Results 31 to 40 of about 528 (167)
Novel Dihedral-Based Control of Flapping-Wing Aircraft With Application to Perching [PDF]
IEEE Transactions on Robotics, 2013 We describe the design of an aerial robot inspired by birds and the underlying theoretical developments leading to novel control and closed-loop guidance algorithms for a perching maneuver. A unique feature of this robot is that it uses wing articulation to control the flight path angle as well as the heading angle.
Aditya A. Paranjape +2 more
openaire +2 more sources
Design and Analysis of A Two-stage Bionic Flapping Wing Aircraft
Journal of Physics: Conference Series, 2023 Abstract To develop an aircraft with a certain load capacity, high lift, and high bionics, a two-stage bionic flapping wing aircraft was designed according to the physiological structure of large birds. Firstly, the degrees of freedom of the transmission mechanism of flapping wing aircraft are calculated, and the dimensions of each ...
Xiaokun Fu +3 more
openaire +1 more source
Attitude control of flapping wing aircraft based on energy optimization and ESO
Biomimetic Intelligence and Robotics, 2021 Aiming at the problem of insufficient endurance performance of flapping wing aircraft, a stable attitude control algorithm based on energy optimization and ESO (extended state observer) is designed, which effectively reduces the energy consumption in ...
Luo Li, Hongwei Wang, Long Cui
doaj +1 more source
Flight of the dragons: a global review of migration in Odonata
Biological Reviews, EarlyView.ABSTRACT Insects are the most abundant and ecologically important animal migrants. Yet, we know relatively little about the patterns and processes underlying insect migration. Dragonflies (Anisoptera) and damselflies (Zygoptera) comprise the ancient insect order Odonata, whose ancestors were the first organisms to fly on Earth.
Johanna S.U. Hedlund +3 more
wiley +1 more source
The Effect of Torsional and Bending Stiffness on the Aerodynamic Performance of Flapping Wing
Aerospace, 2023 For large bird-like flapping wing aircraft, the fluid–structure coupling problem is very important. Through the passive torsional deformation of the wing, sufficient thrust is generated and propulsion efficiency is ensured.
Ming Qi, Wenguo Zhu, Shu Li
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Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source
AIP Advances, 2020 In the present study, a bionic flapping mechanism of a spatial six-bar configuration was designed to transform a single rotation of a motor into a three degrees of freedom “flapping–twist–swing” cooperative motion of a flapping wing. The kinematics model
Bing Ji +8 more
doaj +1 more source
Journal of Field Robotics, EarlyView.ABSTRACT Uncrewed underwater vehicles (UUVs) have transformed oceanographic research through autonomous data gathering. Similarly, lake and other aquatic research can potentially be automated and transformed. However, UUVs would need to be smaller, lighter, less complex, and cheaper than currently available to make them more practical and user‐friendly
James M Rand +3 more
wiley +1 more source
Flight Performance Estimation of Bionic Flapping-Wing Micro Air Vehicle [PDF]
Xibei Gongye Daxue Xuebao, 2018 Bionic flapping-wing micro air vehicle(MAV) has received worldwide attention.The flight performance calculation is an important step in the conceptual design.The differences in performance estimation methods between the flapping-wing and conventional ...
doaj +1 more source
Systems Research and Behavioral Science, EarlyView.ABSTRACT Modern engineering faces a ‘complexity crisis’ characterized by interlinked, multidisciplinary ‘wicked problems’, particularly within the defence and aerospace sectors. Although systems thinking is recognized as a critical competency for navigating this environment, empirical quantitative frameworks for its measurement remain limited.
Shimon Fridkin, Sigal Kordova
wiley +1 more source