Bat Bot 2.0: bio-inspired anisotropic skin, passive wrist joints, and redesigned flapping mechanism

2021 ◽  
Author(s):  
Jonathan Hoff ◽  
Nicole Jeon ◽  
Patrick Li ◽  
Joohyung Kim
Keyword(s):  
Flapping Mechanism ◽  
Wrist Joints

Correction of Dorsi-Flexed Intercalated Segment Instability after Restoration of Scaphoid Height in a Cadaver Model of Scaphoid Non-Union

1995 ◽  
Vol 20 (5) ◽  
pp. 596-602 ◽  
Author(s):  
M. YASUDA ◽  
M. KUSUNOKI ◽  
K. KAZUKI ◽  
Y. YAMANO
Keyword(s):  
Mechanical Loading ◽  
Bone Defect ◽  
Carpal Instability ◽  
Rigid Fixation ◽  
Anatomical Reduction ◽  
Non Union ◽  
Herbert Screw ◽  
Palmar Approach ◽  
Wrist Joints

Models of scaphoid non-union with static dorsi-flexed intercalated segment instability were produced in five frozen arms from cadavers or subjects following accidents by repetitive mechanical loading of the wrist joints longitudinally after a bone defect has been made at the mid-portion of the scaphoid. We designed four models of reduction: anatomical reduction; reduction with a shortened scaphoid; anatomical reduction but with the radio-lunate ligament sectioned, and a shortened scaphoid with the radio-lunate ligament sectioned. Results suggested that anatomical reduction with rigid fixation with a Herbert screw was most effective for correction of malalignment with DISI. Preservation of the radio-lunate ligament during the palmar approach to the scaphoid seemed to be important to prevent ligamentous carpal instability.

scholarly journals Dove: A biomimetic flapping-wing micro air vehicle

2017 ◽  
Vol 10 (1) ◽  
pp. 70-84 ◽  
Author(s):  
Wenqing Yang ◽  
Liguang Wang ◽  
Bifeng Song
Keyword(s):  
Mechanism Design ◽  
Flapping Wing ◽  
Micro Air Vehicle ◽  
Flexible Wing ◽  
The Past ◽  
Ground Station ◽  
Air Vehicle ◽  
Research Goal ◽  
Color Video ◽  
Flapping Mechanism

This paper describes the design and development of the Dove, a flapping-wing micro air vehicle (FWMAV), which was developed in Northwestern Polytechnical University. FWMAVs have attracted international attentions since the past two decades. Since some achievements have been obtained, such as the capability of supporting an air vehicle to fly, our research goal was to design an FWMAV that has the ability to accomplish a task. Main investigations were presented in this paper, including the flexible wing design, the flapping mechanism design, and the on-board avionics development. The current Dove has a mass of 220 g, a wingspan of 50 cm, and the ability of operating fully autonomously, flying lasts half an hour, and transmitting live stabilized color video to a ground station over 4 km away.

Design of a Foldable Flapping Mechanism

2013 ◽  
Vol 437 ◽  
pp. 366-372
Author(s):  
Xiao Zhou Fan ◽  
Zhi Lin Zhang ◽  
Liang Chen
Keyword(s):  
Lift Force ◽  
Virtual Prototype ◽  
Flapping Wing ◽  
Optimal Parameters ◽  
Cam Mechanism ◽  
Set Up ◽  
3D Software ◽  
Flapping Mechanism

Folding motion is important for a flight creature using flapping wing mode, but it seldom used for flapping-wing robot. In this paper, we propose a new foldable flapping wing mechanism, which consists of spatial crank-rocker mechanism, parallelogram mechanism, and cam mechanism. We establish the kinematical models, calculate the optimal parameters, and set up the virtual prototype using 3D software. The tracks of wingtip and the comparison between foldable and unfoldable flap wing show that folding motion can improve lift force obviously.

An Exoskeleton Based Robotic Device for Providing Rehabilitative Therapies to Human Forearm and Wrist Joints (UWM-FWRR)

2020 ◽  
Vol 101 (11) ◽  
pp. e56
Author(s):  
Tanvir Ahmed ◽  
Asif Al Zubayer Swapnil ◽  
Md Rasedul Islam ◽  
Inga Wang ◽  
Mohammad Rahman
Keyword(s):  
Robotic Device ◽  
Human Forearm ◽  
Wrist Joints
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