scholarly journals Methodology for Combining Data Acquired by Unmanned Surface and Aerial Vehicles to Create Digital Bathymetric Models in Shallow and Ultra-Shallow Waters

2021 ◽  
Vol 14 (1) ◽  
pp. 105
Author(s):  
Jacek Lubczonek ◽  
Witold Kazimierski ◽  
Grzegorz Zaniewicz ◽  
Malgorzata Lacka
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Shallow Waters ◽  
Data Sets ◽  
Reference Surface ◽  
Unmanned Surface Vehicles ◽  
Bathymetric Data ◽  
Aerial Vehicles ◽  
Combining Data ◽  
Photogrammetric Method ◽  
Selection Of

This paper presents a method for integrating data acquired by unmanned surface vehicles and unmanned aerial vehicles. The aim of this work was to create a uniform bathymetric surface extending to the shoreline. Such a body of water is usually characterized by ultra-shallow depths, which makes measurement impossible even with hydrographic autonomous vessels. Bathymetric data acquired by the photogrammetric method are, however, characterized by large errors with increasing depth. The presented method is based on processing of two data sets using a bathymetric reference surface and selection of points on the basis of generated masks. Numerical bathymetric models created by interpolation methods confirmed the usefulness of the concept adopted.

scholarly journals Digitalización automática del patrimonio arqueológico a partir de fotogrametría

2015 ◽  
Vol 4 (8) ◽  
pp. 46 ◽  
Author(s):  
Pedro Ortiz Coder
Keyword(s):  
Computer Vision ◽  
Unmanned Aerial Vehicles ◽  
Laser Scanner ◽  
Archaeological Site ◽  
New Techniques ◽  
Aerial Vehicles ◽  
Photogrammetric Method

<p>New techniques in graphical heritage documentation have been improving recently. Modern photogrammetry and laser scanner constitute techniques with a good quality for those purposes. In this document, we will explain an easy photogrammetric method which permits to obtain accurate results. It is important to separate it from other methods based on computer vision with less accuracy. 4e photogrammetry solution is applied in this test through pictures taken from UAV (Unmanned Aerial Vehicles) and used on an archaeological site in Extremadura.</p>

scholarly journals Selection of Unmanned Aerial Vehicles by Using Multicriteria Decision-Making for Defence

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Mustafa Hamurcu ◽  
Tamer Eren
Keyword(s):  
Decision Making ◽  
Unmanned Aerial Vehicles ◽  
Selection Process ◽  
Critical Role ◽  
Multicriteria Decision Making ◽  
Critical Factor ◽  
Unmanned Systems ◽  
Multicriteria Decision ◽  
Aerial Vehicles ◽  
Selection Of

The unmanned systems have been seeing a significant boom in the last ten years in different areas together with technological developments. One of the unmanned systems is unmanned aerial vehicles (UAVs). UAVs are used for reconnaissance and observation in the military areas and play critical role in attack and destroy missions. These vehicles have been winning more features together with developing technology in todays world. In addition, they have been varying with different features. A systematic and efficient approach for the selection of the UAV is necessary to choose a best alternative for the critical tasks under consideration. The multicriteria decision-making (MCDM) approaches that are analytic processes are well suited to deal intricacy in selection of alternative vehicles. This study also proposes an integrated methodology based on the analytic hierarch process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS) to evaluate UAV alternatives for selection process. Firstly, AHP, a MCDM method, is used to determine the weights of each critical factor. Subsequently, it is utilized with the TOPSIS approach to rank the vehicle alternatives in the decision problem. Result of the study shows that UAV-1 was selected as the most suitable vehicle. In results, it is seen that the weights of the evaluation criteria found by using AHP affect the decision-making process. Finally, the validation and sensitivity analysis of the solution are made and discussed.

scholarly journals APPLICATION OF MODERN TECHNICAL AND SOFTWARE MEANS IN THE CONDITIONS OF FORMATION OF THE DIGITAL ECONOMY OF THE RUSSIAN FEDERATION

2020 ◽  
Vol 7 (2) ◽  
pp. 66-70
Author(s):  
Olga A. Opritova ◽  
Alexandr A. Antonov ◽  
Polina E. Ivanenko
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Russian Federation ◽  
Digital Economy ◽  
Aerial Vehicles ◽  
Photogrammetric Method ◽  
The Russian Federation ◽  
Software And Hardware

The article presents a method of using modern software and hardware in various fields and fields of activity. The definition and prospects of the development of the photogrammetric method in cadastral activities, as well as the possibility of using unmanned aerial vehicles and cloud platforms are given.

scholarly journals Pareto Optimal PID Tuning for Px4-Based Unmanned Aerial Vehicles by Using a Multi-Objective Particle Swarm Optimization Algorithm

Aerospace ◽  
2020 ◽  
Vol 7 (6) ◽  
pp. 71
Author(s):  
Victor Gomez ◽  
Nicolas Gomez ◽  
Jorge Rodas ◽  
Enrique Paiva ◽  
Maarouf Saad ◽  
...  
Keyword(s):  
Particle Swarm Optimization ◽  
Unmanned Aerial Vehicles ◽  
Particle Swarm ◽  
Swarm Optimization ◽  
Multi Objective ◽  
Pid Tuning ◽  
Aerial Vehicles ◽  
The Stability ◽  
Selection Of

