Results 81 to 90 of about 14,458 (214)

Quadcopter Aggressive Maneuvers along Singular Configurations: An Energy-Quaternion Based Approach

Journal of Control Science and Engineering, 2016
Automatic aggressive maneuvers with quadcopters are regarded as a highly challenging control problem. The aim is to tackle the singularities that exist in a vertical looping maneuver. Modeling singularities are resolved by writing the equations-of-motion
Ayman A. El-Badawy, Mohamed A. Bakr
doaj   +1 more source

Design and Implementation of a Dual-Axis Tilting Quadcopter

Robotics, 2018
Standard quadcopters are popular largely because of their mechanical simplicity relative to other hovering aircraft, low cost and minimum operator involvement.
Ali Bin Junaid, Alejandro Diaz De Cerio Sanchez, Javier Betancor Bosch, Nikolaos Vitzilaios, Yahya Zweiri   +4 more
doaj   +1 more source

Cascade PID Control for Altitude and Angular Position Stabilization of 6-DOF UAV Quadcopter

International Journal of Robotics and Control Systems
UAVs are commonly used in transportation, especially in the express delivery of light cargo parcels. However, controlling UAVs is difficult because of their complex structure and wide range of operations in space.
M. Trinh, Tụ Ngọc Trần, Ân Văn Võ   +2 more
semanticscholar   +1 more source

Tracing Human Footprint in Bird Nests: Plastic Occurrence and Drivers in the Long‐Legged Buzzard (Buteo rufinus)

Ecology and Evolution, Volume 16, Issue 9, September 2026.
Long‐legged Buzzard (Buteo rufinus) nests function as long‐term reservoirs of macroplastics, with plastic material persisting in nest structures and being transferred to other bird species through interspecific nest reuse. This persistence creates an overlooked pathway for the accumulation and spread of plastic pollution in terrestrial ecosystems, with
Emanuel‐Ștefan Baltag, Vitalie Ajder, Laura‐Elena Topală, Ianula Duță, Viorel Dumitru Gavril   +4 more
wiley   +1 more source

Continuous Genetic Algorithm Aiding to Quadcopter Controller Design

The practicability of the continuous Genetic Algorithm (GA) is exploited to optimize the Proportional Integral Derivative (PID) controller gains, in this paper.
Tran Huu Khoa, Tran Thanh Trang
core   +1 more source

Is Spread Spectrum Sound a Robust Local Positioning System for a Quadcopter Operating in a Greenhouse?

Chemical Engineering Transactions, 2017
This paper evaluates the robustness of a hybrid Spread Spectrum Sound Local Positioning System (SSSLPS)/ Inertial Navigation System (INS) navigation system for use with a quadcopter with respect to two issues: noise interference from the quadcopter (80 ...
Z. Huang, M. Ono, T. Shiigi, T. Suzuki, H. Habaragamuwa, H. Nakanishi, N. Kondo   +6 more
doaj   +1 more source

Trajectory Tracking Control for a Quadcopter under External Disturbances

Engineering, Technology & Applied Science Research
This paper initially discusses the application of a Sliding Mode Controller (SMC) for drone control, encompassing vertical takeoff and landing. Subsequently, the dynamic model of the quadcopter is formulated using the Newton-Euler method.
C. Nguyen, M. T. Nguyen, Hoa T. Tran, M. Trinh, H. M. La, Hoa T. T. Nguyen   +5 more
semanticscholar   +1 more source

Ultra‐Thin Bipoly Solar Cells With Front Selective n‐Type TOPCon and Rear Blanket p‐Type TOPCon Layers

Progress in Photovoltaics: Research and Applications, Volume 34, Issue 9, Page 1113-1124, September 2026.
Large area crystalline silicon solar cells fabricated on ultra‐thin (80 μm) Si wafer featuring polysilicon‐based passivating contacts on both sides can further increase the energy output per unit weight. In this work, the large area, screen‐printed solar cells with high temperature fire‐through contacts, yielded an exceptional efficiency‐to‐thickness ...
Yuchi Lan, John Derek Arcebal, Gabby De Luna, Pradeep Padhamnath, Armin Gerhard Aberle, Aaron Danner   +5 more
wiley   +1 more source

The Duntulm sauropod tracksite and environmental partitioning in Middle Jurassic dinosaurs on the Isle of Skye, Scotland

Papers in Palaeontology, Volume 12, Issue 5, September/October 2026.
Abstract Dinosaur fossils from the Isle of Skye (Scotland, UK), particularly the abundant trace fossil record, provide a window into dinosaur evolution during the poorly known Middle Jurassic. Here we present a comprehensive description of the Duntulm tracksite from Cairidh Ghlumaig Bay, using aerial photography to provide whole site maps, catalogue ...
Paige E. dePolo, Stephen L. Brusatte, Thomas J. Challands, Davide Foffa, Mark Wilkinson, Neil D. L. Clark, Dugald A. Ross, Thomas J. Wade   +7 more
wiley   +1 more source

Autonomous Navigation of Flying Quadcopter [PDF]

, 2015
The goal of the project is to design a semi-autonomous Quadcopter, capable of self-controlled flight with the help of wireless communications. It utilises an Arducopter Version 2.6 having an in-built microcontroller.
, Moulesh Kumar, Nitish Kumar, Dr. T. H. Sreenivas
core   +1 more source