Design of an autonomous unmanned aircraft flight path controller

Author(s):  
B. M. Albaker ◽  
N. A. Rahim
2014 ◽  
Vol 6 (5) ◽  
pp. 577-582
Author(s):  
Ramūnas Kikutis ◽  
Jonas Stankūnas

Today small unmanned aircraft are being more widely adapted for practical tasks. These tasks require high reliability and flight path accuracy. For such aircraft we have to deal with the chalenge how to compensate external factors and how to ensure the accuracy of the flight trajectory according to new regulations and standards. In this paper, new regulations for the flights of small unmanned aircraft in Lithuanian air space are discussed. Main factors, which affect errors of the autonomous flight path tracking, are discussed too. The emphasis is on the wind factor and the flight path of Dubbin’s trajectories. Research was performed with mathematical-dynamic model of UAV and it was compared with theoretical calculations. All calculations and experiments were accomplished for the circular part of Dubbin’s paths when the airplane was trimmed for circular trajectory flight in calm conditions. Further, for such flight the wind influence was analysed. Nedideli autonominiai orlaiviai yra vis plačiau pritaikomi praktinėms užduotims, kurioms reikalingas aukštas skrydžio patikimumas bei trajektorijos tikslumas, vykdyti. Kuriant bei naudojant tokius orlaivius, reikia vertinti egzistuojančių standartų bei taisyklių reikalavimus ir išorinių faktorių įtaką skrydžių trajektorijos tikslumui. Darbe aptariamos naujausios skrydžių autonominiais orlaiviais Lietuvoje taisyklės bei pagrindiniai faktoriai, darantys įtaką skrydžio trajektorijos paklaidoms. Darbe didžiausias dėmesys skirtas vėjo faktoriaus įtakos skrydžio trajektorijai vertinti, kai automatinio valdymo sistema nesiima koreguojamųjų veiksmų. Tyrimas atliktas remiantis teoriniais skaičiavimais bei traktuojant, kad orlaivis – taškinis kūnas. Šie rezultatai palyginti su gautaisiais panaudojus orlaivio dinaminį modelį.


Author(s):  
Eric Lyons ◽  
David Westbrook ◽  
Andrew Grote ◽  
George Papadimitriou ◽  
Komal Thareja ◽  
...  

Author(s):  
R. N. Bukhtin

The paper shows the research results of the effect of a spherical hollow space on the aircraft flight path. By flow simulation of the hollow space, there was plotted an analytical dependence of the surface pressure force on the parameters of the oncoming gas flow. The aircraft deflection caused by the presence of a spherical hollow space is estimated depending on its position, the initial speed of flight and the pitch attitude


Author(s):  
John H. Mott ◽  
Zachary A. Marshall ◽  
Mark A. Vandehey ◽  
Mike May ◽  
Darcy M. Bullock

Versatile unmanned aerial system (UAS) platforms have grown significantly in popularity by virtue of their low cost relative to manned aircraft, high performance, and operational simplicity. While the Federal Aviation Administration (FAA) currently regulates the operating altitudes, speeds, weights, pilot qualifications, and locations of drones, a lack of capacity and technology prohibits sufficient enforcement of these restrictions. To assess the frequency and severity of manned and unmanned aircraft separation incidents, and to examine the emerging sensor technology available to facilitate such assessment, flight operations in controlled airspace around Orlando Melbourne International Airport (KMLB) were monitored. One sensor system deployed at KMLB reported UAS locations, altitudes, and flight durations, while a second system reported manned aircraft positions, altitudes, and timestamps using ADS-B signals. Evaluation of flight operations data in the vicinity of KMLB revealed eight potential drone incursions over a 2-week period. Aircraft flight paths were retroactively tracked to map these unmanned and manned aerial conflicts; aircraft identification information was also researched to contextualize the incidents. The frequency and magnitude of identified events suggest the need for additional research to further explore the problem scope and potential solutions.


Author(s):  
Michael D. Zollars ◽  
Richard G. Cobb

The feasibility of using a constrained Delaunay triangulation method for determining optimal flight trajectories of unmanned air vehicles in a constrained environment is explored. Current methods for developing optimal flight trajectories have yet to achieve computational times that allow for real-time implementation. The proposed method alleviates the dependency of problem specific parameters while eliminating constraints on the Non-Linear Program. Given an input of obstacles with n vertices, a constrained Delaunay triangulation is performed on the space. Converting the vertices of the triangulation to barycentric coordinates on a phased approach defines the state bounds and max time for each phase. With two-dimensional aircraft dynamics, direct orthogonal collocation methods are performed to compute the optimal flight trajectory. Results illustrate computational times and feasibility of Small Unmanned Aircraft System flight trajectories through polygon constraints.


1974 ◽  
Vol 11 (8) ◽  
pp. 449-456 ◽  
Author(s):  
David L. Kohlman ◽  
Carl H. Brainerd

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