- Tytuł:
- Modeling and parameter identification of vibrations of a double torsion pendulum with friction
- Autorzy:
-
Czerwiński, E.
Olejnik, P.
Awrejcewicz, J. - Powiązania:
- https://bibliotekanauki.pl/articles/387504.pdf
- Data publikacji:
- 2015
- Wydawca:
- Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
- Tematy:
-
friction
planar contact
numerical modeling
double torsion pendulum
parameter identification
nonlinear vibrations
kinematic excitation
kinematic forcing mechanism
nelder-mead method
tarcie
modelowanie numeryczne
wahadło podwójne skręcane
identyfikacja parametrów
drgania nieliniowe
wzbudzanie kinematyczne
metoda Neldera-Meada - Opis:
- The purpose of this paper is to investigate a double torsion pendulum with planar frictional contact. The single torsion pendulum with one-degree-of-freedom is an angular equivalent of the linear harmonic oscillator. The second degree of freedom has been obtained by adding a free body to the inverted single torsion pendulum. The free body’s angular displacement is caused by frictional forces appearing in the interface (contact zone) between the free body and the pendulum column’s head kinematically excited at its base by a mechanism with torsion spiral spring. An experimental station has been set up and run to find most unknown parameters of the pendulum from the time series of state variables taken as inputs to the Nelder-Mead method of identification. The obtained results proved significant usability of the identification method in the case of numerical simulation of the pendulum’s dynamical model. It has not been satisfactorily proved in the case of time characteristics coming from a real system that exhibits also some unrecognized physical effects.
- Źródło:
-
Acta Mechanica et Automatica; 2015, 9, 4; 204-212
1898-4088
2300-5319 - Pojawia się w:
- Acta Mechanica et Automatica
- Dostawca treści:
- Biblioteka Nauki
Artykuł