Results 41 to 50 of about 288 (134)

Analysis on controllability and stability of quad-tilt-rotor aircraft in helicopter mode

Xibei Gongye Daxue Xuebao, 2021
The controllability and stability of quad-tilt-rotor aircraft in helicopter mode are modeled and analyzed, which will provide a theoretical guidance for the subsequent control system design.

doaj   +1 more source

Development of Vertical Wind Turbine Blades Using 4D Printing of Composites

Polymer Composites, Volume 47, Issue 12, Page 10966-10975, 20 June 2026.
Vertical axis wind turbine: White blade: Commercial. Black blade: Composite. ABSTRACT This paper presents the procedure to make vertical wind turbine blades using the technique of 4D printing of composites (4DPC). The blades are made using carbon/epoxy composite materials with a fiber volume fraction of about 60%.
Emad Fakhimi, Suong Van Hoa
wiley   +1 more source

Analysis of 3D conversion corridor and establishment of transition path for tilting quadcopter aircraft

Hangkong gongcheng jinzhan
Designing a suitable rotor tilting path in the tilting transition corridor is one of the key steps in the flight dynamics analysis and flight control of tilt rotor aircraft.
ZHOU Xianqi, XU Jinfa
doaj   +1 more source

Research on a Drone‐Based Vacant Parking Detection System

IEEJ Transactions on Electrical and Electronic Engineering, Volume 21, Issue 6, Page 851-857, June 2026.
It can be difficult to know which spaces are available in parking lots and bicycle parking areas, so knowing the availability status is necessary for efficient parking. Therefore, in this study, we developed the drone that can display the availability status. Availability is determined by whether it can read a QR code attached to the ground. To conduct
Hiroki Mineshita, Syunsuke Wakamatsu, Hun‐ok Lim   +2 more
wiley   +1 more source

Lyapunov-Based Tracking Control of a Bi-Rotor [PDF]

Journal of Applied and Computational Mechanics
This paper discusses the modeling and trajectory tracking control of a Bi-rotor. A novel class of vertical flight robots that can perform vertical takeoff, landing, and passenger transportation.
Mohammad Ganji-Nahoji, Ali Keymasi-Khalaji   +1 more
doaj   +1 more source

Characteristics of unique cap, Tsurushi and Hata clouds around Mount Fuji

Weather, Volume 81, Issue 6, Page 182-190, June 2026.
Distinct clouds, such as cap clouds, Tsurushi (a type of lenticular cloud) and Hata (banner cloud‐like clouds), frequently form around Mount Fuji, an isolated peak with a slightly elliptical conical shape. Here, we examine their characteristics and occurrence patterns.
Hiroyuki Kusaka, Tomoko Kodama, Riho Ito, Tomoka Maeda, Natsuki Takada, Rio Ishikawa, Kakeru Konnai, Risa Asano, Miru Maebata, Ken T. Murata   +9 more
wiley   +1 more source

Initial Atmospheric Waves Experiment (AWE) Imaging Analyses: Gravity Wave Sources, Temperatures, Pseudomomentum Fluxes, and Horizontal Wavenumber Spectra at the OH Layer

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract The NASA Atmospheric Waves Experiment (AWE) employs an OH imager that began measurements aboard the International Space Station (ISS) on 22 November 2023. The motivation for AWE was to quantify gravity wave (GW) responses to diverse sources and their influences extending into the mesosphere and higher altitudes.
David C. Fritts, Robert G. Stockwell, Thomas S. Lund, P.‐Dominique Pautet, Kaoru Sato, Dai Koshin, Michael J. Taylor, Ludger Scherliess   +7 more
wiley   +1 more source

Controlling Dynamical Systems Into Unseen Target States Using Machine Learning

Advanced Intelligent Systems, Volume 8, Issue 5, May 2026.
Parameter‐aware next‐generation reservoir computing enables efficient, data‐driven control of dynamical systems across unseen target states and nonstationary transitions. The approach suppresses transient behavior while navigating system collapse scenarios with minimal training data—over an order of magnitude less than traditional methods.
Daniel Köglmayr, Alexander Haluszczynski, Christoph Räth   +2 more
wiley   +1 more source

Wildlife Responses to Drone Noise: A Preliminary Approach for Quantifying Disturbance During Single‐ and Dual‐Drone Flights

Ecology and Evolution, Volume 16, Issue 5, May 2026.
Single drone (a) and dual‐drone (a + b) setups used to assess behavioral responses to drone noise exposure. ABSTRACT Drones are increasingly being deployed to study wildlife; however, growing evidence indicates that drone noise can alter animal behavior and confound ecological data.
Saadia Afridi, Lucie Laporte‐Devylder, Guy Maalouf, Samuel G. Penny, Magnus Wahlberg, Blair R. Costelloe, Ulrik Pagh Schultz Lundquist   +6 more
wiley   +1 more source

Frontiers of Doppler Lidar: A Review on Its Global Applications

Meteorological Applications, Volume 33, Issue 3, May/June 2026.
Doppler lidars provide high‐resolution wind measurements that support weather forecasting, wind energy optimization, and aviation safety. This review highlights their global applications, operational advantages, and growing role in atmospheric science and sustainable development. ABSTRACT Doppler lidar is a powerful remote sensing technology capable of
Sridhara Nayak, Isao Kanda
wiley   +1 more source