Results 11 to 20 of about 3,315 (185)

A wind tunnel investigation of the unsteady aerodynamic characteristics of bionic flapping wings with three-dimensional complex motion

open access: yesAIP Advances, 2023
The bionic flapping wing aircraft realizes flight by imitating the structure and flapping mode of birds. In this paper, a three-dimensional composite motion aerodynamic analysis model of a bionic flapping wing is established.
Lun Li, Wencheng Wang, Xiaojin Wu
doaj   +1 more source

Research and Test of X-wing Flapping-wing Mechanism Based on the Crank Slider Mechanism

open access: yesJixie chuandong, 2023
A X-wing flapping-wing mechanism with wings flapping symmetrically is designed. The crank slider mechanism is adopted to convert the circular motion of the crank into the linear reciprocating motion of the straight shaft, and the straight shaft drives ...
Huang Xiansheng, Cai Yu, Li Qi, Liu Bin
doaj  

Flying State Sensing and Estimation Method of Large-Scale Bionic Flapping Wing Flying Robot

open access: yesActuators, 2022
A large bionic flapping wing robot has unique advantages in flight efficiency. However, the fluctuation of fuselage centroid during flight makes it difficult for traditional state sensing and estimation methods to provide stable and accurate data.
Guangze Liu, Song Wang, Wenfu Xu
doaj   +1 more source

Design and Coupling Dynamics Research of a Single-drive Multi-mode Flapping-wing Aircraft

open access: yesJixie chuandong, 2023
Aiming at the problems of single flapping wing movement mode and low flight flexibility and stability of flapping-wing aircraft, a single-drive multi-mode flapping-wing aircraft based on the space linkage mechanism is designed. The kinematic model of the
Jiang Houqing, Hou Yu, Guo Yongxing
doaj  

Comparison of Power Requirements: Flapping vs. Fixed Wing Vehicles

open access: yesAerospace, 2016
The power required by flapping and fixed wing vehicles in level flight is determined and compared. Based on a new modelling approach, the effects of flapping on the induced drag in flapping wing vehicles are mathematically described.
Gottfried Sachs
doaj   +1 more source

Design and Verification of a Large-Scaled Flapping-Wing Aircraft Named “Cloud Owl”

open access: yesApplied Sciences, 2023
The bionic flapping-wing aircraft has the advantages of high flexibility and strong concealment; however, in the existing flapping-wing aircraft, the platform performance is influenced by the payload capacity, endurance, and durability; additionally, the
Rui Meng   +3 more
doaj   +1 more source

Calculation Methods of Flight Performance of Flapping Wing Aircrafts Based on Energy Theory and Slipstream Theory (September 2018)

open access: yesIEEE Access, 2018
Flight performance calculation is an important part of the micro flapping wing air vehicle design. It is used to verify whether the air vehicle design meets the performance requirements so as to make targeted improvements to the design.
Jianlin Xuan, Z. Yang, P. Nian, D. Ma
doaj   +1 more source

Research progress on the wind tunnel experiment of a bionic flapping-wing aerial vehicle

open access: yes工程科学学报, 2022
“Flapping wing” is a mechanism observed in the flight of birds, insects, and bats. The lift and thrust for a flight are generated by the active movement of wings. It was first specifically designed by Da Vinci.
Qiang FU   +4 more
doaj   +1 more source

Design of Variable Amplitude Flapping Wing Aircraft and Realization of Multiple Flight Modes

open access: yesJixie chuandong, 2021
Aiming at the problems of the single flight mode and inflexible flight attitude,a variable amplitude flapping wing aircraft is designed. By adjusting the flapping amplitude, the flapping wing motion attitude and flight mode can be switched.
Yueyang Hou   +4 more
doaj  

Effects of deformation and vibration characteristics of wings on flapping flight

open access: yesMechanical Engineering Journal, 2015
The dragonfly wing is passively deformed under flapping and has the strength to withstand high flapping frequency simultaneously. These characteristics of deformation and vibration of the wing are important for flapping flight.
Hisayoshi NAKA, Hiromu HASHIMOTO
doaj   +1 more source

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