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Zichen Yan

5 accepted papers

2026

SIGN: Safety-Aware Image-Goal Navigation for Autonomous Drones Via Reinforcement Learning

ICRA 2026poster

Image-goal navigation (ImageNav) tasks a robot with autonomously exploring an unknown environment and reaching a location that visually matches a given target image. While prior works primarily study ImageNav for ground robots, enabling this capability for autonomous drones is substantially more cha…

2026

SIGN: Safety-Aware Image-Goal Navigation for Autonomous Drones via Reinforcement Learning

RA-L 2026

Image-goal navigation (ImageNav) tasks a robot with autonomously exploring an unknown environment and reaching a location that visually matches a given target image. While prior works primarily study ImageNav for ground robots, enabling this capability for autonomous drones is substantially more cha

Cited by 1SourcecodeScholar
2025

FOSP: Fine-tuning Offline Safe Policy through World Models

ICLR 2025poster

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 safely. In this paper, we aim to improve safety during the d…

2024

Offline Goal-Conditioned Reinforcement Learning for Safety-Critical Tasks with Recovery Policy

ICRA 2024poster

Offline goal-conditioned reinforcement learning (GCRL) aims at solving goal-reaching tasks with sparse rewards from an offline dataset. While prior work has demonstrated various approaches for agents to learn near-optimal policies, these methods encounter limitations when dealing with diverse constr…

Cited by 6SourcecodeScholar
2022

Safety Correction from Baseline: Towards the Risk-aware Policy in Robotics via Dual-agent Reinforcement Learning

IROS 2022poster

Learning a risk-aware policy is essential but rather challenging in unstructured robotic tasks. Safe reinforcement learning methods open up new possibilities to tackle this problem. However, the conservative policy updates make it intractable to achieve sufficient exploration and desirable performan…

Cited by 4SourceScholar