๐ค AI Summary
Landing multirotor drones on inclined unmanned surface vessels under wave-induced disturbances is challenged by stringent attitude tolerances, strong wind perturbations, and limited landing zones, resulting in low success rates. This work proposes a lightweight, switchable adhesion mechanism that achieves reliable attachment through motor-driven helical hooks actively engaging with hook-and-loop fasteners, while enabling controlled release during takeoff. The design is structurally simple, lightweight, and uniquely combines active adhesion with on-demand detachment. Integrated with a basic vertical PID controller, experimental validation on a custom-tilted platform demonstrates a significant improvement in landing success rateโfrom a baseline average of 40% to 80%โeven at inclinations as high as 43ยฐ, substantially enhancing system robustness.
๐ Abstract
Autonomous multirotor landings on uncrewed surface vessels (USVs) are critical for persistent maritime operations but remain challenging due to wave-induced tilt, wind disturbances, and limited landing area. Many existing approaches exhibit small pose tolerance for reliable landing. This paper presents a lightweight toggleable adhesion mechanism to improve landing reliability. The system uses a motor-driven corkscrew that engages hook-and-loop material on the landing surface, enabling active adhesion during landing and controlled release during takeoff. We evaluate a prototype using a modified Crazyflie 2.0 and a custom tilting platform at fixed angles representative of extreme wave conditions. Using only a simple vertical PID controller, the proposed approach increases landing success from an average of 40% (baseline) to 80% across platform tilts up to 43 degrees using appropriately selected actuation settings.