A Review on Challenges and Threats to Unmanned Aerial Vehicles (UAVs)

Basha, Shaik Johny; Danda, Jagan Mohan Reddy

doi:10.1002/9781119769170.ch5

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…These types of UAVs are usually designed for long-range and long-endurance missions that often require all-weather capabilities. Example applications for such UAVs are remote sensing in cold climates, ship-based iceberg detection, oil spill response, or search & rescue [2]. Today, there is no mature icing protection system available for this category of UAVs.…”

Section: Introductionmentioning

confidence: 99%

UAV Icing: Ice Accretion Experiments and Validation

Hann¹

2019

SAE Technical Paper Series

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Atmospheric icing is a key challenge to the operational envelope of medium-sized fixed-wing UAVs. Today, several numeric icing codes exist, that all have been developed for general aviation applications. UAVs with wingspans of several meters typically operate at Reynolds numbers an order of magnitude lower than commercial and military aircraft. Therefore, the question arises to what extent the existing codes can be applied for low-Reynolds UAV applications to predict ice accretion. This paper describes an experimental campaign at the Cranfield icing wind tunnel on a RG-15 and a NREL S826 airfoil at low velocities (25-40m/s). Three meteorological icing conditions have been selected to represent the main ice typologies: rime, glaze, and mixed ice. Each case has been run at least twice in order to assess the repeatability of the experiments. Manual ice shape tracings have been taken at three spanwise locations for each icing case. The liquid water content calibration was performed according to ARP5905 using the icing blade method. The tests have initially shown significantly higher water contents than anticipated, which could be traced to dimensional differences of the blade at Cranfield, as well as low flow velocities. This systematic error was resolved by simulating the droplet collection coefficients on the off-specification blade. In addition to manual tracings, photogrammetry and a handheld laser-scanner were used to capture the ice shapes. The results indicate that manual tracings are still the most efficient method, although there is potential in exploring the alternatives further. Additionally, numerical simulations with two icing codes, LEWICE and FENSAP-ICE, were performed on a rime and a glaze case. For rime, the simulations show a good agreement with the experiment, whereas the glaze case exhibits significant differences.

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Section: Introductionmentioning

confidence: 99%

UAV Icing: Ice Accretion Experiments and Validation

Hann¹

2019

SAE Technical Paper Series

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“…Typical flight environments include cities, suburbs, mountains, and indoor environments. In different flight environments, the density and relative distance of obstacles are different, and the meteorological conditions and interference information in the environment are also different 10 . The prior information in the environment must be considered in configuration.…”

Section: Flight Environmentmentioning

confidence: 99%

Overview of image fusion technology for low-cost UAVs perception system

Luo¹,

Bi²,

Xuan³

2023

Advanced Fiber Laser Conference (AFL2022)

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With the gradual improvement of the autonomous capabilities of unmanned aerial vehicles (UAVs), the field of tasks has expanded, and it is necessary for UAVs to fully perceive target information from multiple levels and dimensions in the process of target detection and identification in the complex environment. Therefore, for UAVs, the main goal of fusion perception technology is to achieve resource interoperability and information complementarity between sensors, such as to increase the detection advantages of different image sensors in frequency, space, and time.In this paper, based on low-cost UAVs, the research is carried out from two aspects: UAVs and fusion perception sensors, and image-based fusion perception technology. The factors that need to be considered in UAVs' sensor configuration are analyzed from four aspects: UAVs' platform attributes, sensor attributes, flight environment, and task types and requirements. Then, we summarize the current image fusion perception technology in the process of UAVs' detection and identification, which provides an effective reference for product development and technology research in related fields.Finally, the challenges faced by the future development of fusion technology are proposed. The overview shows that, sensor configuration scheme and information fusion scheme have the relationship of mutual promotion and restriction in the process of searching for the optimal fusion strategy. It is necessary to develop heterogeneous information fusion algorithm based on sensor characteristics. Moreover, the level of precise sensing elements, efficient information acquisition algorithms, configuration schemes and fusion algorithm implementations are required to improve for the result of 1+1>2.

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Remote sensing of the environment using unmanned aerial systems

Manfreda

Dor

2023

Unmanned Aerial Systems for Monitoring Soil, Vegetation, and Riverine Environments

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A Review on Challenges and Threats to Unmanned Aerial Vehicles (UAVs)

Cited by 7 publications

References 20 publications

UAV Icing: Ice Accretion Experiments and Validation

UAV Icing: Ice Accretion Experiments and Validation

Overview of image fusion technology for low-cost UAVs perception system

Remote sensing of the environment using unmanned aerial systems

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