Open AccessDynamics of an Autoparametric Pendulum‐Like System with a Nonlinear Semiactive Suspension
Author(s) -
Krzysztof Kęcik,
Jerzy Warmiński
Publication year - 2011
Publication title -
mathematical problems in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.262
H-Index - 62
eISSN - 1026-7077
pISSN - 1024-123X
DOI - 10.1155/2011/451047
Subject(s) - pendulum , damper , magnetorheological fluid , nonlinear system , control theory (sociology) , suspension (topology) , vibration , engineering , parametric statistics , stiffness , spring (device) , double pendulum , parametric oscillator , inverted pendulum , structural engineering , physics , computer science , mathematics , acoustics , control (management) , mechanical engineering , electrical engineering , statistics , quantum mechanics , artificial intelligence , homotopy , pure mathematics
This paper presents vibration analysis of an autoparametric pendulum-like mechanism subjected to harmonic excitation. To improve dynamics and control motions, a new suspension composed of a semiactive magnetorheological damper and a nonlinear spring is applied. The influence of essential parameters such as the nonlinear damping or stiffness on vibration, near the main parametric resonance region, are carried out numerically and next verified experimentally in a special experimental rig. Results show that the magnetorheological damper, together with the nonlinear spring can be efficiently used to change the dynamic behaviour of the system. Furthermore, the nonlinear elements applied in the suspension of the autoparametric system allow to reduce the unstable areas and chaotic or rotating motion of the pendulum
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