1--12
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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