Ching-An Cheng

Robotics PhD student

School of Interactive Computing

Georgia Institute of Technology

Date: Tuesday, April 30, 2019

Time: 1:00pm - 3:00pm (EST)

Location: CCB 340

Committee:

Dr. Byron Boots (advisor), School of Interactive Computing, Georgia Institute of Technology

Dr. Seth Hutchinson, School of Interactive Computing, Georgia Institute of Technology

Dr. Karen Liu, School of Interactive Computing, Georgia Institute of Technology

Dr. Evangelos Theodorou, School of Aerospace Engineering, Georgia Institute of Technology

Dr. Geoff Gordon, Microsoft Research and Machine Learning Department, Carnegie Mellon University

Abstract:

Roboticists have long envisioned fully-automated robots that can operate reliably in unstructured environments. This is an exciting but extremely difficult problem; in order to succeed, robots must reason about sequential decisions and their consequences in face of uncertainty. As a result, in practice, the engineering effort required to build reliable robotic systems is both demanding and expensive. This research aims to provide a set of techniques for efficient and principled robot learning. It tackles this challenge from a theoretical perspective, in order to provide a panoramic perspective on the underlying difficulties and indicate systematic directions for improvement. A better theoretical formulation for system design, that more closely integrates analysis and practical needs, is a key to address current deficiencies. Here these theoretical principles are applied to design better algorithms in three important aspects of robot learning: policy optimization, uncertainty modeling, and development of structural policies. It uses and extends online learning, optimization, and control theory, and is demonstrated on applications including reinforcement and imitation learning, Gaussian process learning, and integrated motion planning and control. A shared feature across this research is the reciprocal interaction between the development of practical algorithms and the advancement of abstract analyses. Real-world challenges force the rethinking of proper theoretical formulations, which in turn lead to refined analyses and new algorithms that can rigorously leverage these insights to achieve better performance.