The present invention relates to systems and methods for providing air traffic control to aerial vehicles without a human pilot. In particular the present invention is related to transportation of unmanned aerial vehicles capable of autonomous flight and to autonomous air traffic control systems.
Air traffic control (ATC) is a service that monitors and directs manned aircrafts on the ground and through a controlled airspace using human air traffic controllers. This system has been implemented globally since 1920, and has since then been effective for transportation of aircrafts. To prevent collisions, a minimum amount of separation distance between the aircrafts is enforced. However, the monitoring of aircrafts' location is based on radar, which requires a very large amount of infrastructure that has been developed and deployed over the last century. Additionally, the range of radar technology is limited to up to 200 miles from the coast. In situations exceeding such range, air traffic controllers monitor aircrafts via radio communications with the pilot, which are subject to human error and can be slow. This contributes to location uncertainty, requiring an even larger separation between aircrafts to ensure safety.
In the case of an unmanned aerial vehicle also known as drone, which is an aircraft that can fly without a human pilot on-board, the most basic control approach consists on a human pilot sending commands to the UAV through a wireless communications link. This is sufficient for some limited purposes, but not enough if more than one UAV are required to be flown over the same airspace in a safe manner. For transportation of multiple UAVs, a different method that allows safe simultaneous flights within a shared airspace is required.
Some approaches for transportation of payload using drones have been proposed (for example, see U.S. Pat. Nos. 9,959,733 B2 and 9,489,852 B1). In those methods, a flight route is generated before takeoff and is followed by the drone during the entire flight. However, they lack the possibility to modify the route in flight and there is no way to monitor and verify that the flights are occurring as expected. Such approaches might be effective in specific situations where a very small number of drones widely spaced one from another are flown without any eventualities happening. However, in real life scenarios, a safe drone transportation system that enables transportation of a very large number of aerial vehicles must be able to deal with a dynamic and changing environment where eventualities can occur, such as natural disasters, aircraft failures, changes in transportation demand, or sudden changes of weather conditions. In such scenarios, a supervised air traffic control is required, similar to what ATC does, as described above.
Another approach that has been proposed consists on a system-only traffic management system as described in US. Pat. 2016/0275801 A1. This system is limited to the control of unmanned aerial systems (UAS) exclusively in uncontrolled airspace at low altitudes. Moreover, it is based on rules that the UAS follow to navigate in the uncontrolled airspace and detects the location of UAS via surveillance, using radars or cellular networks. In contrast, the system and method proposed herein can control UAVs in both controlled and un-controlled airspace at both low and high altitudes. Moreover, in-flight and grounded UAVs frequently obtain their location via satellite based navigation, which is then periodically transmitted to a computer-based traffic management system. This allows a very precise knowledge of the location of all UAVs, enabling a larger UAV capacity of the system and a larger safety than existing approaches.
Considering the existing prior art, there is a need for an autonomous air traffic control (AATC) system and method for drones and unmanned aerial vehicles that can leverage all the principles and advantages of conventional manned air traffic control but that is custom to the specific needs required for UAV operations. Moreover, there is a need for a safe, efficient and reliable air traffic control system for UAVs that exploits the latest technologies of navigation, communications and cloud computing to control automatically the flight of UAVs with minimal or without human intervention.
The invention disclosed herein includes a system and a method for controlling the air traffic and flight of multiple unmanned aerial vehicles in a safe, autonomous and efficient manner. To achieve this, the invention comprises the following components: a plurality of takeoff and landing stations, telecommunications infrastructure, a computer-based traffic management system, a plurality of unmanned aerial vehicles, a communications network and a plurality of airspace regions where the UAVs are flown. The telecommunications infrastructure enables bi-directional communications between the UAVs and the computer-based traffic management system. This way, UAVs can transmit their location and telemetry information to the traffic management system, which can track UAVs and know their exact current and future location in real-time. Moreover, flight plans, flight routes and flight parameters can be dynamically changed and communicated to individual UAVs, always ensuring a minimum safety separation between UAVs. This enables a safe and dynamic reconfiguration of the air traffic that can be adapted to different scenarios such as an increase in flight requests, change of weather conditions, or any kind of eventuality that might occur.
In contrast to the existing methods described in the section “BACKGROUND”, the invention disclosed herein can control UAVs in both controlled and un-controlled airspace at both low and high altitudes. Moreover, the periodic transmission of telemetry information from the UAVs to the computer-based traffic management system allows precise real-time monitoring of the location of all UAVs, enabling a larger UAV capacity and enhanced safety than existing approaches.
The invention disclosed herein is inspired by the principles of conventional manned air traffic control, but updated with the latest technologies of navigation, communications and cloud computing to control autonomously the flight of UAVs. This system allows air traffic control without or with minimal human intervention, it can operate inside and outside specifically designated airspace areas, it can operate safely and separated from commercial aviation and is compatible with existing uncontrolled operations such as helicopters used for emergency and rescue, light planes and hobbyists drones.
This AATC system enables new forms of transportation and air and delivery of goods in a fast, efficient and safe manner. It also enables safe multi-mission operations within a same shared airspace, with applications including and not limited to cargo delivery, transportation, search and rescue, mapping, surveillance, aerial photography, agriculture, entertainment, wildlife monitoring, mining, remote sensing, law enforcement, real state, infrastructure monitoring, construction monitoring and disaster assessment.
