Programmable Central Pattern Generators: an Application to Biped Locomotion Control

— We present a system of coupled nonlinear oscillators to be used as programmable central pattern generators, and apply it to control the locomotion of a humanoid robot. Central pattern generators are biological neural networks that can produce coordinated multidimensional rhythmic signals, under the control of simple input signals. They are found both in vertebrate and invertebrate animals for the control of locomotion. In this article, we present a novel system composed of coupled adaptive nonlinear oscillators that can learn arbitrary rhythmic signals in a supervised learning framework. Using adaptive rules implemented as differential equations, parameters such as intrinsic frequencies, amplitudes, and coupling weights are automatically adjusted to replicate a teaching signal. Once the teaching signal is removed, the trajectories remain embedded as the limit cycle of the dynamical system. An interesting aspect of this approach is that the learning is completely embedded into the d...

• Type: Conference
• Year: 2006
• Where: ICRA
• Authors: Ludovic Righetti, Auke Jan Ijspeert
• Keywords: Central Pattern Generators, ICRA 2006, Nonlinear Oscillators, Rhythmic Signals, Robotics