@misc{cogprints4967, volume = {123}, editor = {Luc Berthouze and Fr{\'e}d{\'e}ric Kaplan and Hideki Kozima and Hiroyuki Yano and J{\"u}rgen Konczak and Giorgio Metta and Jacqueline Nadel and Giulio Sandini and Georgi Stojanov and Christian Balkenius}, title = {Exploiting Vestibular Output during Learning Results in Naturally Curved Reaching Trajectories}, author = {Ganghua Sun and Brian Scassellati}, publisher = {Lund University Cognitive Studies}, year = {2005}, pages = {71--77}, keywords = {vestibular system, Nico humanoid robot, reaching trajectory, radial basis function network, degrees-of-freedom problem, developmental robot}, url = {http://cogprints.org/4967/}, abstract = {Teaching a humanoid robot to reach for a visual target is a complex problem in part because of the high dimensionality of the control space. In this paper, we demonstrate a biologically plausible simplification of the reaching process that replaces the degrees of freedom in the neck of the robot with sensory readings from a vestibular system. We show that this simplification introduces errors that are easily overcome by a standard learning algorithm. Furthermore, the errors that are necessarily introduced by this simplification result in reaching trajectories that are curved in the same way as human reaching trajectories.} }