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This paper presents reinforcement learning (RL) policies for dynamic quadrupedal locomotion in planetary exploration scenarios. Building on a taskoptimized quadruped with a 5-bar leg design, we develop RL policies for walking, vertical…

Robotics · Computer Science 2026-05-26 Jørgen Anker Olsen , Kostas Alexis

Quadruped locomotion provides a natural setting for understanding when model-free learning can outperform model-based control design, by exploiting data patterns to bypass the difficulty of optimizing over discrete contacts and the…

Machine Learning · Computer Science 2026-03-10 Ruipeng Zhang , Hongzhan Yu , Ya-Chien Chang , Chenghao Li , Henrik I. Christensen , Sicun Gao

We propose a method for learning dynamical systems from high-dimensional empirical data that combines variational autoencoders and (spatio-)temporal attention within a framework designed to enforce certain scientifically-motivated…

Machine Learning · Computer Science 2023-06-22 Kai Lagemann , Christian Lagemann , Sach Mukherjee

Data-efficient reinforcement learning (RL) in continuous state-action spaces using very high-dimensional observations remains a key challenge in developing fully autonomous systems. We consider a particularly important instance of this…

Artificial Intelligence · Computer Science 2015-10-12 John-Alexander M. Assael , Niklas Wahlström , Thomas B. Schön , Marc Peter Deisenroth

Recently, many reinforcement learning techniques were shown to have provable guarantees in the simple case of linear dynamics, especially in problems like linear quadratic regulators. However, in practice, many reinforcement learning…

Machine Learning · Computer Science 2020-06-30 Abraham Frandsen , Rong Ge

The enhanced mobility brought by legged locomotion empowers quadrupedal robots to navigate through complex and unstructured environments. However, optimizing agile locomotion while accounting for the varying energy costs of traversing…

Legged robots are well-suited for navigating terrains inaccessible to wheeled robots, making them ideal for applications in search and rescue or space exploration. However, current control methods often struggle to generalize across…

Robotics · Computer Science 2025-05-19 Nikita Rudin , Junzhe He , Joshua Aurand , Marco Hutter

State-of-the-art reinforcement learning is now able to learn versatile locomotion, balancing and push-recovery capabilities for bipedal robots in simulation. Yet, the reality gap has mostly been overlooked and the simulated results hardly…

Robotics · Computer Science 2023-01-02 Alexis Duburcq , Fabian Schramm , Guilhem Boéris , Nicolas Bredeche , Yann Chevaleyre

Developing robust locomotion controllers for bipedal robots with closed kinematic chains presents unique challenges, particularly since most reinforcement learning (RL) approaches simplify these parallel mechanisms into serial models during…

This work presents reinforcement learning (RL)-driven data augmentation to improve the generalization of vision-action (VA) models for dexterous grasping. While real-to-sim-to-real frameworks, where a few real demonstrations seed…

Robotics · Computer Science 2025-04-28 Atsushi Kanehira , Naoki Wake , Kazuhiro Sasabuchi , Jun Takamatsu , Katsushi Ikeuchi

Robust bipedal locomotion in exoskeletons requires the ability to dynamically react to changes in the environment in real time. This paper introduces the hybrid data-driven predictive control (HDDPC) framework, an extension of the…

Robotics · Computer Science 2025-08-15 Kejun Li , Jeeseop Kim , Maxime Brunet , Marine Pétriaux , Yisong Yue , Aaron D. Ames

In real-world sequential decision making tasks like autonomous driving, robotics, and healthcare, learning from observed state-action trajectories is critical for tasks like imitation, classification, and clustering. For example,…

Machine Learning · Computer Science 2025-01-20 Zichang Ge , Changyu Chen , Arunesh Sinha , Pradeep Varakantham

Recurrent neural network-based reinforcement learning systems are capable of complex motor control tasks such as locomotion and manipulation, however, much of their underlying mechanisms still remain difficult to interpret. Our aim is to…

Robotics · Computer Science 2023-06-29 Eugene R. Rush , Christoffer Heckman , Kaushik Jayaram , J. Sean Humbert

This paper addresses the problem of legged locomotion in non-flat terrain. As legged robots such as quadrupeds are to be deployed in terrains with geometries which are difficult to model and predict, the need arises to equip them with the…

Robotics · Computer Science 2020-02-03 Vassilios Tsounis , Mitja Alge , Joonho Lee , Farbod Farshidian , Marco Hutter

Quadrupedal locomotion over complex terrain has been a long-standing research topic in robotics. While recent reinforcement learning-based locomotion methods improve generalizability and foot-placement precision, they rely on implicit…

Robotics · Computer Science 2026-04-06 Matthew Hwang , Yubin Liu , Ryo Hakoda , Takeshi Oishi

For legged robots to match the athletic capabilities of humans and animals, they must not only produce robust periodic walking and running, but also seamlessly switch between nominal locomotion gaits and more specialized transient…

Robotics · Computer Science 2022-07-19 Fangzhou Yu , Ryan Batke , Jeremy Dao , Jonathan Hurst , Kevin Green , Alan Fern

Robotic exoskeletons are exciting technologies for augmenting human mobility. However, designing such a device for seamless integration with the human user and to assist human movement still is a major challenge. This paper aims at…

Robotics · Computer Science 2020-11-13 Xikai Tu , Minhan Li , Ming Liu , Jennie Si , He , Huang

Bipedal walking is one of the most important hallmarks of human that robots have been trying to mimic for many decades. Although previous control methodologies have achieved robot walking on some terrains, there is a need for a framework…

Robotics · Computer Science 2025-12-01 Chrysostomos Karakasis , Ioannis Poulakakis , Panagiotis Artemiadis

Despite the progress in legged robotic locomotion, autonomous navigation in unknown environments remains an open problem. Ideally, the navigation system utilizes the full potential of the robots' locomotion capabilities while operating…

Robotics · Computer Science 2023-02-15 Jonas Frey , David Hoeller , Shehryar Khattak , Marco Hutter

Traversing risky terrains with sparse footholds presents significant challenges for legged robots, requiring precise foot placement in safe areas. To acquire comprehensive exteroceptive information, prior studies have employed motion…

Robotics · Computer Science 2025-03-04 Ruiqi Yu , Qianshi Wang , Yizhen Wang , Zhicheng Wang , Jun Wu , Qiuguo Zhu