Well-Clear Recommendation for Small Unmanned Aircraft Systems Based on Unmitigated Collision Risk

Weinert, Andrew; Campbell, Scot E.; Vela, Adan; Schuldt, Dieter; Kurucar, Joel

doi:10.2514/1.d0091

Cited by 71 publications

(54 citation statements)

References 22 publications

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“…In average, the described scheme allows to get position updates every 95 ms when the drones are separated by 100 m distance. This is enough even for collision avoidance purposes (it corresponds to 0.95 m of traveled distance for 10 m/s -an average cruise speed of rotary UAVs reported in [9]). The delay between updates grows as the inter-UAV distance increases (see Figure 8) due to the channel influence.…”

Section: B Case Study 1: Ads-b Like Messaging Via Wi-fimentioning

confidence: 99%

Wireless Communication for Safe UAVs: From Long-Range Deconfliction to Short-Range Collision Avoidance

Vinogradov

Minucci

Pollin

2020

IEEE Veh. Technol. Mag.

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Small drones are becoming a part of our everyday life. They are used in a wide variety of commercial applications, and the number of drones in the air is steadily growing. To ensure the safe operation of drones, traffic management rules must be designed and implemented by avionics and telecommunication experts. In this article, we propose to establish a common terminology for these two communities. We first describe the traffic management architecture and services. Next, we overview several approaches for defining the inter-drone separation distances ensuring the safe operation. Moreover, we analyze which existing technologies can be useful for each of these definitions. Finally, we present measurement results indicating that our new Wi-Fibased messaging scheme is a potentially useful tool for the drone traffic management system.

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Section: B Case Study 1: Ads-b Like Messaging Via Wi-fimentioning

confidence: 99%

Wireless Communication for Safe UAVs: From Long-Range Deconfliction to Short-Range Collision Avoidance

Vinogradov

Minucci

Pollin

2020

IEEE Veh. Technol. Mag.

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“…If the drones are 1 km apart, they are going to collide within 50 s. This means that in less than one minute the two UAVs have to detect each other, and perform a manoeuvre to avoid the crash. A more rigorous study of the safety separation distance between drones is given in [13]: the authors explicitly compute wellclear distance recommendations for different kind of drones, how to assess the risk of collision and prove their claims with simulation results.…”

Section: A Problem Statementmentioning

confidence: 99%

Avoiding Collisions at Any (Low) Cost: ADS-B Like Position Broadcast for UAVs

2020

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Unmanned Aerial Vehicles (UAVs), a.k.a. drones, are increasingly used for different tasks. With more drones in the sky, the risk of accidents rises, sparking the need for conflict management solutions. Aircraft use a system called Automatic Dependent System-Broadcast (ADS-B) to continuously broadcast their position and speed but this system is not suitable for small drones because of its cost, complexity and capacity limitations. Broadband technologies such as Wi-Fi beacons are more suited for such dense scenarios, and they also offer the benefit of wide availability and low cost. The main challenges for Wi-Fi are (a) the multichannel nature of the technology makes transmitter and receiver coordination difficult, and (b) standard chipsets are not designed for frequent broadcast transmission and reception. In this paper, we propose and analyse a multichannel position broadcast solution that is robust against jamming and achieves a reliable location update within 125 ms. In addition, we implement the protocol on inexpensive embedded Wi-Fi modules and analyse the hardware limitations of such devices. Our conclusions are that, even on the simplest Wi-Fi chipsets, our protocol can be implemented to achieve a realistic location broadcast solution that still perfectly mimics simulation and analytical results on the lab bench and still can achieve approximately 4 message/s throughput at a distance of 900 m on flying UAVs.

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“…The most important problem is collision avoidance [26]. In [27], the safety of clear definitions of UAV group control was evaluated in an analytical way that is characteristic of the dynamics and concept of operations. Data was collected and processed, including for operations with low altitudes.…”

Section: Group Management Security Issuesmentioning

confidence: 99%

The Use of UAVs to Save People in the Mountains: Tasks, Problems, Perspective

Romanova

2020

ITM Web Conf.

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The actual problem of organizing and conducting rescue operations in the mountains is considered. The achievements associated with the following factors were noted: the active development of UAVs of various designs, masses, and equipment; development of new information systems, including sensors, communication systems; the emergence of new image processing algorithms and other types of data based on artificial intelligence methods. It was emphasized that a fundamentally new achievement that opens up broad prospects is an integrated approach to the use of rescue equipment, including ground-based mobile equipment, UAVs of various types, global navigation and mobile communications, and professional rescuers. Problems were identified that are associated with the difficulties of the task, including a complex mountainous terrain, snow cover, avalanches, strong winds, low temperatures, immobility and even lack of communication with the victims. The article considers the problem of low temperatures, which leads to icing, which gives rise to an uncontrolled change in the properties of the control object UAVs, difficulties in the functioning of control elements, and distortion of the sensors. Based on the methods of artificial intelligence, including modern methods of detecting damage, a comparative analysis of different approaches was carried out and a predominant approach was drawn, which allows a high degree of certainty to detect problems of UAV icing and timely change of control system settings.

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Well-Clear Recommendation for Small Unmanned Aircraft Systems Based on Unmitigated Collision Risk

Cited by 71 publications

References 22 publications

Wireless Communication for Safe UAVs: From Long-Range Deconfliction to Short-Range Collision Avoidance

Wireless Communication for Safe UAVs: From Long-Range Deconfliction to Short-Range Collision Avoidance

Avoiding Collisions at Any (Low) Cost: ADS-B Like Position Broadcast for UAVs

The Use of UAVs to Save People in the Mountains: Tasks, Problems, Perspective

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