Unmanned aerial vehicles (UAVs) are affordable these days. For that reason, there are currently examples of the use of UAVs in recreational, professional and research applications. Most of the commercial UAVs use Px4 for their operating system. Even though Px4 allows one to change the flight controller structure, the proportional-integral-derivative (PID) format is still by far the most popular choice. A selection of the PID controller parameters is required before the UAV can be used. Although there are guidelines for the design of PID parameters, they do not guarantee the stability of the UAV, which in many cases, leads to collisions involving the UAV during the calibration process. In this paper, an offline tuning procedure based on the multi-objective particle swarm optimization (MOPSO) algorithm for the attitude and altitude control of a Px4-based UAV is proposed. A Pareto dominance concept is used for the MOPSO to find values for the PID comparing parameters of step responses (overshoot, rise time and root-mean-square). Experimental results are provided to validate the proposed tuning procedure by using a quadrotor as a case study.

The Use of Unmanned Aerial Vehicles (UAVs) in Slope Stability Assessment

2018 ◽  
Author(s):  
Connor Meeks
Keyword(s):  
Unmanned Aerial Vehicles ◽  
3D Model ◽  
Complex Geometry ◽  
Data Sets ◽  
Current Standard ◽  
Surface Areas ◽  
Helicopter Flight ◽  
Aerial Vehicles ◽  
Detailed Application

The use and applications of unmanned aerial vehicles (UAVs) in geotechnical engineering is rapidly growing, leading to changes in the way that data is acquired, analyzed and processed. UAVs can reach areas previously inaccessible via ground or helicopter, while also being quickly deployed. Cameras are the current standard for data collection and 3D model creation. There are multiple types of UAV’s currently available. Quadcopters can take off and land in spatially constrained areas, but carry a small stabilized camera producing low quality models. Octocopters permit an increased payload, so a higher quality camera can be attached, allowing for increased model accuracy. Flight time is reduced by the additional weight. Fixed wing UAVs create higher quality photogrammetry models, and are commonly deployed over large surface areas. Transport Canada certification must be approved prior to any flights occurring for research or work. A detailed application must be created, including a flight plan and demonstration of prior flight experience. At the White Canyon site in B.C., a Phantom 4 Quadcopter was flown for geotechnical analysis of a complex geometry slope, which has previously been studied for several years. The terrain has occluded the data available from the ground or from permissible helicopter flight paths. Therefore, detailed information from the slope has not been previously available. The process of using a UAV to obtain these data sets, to develop a full 3D model of these areas of the slope is discussed, considering the accuracy and quality of the data available.

A proposed reference framework for unmanned aerial vehicle and system airworthiness requirements

2007 ◽  
Vol 111 (1120) ◽  
pp. 345-358
Author(s):  
A. Maneschijn ◽  
T. Jones ◽  
T. W. von Backström ◽  
L. A. Ingham
Keyword(s):  
Unmanned Aerial Vehicles ◽  
South African ◽  
Unmanned Aerial Vehicle ◽  
Launch Vehicles ◽  
Functional Requirements ◽  
Reusable Launch Vehicles ◽  
Reference Framework ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
Selection Of

Abstract Various programmes are underway internationally to establish legislative instruments for regulating civil and military unmanned aerial vehicles and systems. An analysis of a selection of these programmes revealed that the approaches used for airworthiness regulation are not harmonised and are usually limited to specific unmanned aerial vehicle types, indicating the need for a generic framework for airworthiness requirements. A functional Reference Framework for unmanned aerial vehicle and system airworthiness requirements was developed using Annex 8 of the Chicago Convention as a reference basis, supplemented with airworthiness procedures and functional requirements derived from manned aircraft regulations, unmanned aerial vehicle and system airworthiness material, and flightworthiness guidelines for reusable launch vehicles. Various airworthiness elements were identified for which further research is required to develop appropriate airworthiness requirements. This paper summarises the development of the framework and proposes the Reference Framework as a functional basis for generating comprehensive South African civil and military airworthiness requirements for unmanned aerial vehicles and systems.

PATENTS ON WARHEADS OF UNMANNED AERIAL VEHICLES

2017 ◽  
pp. 41-52
Author(s):  
Maciej Miszczak
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Subject Matter ◽  
Foreign Patent ◽  
Aerial Vehicles ◽  
The Status ◽  
The Subject ◽  
Selection Of

The paper presents results of scrutinising through foreign patent publications on warheads integrated in wing unmanned aerial vehicles (UAV) concerning especially the types and designs of warheads and their location against the onboard systems of recognition and target guidance and also against the systems controlling the status and operation of warheads. The review and analysis of patent publications was completed by a selection of patent descriptions [2-11] of 10 inventions on the subject matter committed in Israel, Germany, USA and UK between 1979 and 2011.

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