Rloc: Terrain-aware legged locomotion using reinforcement learning and optimal control

S Gangapurwala, M Geisert, R Orsolino… - IEEE Transactions …, 2022 - ieeexplore.ieee.org
We present a unified model-based and data-driven approach for quadrupedal planning and
control to achieve dynamic locomotion over uneven terrain. We utilize on-board …

Not only rewards but also constraints: Applications on legged robot locomotion

Y Kim, H Oh, J Lee, J Choi, G Ji, M Jung… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
Several earlier studies have shown impressive control performance in complex robotic
systems by designing the controller using a neural network and training it with model-free …

Dynamics randomization revisited: A case study for quadrupedal locomotion

Z Xie, X Da, M Van de Panne… - … on Robotics and …, 2021 - ieeexplore.ieee.org
Understanding the gap between simulation and reality is critical for reinforcement learning
with legged robots, which are largely trained in simulation. However, recent work has …

Opt-mimic: Imitation of optimized trajectories for dynamic quadruped behaviors

Y Fuchioka, Z Xie… - 2023 IEEE International …, 2023 - ieeexplore.ieee.org
Reinforcement Learning (RL) has seen many recent successes for quadruped robot control.
The imitation of reference motions provides a simple and powerful prior for guiding solutions …

Imitate and repurpose: Learning reusable robot movement skills from human and animal behaviors

S Bohez, S Tunyasuvunakool, P Brakel… - arXiv preprint arXiv …, 2022 - arxiv.org
We investigate the use of prior knowledge of human and animal movement to learn reusable
locomotion skills for real legged robots. Our approach builds upon previous work on …

Learning a contact-adaptive controller for robust, efficient legged locomotion

X Da, Z Xie, D Hoeller, B Boots… - … on robot learning, 2021 - proceedings.mlr.press
We present a hierarchical framework that combines model-based control and reinforcement
learning (RL) to synthesize robust controllers for a quadruped (the Unitree Laikago). The …

Glide: Generalizable quadrupedal locomotion in diverse environments with a centroidal model

Z Xie, X Da, B Babich, A Garg, M de Panne - International Workshop on …, 2022 - Springer
Abstract Model-free reinforcement learning (RL) for legged locomotion commonly relies on a
physics simulator that can accurately predict the behaviors of every degree of freedom of the …

Adaptive locomotion control of a hexapod robot via bio-inspired learning

W Ouyang, H Chi, J Pang, W Liang… - Frontiers in …, 2021 - frontiersin.org
In this paper, an adaptive locomotion control approach for a hexapod robot is proposed.
Inspired from biological neuro control systems, a 3D two-layer artificial center pattern …

Real-time trajectory adaptation for quadrupedal locomotion using deep reinforcement learning

S Gangapurwala, M Geisert, R Orsolino… - … on Robotics and …, 2021 - ieeexplore.ieee.org
We present a control architecture for real-time adaptation and tracking of trajectories
generated using a terrain-aware trajectory optimization solver. This approach enables us to …

Efficient off-policy safe reinforcement learning using trust region conditional value at risk

D Kim, S Oh - IEEE Robotics and Automation Letters, 2022 - ieeexplore.ieee.org
This letter aims to solve a safe reinforcement learning (RL) problem with risk measure-based
constraints. As risk measures, such as conditional value at risk (CVaR), focus on the tail …