Results 41 to 50 of about 7,657 (227)

Active Fluid Gurney Flaps, Controllable Lift Enhancement Toward Wind Turbine Power Production Regulation

Wind Energy, Volume 29, Issue 1, January 2026.
ABSTRACT Meeting the rising demand for renewable energy requires innovative solutions to enhance wind power extraction, particularly given demographic and geographic constraints on wind farm deployment. Active high‐lift devices, such as the Active Fluid Gurney Flap (AFGF), offer a promising approach that can dynamically modify aerodynamic performance ...
Mario Lucas, Jorge Saavedra
wiley   +1 more source

Obstacle‐Aware Navigation for MAVs Using Constant Flow Divergence Control and Texton‐Based Visual Cues

Journal of Robotics, Volume 2026, Issue 1, 2026.
Tiny flying insects rely heavily on optical flow for landings and navigation. By maintaining a constant optical flow divergence, they can approach targets or obstacles with an exponential decay of both relative distance and velocity. Previous studies have shown that Micro Air Vehicles (MAVs) leverage this control strategy for efficient landings and ...
Xu Shi, Hann Woei Ho, Weijie Kuang, Bingxiao Ding   +3 more
wiley   +1 more source

Multifunctional Magnetic Soft Actuators for Aerospace Applications: Morphing Structures and Biomimetics

Advanced Materials Technologies, Volume 10, Issue 24, December 17, 2025.
This paper investigates magnetic soft actuators for aerospace use. Various actuators with different magnetic particle fractions are created and tested to enhance their multifunctional performance, specifically displacement ability and mechanical strength, which significantly improved their mechanical strength by incorporating natural and synthetic ...
Diogo Santos, Paulo Torrão Fiadeiro, Abílio Pereira Silva, João Nunes‐Pereira   +3 more
wiley   +1 more source

Tropospheric Propagation Effects Extracted From ADS‐B Messages

Engineering Reports, Volume 7, Issue 12, December 2025.
This study explores the use of ADS‐B messages to estimate tropospheric effects, effectively isolating atmospheric influences from interference. The approach enables independent lower atmosphere studies and offers a cost‐free supplementary method for satellite applications, benefiting GNSS systems, especially at low elevation angles where multipath and ...
Alina‐Mihaela Badescu
wiley   +1 more source

Online Deterministic 3D Trajectory Generation for Electric Vertical Take-Off and Landing Aircraft

Aerospace
The use of non-piloted eVTOL aircraft in non-segregated airspace requires reliable and deterministic automatic flight guidance systems for the aircraft to remain predictable to all the users of the airspace and maintain a high level of safety.
Zoe Mbikayi, Agnes Steinert, Dominik Heimsch, Moritz Speckmaier, Philippe Rudolph, Hugh Liu, Florian Holzapfel   +6 more
doaj   +1 more source

Urban air mobility and flying cars: Overview, examples, prospects, drawbacks, and solutions

Open Engineering, 2022
Transportation in cities may undergo substantial changes due to two emerging technologies that enable three-dimensional movement of people or cargo. These emerging technologies are urban air mobility (UAM) and flying cars.
Marzouk Osama A.
doaj   +1 more source

Spiral Approach for Non‐Software Product and Engineering System Development

Systems Engineering, Volume 28, Issue 6, Page 779-802, November 2025.
ABSTRACT This article explored the spiral development process, sometimes called “evolutionary acquisition” in military sectors, and reviewed major non‐software applications in the engineering literature. The spiral development process was originally developed for the design of software while minimizing and managing risk, but the principles can be ...
Isha Amod Gujarathi, William R. Norris, Albert E. Patterson   +2 more
wiley   +1 more source

Development of the United States GReenhouse Gas and Air Pollutants Emissions System (GRA2PES)

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 20, 28 October 2025.
Abstract In the U.S., emissions of greenhouse gases and air pollutants are often developed independently. Here, we describe the GReenhouse gas And Air Pollutants Emissions System (GRA2PES), which provides gridded emissions of fossil‐fuel carbon dioxide (ffCO2) and 93 air quality (AQ) species for 17 combustion and non‐combustion sectors at 4 km × 4 km ...
Congmeng Lyu, Colin Harkins, Meng Li, Kimberly Mueller, Jack Prothero, Bert Verreyken, John B. Miller, Scott J. Lehman, Jeff Peischl, Jessica B. Gilman, Carsten Warneke, Matthew M. Coggon, Chelsea E. Stockwell, Steven S. Brown, Kristen Zuraski, Aaron Lamplugh, Kevin R. Gurney, Lech Gawuc, Pawlok Dass, Rachel M. Hoesly, Steven J. Smith, Tomohiro Oda, Lucy R. Hutyra, Conor K. Gately, Claire Granier, James R. Whetstone, Brian C. McDonald   +26 more
wiley   +1 more source

Improving Wind Speed Forecasting for Urban Air Mobility Using Coupled Simulations

Advances in Meteorology, 2022
Hazardous weather, turbulence, wind, and thermals pose a ubiquitous challenge to Unmanned Aircraft Systems (UAS) and electric-Vertical Take-Off and Landing (e-VTOL) aircrafts, and the safe integration of UAS into urban area requires accurate high ...
Mounir Chrit, Marwa Majdi
doaj   +1 more source

Enhancing Damage Tolerance of Structures Using 3D/4D Printing Technologies

Advanced Materials Technologies, Volume 10, Issue 20, October 20, 2025.
This review highlights recent advances in damage tolerance for structural design, emphasizing safety, durability, and reliability in fields like aerospace and civil engineering. It covers innovations in materials, 3D/4D printing, predictive design methods, and nature‐inspired strategies.
Morteza Sayah Irani, Sadegh Ranjbar, Mohammad Lakhi, Ali Zolfagharian   +3 more
wiley   +1 more source