← Search

Keuntaek Lee

8 accepted papers

2022

Risk-sensitive MPCs with Deep Distributional Inverse RL for Autonomous Driving

IROS 2022poster

In robot learning from demonstration (LfD), a visual representation of a cost function inferred from Inverse Reinforcement Learning (IRL) provides an intuitive tool for humans to quickly interpret the underlying objectives of the demonstration. The inferred cost function can be used by controllers,…

Cited by 2SourceScholar
2022

Spatiotemporal Costmap Inference for MPC Via Deep Inverse Reinforcement Learning

RA-L 2022

It can be difficult to autonomously produce driver behavior so that it appears natural to other traffic participants. Through Inverse Reinforcement Learning (IRL), we can automate this process by learning the underlying reward function from human demonstrations. We propose a new IRL algorithm that l

Cited by 32SourceScholar
2021

Approximate Inverse Reinforcement Learning from Vision-based Imitation Learning

ICRA 2021poster

In this work, we present a method for obtaining an implicit objective function for vision-based navigation. The proposed methodology relies on Imitation Learning, Model Predictive Control (MPC), and an interpretation technique used in Deep Neural Networks. We use Imitation Learning as a means to do…

Cited by 18SourceScholar
2020

Aggressive Perception-Aware Navigation Using Deep Optical Flow Dynamics and PixelMPC

RA-L 2020

Recently, vision-based control has gained traction by leveraging the power of machine learning. In this work, we couple a model predictive control (MPC) framework to a visual pipeline. We introduce deep optical flow (DOF) dynamics, which is a combination of optical flow and robot dynamics. Using the

Cited by 36SourceScholar
2019

Early Failure Detection of Deep End-to-End Control Policy by Reinforcement Learning

ICRA 2019poster

We propose the use of Bayesian networks, which provide both a mean value and an uncertainty estimate as output, to enhance the safety of learned control policies under circumstances in which a test-time input differs significantly from the training set. Our algorithm combines reinforcement learning…

Cited by 12SourceScholar
2019

Locally Weighted Regression Pseudo-Rehearsal for Adaptive Model Predictive Control

CoRL 2019

We consider the problem of online adaptation of a neural network designed to represent system dynamics. The neural network model is intended to be used by an MPC control law for autonomous control. This problem is challenging because both input and target distributions are non-stationary, and naive

Cited by 0SourcePDFScholar
2019

Perceptual Attention-based Predictive Control

CoRL 2019

In this paper, we present a novel information processing architecture for safe deep learning-based visual navigation of autonomous systems. The proposed information processing architecture is used to support a perceptual attention-based predictive control algorithm that leverages model predictive co

Cited by 0SourcePDFScholar
2018

Agile Autonomous Driving using End-to-End Deep Imitation Learning

RSS 2018poster

We present an end-to-end imitation learning system for agile, off-road autonomous driving using only low-cost on-board sensors. By imitating a model predictive controller equipped with advanced sensors, we train a deep neural network control policy to map raw, high-dimensional observations to contin…

Cited by 396SourcePDFScholar