Results 61 to 70 of about 277,634 (332)

Unmanned Aerial Vehicles (UAVs): Collision Avoidance Systems and Approaches

IEEE Access, 2020
Moving towards autonomy, unmanned vehicles rely heavily on state-of-the-art collision avoidance systems (CAS). A lot of work is being done to make the CAS as safe and reliable as possible, necessitating a comparative study of the recent work in this ...
J. Yasin, S. Mohamed, M. Haghbayan, J. Heikkonen, H. Tenhunen, J. Plosila   +5 more
semanticscholar   +1 more source

Surveying Wild Animals from Satellites, Manned Aircraft and Unmanned Aerial Systems (UASs): A Review

Remote Sensing, 2019
This article reviews studies regarding wild animal surveys based on multiple platforms, including satellites, manned aircraft, and unmanned aircraft systems (UASs), and focuses on the data used, animal detection methods, and their accuracies.
Dongliang Wang, Q. Shao, Huanyin Yue
semanticscholar   +1 more source

Geometric Attitude Fault-Tolerant Control of Quadrotor Unmanned Aerial Vehicles with Adaptive Extended State Observers

Machines
This paper is concerned with the attitude tracking problem of quadrotor unmanned aerial vehicles (UAVs) with respect to endogenous uncertainties, exogenous disturbances and actuator failures.
Liping Wang, Hailong Pei, Zihuan Cheng
doaj   +1 more source

MXene‐Coated 3D Printed Horn Antennas for Ku Frequency Band

Advanced Materials Technologies, EarlyView.
An additive manufacturing approach to 3D printing horn antennas and coating them with Ti3C2Tx MXene is proposed. Rapid fabrication of lightweight, high‐performance antennas operating in the Ku‐band (12.4–18 GHz) has been demonstrated. The MXene‐coated antennas exhibit comparable electromagnetic performance to conventional, costly aluminum ones, with ...
Zahra Sarpanah Sourkouhi, Jamal Alhourani, Yury Gogotsi, Mohammad H. Zarifi   +3 more
wiley   +1 more source

Vision‐Assisted Avocado Harvesting with Aerial Bimanual Manipulation

Advanced Robotics Research, EarlyView.
This work outlines the design and implementation of a bimanual aerial robot that employs visual perception and learning to detect, reach, and harvest avocados. A new gripper and fixer arm assembly is used to harvest avocados, while visual perception enables the detection of avocados and estimation of their position and orientation for determining ...
Zhichao Liu, Jingzong Zhou, Caio Mucchiani, Konstantinos Karydis   +3 more
wiley   +1 more source

Fault-tolerant formation driving mechanism designed for heterogeneous MAVs-UGVs groups [PDF]

, 2013
A fault-tolerant method for stabilization and navigation of 3D heterogeneous formations is proposed in this paper. The presented Model Predictive Control (MPC) based approach enables to deploy compact formations of closely cooperating autonomous aerial ...
A Abdessameud, AL Christensen, C Liu, DQ Mayne, F Xiao, G Heredia, G Heredia, H Tanner, J Ghommam, K Hengster-Movrić, KD Do, Libor Přeučil, M Alamir, M Saffarian, Martin Saska, O Barambones, P Boscariol, T Krajník, T Krajník, T Krajník, TD Barfoot, Tomáš Krajník, TS No, Vojtěch Spurný, Vojtěch Vonásek, W Dong, X Zhang, Y Liu, Z Chao, Zdeněk Kasl   +29 more
core   +1 more source

Drones for parcel and passenger transportation: A literature review [PDF]

, 2020
Delivery drones and ‘air taxis’ are currently among the most intensely discussed emerging technologies, likely to expand mobility into the ‘third dimension’ of low-level airspace.
Biehle, Tobias, Fischer, Liliann, Kellermann, Robin   +2 more
core   +1 more source

Software Radios for Unmanned Aerial Systems [PDF]

Proceedings of the 1st International Workshop on Open Software Defined Wireless Networks, 2020
As new use cases are emerging for unmanned aerial systems (UAS), advanced wireless communications technologies and systems need to be implemented and widely tested. This requires a flexible platform for development, deployment, testing and demonstration of wireless systems with ground and aerial nodes, enabling effective 3D mobile communications and ...
Powell, Keith, Sabri, Aly, Brennan, Daniel, Marojevic, Vuk, Barts, R. Michael, Panicker, Ashwin, Ozdemir, Ozgur, Guvenc, Ismail   +7 more
openaire   +2 more sources

Unmanned Aerial Systems for Investigating the Polar Atmospheric Boundary Layer—Technical Challenges and Examples of Applications

Atmosphere, 2020
Unmanned aerial systems (UAS) fill a gap in high-resolution observations of meteorological parameters on small scales in the atmospheric boundary layer (ABL).
A. Lampert, B. Altstädter, K. Bärfuss, L. Bretschneider, Jesper Sandgaard, J. Michaelis, L. Lobitz, Magnus Asmussen, E. Damm, R. Käthner, T. Krüger, C. Lüpkes, S. Nowak, Alexander Peuker, T. Rausch, F. Reiser, A. Scholtz, Denis Sotomayor Zakharov, D. Gaus, S. Bansmer, B. Wehner, F. Pätzold   +21 more
semanticscholar   +1 more source

Recent Advances in Variable‐Stiffness Robotic Systems Enabled by Phase‐Change Materials

Advanced Robotics Research, EarlyView.
Phase‐change materials (PCMs), such as shape memory alloys, hydrogels, shape memory polymers, liquid crystal elastomers, and low‐melting‐point alloys, are driving advancements in stiffness‐tunable robotic systems across a wide range of applications. This review highlights recent progress in PCM‐enabled robotics, focusing on their underlying mechanisms,
Sukrit Gaira, Liao Wu, Ming Li, Priyank Kumar, Xiaopeng Li, Shi‐Yang Tang   +5 more
wiley   +1 more source