scholarly journals Rationale Approach to the Construction of the System Selection of Moving Targets the Radar to Detect Small Unmanned Aerial Vehicles

2019 ◽  
pp. 780-791 ◽  
Author(s):  
Victor V. Abramenkov ◽  
Oleg V. Vasilchenko ◽  
Andrei P. Muravskiy
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Correlation Matrix ◽  
Compensation Point ◽  
Moving Targets ◽  
Direct Treatment ◽  
Aerial Vehicles ◽  
Small Uav ◽  
Passive Noise ◽  
System Selection ◽  
Selection Of

This paper discusses the detection and measurement of small UAV radar reconnaissance. Analyzed modern directions of improvement of MTI systems. Based on the method of compensation proposed deterministic sdts providing suppression of passive noise in the area of rejectio on the principle of close to compensation point in space jamming (ACP) autocompensation direct treatment of the correlation matrix of the interference

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.

In-Flight Detection of Vibration Anomalies in Unmanned Aerial Vehicles

2020 ◽  
Vol 3 (4) ◽  
Author(s):  
Portia Banerjee ◽  
Wendy A. Okolo ◽  
Andrew J. Moore
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Promising Technique ◽  
Bearing Faults ◽  
Vibration Sensors ◽  
Aerial Vehicles ◽  
Flight Operations ◽  
Small Uav ◽  
Close Proximity ◽  
Identification And Characterization

Abstract Owing to the frequency of occurrence and high risk associated with bearings, identification, and characterization of bearing faults in motors via nondestructive evaluation (NDE) methods have been studied extensively, among which vibration analysis has been found to be a promising technique for early diagnosis of anomalies. However, a majority of the existing techniques rely on vibration sensors attached onto or in close proximity to the motor in order to collect signals with a relatively high SNR. Due to weight and space restrictions, these techniques cannot be used in unmanned aerial vehicles (UAVs), especially during flight operations since accelerometers cannot be attached onto motors in small UAVs. Small UAVs are often subjected to vibrational disturbances caused by multiple factors such as weather turbulence, propeller imbalance, or bearing faults. Such anomalies may not only pose risks to UAV’s internal circuitry, components, or payload, they may also generate undesirable noise level particularly for UAVs expected to fly in low-altitudes or urban canyon. This paper presents a detailed discussion of challenges in in-flight detection of bearing failure in UAVs using existing approaches and offers potential solutions to detect overall vibration anomalies in small UAV operations based on IMU data.

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.

scholarly journals Real-Time UAV Autonomous Localization Based on Smartphone Sensors

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4161 ◽  
Author(s):  
Boxin Zhao ◽  
Xiaolong Chen ◽  
Xiaolin Zhao ◽  
Jun Jiang ◽  
Jiahua Wei
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Real Time ◽  
Indoor Environment ◽  
Light Weight ◽  
Localization Method ◽  
Accurate Localization ◽  
Aerial Vehicles ◽  
Small Uav ◽  
Smartphone Sensors ◽  
Indoor And Outdoor

Localization in GPS-denied environments has become a bottleneck problem for small unmanned aerial vehicles (UAVs). Smartphones equipped with multi-sensors and multi-core processors provide a choice advantage for small UAVs for their high integration and light weight. However, the built-in phone sensor has low accuracy and the phone storage and computing resources are limited, which make the traditional localization methods unable to be readily converted to smartphone-based ones. The paper aims at exploring the feasibility of the phone sensors, and presenting a real-time, less memory autonomous localization method based on the phone sensors, so that the combination of “small UAV+smartphone” can operate in GPS-denied areas regardless of the overload problem. Indoor and outdoor flight experiments are carried out, respectively, based on an off-the-shelf smartphone and a XAircraft 650 quad-rotor platform. The results show that the precision performance of the phone sensors and real-time accurate localization in indoor environment is possible.

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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