Bio-inspired gust mitigation system for a flapping wing UAV: modeling and simulation

Abbasi, S. H.; Mahmood, A.

doi:10.1007/s40430-019-2044-9

Cited by 12 publications

(5 citation statements)

References 20 publications

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“…It was capable of significantly affecting the aerodynamic characteristics of the robot. Abbasi et al designed an electromechanical feather module that consisted of a piezoelectric element as the sensor and actuator to sense and alleviate the forces acting on the wing to improve stability in turbulent conditions [111,112].…”

Section: Piezoelectric Actuator-driven Mechanismsmentioning

confidence: 99%

Bio-inspired flapping wing robots with foldable or deformable wings: a review

Zhang¹,

Zhao

2022

Bioinspir. Biomim.

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Traditional flapping-wing robots (FWRs) obtain lift and thrust by relying on the passive deformation of their wings which cannot actively fold or deform. In contrast, flying creatures such as birds, bats, and insects can maneuver agilely through active folding or deforming their wings. Researchers have developed many bio-inspired foldable or deformable wings (FDWs) imitating the wings of flying creatures. The foldable wings refer to the wings like the creatures’ wings that can fold in an orderly manner close to their bodies. Such wings have scattered feathers or distinct creases that can be stacked and folded to reduce the body envelope, which in nature is beneficial for these animals to prevent wing damage and ensure agility in crossing bushes. The deformable wings refer to the active deformation of the wings using active driving mechanisms and the passive deformation under the aerodynamic force, which functionally imitates the excellent hydrodynamic performance of the deformable body and wings of the creatures. However, the shape and external profile changes of deformable wings tend to be much smaller than that of folding wings. FDWs enable the FWRs to improve flight degree of flexibility, maneuverability, and efficiency and reduce flight energy consumption. However, FDWs still need to be studied, and a comprehensive review of the state-of-the-art progress of FDWs in FWR design is lacking. This paper analyzes the wing folding and deformation mechanisms of the creatures and reviews the latest progress of FWRs with FDWs. Furthermore, we summarize the current limitations and propose future directions in FDW design, which could help researchers to develop better FWRs for safe maneuvering in obstacle-dense environments.

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Section: Piezoelectric Actuator-driven Mechanismsmentioning

confidence: 99%

Bio-inspired flapping wing robots with foldable or deformable wings: a review

Zhang¹,

Zhao

2022

Bioinspir. Biomim.

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“…Research has been conducted on morphing-wings to characterize their performance compared to fixedwing UAVs [9,10]. Other groups have taken a detailed look at gust mitigation by mimicking feathers seen on gliding birds [11,12]. Bioinspired designs that mimic the motion of a bird flapping are also in development [13,14].…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic response of a red-tailed hawk to discrete transverse gusts

Bamford,

Swiney,

Nix

et al. 2024

Bioinspir. Biomim.

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A limiting factor in the design of smaller size uncrewed aerial vehicles is their inability to navigate through gust-laden environments. As a result, engineers have turned towards bio-inspired engineering approaches for gust mitigation techniques. In this study, the aerodynamics of a red-tailed hawk's response to variable-magnitude discrete transverse gusts was investigated. The hawk was flown in an indoor flight arena instrumented by multiple high-speed cameras to quantify the 3D motion of the bird as it navigated through the gust. The hawk maintained its flapping motion across the gust in all runs; however, it encountered the gust at different points in the flapping pattern depending on the run and gust magnitude. The hawk responded with a downwards pitching motion of the wing, decreasing the wing pitch angle to between -20° and -5°, and remained in this configuration until gust exit. The wing pitch data was then applied to a lower-order aerodynamic model that estimated lift coefficients across the wing. In gusts slower than the forward flight velocity (low gust ratio), the lift coefficient increases at a low-rate, to a maximum of around 2 to 2.5. In gusts faster than the forward flight velocity (high gust ratio), the lift coefficient initially increased rapidly, before increasing at a low-rate to a value around 4 to 5. In both regimes, the hawk's observed height change due to gust interaction was similar (and small), despite larger estimated lift coefficients over the high gust regime. This suggests another mitigation factor apart from the wing response is present. One potential factor is the tail pitching response observed here, which prior work has shown serves to mitigate pitch disturbances from gusts.

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“…In recent years, control researchers have been given considerable attention to quadrotors which belong to one of the classifications of unmanned aerial vehicles. The quadrotors have special features such as low cost, hovering, small size, and very fast maneuvering [1]. The main applications of quadrotors are in agriculture, security surveillance, wildfire surveillance, mapping, and so on [2].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Backstepping and Sliding Mode Control of a Quadrotor

maaruf,

Gulzar,

Abubakar

2024

Preprint

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Quadrotors are increasingly employed for both civilian and military applications. Recently, researchers have combined different control and estimation schemes to come up with a hybrid control structure to improve the robustness and tracking performance of the quadrotors. To further enhance the tracking precision of quadrotors subjected to parametric variations and environmental disturbances, this article proposes a new robust adaptive hybrid control architecture. In this study, the quadrotor model is divided into altitude, attitude, and position subsystems for which appropriate control methods are designed. A fractional-order sliding mode control with adaptive gain (AFSMC) is designed to enhance the tracking of the altitude subsystem. A robust backstepping control with adaptive gain (RAB) is developed for the horizontal position to generate the required roll and pitch orientations. A nonsingular fast terminal sliding mode control (NFTSMC) is incorporated with a finite-time disturbance observer (FDO) to accurately suppress the disturbances, follow the target rotation angles, and attain finite-time stability. The compounded control structure ensures accurate, fast, and robust tracking. The efficacy of the developed hybrid control scheme is assessed via simulations and comparisons with existing control methods.

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Bio-inspired gust mitigation system for a flapping wing UAV: modeling and simulation

Cited by 12 publications

References 20 publications

Bio-inspired flapping wing robots with foldable or deformable wings: a review

Bio-inspired flapping wing robots with foldable or deformable wings: a review

Aerodynamic response of a red-tailed hawk to discrete transverse gusts

Adaptive Backstepping and Sliding Mode Control of a Quadrotor

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