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Zhefan Xu

11 accepted papers

2026

VL-DPO: Vision-Language-Guided Finetuning for Preference-Aligned Autonomous Driving

ICRA 2026poster

The rapid growth of autonomous driving datasets has enabled the scaling of powerful motion forecasting models. While large-scale pretraining provides strong performance, the standard imitation objective may not fully capture the complex nuances of human driving preferences. Meanwhile, recent advance…

2025

Intent Prediction-Driven Model Predictive Control for UAV Planning and Navigation in Dynamic Environments

RA-L 2025

Aerial robots can enhance construction site productivity by autonomously handling inspection and mapping tasks. However, ensuring safe navigation near human workers remains challenging. While navigation in static environments has been well studied, navigating dynamic environments remains open due to

Cited by 16SourcecodeScholar
2024

Heuristic-based Incremental Probabilistic Roadmap for Efficient UAV Exploration in Dynamic Environments

ICRA 2024poster

Autonomous exploration in dynamic environments necessitates a planner that can proactively respond to changes and make efficient and safe decisions for robots. Although plenty of sampling-based works have shown success in exploring static environments, their inherent sampling randomness and limited…

Cited by 4SourcecodeScholar
2024

Onboard Dynamic-Object Detection and Tracking for Autonomous Robot Navigation With RGB-D Camera

RA-L 2024

Deploying autonomous robots in crowded indoor environments usually requires them to have accurate dynamic obstacle perception. Although plenty of previous works in the autonomous driving field have investigated the 3D object detection problem, the usage of dense point clouds from a heavy Light Detec

Cited by 58SourcecodeScholar
2024

Quadcopter Trajectory Time Minimization and Robust Collision Avoidance via Optimal Time Allocation

ICRA 2024poster

Autonomous navigation requires robots to generate trajectories for collision avoidance efficiently. Although plenty of previous works have proven successful in generating smooth and spatially collision-free trajectories, their solutions often suffer from suboptimal time efficiency and potential un-s…

Cited by 0SourcecodeScholar
2023

A Vision-Based Autonomous UAV Inspection Framework for Unknown Tunnel Construction Sites With Dynamic Obstacles

RA-L 2023

Tunnel construction using the drill-and-blast method requires the 3D measurement of the excavation front to evaluate underbreak locations. Considering the inspection and measurement task's safety, cost, and efficiency, deploying lightweight autonomous robots, such as unmanned aerial vehicles (UAV),

Cited by 27SourcecodeScholar
2023

A real-time dynamic obstacle tracking and mapping system for UAV navigation and collision avoidance with an RGB-D camera

ICRA 2023poster

The real-time dynamic environment perception has become vital for autonomous robots in crowded spaces. Although the popular voxel-based mapping methods can efficiently represent 3D obstacles with arbitrarily complex shapes, they can hardly distinguish between static and dynamic obstacles, leading to…

Cited by 32SourcecodeScholar
2023

Vision-aided UAV Navigation and Dynamic Obstacle Avoidance using Gradient-based B-spline Trajectory Optimization

ICRA 2023poster

Navigating dynamic environments requires the robot to generate collision-free trajectories and actively avoid moving obstacles. Most previous works designed path planning algorithms based on one single map representation, such as the geometric, occupancy, or ESDF map. Although they have shown succes…

Cited by 28SourcecodeScholar
2022

DPMPC-Planner: A real-time UAV trajectory planning framework for complex static environments with dynamic obstacles

ICRA 2022poster

Safe UAV navigation is challenging due to the complex environment structures, dynamic obstacles, and uncertainties from measurement noises and unpredictable moving obstacle behaviors. Although plenty of recent works achieve safe navigation in complex static environments with sophisticated mapping al…

Cited by 49SourceScholar
2021

Autonomous UAV Exploration of Dynamic Environments Via Incremental Sampling and Probabilistic Roadmap

RA-L 2021

Autonomous exploration requires robots to generate informative trajectories iteratively. Although sampling-based methods are highly efficient in unmanned aerial vehicle exploration, many of these methods do not effectively utilize the sampled information from the previous planning iterations, leadin

Cited by 135SourcecodeScholar