Flutter boundary prediction of an adaptive morphing wing for unmanned aerial vehicle

Sabri, Farhad; Meguid, S. A.

doi:10.1007/s10999-011-9169-z

Cited by 13 publications

(17 citation statements)

References 10 publications

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“…To compensate for different flight mission profiles, wing morphing is essential. The most common and conventional forms of single degree-of-freedom (DOF) morphing include airfoil [13][14][15], twist [16][17][18], sweep [19,20], span [21,22], and cant morphing [23,24].…”

Section: Aeronautical Morphing Mechanismsmentioning

confidence: 99%

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Kinematic Modelling of a Panel Enclosed Mechanism

Yu¹

2021

Preprint

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This thesis presents a new method for kinematic modeling and analysis of a six degree-of-freedom parallel robot enclosed by a number of sliding panels, called panel enclosed mechanism. This type of robots has been seen in applications where mechanisms are covered by changeable surfaces, such as aircraft morphing wings made of variable geometry truss manipulators. Based on the traditional parallel robot kinematics, the proposed method is developed to model the motions of a multiple segmented telescopic rigid panels that are attached to the moving branches of the mechanism. Through this modeling and analysis, a collision detection algorithm is proposed to analyze the collisions that could occur between adjacent sliding panels during motion over the workspace of the mechanism. This algorithm will help to design a set of permissible panels used to enclose the mechanism free of collision. A number of cases are simulated to show the effectiveness of the proposed method. In addition, an extra link is added to provide an additional degree-of-freedom. Various search methods are employed to evaluate optimal orientation angles to minimize collisions of adjacent panels. Finally, the effect of increased mobility is analyzed and validated as a potential solution to reduce panel collisions.

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Section: Aeronautical Morphing Mechanismsmentioning

confidence: 99%

“…Such properties make it difficult to bear loads. In addition, operation periods of the elastomers may be a concern due to variable strain relationships, hence leading to issues of fatigue [19,20,32].…”

Section: Elastomersmentioning

confidence: 99%

Kinematic Modelling of a Panel Enclosed Mechanism

Yu¹

2021

Preprint

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“…To perform its mission, a flapping wing needs an actuation mechanism [8,9]. The type of actuation mechanism is dependent on the type of the system [9][10][11]. For example, for flapping wings at MAV scale, several fabrication and actuation methods were applied and most of them are similar to the commercial FWMAVs, such as Delfly [10,12], Slowhawk2 [13], kinkade [14], and Kestrel [15].…”

Section: Introductionmentioning

confidence: 99%

Towards Improved Hybrid Actuation Mechanisms for Flapping Wing Micro Air Vehicles: Analytical and Experimental Investigations

Hassanalian

Abdelkefi

2019

Drones

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A new strategy is proposed in order to effectively design the components of actuation mechanisms for flapping wing micro air vehicles. To this end, the merits and drawbacks of some existing types of conventional flapping actuation mechanisms are first discussed qualitatively. Second, the relationships between the design of flapping wing actuation mechanism and the entrance requirements including the upstroke and downstroke angles and flapping frequency are determined. The effects of the components of the actuation mechanism on the kinematic and kinetic parameters are investigated. It is shown that there are optimum values for different parameters in order to design an efficient mechanism. Considering the optimized features for an actuation mechanism, the design, analysis, and fabrication of a new hybrid actuation mechanism for FWMAV named "Thunder I" with fourteen components consisting of two six-bar mechanisms are performed. The results show that this designed hybrid actuation mechanism has high symmetrical flapping motion with hinged connections for all components. The proposed methodology for the modeling and fabrication of Thunder I's actuation mechanism can be utilized as guidelines to design efficient FWMAVs actuation mechanisms.Drones 2019, 3, 73 2 of 21 amplification. This mechanism could provide the hovering capability for a small size flapping wing NAV. As for flapping wing at PAV scale, Wood et al. [22] have developed modern flapping wings which use piezoelectric actuators to generate flapping motion. Selecting the appropriate actuator is considered as an important part for designing effective flapping wing. Depending on the type of the system, different actuators can be used to perform the mission including electric motors, piezoelectric elements, solenoids, and Shape Memory Alloys (SMA) wires [23][24][25][26][27].Research on flapping wing MAVs has led to a variety of actuation mechanisms which are designed for flapping motion. These actuation mechanisms are four-bar, five-bar, and six-bar mechanisms. As for the four-bar actuation mechanism, five types have been used, as shown in Figure 1 [28-30].Drones 2019, 3, x FOR PEER REVIEW 2 of 20 mechanism for motion amplification. This mechanism could provide the hovering capability for a small size flapping wing NAV. As for flapping wing at PAV scale, Wood et al. [22] have developed modern flapping wings which use piezoelectric actuators to generate flapping motion. Selecting the appropriate actuator is considered as an important part for designing effective flapping wing. Depending on the type of the system, different actuators can be used to perform the mission including electric motors, piezoelectric elements, solenoids, and Shape Memory Alloys (SMA) wires [23][24][25][26][27].Research on flapping wing MAVs has led to a variety of actuation mechanisms which are designed for flapping motion. These actuation mechanisms are four-bar, five-bar, and six-bar mechanisms. As for the four-bar actuation mechanism, five types have been used, as shown in Figure 1 [2...

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“…Nowadays, nearly a million species of flying insects and birds are recognized by biologists which can be investigated by researchers and designers in order to design and fabricate more applicable flapping wings [10]. Thus, a new trend in the drone community is to take inspiration from natural flying insects or birds to achieve improved flight capabilities and maneuverability [1,11].…”

Section: Introductionmentioning

confidence: 99%

Insights into Sensitivity of Wing Shape and Kinematic Parameters Relative to Aerodynamic Performance of Flapping Wing Nano Air Vehicles

Throneberry

Hassanalian

Abdelkefi

2019

Drones

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In this work, seven wings inspired from insects’ wings, including those inspired by the bumblebee, cicada, cranefly, fruitfly, hawkmoth, honeybee, and twisted parasite, are patterned and analyzed in FlapSim software in forward and hovering flight modes for two scenarios, namely, similar wingspan (20 cm) and wing surface (0.005 m2). Considering their similar kinematics, the time histories of the aerodynamic forces of lift, thrust, and required mechanical power of the inspired wings are calculated, shown, and compared for both scenarios. The results obtained from FlapSim show that wing shape strongly impacts the performance and aerodynamic characteristics of the chosen seven wings. To study the effects of different geometrical and physical factors including flapping frequency, elevation amplitude, pronation amplitude, stroke-plane angle, flight speed, wing material, and wingspan, several analyses are carried out on the honeybee-inspired shape, which had a 20 cm wingspan. This study can be used to evaluate the efficiency of different bio-inspired wing shapes and may provide a guideline for comparing the performance of flapping wing nano air vehicles with forward flight and hovering capabilities.

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Flutter boundary prediction of an adaptive morphing wing for unmanned aerial vehicle

Cited by 13 publications

References 10 publications

Kinematic Modelling of a Panel Enclosed Mechanism

Kinematic Modelling of a Panel Enclosed Mechanism

Towards Improved Hybrid Actuation Mechanisms for Flapping Wing Micro Air Vehicles: Analytical and Experimental Investigations

Insights into Sensitivity of Wing Shape and Kinematic Parameters Relative to Aerodynamic Performance of Flapping Wing Nano Air Vehicles

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