Results 61 to 70 of about 4,462 (291)
On the Handling Qualities of Two Flying Wing Aircraft Configurations
Aerospace, 2021 The coupling of the longitudinal and lateral stability modes of an aeroplane is considered in two cases: (i) weak coupling, when the changes in the frequency and damping of the phugoid, short period, dutch roll, and helical modes are small, i.e., the ...
Luís M. B. C. Campos +1 more
doaj +1 more source
Magnetic Droplet Manipulation on Open Surfaces
Advanced Materials Technologies, EarlyView.Recent advances in the manipulation of magnetic droplets demonstrate various manipulations on open surfaces, including transport, splitting, merging, and force‐controlled motion, enabled by magnetic particles and external fields. ABSTRACT Manipulation of liquids on a smaller scale enables applications in various fields, particularly diagnostics and ...
Robab Jahangir, Vahid Nasirimarekani
wiley +1 more source
On Aerodynamic Roll Damping [Elektronisk resurs] [PDF]
, 2015 In this paper an approach for estimating aerodynamic roll damping is formulated. The approach utilizes wind tunnel tests and the concept of effective levers to relate roll induced apparent wind to a damping moment. Evaluation of the approach on a typical
Ovegård, Erik, +2 more
core
Advanced Robotics Research, EarlyView.A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley +1 more source
Ship roll damping coefficient prediction using CFD [PDF]
, 2019 For a ship undergoing roll motion at a resonance frequency, the roll restoring moment and virtual moment of inertia counteract each other and only the damping moment resists the roll exciting moments.
Kianejad, SS (15682361) +4 more
core
Advances in Mechanical Engineering, 2017 This work concerns the usage of the internal stiffness and damping nonlinearity for vibration suppression in a van der Pol–type mechanical self-excitation system.
Ze-Qi Lu +3 more
doaj +1 more source
Direct lateral maneuvers in hawkmoths
Biology Open, 2016 We used videography to investigate direct lateral maneuvers, i.e. ‘sideslips’, of the hawkmoth Manduca sexta. M. sexta sideslip by rolling their entire body and wings to reorient their net force vector. During sideslip they increase net aerodynamic force
Jeremy S. M. Greeter, Tyson L. Hedrick
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 +5 more
wiley +1 more source
Numerical study of scale effects of viscous roll damping for a container ship
BrodogradnjaIn this paper, the scale effects on a container ship’s roll motion are investigated by numerical approach. The accuracy of the numerical method is verified by comparing numerical results with experimental data through a grid sensitivity study.
Nguyen Thi Ha Phuong +2 more
doaj +1 more source
Strong‐Magnetic Flexible Composites for Magnetically Responsive Soft Robots
Advanced Robotics Research, EarlyView.This perspective provides an overview of the performance mechanisms, preparation methods, and applications of strong magnetic flexible composite materials in soft actuators (such as gripping, movement, and sensing), and further explores current opportunities and challenges.
Wenwen Li +4 more
wiley +1 more source