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Design and Aerodynamic Analysis of a Flapping Mechanism for Foldable Biomimetic Aircraft.
Biomimetics (Basel)
January 2025
Automotive Parts Research Institute, Hunan University of Technology, Hengyang 421002, China.
This study investigates the unsteady aerodynamic mechanisms underlying the efficient flight of birds and proposes a biomimetic flapping-wing aircraft design utilizing a double-crank double-rocker mechanism. Building upon a detailed analysis of avian flight dynamics, a two-stage foldable flapping mechanism was developed, integrating an optimized double-crank double-rocker structure with a secondary linkage system. This design enables synchronized wing flapping and spanwise folding, significantly enhancing aerodynamic efficiency and dynamic performance.
View Article and Find Full Text PDFInvestigating the design characteristics and parameter laws of bird-like flapping-wing aerial vehicles from the perspective of scaling.
Bioinspir Biomim
January 2025
Shaanxi Aerospace Propulsion Research Institute Co., Ltd., No. 996, Tiangu 7th Road, Xi'an, 710072, CHINA.
Bird-like flapping-wing aerial vehicles (BFAVs) represent a significant advancement in the application of bird biology to aircraft design, with scaling analysis serving as an effective tool for identifying this design process. From the perspective of aviation designers, this paper systematically organizes the scaling laws of birds that are closely related to the design of BFAVs. An intriguing topic further explored is the comparison between birds and BFAVs from the standpoint of scaling, along with an examination of the differences in relevant design parameters.
View Article and Find Full Text PDFGeometric description of a gliding grey-headed albatross () for computer-aided design.
Bioinspir Biomim
January 2025
Department of Mechanical and Aeronautical Engineering, University of Pretoria, 1 Lynnwood Road, Pretoria, 0002, SOUTH AFRICA.
Albatrosses are increasingly drawing attention from the scientific community due to their remarkable flight capabilities. Recent studies suggest that grey-headed albatrosses may be the fastest and most energy-efficient of the albatross species, yet no attempts have been made to replicate their wing design. A key factor in aircraft design is the airfoil, which remains uncharacterized for the grey-headed albatross.
View Article and Find Full Text PDFAssessing Mitigation Translocation as a Tool to Reduce Human-great Horned owl Conflicts.
Environ Manage
January 2025
United States Department of Agriculture, Animal Plant Health Inspection Service, Wildlife Services, Fort Collins, CO, USA.
The great horned owl (Bubo virginianus) is a generalist predator that inhabits wide-ranging territories that are relatively stable throughout the year. These owls are also involved in a variety of human-owl conflicts, including killing of domestic poultry, predating colonially nesting seabirds and shorebirds, and pose a hazard to safe aircraft operations. Managing these conflict situations presents unique challenges as great horned owls are nocturnally active and occupy a wide range of habitats.
View Article and Find Full Text PDFAerodynamic analysis of complex flapping motions based on free-flight biological data.
Bioinspir Biomim
January 2025
Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
The wings of birds contain complex morphing mechanisms that enable them to perform remarkable aerial maneuvers. Wing morphing is often described using five wingbeat motion parameters: flapping, bending, folding, sweeping, and twisting. However, the specific impact of these motions on the aerodynamic performance of wings throughout the wingbeat cycle, and their potential to inform engineering applications, remains insufficiently explored.
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