Aerodynamic analysis of insect-like flapping wings in fan-sweep and parallel motions with the slit effect

Zhu, Zenggang; Zhao, Jing‐Tai; He, Yanlin; Guo, Shijun; Chen, Si; Ji, Bing

doi:10.1016/j.birob.2022.100046

Cited by 5 publications

(3 citation statements)

References 36 publications

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“…These can also utilize CFD modeling, in which a system is defined in fluid dynamics software, and the system performance is extracted through simulation. This can be used to vary factors such as wing sizing [83], surface modifications [84][85][86], or moving the pivot point in folding wings [87][88][89]. It can also analyze changing kinematics [90,91], angles of attack [92], or other parameters [93,94].…”

Section: Mathematical Modeling/cfdmentioning

confidence: 99%

A Bibliometric Analysis of Flapping Wing Instrumentation

Lefik,

Marian,

Chahl

2023

Aerospace

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There are flapping wing-style systems being developed by various institutions around the world. However, despite there being many systems that superficially appear robust, there is no viable flapping wing flying system at this time. We identified a gap in knowledge and capability, which is that the lack of appropriate instrumentation seems to be a major roadblock in further developing flapping wing flying systems. There is no complete solution in regards to instrumentation and sensing at the appropriate scales. This paper seeks to critically examine and classify the existing instrumentation utilized and reported in the literature and attempts to identify the path forward for flapping wing-style instrumentation.

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Section: Mathematical Modeling/cfdmentioning

confidence: 99%

A Bibliometric Analysis of Flapping Wing Instrumentation

Lefik,

Marian,

Chahl

2023

Aerospace

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“…In this regard, the aero/hydrodynamics of birds and other creatures were intensively reviewed as potential inspirations for biomimetic flow control techniques [16][17][18][19], and the kinesiology of living creatures like fishes and butterflies and their possible impact on performance of life-inspired robots were studied [20,21]. Here, the remedies on lift enhancement [22,23], drag reduction [24][25][26], increasing lift-to-drag ratio [27,28], improving aerodynamic robustness [29], and modulation of aerodynamic forces and moments [30] are not discussed in detail. However, due to closer ties with the scope of the present work, in the following it is addressed to the bio-inspired aerodynamic control and adaptivity mechanisms focusing on their potential applications in wind energy harvesters.…”

Section: Introductionmentioning

confidence: 99%

Adaptivity of a leaf-inspired wind energy harvester with respect to wind speed and direction

Sabzpoushan,

Woias

2024

Bioinspir. Biomim.

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Environmental wind is a random phenomenon in both speed and direction, though it can be forecasted to some extent. An example of that is a gust which is an abrupt, but short-time change in wind speed and direction. Being a free and clean source for small-scale energy scavenging, attraction of wind is rapidly growing in the world of energy harvesters. In this paper, a leaf-like flapping wind energy harvester is introduced as the base structure in which a short-span airfoil is attached to the free end of a double-deck cantilever beam. A flap mechanism inspired by scales on sharks’ skin and a tail mechanism inspired by birds’ horizontal tail are proposed for integration to the base harvester to make it adaptive with respect to wind speed and direction, respectively. The use of the flap mechanism increases the leaf flapping frequency by +2.1 to +11.5 Hz at wind speeds of 1.5 m/s to 6.0 m/s. Therefore, since the output power of a vibrational harvester is a function of vibration frequency, a figure of merit or an efficiency parameter related to the output power will increase, as well. On the other hand, if there is a misalignment between the harvester’s heading and wind direction due to change of the latter one, the harvesting performance deteriorates. Although the base harvester can realign in certain ranges of sideslip angle at each wind speed, when the tail mechanism is integrated into that, it broadens the range of realignable sideslip angles at all the investigated wind speeds by up to 80°.

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“…Engineers can create UAV wings that exhibit enhanced aerodynamic performance by studying and replicating the structural features of these wings, such as their shape, flexibility, and surface textures. This includes improved lift-to-drag ratios, increased maneuverability, and reduced energy consumption during flight [18][19][20]. For instance, using flexible wing structures inspired by bird wings allows for adaptive wing morphing, enabling UAVs to adjust their wing shape in real time to optimize performance under different flight conditions [21].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Application of an SMA-Actuated Lightweight Human-Inspired Gripper for Aerial Manipulation

Perez-Sanchez,

Garcia-Rubiales,

Nekoo

et al. 2023

Machines

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The increasing usage of multi-rotor aerial platforms and the reliability of flights enabled researchers to add equipment and devices to them for application. The addition of lightweight manipulators, grippers, and mechanisms to fulfill specific tasks has been reported frequently recently. This work pushes the idea one step ahead and uses an Artificial Human Hand (AHH) in an uncrewed aerial vehicle for aerial manipulation, device delivery, and co-operation with human workers. This application requires an effective end-effector capable of grasping and holding objects of different shapes. The AHH is a lightweight custom-made human-inspired design actuated using Shape Memory Alloy (SMA) materials. The SMA actuators offer significantly high forces with respect to their light weights though the control of these new actuators is a challenge that has been successfully demonstrated in this paper. The control of the SMA actuators could be achieved via heat exchange on the actuator, indirectly carried out by changing the current. The benefit of using this new actuator is removing the motors and mechanical mechanisms and simplifying the design. A soft cover is developed for the AHH to add friction and make it closer to a human hand. The modeling of the structured actuators on the system through tendons is presented, and a series of experiments for handling and manipulating different objects have been conducted. The objects were chosen with different weights and shapes to show the effectiveness of the design. An analysis of a generated torque of the manipulator for different cylindrical objects has been carried out. An analysis and comparison for grasping a series of items, pressure and temperature analysis, and the weight-to-volume ratio have been presented.

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Aerodynamic analysis of insect-like flapping wings in fan-sweep and parallel motions with the slit effect

Cited by 5 publications

References 36 publications

A Bibliometric Analysis of Flapping Wing Instrumentation

A Bibliometric Analysis of Flapping Wing Instrumentation

Adaptivity of a leaf-inspired wind energy harvester with respect to wind speed and direction

Modeling and Application of an SMA-Actuated Lightweight Human-Inspired Gripper for Aerial Manipulation

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