Results 1 to 10 of about 17,694,616 (233)

Research on the Collaborative Operational Mode and Key Technologies of Manned/Unmanned Aerial Vehicles [PDF]

open access: yesHangkong bingqi, 2021
With the continuous progress of military technology, unmanned aerial vehicles have been more and more widely used in military operation and play an increasingly important role.
Sun Shengzhi, Meng Chunning, Hou Yan, Cai Xiaobin
doaj   +1 more source

Research on the Effect of Spindle Speed on the Softening and Hardening Characteristics of the Axial Operating Stiffness of Machine Tool Spindle

open access: yesLubricants, 2022
Spindle stiffness is one of the most critical indicators for evaluating and measuring the service performance of spindles. The traditional static stiffness indexes only involve static analysis and rarely focus on the study of spindle-carrying capacity ...
Jiandong Li   +6 more
doaj   +1 more source

Wear debris measurement in lubricating oil based on inductive method: A review

open access: yesMeasurement + Control, 2023
Almost all of the wear debris generated during the operation of the machine is suspended in the circulating lubricating oil. The analysis of the wear debris in the lubricating oil can effectively monitor the wear state of the machine and provide early ...
Shimin Yang, Nan Cao, Bing Yu
doaj   +1 more source

Technical Configurations of a Helicopter Type Unmanned Aerial System for Pesticide and Fertilizer Application

open access: yesСельскохозяйственные машины и технологии, 2021
It was noted that when forming the configurations of an unmanned aerial system for pesticide and fertilizer application, it is necessary to take into account the interdependence of unmanned and ground-based aerial systems.
L. A. Marchenko   +3 more
doaj   +1 more source

Concept for the Construction and Application of a Counter-UAV Defence System [PDF]

open access: yesProblemy Mechatroniki, 2021
This paper describes a concept for the construction and application of the Counter-UAV Defence System as developed by the Polish consortium of Zakłady Mechaniczne “Tarnów” S.A. (ZMT) and Military University of Technology (MUT).
Damian WOJTYRA   +3 more
doaj   +1 more source

A hybrid thrusting system for increasing the endurance time of multirotor unmanned aerial vehicles

open access: yesInternational Journal of Advanced Robotic Systems, 2023
One of the most significant disadvantages of electric multirotor unmanned aerial vehicles is their short flight time compared to fuel-powered unmanned aerial vehicles. This is mainly due to the low energy density of electric batteries. Fuel has much more
Jawad Bdour, Belal H Sababha
doaj   +1 more source

Distributed Robust Formation Tracking Control for Quadrotor UAVs with Unknown Parameters and Uncertain Disturbances

open access: yesAerospace, 2023
In this paper, the distributed formation tracking control problem of quadrotor unmanned aerial vehicles is considered. Adaptive backstepping inherently accommodates model uncertainties and external disturbances, making it a robust choice for the dynamic ...
Linxing Xu, Yang Li
doaj   +1 more source

Application of the Fuzzy AHP -VIKOR hybrid model in the selection of an unmanned aircraft for the needs of tactical units of the armed forces [PDF]

open access: yesScientific Technical Review, 2021
Unmanned aerial vehicles represent an indispensable segment in the range of weapons of both military and police units. The expansion in development of unmanned aerial vehicles for both commercial and military purposes has created a need for constant ...
Radovanović Marko   +3 more
doaj   +1 more source

Multi-Object Tracking with Distributed Drones’ RGB Cameras Considering Object Localization Uncertainty

open access: yesDrones
Reliable 3D multi-object tracking (MOT) using distributed drones remains challenging due to the lack of active sensing and the ambiguity in associating detections from different views. This paper presents a passive sensing framework that integrates multi-
Xin Liao   +4 more
doaj   +1 more source

An Energy Efficient Design of Computation Offloading Enabled by UAV

open access: yesSensors, 2020
The data volume is exploding due to various newly-developing applications that call for stringent communication requirements towards 5th generation wireless systems.
Linpei Li   +3 more
doaj   +1 more source

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