Results 81 to 90 of about 5,959 (263)

CFD analysis of aerodynamic correlation mechanism in ski jumping takeoff-flight

Kongqi donglixue xuebao
While previous studies have extensively examined how takeoff and flight techniques affect performance (e.g., jump distance) from a kinematic perspective, few have focused on aerodynamic dynamics, nor the intrinsic relationship between these two phases ...
Jinglun Yu, Jinglun Yu, Jin Yang, Shuo Qi, Shengnian Zhang, Yantao Lou   +5 more
doaj   +1 more source

Intelligent Sky Guardians (InSkyGuard): An Aerial Robotic Swarm for Autonomous Detection and Entrapment of Rogue Multirotors

Advanced Robotics Research, EarlyView.
Intelligent Sky Guardians (InSkyGuard) is introduced as a four‐drone swarm that autonomously detects, tracks, and safely captures rogue drones using a coordinated net system. Computer vision and leader–follower control architecture enable synchronized enclosure, while integrated failsafes enhance system reliability. Validated through closed‐environment
Joshua Hastings, Levanya Dewanarayana, Iline Shaju, Haider Al‐Wizni, Sampson Marquis, Weicheng Huang, Pooya Sareh   +6 more
wiley   +1 more source

3D Printing of Self‐Healing Polymers by Material Extrusion: A Process‐Centric Review of Setups, Parameters, and Applications

Advanced Robotics Research, EarlyView.
This review highlights recent advances in material extrusion 3D printing of self‐healing polymers, focusing on the interplay between material chemistry, rheology, hardware customization, and process optimization. Filament‐ and ink‐based extrusion strategies, multimaterial architectures, and postprocessing approaches are discussed for applications in ...
Antonio Pavone, Gianni Stano, Gianluca Percoco   +2 more
wiley   +1 more source

A fast algorithm for predicating aerodynamic drag of EMUs based on GINO and FNO

机车电传动
Aerodynamic drag is a core indicator in the shape design of electric multiple units (EMU). Conventional methods for obtaining EMU aerodynamic drag, such as simulation calculations, model experiments, and on-track tests, are time-consuming and costly ...
YAO Shuanbao, CHEN Dawei, SHI Yongda, LIU Jiali, DING Sansan   +4 more
doaj  

Intelligent Micro/Nanorobots for Targeted Interventional Therapy: From Bench to Clinic

Advanced Robotics Research, EarlyView.
Zirui Zhang et al. reviewed the application and challenges of mobile nanomachines in interventional therapy. By converting exogenous energy, including chemical, magnetic, optical, and ultrasonic sources, into mechanical forces, micro/nanorobots (MNRs) enable precise actuation at unprecedented scales. Evolving far beyond traditional drug delivery, these
Zirui Zhang, Yu Dong, Yongsheng Du, Rui Gao, Lin Zhang, Fei Tong   +5 more
wiley   +1 more source

Autonomous Navigation of Pollen‐Inspired Magnetic Microrobots for Biomedical Applications

Advanced Robotics Research, EarlyView.
A sunflower pollen‐inspired magnetic microrobot enables controlled rolling navigation in vessel‐like environments. Its open geometry reduces hydrodynamic drag, while vision‐based closed‐loop control, shortest‐path planning, and reinforcement learning support target‐reaching and maze navigation with microrobot‐scale accuracy, highlighting a route toward
Ali Anil Demircali, Abdurrahim Yilmaz, Meysam Keshavarz, Jinshi Zhao, Ara Darzi, Eric Yeatman, Burak Temelkuran   +6 more
wiley   +1 more source

Commercial aircraft performance improvement using winglets [PDF]

FME Transactions, 2015
Aerodynamic drag force breakdown of a typical transport aircraft shows that lift-induced drag can amount to as much as 40% of total drag at cruise conditions and 80-90% of the total drag in take-off configuration. One way of reducing lift-induced drag is
Gavrilović Nikola N., Rašuo Boško P., Dulikravich George S., Parezanović Vladimir B.   +3 more
doaj  

Aerodynamic Drag and Gyroscopic Stability

, 2013
This paper describes the effects on aerodynamic drag of rifle bullets as the gyroscopic stability is lowered from 1.3 to 1.0. It is well known that a bullet can tumble for stability less than 1.0. The Sierra Loading Manuals (4th and 5th Editions) have previously reported that ballistic coefficient decreases significantly as gyroscopic stability, Sg, is
Courtney, Elya R., Courtney, Michael W.
openaire   +2 more sources

Human‐Scale Rotating Magnetic Field Delivery With Permanent Magnets Under Anatomic and Robotic Constraints

Advanced Robotics Research, EarlyView.
Rotating magnetic fields (RMFs) are widely used for microrobot propulsion and control. We show that RMF generation with permanent magnets is mechanically feasible for many limb and intracranial applications but becomes constrained for thoracic targets.
Tuan‐Anh Le, Husnu Halid Alabay, Anika Sivarasa, Gia‐Minh Hoang, Hakan Ceylan   +4 more
wiley   +1 more source

Aerodynamic interference of wing on helicopter rotor during aerial refueling

Kongqi donglixue xuebao
To enhance the safety of helicopter air-to-air refueling, a free-wake model incorporating rotor-wing aerodynamic coupling effects was developed for the specific operational conditions of this scenario.
Kehao Yuan, Dong Han, Yuhang Zhang
doaj   +1 more source