Perception-driven adaptive CPG-based locomotion for hexapod robots

International audienceAccording to neurobiological studies, rhythmic motion in animals is controlled by neural circuits known as central pattern gener- ators (CPGs), which are robust against transient perturbations. Yet, CPGs can integrate sensory feedback that potentially enables adaptive locomotion solutions. Despite of previous works, the construction of practical embedded neuromorphic locomotion sys- tems exhibiting similar properties and organization observed in CPGs is still reduced. In this paper a CPG-based control strategy able to modulate motion speed and manage smoothly gait transitions in hexapod robots according to visual information is proposed. Fuzzy logic and finite state machines are the base of the proposed integration mechanism used to map perception into locomotion parameters according to a sensed situation. A vision sensor is integrated in the CPG-based control loop to provide feedback in obstacle avoidance and target tracking behaviors within simplified unknown environments. Experimental results using an hexapod robot confirm both the effectiveness of the proposed control strategy and its use as a experimental embedded platform to investigate further adaptive locomotion, particularly about ways that biological systems fuse information from visual cues to adapt locomotion