no code implementations • 20 Mar 2024 • Ying Shuai Quan, Jian Zhou, Erik Frisk, Chung Choo Chung
This paper proposes a safety-critical controller for dynamic and uncertain environments, leveraging a robust environment control barrier function (ECBF) to enhance the robustness against the measurement and prediction uncertainties associated with moving obstacles.
no code implementations • 16 Oct 2023 • Jin Sung Kim, Ying Shuai Quan, Chung Choo Chung
Thus, we use the Koopman operator to represent the nonlinear dynamics of a vehicle in dynamic lane-keeping situations.
no code implementations • 18 Sep 2023 • Jin Sung Kim, Ying Shuai Quan, Chung Choo Chung
We approximate the Koopman operator in a finite-dimensional space with the autoencoder, while the approximated Koopman has an approximation uncertainty.
no code implementations • 16 Sep 2023 • Ying Shuai Quan, Jin Sung Kim, Chung Choo Chung
This paper proposes a Recurrent Neural Network (RNN) controller for lane-keeping systems, effectively handling model uncertainties and disturbances.
no code implementations • 11 Aug 2023 • Ju Won Seo, Jin Sung Kim, Chung Choo Chung
With the proposed DNN, we obtained the highest accuracy of 98. 0\% and 98. 6\% for two subregions near the vehicle.
no code implementations • 9 Feb 2022 • Yong Woo Jeong, Chung Choo Chung
In this paper, we present a Nonlinear-Proportional Integrator (N-PI) disturbance observer (DOB) to enhance the motion tracking of the performance of a surface-mounted Permanent Magnet Synchronous Motor (SPMSM) in rapidly speed varying regions.
no code implementations • 3 May 2021 • Ying Shuai Quan, Jin Sung Kim, Chung Choo Chung
In this paper, to reduce the computational complexity, Principal Component Analysis (PCA)-based parameter reduction is performed to obtain a reduced model with a tighter convex set.
no code implementations • 18 Feb 2018 • Seong Hyeon Park, ByeongDo Kim, Chang Mook Kang, Chung Choo Chung, Jun Won Choi
We employ the encoder-decoder architecture which analyzes the pattern underlying in the past trajectory using the long short-term memory (LSTM) based encoder and generates the future trajectory sequence using the LSTM based decoder.
no code implementations • 24 Apr 2017 • ByeoungDo Kim, Chang Mook Kang, Seung Hi Lee, Hyunmin Chae, Jaekyum Kim, Chung Choo Chung, Jun Won Choi
Our approach is data-driven and simple to use in that it learns complex behavior of the vehicles from the massive amount of trajectory data through deep neural network model.
2 code implementations • 8 Feb 2017 • Hyunmin Chae, Chang Mook Kang, ByeoungDo Kim, Jaekyum Kim, Chung Choo Chung, Jun Won Choi
In this paper, we propose a new autonomous braking system based on deep reinforcement learning.