Search Results for author: Dong Eui Chang

Found 17 papers, 3 papers with code

Machine learning based state observer for discrete time systems evolving on Lie groups

no code implementations20 Jan 2024 Soham Shanbhag, Dong Eui Chang

Conventional techniques involving machine learning based observers on systems evolving on Lie groups involve designing charts for the Lie group, training a machine learning based observer for each chart, and switching between the trained models based on the state of the system.

Transversally exponentially stable Euclidean space extension technique for discrete time systems

no code implementations20 Jan 2024 Soham Shanbhag, Dong Eui Chang

We propose a modification technique for discrete time systems for exponentially fast convergence to compact sets.

Globally exponentially convergent observer for systems evolving on matrix Lie groups

no code implementations20 Jan 2024 Soham Shanbhag, Dong Eui Chang

We propose a globally exponentially convergent observer for the dynamical system evolving on matrix Lie groups with bounded velocity with unknown bound.

Translation

Angular velocity and linear acceleration measurement bias estimators for the rigid body system with global exponential convergence

no code implementations20 Jan 2024 Soham Shanbhag, Dong Eui Chang

Rigid body systems usually consider measurements of the pose of the body using onboard cameras/LiDAR systems, that of linear acceleration using an accelerometer and of angular velocity using an IMU.

Feedback Gradient Descent: Efficient and Stable Optimization with Orthogonality for DNNs

1 code implementation12 May 2022 Fanchen Bu, Dong Eui Chang

In particular, inspired by a numerical integration method on manifolds called Feedback Integrators, we propose to instantiate it on the tangent bundle of the Stiefel manifold for the first time.

Computational Efficiency Image Classification +2

Robust Navigation for Racing Drones based on Imitation Learning and Modularization

no code implementations27 May 2021 Tianqi Wang, Dong Eui Chang

This paper presents a vision-based modularized drone racing navigation system that uses a customized convolutional neural network (CNN) for the perception module to produce high-level navigation commands and then leverages a state-of-the-art planner and controller to generate low-level control commands, thus exploiting the advantages of both data-based and model-based approaches.

Imitation Learning

The Adaptive Dynamic Programming Toolbox

1 code implementation29 Dec 2020 Xiaowei Xing, Dong Eui Chang

The paper develops the Adaptive Dynamic Programming Toolbox (ADPT), which solves optimal control problems for continuous-time nonlinear systems.

Double Prioritized State Recycled Experience Replay

no code implementations8 Jul 2020 Fanchen Bu, Dong Eui Chang

Experience replay enables online reinforcement learning agents to store and reuse the previous experiences of interacting with the environment.

Atari Games

Improved Reinforcement Learning through Imitation Learning Pretraining Towards Image-based Autonomous Driving

no code implementations16 Jul 2019 Tianqi Wang, Dong Eui Chang

We present a training pipeline for the autonomous driving task given the current camera image and vehicle speed as the input to produce the throttle, brake, and steering control output.

Autonomous Driving Imitation Learning +3

Deep Reinforcement Learning Based Robot Arm Manipulation with Efficient Training Data through Simulation

no code implementations16 Jul 2019 Xiaowei Xing, Dong Eui Chang

Deep reinforcement learning trains neural networks using experiences sampled from the replay buffer, which is commonly updated at each time step.

Robotics Systems and Control Systems and Control

A Dual Memory Structure for Efficient Use of Replay Memory in Deep Reinforcement Learning

no code implementations15 Jul 2019 Wonshick Ko, Dong Eui Chang

In this paper, we propose a dual memory structure for reinforcement learning algorithms with replay memory.

OpenAI Gym reinforcement-learning +1

Learning-Driven Exploration for Reinforcement Learning

1 code implementation17 Jun 2019 Muhammad Usama, Dong Eui Chang

We introduce entropy-based exploration (EBE) that enables an agent to explore efficiently the unexplored regions of state space.

Efficient Exploration FPS Games +2

Enhancement of Energy-Based Swing-Up Controller via Entropy Search

no code implementations2 Apr 2019 Chang Sik Lee, Dong Eui Chang

An energy based approach for stabilizing a mechanical system has offered a simple yet powerful control scheme.

Bayesian Optimization

Interaction-aware Kalman Neural Networks for Trajectory Prediction

no code implementations28 Feb 2019 Ce Ju, Zheng Wang, Cheng Long, Xiao-Yu Zhang, Gao Cong, Dong Eui Chang

Forecasting the motion of surrounding obstacles (vehicles, bicycles, pedestrians and etc.)

Robotics I.2.9; I.2.0

Towards Robust Neural Networks with Lipschitz Continuity

no code implementations22 Nov 2018 Muhammad Usama, Dong Eui Chang

Deep neural networks have shown remarkable performance across a wide range of vision-based tasks, particularly due to the availability of large-scale datasets for training and better architectures.

Data Augmentation

A Novel Representation of Neural Networks

no code implementations5 Oct 2016 Anthony Caterini, Dong Eui Chang

However, the representation is non-standardized, and the gradient calculation methods are often performed using component-based approaches that break parameters down into scalar units, instead of considering the parameters as whole entities.

A Geometric Framework for Convolutional Neural Networks

no code implementations15 Aug 2016 Anthony L. Caterini, Dong Eui Chang

In this paper, a geometric framework for neural networks is proposed.

Cannot find the paper you are looking for? You can Submit a new open access paper.