Non-limiting and non-exhaustive embodiments of the invention are described with reference to the following figures, wherein like reference numerals refer to like parts throughout the various views unless otherwise specified.
Embodiments of systems, devices and methods for autonomous air traffic control of unmanned aerial vehicles are described herein. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. One skilled in the art will recognize, however, that the techniques described herein can be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other words, well-know structures, materials or operations are not shown or describe in detail to avoid obscuring certain aspects.
The content of this disclosure may be applied to multiple fields, such as navigation, autonomous vehicles, air traffic control, autonomous air traffic control, aerial vehicles and unmanned aerial vehicles.
Reference throughout this specification to “one embodiment”, “an embodiment”, or “some embodiments” means that a particular feature, structure, or characteristic described may be included in at least one embodiment of the present invention, and each of these embodiments may be combined with other embodiments in accordance with the present disclosure. Thus, the appearances of the phrases “in one embodiment”, “in an embodiment”, or “in some embodiments” throughout this specification do not necessarily all refer to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. These embodiments and others will be described in more detail with references to
Throughout this specification, several terms of art are used. These terms are to take on their ordinary meaning in the art from which they come, unless specifically defined herein or the context of their use would clearly suggest otherwise. Also, like characters generally refer to like elements unless indicated otherwise. Some terms used in this specification and in the claims of this disclosure are defined in the “GLOSSARY” section.
Embodiments of this disclosure comprise a plurality of takeoff and landing stations 101, telecommunications infrastructure 102, a computer-based traffic management system 103, a plurality of unmanned aerial vehicles 104, a communications network 105, a plurality of airspace regions 106 where the UAVs are flown, a traffic control monitoring center 107 for human monitoring of the computer-based traffic management system and a satellite-based navigation system 108, as shown in
The telecommunications infrastructure 102 is the basis of the communications networks 105, shown in
The airspace regions 106 compound the three-dimensional space in which in-network UAVs are flown. Airspace regions can consist of dedicated volumetric regions authorized by governmental aviation authorities for exclusive or non-exclusive UAV operations, for example. It can also dynamically change in size and geographical extent. For instance, temporal access to new airspace regions can be requested and granted from government aviation authorities for certain UAV missions.
For flight maneuvers in places where UAVs have intermittent access or don't have access at all to precise satellite based navigation 108, such as near high rise buildings, the interior of a warehouse or in urban areas, the air traffic control system is compatible with ground-based UAV guidance systems and infrastructure. It can communicate with such systems to achieve precise control of the flight of UAVs specially in maneuvers such as approaching, takeoff and landing, for example.
The present invention also comprises at least one traffic control monitoring center 107 for human monitoring and control of the computer-based traffic management system. The traffic control monitoring center can display in real time flight information of all in-network UAVs. It also enables human intervention in the computer-based air traffic control system, which can accept commands from authenticated humans to re-direct the flight of one a plurality of UAVs in emergency situations, as a request of local aviation authorities or for any other reasonable circumstance. Communications between the traffic control monitoring center(s) and the computer-based traffic management system are strongly encrypted to ensure a safe and secure operation of the AATC.
Embodiments of the computer-based traffic management system 103 also comprise a database 109 for historical recording of data such as flight plans and telemetry information periodically received from each UAV. They also comprise a blockchain 110 for historical recording of part of the flight information that can be accessed and read by third parties that require information about flights. The information in the database can be encrypted, for example.
The invention also comprises a computer-based Artificial Intelligence (AI) system used for but not limited to at least one of the following processes: processing of trip requests, assignation of flight plans, collision likelihood mitigation, flight planning, airspace monitoring and generation of automated alert.
The AATC system includes emergency landing stations which can be located in rooftops or empty pieces of land, for example. They can be used in case of total or partial failure of any UAV subsystem, or in situations wherein destination take-off and landing stations are inaccessible due to a natural disaster such as an earthquake, tsunami, or flooding, for example. In the case of an emergency situation in which the UAV is not fully controllable, such as a severe bird strike, or a severe lightning, for example, the AATC can trigger the on-board parachute or, if aerodynamic control surfaces are still available, the AATC can attempt to glide or ballistically direct the UAV outside densely populated areas, for example.
Service stations are ground stations distributed over airspace regions designated for providing scheduled maintenance and/or reparation services to the UAVs. They can also be used to replace batteries or refuel UAVs in long flights.
The autonomous air traffic control and method disclosed herein can be used to control AUVs being used for different applications and missions as shown in
The above description of illustrated embodiments of the invention, including what is described in the “ABSTRACT”, is not intended to be exhaustive or to limit the invention to the precise forms disclosed. While specific embodiments of, and examples for, the invention are described herein for illustrative purposes, various modifications are possible within the scope of the invention, as those skilled in the relevant art will recognize.
These modifications can be made to the invention in light of the above detailed description. The terms used in the following claims should not be construed to limit the invention to the specific embodiments disclosed in the specification. Rather, the scope of the invention is to be determined entirely by the following claims, which are to be construed in accordance with established doctrines of claim interpretation.