Coupled chaotic oscillators and their relation to a central pattern generator for artificial quadrupeds |
| |
Authors: | Horacio Castellini Efta Yudiarsah Lilia Romanelli Hilda A. Cerdeira |
| |
Affiliation: | (1) Dpto. de Física, F.C.E.I.A., Pellegini 250, 2000 Rosario, Argentina;(2) Department of Physics and Astronomy, Ohio University, 45701 Athens, OH, USA;(3) Instituto de Ciencias, Universidad de General Sarmiento, J.M. Gutierrez 1150, 1613 Los Polvorines, Argentina;(4) Abdus Salam International Center for Theoretical Physics, P.O. Box 586, 34100 Trieste, Italy |
| |
Abstract: | Animal locomotion employs different periodic patterns known as animal gaits. In 1993, Collins and Stewart recognized that gaits possessed certain symmetries and characterized the gaits of quadrupeds and bipeds using permutation symmetry groups, which impose constraints on the locomotion center called the central pattern generator (CPG) in the animal brain. They modeled the CPG by coupling four nonlinear oscillators and found that it was possible to reproduce all symmetries of the gaits by changing the coupling strength. Here we propose to extend this idea using coupled chaotic oscillators synchronized using the Pyragas method in order to characterize the CPG symmetries. We also evaluate the time series behavior when the foot is in contact with the ground: this has potential robotic applications. |
| |
Keywords: | Animal gaits synchronization chaos |
本文献已被 SpringerLink 等数据库收录! |
|