Results 51 to 60 of about 288 (134)

Design and implementation of a spliced tilting dual rotor and its LADRC flight control

Hangkong gongcheng jinzhan
The configuration characteristics of multi rotor unmanned aerial vehicles determine that they are difficult to adapt to complex flight missions. To meet different mission requirements，combining and assembling specific configuration aircraft should be a ...
LIU Kun, XU Jinfa
doaj   +1 more source

Superior Abrasibility of YSZ(ESP)/BN@ZrO2‐Polyester Composite Sealing Coating Reinforcing With Hybrid Micron/Nanometer Multiscaled Pore Structure

Rare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu, Shuqi Wang, Yaming Wang, Jiao Han, Zhiyun Ye, Kai Lv, Yongchun Zou, Guoliang Chen, Jiahu Ouyang   +8 more
wiley   +1 more source

Subterranean Mine Inspection Using the Prometheus Re‐Configurable Drone

Journal of Field Robotics, Volume 43, Issue 3, Page 1646-1660, May 2026.
ABSTRACT This paper describes the design, development, and real‐world testing of an autonomous drone for subterranean exploration, known as “Prometheus.” Driven by requirements from industry that the drone be able to be deployed through areas of restricted access, Prometheus was designed to be directly deployed through a 150 mm aperture.
Liam Brown, Robert Clarke, Ali Akbari, Ferdian Jovan, Jameel Marafie, Ognjen Marjanovic, Sara Bernardini, Tom Richardson, Simon Watson   +8 more
wiley   +1 more source

Impact locations and damage to civil and military rotary-wing aircraft from wildlife strikes

Human-Wildlife Interactions, 2017
Rotary-wing aircraft (e.g., helicopters and tilt-wing aircraft) are an important component of all U.S. military services and the U.S. civil aviation industry.
Brian E. Washburn, Paul J. Cisar, Travis L. DeVault   +2 more
doaj   +1 more source

An Explicit, Compact, and Rotation‐Agnostic Formulation for Equivalent Nodal Loads for Point‐Loaded Beams

International Journal for Numerical Methods in Engineering, Volume 127, Issue 7, 15 April 2026.
ABSTRACT In time‐marching dynamical simulations, treatment of contact forces in deformable bodies represented by finite element meshes requires a compromise between simulation fidelity and computational costs. External forces directly evaluated at the mesh nodes offer better computational performance at the cost of modelling fidelity.
Alexander R. Schock, Mark Reckzin, Robert G. Langlois   +2 more
wiley   +1 more source

Hierarchical gain scheduling based tilt angle guided robust control during mode transition for tilt-rotor unmanned aircraft vehicle

International Journal of Advanced Robotic Systems
Tilt-rotor unmanned aircraft vehicle has the potential to combine vertical take-off and landing capability with efficient, high-speed cruise flight. However, the mode transition process is risky owing to the internal continuous time change of aerodynamic
Hongyu Nie, Feng Gu, Yuqing He
doaj   +1 more source

Analysis of the influence of transition state control strategy on structural load of quad-tiltrotor

Hangkong gongcheng jinzhan
There are complex structural load changes in the rotor during the tilt-transition of quad-tiltrotor aircraft,which can directly affect the life of the rotor.
HE Yongtao, ZHANG Xiayang, WANG Xin, ZHENG Lixiong   +3 more
doaj   +1 more source

Active Disturbance Rejection Flight Control and Simulation of Unmanned Quad Tilt Rotor eVTOL Based on Adaptive Neural Network

Drones
The unmanned quad tilt-rotor eVTOL (QTRV) is a variable-configuration aircraft that combines the features of vertical takeoff and landing (VTOL), hovering, and high-speed cruising, making its control system design particularly challenging.
Bohai Deng, Jinfa Xu, Xingyu Yuan, Shengxin Yu   +3 more
doaj   +1 more source

Real-Time TECS Gain Tuning Using Steepest Descent Method for Post-Transition Stability in Unmanned Tilt-Rotor eVTOLs

Drones
Unmanned tilt-rotor electric Vertical Take-Off and Landing (eVTOL) aircraft face significant control challenges during the transition from hover to forward flight, particularly when using open-source autopilot systems that rely on open-loop tilt control ...
Choonghyun Lee, Ngoc Phi Nguyen, Sangjun Bae, Sung Kyung Hong   +3 more
doaj   +1 more source

Research on Unsteady Aerodynamic Interference for the Tiltrotor Aircraft in Hover

Hangkong gongcheng jinzhan, 2019
The high resolution numerical simulation for rotor/wing-body interaction flow-field in hover is crucial for the accurate prediction of aerodynamic performance of the tilt-rotor aircraft, and is the one of the important issues of helicopter aerodynamics ...
Sun Kaijun, Zhang Bihui, Fu Yiwei, Zhang Lian   +3 more
doaj   +1 more source