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Reinforcement learning (RL) has been recognized as a powerful tool for robot control tasks. RL typically employs reward functions to define task objectives and guide agent learning. However, since the reward function serves the dual purpose…

Machine Learning · Computer Science 2025-12-10 Zhao Yu , Xiuping Wu , Liangjun Ke

Offline reinforcement learning (RL) aims to optimize the return given a fixed dataset of agent trajectories without additional interactions with the environment. While algorithm development has progressed rapidly, significant theoretical…

Machine Learning · Computer Science 2025-08-12 Fengdi Che

Reinforcement learning (RL) has re-emerged as a natural approach for training interactive LLM agents in real-world environments. However, directly applying the widely used Group Relative Policy Optimization (GRPO) algorithm to multi-turn…

Machine Learning · Computer Science 2026-01-27 Junbo Li , Peng Zhou , Rui Meng , Meet P. Vadera , Lihong Li , Yang Li

Safe reinforcement learning (SafeRL) is a prominent paradigm for autonomous driving, where agents are required to optimize performance under strict safety requirements. This dual objective creates a fundamental tension, as overly…

Machine Learning · Computer Science 2025-12-24 Mahesh Keswani , Raunak Bhattacharyya

Mastering deep reinforcement learning (DRL) proves challenging in tasks featuring scant rewards. These limited rewards merely signify whether the task is partially or entirely accomplished, necessitating various exploration actions before…

Machine Learning · Computer Science 2024-04-11 Guojian Wang , Faguo Wu , Xiao Zhang

In this work the problem of path planning for an autonomous vehicle that moves on a freeway is considered. The most common approaches that are used to address this problem are based on optimal control methods, which make assumptions about…

Robotics · Computer Science 2020-02-19 Konstantinos Makantasis , Maria Kontorinaki , Ioannis Nikolos

Offline reinforcement learning has emerged as a promising technology by enhancing its practicality through the use of pre-collected large datasets. Despite its practical benefits, most algorithm development research in offline reinforcement…

Machine Learning · Computer Science 2024-10-23 Dongsu Lee , Chanin Eom , Minhae Kwon

Autonomous UAV inspection of confined industrial infrastructure, such as ventilation ducts, demands robust navigation policies where collisions are unacceptable. While Deep Reinforcement Learning (DRL) offers a powerful paradigm for…

This paper endeavors to augment the robustness of offline reinforcement learning (RL) in scenarios laden with heavy-tailed rewards, a prevalent circumstance in real-world applications. We propose two algorithmic frameworks, ROAM and ROOM,…

Machine Learning · Computer Science 2024-04-02 Jin Zhu , Runzhe Wan , Zhengling Qi , Shikai Luo , Chengchun Shi

Developing decision-making algorithms for highly automated driving systems remains challenging, since these systems have to operate safely in an open and complex environments. Reinforcement Learning (RL) approaches can learn comprehensive…

Robotics · Computer Science 2025-07-01 M. Youssef Abdelhamid , Lennart Vater , Zlatan Ajanovic

Reinforcement learning (RL) in autonomous driving employs a trial-and-error mechanism, enhancing robustness in unpredictable environments. However, crafting effective reward functions remains challenging, as conventional approaches rely…

Machine Learning · Computer Science 2025-06-02 Yongming Chen , Miner Chen , Liewen Liao , Mingyang Jiang , Xiang Zuo , Hengrui Zhang , Yuchen Xi , Songan Zhang

Trajectory planning is a core task in autonomous driving, requiring the prediction of safe and comfortable paths across diverse scenarios. Integrating Multi-modal Large Language Models (MLLMs) with Reinforcement Learning (RL) has shown…

Robotics · Computer Science 2026-02-02 Xidong Li , Mingyu Guo , Chenchao Xu , Bailin Li , Wenjing Zhu , Yangang Zou , Rui Chen , Zehuan Wang

Offline reinforcement learning (RL) learns effective policies from pre-collected datasets, offering a practical solution for applications where online interactions are risky or costly. Model-based approaches are particularly advantageous…

Machine Learning · Computer Science 2026-05-14 Xuyang Chen , Keyu Yan , Guojian Wang , Lin Zhao

Reinforcement learning can enable robots to navigate to distant goals while optimizing user-specified reward functions, including preferences for following lanes, staying on paved paths, or avoiding freshly mowed grass. However, online…

Robotics · Computer Science 2022-12-19 Dhruv Shah , Arjun Bhorkar , Hrish Leen , Ilya Kostrikov , Nick Rhinehart , Sergey Levine

Robust reinforcement learning (RL) aims to learn policies that remain effective despite uncertainties in its environment, which frequently arise in real-world applications due to variations in environment dynamics. The robust RL methods…

Machine Learning · Computer Science 2025-05-30 Linh Le Pham Van , Minh Hoang Nguyen , Hung Le , Hung The Tran , Sunil Gupta

Offline Safe Reinforcement Learning (RL) seeks to address safety constraints by learning from static datasets and restricting exploration. However, these approaches heavily rely on the dataset and struggle to generalize to unseen scenarios…

Robotics · Computer Science 2025-03-04 Chenyang Cao , Yucheng Xin , Silang Wu , Longxiang He , Zichen Yan , Junbo Tan , Xueqian Wang

Reinforcement learning is considered as a promising direction for driving policy learning. However, training autonomous driving vehicle with reinforcement learning in real environment involves non-affordable trial-and-error. It is more…

Artificial Intelligence · Computer Science 2017-09-27 Xinlei Pan , Yurong You , Ziyan Wang , Cewu Lu

Safe reinforcement learning (RL) offers advanced solutions to constrained optimal control problems. Existing studies in safe RL implicitly assume continuity in policy functions, where policies map states to actions in a smooth,…

Machine Learning · Computer Science 2024-03-29 Wenjun Zou , Yao Lyu , Jie Li , Yujie Yang , Shengbo Eben Li , Jingliang Duan , Xianyuan Zhan , Jingjing Liu , Yaqin Zhang , Keqiang Li

Sample efficiency and exploration remain major challenges in online reinforcement learning (RL). A powerful approach that can be applied to address these issues is the inclusion of offline data, such as prior trajectories from a human…

Machine Learning · Computer Science 2023-06-01 Philip J. Ball , Laura Smith , Ilya Kostrikov , Sergey Levine

Visual-Language-Action (VLA) models have demonstrated strong cross-scenario generalization capabilities in various robotic tasks through large-scale pre-training and task-specific fine-tuning. However, their training paradigm mainly relies…

Robotics · Computer Science 2025-09-30 Zengjue Chen , Runliang Niu , He Kong , Qi Wang , Qianli Xing , Zipei Fan