LeAffordNav: Enhancing Open-vocabulary Mobile Manipulation with LLM-guided Exploration and Affordance-aware Navigation

Open-vocabulary mobile manipulation is a fundamental task for robotic assistants. However, Inefficient exploration and hand-off errors between different skills pose significant challenges to completing mobile manipulation tasks. In this paper, we propose a novel method named LeAffordNav, which is composed of LLM-guided exploration and Affordance-aware Navigation to address these challenges. LLM-guided exploration introduces LLMs to combine commonsense inference and frontier-based exploration, and achieves the balance between exploration and finding the target object. Considering the manipulability of the robot arm and the accessibility of the robot, we propose Affordance-aware Navigation which predicts the affordance of the mobile manipulation to reduce the hand-off errors between navigation and manipulation. Experiments on the HomeRobot benchmark show that LeAffordNav achieves new state-of-the-art performance, with a 20% higher success rate than the previous best. The code is available at https: //github.com/Cyuanwen/LeAffordNav.