Conference Proceedings

DDCO: Discovery of Deep Continuous Options for Robot Learning from Demonstrations

Discovery of Deep Continuous Options (DDCO) learns from demonstrations low-level continuous control skills parametrized by deep neural networks. A hybrid categorical–continuous distribution model parametrizes high-level policies that can invoke discrete options as well continuous control actions, and a cross-validation method tunes the number of options to be discovered. We evaluate DDCO in simulation of a 3-link robot, and in two physical experiments on the da Vinci surgical robot.

Sanjay Krishnan*, Roy Fox*, Ion Stoica, and Ken Goldberg, CoRL 2017
* Equal contribution

Preprints

Multi-Level Discovery of Deep Options

Existing techniques for automated option discovery do not scale to multi-level hierarchies and to expressive representations such as deep networks. We present Discovery of Deep Options (DDO), a policy-gradient algorithm that discovers parametrized options from a set of demonstration trajectories, and can be used recursively to discover additional levels of the hierarchy. We show that DDO is effective in adding options that accelerate learning in 4 out of 5 Atari RAM environments chosen in our experiments. We also show that DDO can discover structure in robot-assisted surgical videos and kinematics that match expert annotation with 72% accuracy.

Roy Fox*, Sanjay Krishnan*, Ion Stoica, and Ken Goldberg, arXiv, 2017
* Equal contribution