UAV Winch Delivery and Docking for Precise Landing and Charging

The patent applies dynamics by transitioning from constant velocity lowering to variable velocity control. The winch mechanism adjusts the lowering speed dynamically - higher velocity during the majority of the descent for efficiency, then reduces to near-zero velocity as the package approaches the ground to prevent impact damage. This dynamic speed adjustment resolves the contradiction between delivery speed and package safety.

The patent implements self-service through the nest structure that provides passive guidance and correction. The tapered walls of the nest automatically guide the UAV toward the center position during landing, reducing the burden on the active control system. The UAV's onboard systems (sensors, processors) work autonomously to detect position and make corrections, while the nest's physical geometry provides inherent stability and centering, thereby achieving high landing precision without excessively complex control algorithms.

The patent merges the functions of battery charging with the docking/landing operation. Instead of separate removal and charging steps, the battery charging contacts are integrated into the nest structure itself. When the UAV lands in the nest, electrical contacts between the UAV and nest establish charging connection automatically, combining the landing and charging initiation into a single integrated action, thus avoiding power loss and reboot delays.

The system employs self-service by making the charging connection automatic through the docking process. The electrical contacts are positioned such that simply landing the UAV in the nest automatically establishes the charging connection without requiring the operator to manually attach cords or perform additional steps. This eliminates both the time loss and material wear associated with repeated manual connector operations.