Results 41 to 50 of about 123,203 (295)

From Text to Safety: A Novel Framework for Mining Unsafe Aviation Events Using Advanced Neural Network and Feature Network

Aerospace
The rapid growth of the aviation industry highlights the need for strong safety management. Analyzing data on unsafe aviation events is crucial for preventing risks.
Qiang Wang, Ruicong Xia, Jiayang Yu, Qiuhan Liu, Sirong Tong, Ziling Xu   +5 more
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Uncertain Team Orienteering Problem With Time Windows Based on Uncertainty Theory

IEEE Access, 2019
Uncertainty theory is a branch of mathematics for modeling indeterminacy, especially belief degrees. This paper considers an application of uncertainty theory in team orienteering problem with time windows.
Jian Wang, Jiansheng Guo, Jicheng Chen, Shan Tian, Taoyong Gu   +4 more
doaj   +1 more source

Research and Evaluation Method for Echelon Usage of Double-Life Equipment Considering Calendar Life

Applied Sciences, 2023
Echelon usage is an important usage and control method for double-life equipment considering calendar life, which can improve the utilization rate of equipment life and give full play to the economic benefits of the equipment. However, the life indicator
Pisheng Qin, Xiaofeng Zhang, Qinglin Miao, Nachuan Liu   +3 more
doaj   +1 more source

Feline‐Inspired Robot Enabled by Combustion‐Driven Actuators for Agile Motion and High‐Payload Obstacle Traversal

Advanced Science, EarlyView.
Inspired by nature's competitive maneuvers, this study introduces a combustion‐driven soft actuator that powers a multi‐modal “Jump‐and‐Fly Catbot” (JFC). With millisecond response, high‐force output (over 70 times its weight) and precise control (error within 5%), the robot can jump, fly, hover, and escape from challenging environments, achieving ...
Hongkuan Ma, Yang Yang, Zhiguo He, Hongliang Ren, Pengcheng Jiao   +4 more
wiley   +1 more source

Drone Detection and Pose Estimation Using Relational Graph Networks

Sensors, 2019
With the upsurge in use of Unmanned Aerial Vehicles (UAVs), drone detection and pose estimation by using optical sensors becomes an important research subject in cooperative flight and low-altitude security.
Ren Jin, Jiaqi Jiang, Yuhua Qi, Defu Lin, Tao Song   +4 more
doaj   +1 more source

Bioinspired Adaptive Leg‐Claw Enables Robust Perching and Grasping for UAVs

Advanced Science, EarlyView.
Inspired by owl limb morphology and bat roosting behavior, this study presents a bioinspired adaptive leg‐claw mechanism that enables UAVs to perform robust and versatile perching and grasping. The design integrates a four‐link tibial structure, tension‐driven deformable feet, and active control, enabling stable perching on various branches and ...
Tianyu Cheng, Shaokun Wang, Jiehan Zou, Guiwen Shi, Zhongxue Gan, I‐Ming Chen, Guo‐Niu Zhu   +6 more
wiley   +1 more source

Improvement on Ground Taxiing Rectification Control of a Certain UAV

Hangkong gongcheng jinzhan, 2021
Ground taxiing is an important stage in the flight process of wheeled UAV, the dynamic characteristics of ground taxiing is of great significance for finding out the anti-crosswind characteristics and optimizing the rectification control.Based on the ...
SHI Hongwei, CAI Yongheng, LI Xinhua
doaj   +1 more source

Liquid Metals in Radio Frequency Applications: A Review of Physics, Manufacturing, and Emerging Technologies

Advanced Electronic Materials, EarlyView.
This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley   +1 more source

Aerodynamic Optimization Design of the Rotor Blade of a Tilt-rotor Aircraft

Hangkong gongcheng jinzhan, 2019
The aerodynamic design of tilt-rotor needs to synthetically consider the different requirements in helicopter mode and fixed-wing aircraft mode. The multi-objective genetic algorithm based on Kriging surrogate model is used to establish an optimization ...
Sun Kaijun, Zhang Lian, Fu Yiwei, Yu Yueyang   +3 more
doaj   +1 more source