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Faculty Mentor

Dr. Sergey Drakunov

Abstract

Autonomous tracking of agile unmanned aerial vehicles (UAVs) presents significant challenges for real-time perception and control systems. This work presents AIRHOUND (Autonomous Intelligent Rotorcraft for Hostile Object Unified Navigation and Detection), a UAV platform implementing vision-based yaw tracking through a modular ROS2 software architecture. The system employs YOLOv8 object detection optimized with NVIDIA TensorRT for embedded deployment on an NVIDIA Jetson Orin companion computer. Detected targets are processed through a geometric tracking module that converts pixel coordinates to angular yaw errors using pinhole camera intrinsics, with a proportional controller generating rate-limited yaw commands. These commands are streamed to a PX4 flight controller via the Micro XRCE-DDS bridge for offboard control execution. The software architecture was validated through a 600-second end-to-end integration test in the PX4 Software-In-The-Loop (SITL) simulation environment. Results demonstrated sustained 30 Hz message throughput across all pipeline stages with zero dropped messages, exceeding the 15 Hz minimum requirement by a factor of two. The integration process identified and resolved seven software bugs prior to successful validation, demonstrating the value of simulation-based testing before hardware deployment. This work establishes a validated software foundation for autonomous UAV tracking, with the modular three-node architecture enabling independent development and testing of perception, tracking, and control components. Future work includes hardware validation with real YOLOv8 inference on the assembled platform, transition to transformer-based detection models (RF-DETR), and implementation of Kalman filtering for improved target dropout handling.

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