Results 81 to 90 of about 174,771 (214)

Modelling and Control Prototyping of Unmanned Helicopters

open access: yes, 2009
The idea of using UAV’s (Unmanned Aerial Vehicles) in civilian applications has created new opportunities for companies dedicated to inspections, surveillance or aerial photography amongst others. Nevertheless, the main drawback for using this kind of vehicles in civilian applications is the enormous cost, lack of safety and emerging legislation.
Jaime del-Cerro   +2 more
openaire   +2 more sources

Acceleration-Feedback-Enhanced Robust Control of an Unmanned Helicopter

open access: yes, 2010
While a few proposed control strategies have shown their acceptable effectiveness, performance improvement on stability and robustness of unmanned helicopters are still imperative and a great challenge due to strong nonlinearities, extensive parameter ...
He YQ(何玉庆), Han JD(韩建达)
core  

Fuzzy Model Predictive Control for Unmanned Helicopter

open access: yesApplied Sciences
Unmanned helicopters, due to their agility and strong dependence on environmental conditions, require using advanced control techniques in order to ensure precise trajectory tracking in various states of flight. The following paper presents a methodology
Łukasz Kiciński, Sebastian Topczewski
doaj   +1 more source

Development of technologies for low-cost oceanographic unmanned aeronautical vehicles

open access: yes, 2009
Oceanographic research vessels and buoys typically provide high-resolution, shortrange measurements at a high sample rate. Satellites provide wide-range, low-resolution measurements at a low sample rate.
Bennett, Matthew
core   +1 more source

Hovering Control on a Variable-Parameters Model of a Small Unmanned Helicopter Based on a Backstepping Sliding Mode Method

open access: yesApplied Sciences
In order to strengthen the hovering precision of a small unmanned helicopter with a manipulator for completing a hovering operation, in this study, a double-loop control strategy of position and attitude is designed.
Hongmei Zhang   +3 more
doaj   +1 more source

Wind field measurement for the supplementary pollination using two types unmanned helicopter in hybrid rice breeding

open access: yes, 2013
In order to understand the optimization parameters including helicoper flight altitude, direction and speed etc., while the unmanned helicopter conducts supplementary pollination, in this paper, a Wireless Wind Speed Sensor Network measurement system ...
Hu L(胡炼)   +7 more
core  

Development of operator training support system for small-scale helicopters by automatic recovery control with attitude and velocity stabilization

open access: yesNihon Kikai Gakkai ronbunshu, 2016
Applications of small unmanned helicopters are rapidly growing in the civilian and commercial field such as pesticide spraying, aerial filming, and inspection.
Naomichi ISOMURA, Daigo FUJIWARA
doaj   +1 more source

Conversion of a Coaxial Rotorcraft to a UAV—Lessons Learned

open access: yesAerospace
A coaxial helicopter with a maximum take-off weight of 600 kg was converted to an unmanned aerial vehicle. A minimally invasive robotic actuator system was developed, which can be retrofitted onto the copilot seat of the rotorcraft in a short period of ...
Barzin Hosseini   +4 more
doaj   +1 more source

LP Based Path Planning for Autonomous Landing of An Unmanned Helicopter on A Moving Platform

open access: yes, 2013
Autonomous landing of an unmanned helicopter (UH) on a moving platform can greatly expand its application field. In this paper, a path planning method based on linear programming (LP) is proposed in the relative coordination to finish the autonomous ...
Wu C(吴冲)   +3 more
core  

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