Results 51 to 60 of about 731,443 (292)

Numerical Modeling of Photothermal Self‐Excited Composite Oscillators

open access: yesAdvanced Robotics Research, EarlyView.
We present a numerical framework for simulating photothermal self‐excited oscillations. The driving mechanism is elucidated by highlighting the roles of inertia and overshoot, as well as the phase lag between the thermal moment and the oscillation angle, which together construct the feedback loop between the system state and the environmental stimulus.
Zixiao Liu   +6 more
wiley   +1 more source

EXPERIMENTAL STUDY OF THE FRICTION FACTOR IN EQUILATERAL TRIANGULAR DUCT WITH DIFFERENT TYPES OF VOREX GENERATORS (OBSTACLES)

open access: yesAl-Qadisiyah Journal for Engineering Science, 2010
. Friction factors for fully developed flow in an equilateral triangular duct containing built-in vortex generators of delta wing, rectangular wing, pair of delta winglets, and pair of rectangular winglets have been investigated experimentally for ...
Mohammed Ghanem Jehad
doaj  

Task‐Oriented Path Planning Towards Autonomous Sensor Network Deployment in Rainforest Canopies

open access: yesAdvanced Robotics Research, EarlyView.
An informative path planner for drone‐based deployment of wireless sensor networks in rainforest canopies is presented, addressing key challenges in large‐scale biodiversity monitoring. By integrating canopy surface detection with connectivity‐aware sampling under strict flight constraints, the approach enables efficient and reliable aerial sensor ...
Rita Santos Raminhos, Salua Hamaza
wiley   +1 more source

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

open access: yesAdvanced 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   +6 more
wiley   +1 more source

Impact of a Reverse Delta Type Add-on Device on the Flap-tip Vortex of a Wing

open access: yesInternational Journal of Aviation, Aeronautics, and Aerospace, 2016
The effect of interactions of vortices produced by an outboard flap-tip of a half-span wing (NACA 23012 in landing configuration) and a slender reverse delta type add-on device, placed in the proximity of the outboard flap-tip, on the upper surface of ...
Afaq Altaf   +3 more
doaj   +1 more source

Stiffness‐Programmable Origami Robots With Tendon‐Driven Actuation via Multimaterial 3D Printing

open access: yesAdvanced Robotics Research, EarlyView.
Motion diversity is achieved in a tendon‐driven origami robot through programmable stiffness rather than modified actuation. Multimaterial 3D printing embeds soft creases, modular inserts redirect identical tendon inputs into distinct behaviors, and variable‐stiffness inserts enable real‐time switching.
Elisha Lerner, Jianguo Zhao
wiley   +1 more source

WorMa: An Undulatory Robot With Center of Mass Regulation via Internal Fluid Redistribution for Amphibious Locomotion

open access: yesAdvanced Robotics Research, EarlyView.
WorMa is an amphibious undulatory robot that uses Center of Mass redistribution as the sole terrain adaptation mechanism. This mechanism is based on internal fluid mass redistribution through a pump‐driven latex balloon system that creates three profiles: head‐biased, balanced, and tail‐biased.
Daniil Filimonov, Nana Obayashi
wiley   +1 more source

Applying colour-coded particle image velocimetry to the wake of a delta wing across a wide range of angles of attack

open access: yesJournal of Fluid Science and Technology
The forces acting on a delta wing are predominantly influenced by local flow structures, specifically leading-edge vortices (LEVs). This study applies colour-coded particle image velocimetry (PIV) to quantify wake dynamics and lift generation for a delta
Shūji ŌTOMO   +4 more
doaj   +1 more source

Model Reference Adaptive Control for Wing-Rock Suppression in Delta-Wing Aircraft [PDF]

open access: yesE3S Web of Conferences
Wing rock, a self-excited rolling oscillation occurring at high angles of attack, significantly affects flight stability and maneuverability in highly swept configurations.
Narayanan Kamala   +2 more
doaj   +1 more source

Delta Jr. High students

open access: yes, 1966
Jr. High class. Teachers RaNae Christensen and Lenore McCall in front of class, Delta Jr.

core  

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