Author

Zhen-Chen Liu

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#reinforcement learning Open access Oct 2026

Measurement-in-the-Loop Reinforcement Learning for Regional UAV Communication Enhancement

This paper investigates a measurement-driven rotary-wing unmanned aerial vehicle (UAV)-enabled wireless communication system serving multiple ground users. Unlike conventional studies relying on simplified theoretical channel models, we derive the air-to-ground (A2G) path loss and shadow-fading models from software-def...

Shu-Tong Wang, Zhen-Chen Liu, Fu-Yuan Ma et al. · Drones · 0 citations

Open access Sep 2026

Analysis and Optimization of Hanging Stability of Heavy-Duty Coaxial Unmanned Helicopter

This study examines the hovering and forward-flight stability of a heavy-lift coaxial unmanned helicopter with a suspended payload. A six-degree-of-freedom dynamics model is developed, coupling the rotor, fuselage, and a rigid-body sling via a universal joint, while neglecting rotor–payload aerodynamic interference for...

An-An Xu, Fang Wang, Chun-Mei Shangguan et al. · Applied Sciences · 0 citations