Robotic Playing for Hierarchical Complex Skill Learning
This addresses generalization challenges in robotics for complex manipulation tasks, but it appears incremental as it builds on existing skill-based methods.
The paper tackles the problem of generalization in complex robotic manipulation by proposing a paradigm where simpler controllers solve tasks in specific situations, and the robot transforms novel situations into known ones using skill hierarchies learned through autonomous playing, achieving evaluation in complex pick-and-place scenarios.
In complex manipulation scenarios (e.g. tasks requiring complex interaction of two hands or in-hand manipulation), generalization is a hard problem. Current methods still either require a substantial amount of (supervised) training data and / or strong assumptions on both the environment and the task. In this paradigm, controllers solving these tasks tend to be complex. We propose a paradigm of maintaining simpler controllers solving the task in a small number of specific situations. In order to generalize to novel situations, the robot transforms the environment from novel situations into a situation where the solution of the task is already known. Our solution to this problem is to play with objects and use previously trained skills (basis skills). These skills can either be used for estimating or for changing the current state of the environment and are organized in skill hierarchies. The approach is evaluated in complex pick-and-place scenarios that involve complex manipulation. We further show that these skills can be learned by autonomous playing.