Bioinspired Energy Harvesting from Atmospheric Phenomena for Small Unmanned Aerial Vehicles

Gavrilovic, Nikola; Bronz, Murat; Moschetta, Jean‐Marc

doi:10.2514/1.g004730

Cited by 9 publications

(4 citation statements)

References 34 publications

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“…Multiple sensors were efficiently assembled within the synthetic compound eye and also had low power consumption. Birds' ability to use atmospheric conditions to benefit their flight was exploited in a design based on harvesting energy under different wind conditions [89]. The experimental analysis revealed that harvesting energy using various pressure sensors and other components enabled the aircraft to maintain altitude.…”

Section: (B) Sensorsmentioning

confidence: 99%

State of the Art Review about Bio-Inspired Design and Applications: An Aerospace Perspective

et al. 2021

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The field of bio-inspired design has tremendously transitioned into newer automated methods, yet there are methods being discovered which can elucidate underlying principles in design, materials, and manufacturing. Bio-inspired design aims to translate knowledge from the natural world to the current trends in industry. The recent growth in additive manufacturing (AM)methods has fueled the tremendous growth of bio-inspired products. It has enabled the production of intricate and complicated features notably used in the aerospace industry. Numerous methodologies were adopted to analyse the process of bio-inspired material selection, manufacturing methods, design, and applications. In the current review, different approaches are implemented to utilize bio-inspired designs that have revolutionized the aerospace industry, focusing on AM methods.

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Section: (B) Sensorsmentioning

confidence: 99%

State of the Art Review about Bio-Inspired Design and Applications: An Aerospace Perspective

et al. 2021

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“…For small uncrewed aerial systems (UAS), however, traditional designs leveraging the simplicity of rigidity and decades of optimal aeronautical insight are often accompanied by fragile gust and turbulence response [7][8][9]. Research concerning UAS gust mitigation is therefore a vibrant and important area of inquiry [10][11][12][13] and has also emerged as a possible means for UAS-based kinetic power generation [14][15][16]. The robust response of birds in transient atmospheric conditions motivates bio-inspired mitigation studies.…”

Section: Introductionmentioning

confidence: 99%

Shoulder viscoelasticity in a raptor-inspired model alleviates instability and enhances passive gust rejection

Stanton

2024

Bioinspir. Biomim.

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Recent experiments with gliding raptors reveal a perplexing dichotomy: remarkably resilient gust rejection, but, at the same time, an exceptionally high degree of longitudinal instability. To resolve this incompatibility, a multiple degree of freedom model is developed with minimal requisite complexity to examine the hypothesis that the bird shoulder joint may embed essential stabilizing and preflexive mechanisms for rejecting rapid perturbations while simplifying and reducing control effort. Thus, the formulation herein is centrally premised upon distinct wing pitch and body pitch angles coupled via a Kelvin-Voigt viscoelastic shoulder joint. The model accurately exhibits empirical gust response of an unstable gliding raptor, generates biologically plausible equilibrium configurations, and the viscoelastic shoulder coupling is shown to drastically alleviate the high degree of instability predicted by conventional linear flight dynamics models. In fact, stability analysis of the model predicts a critical system timescale (the time to double amplitude of a pitch divergence mode) that is commensurate with in vivo measured latency of barn owls (\textit{Tyto alba}). Active gust mitigation is studied by presupposing the owl behaves as an optimal controller. The system is under-actuated and the feedback control law is resolved in the controllable subspace using a Kalman decomposition. Importantly, control-theoretic analysis precisely identifies what discrete gust frequencies may be rapidly and passively rejected versus disturbances requiring feedback control intervention.

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“…The possibility of gaining energy from the wind so that engineless flight is feasible has stimulated research interest in using the wind as an energy source for technical applications. Evidence for this perspective is found in biologically inspired research and development activities directed at utilizing the dynamic soaring mode of albatrosses for aerial vehicles [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement by Wing Sweep for High-Speed Dynamic Soaring

2021

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Dynamic soaring is a flight mode that uniquely enables high speeds without an engine. This is possible in a horizontal shear wind that comprises a thin layer and a large wind speed. It is shown that the speeds reachable by modern gliders approach the upper subsonic Mach number region where compressibility effects become significant, with the result that the compressibility-related drag rise yields a limitation for the achievable maximum speed. To overcome this limitation, wing sweep is considered an appropriate means. The effect of wing sweep on the relevant aerodynamic characteristics for glider type wings is addressed. A 3-degrees-of-freedom dynamics model and an energy-based model of the vehicle are developed in order to solve the maximum-speed problem with regard to the effect of the compressibility-related drag rise. Analytic solutions are derived so that generally valid results are achieved concerning the effects of wing sweep on the speed performance. Thus, it is shown that the maximum speed achievable with swept wing configurations can be increased. The improvement is small for sweep angles up to around 15 deg and shows a progressive increase thereafter. As a result, wing sweep has potential for enhancing the maximum-speed performance in high-speed dynamic soaring.

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Bioinspired Energy Harvesting from Atmospheric Phenomena for Small Unmanned Aerial Vehicles

Cited by 9 publications

References 34 publications

State of the Art Review about Bio-Inspired Design and Applications: An Aerospace Perspective

State of the Art Review about Bio-Inspired Design and Applications: An Aerospace Perspective

Shoulder viscoelasticity in a raptor-inspired model alleviates instability and enhances passive gust rejection

Performance Enhancement by Wing Sweep for High-Speed Dynamic Soaring

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