Bifurcations of a Controlled Two-Bar Linkage Motion with Considering Viscous Frictions. (2011)

• Record Type: Journal Article
• Authors: Han, Qingkai; Zhao, Xueyan; Li, Xingxiu; Wen, Bangchun
• Is Part Of: Shock and vibration. Volume 2011(2011)
• Page Start: 365
• Page End: 375
• Publication Date: 2011
• Subjects: Two-bar linkage system -- OPCL controller -- viscous friction -- motion bifurcation -- chaos; Shock (Mechanics) -- Periodicals; Vibration -- Periodicals; 534.5
• DOI: 10.3233/SAV-2010-0571
• Languages: English
• ISSNs: 1070-9622

Abstract

Abstract : In this paper, we investigate the joint viscous friction effects on the motions of a two-bar linkage under controlling of OPCL. The dynamical model of the two-bar linkage with an OPCL controller is firstly set up with considering the two joints' viscous frictions. Thereafter, the motion bifurcations of the two-bar linkage along the values of joint viscous frictions are obtained using shooting method. Then, single-periodic, multiple-periodic, quasi-periodic and chaotic motions of link rotating angles are simulated with given different viscous friction values, and they are illustrated in time domain waveforms, phase space portraits, amplitude spectra and Poincare mapping graphs, respectively. Additionally, for the chaotic case, Lyapunov exponents and hypothesis possibilities of the two joint motions are also estimated.