An unmanned aircraft system (UAS) consists of an aerial vehicle (UAV) and its controller, which use radios to communicate. While the remote controller (RC) is traditionally operated by a person who maintaining visual line sight with UAV it controls, trend moving toward long-range control autonomous operation. To enable this, reliable widely available wireless connectivity needed because only wa...

The Traffic Alert and Collision Avoidance System (TCAS) is a family of airborne systems designed to reduce the risk of mid-air collisions between aircraft. TCAS II, the current generation of TCAS devices, provides resolution advisories that direct pilots to maintain or increase vertical separation when aircraft distance and time parameters are beyond designed system thresholds. This paper prese...

In integrating Unmanned Aircraft Systems (UAS) into the National Airspace System, separation assurance is one of the important air traffic services for ensuring safe operations of air traffic. This paper describes an approach to develop a range of operational concepts by describing what functions and technologies are required to maintain safe separation of unmanned aircraft and how those functi...

The legal regulation, and hence, the training system in field of unmanned aircraft systems (UAS) Russian Federation, European Union United States is based on aerial vehicles (UAV) rating with respect to UAS maximum take-off weight (MTOW) their purpose (method use). In this regard, small-unmanned (sUAS) are identified – our country up 30 kg, EU USA 55 lbs (25 kg) UAV larger weight. Europe, remot...

Guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. In this study automatic landing control systems are introduced and an optimal landing control system is designed. The control system performance criteria are based on minimum control effort. The designed system is simulated for a tr...

This paper addresses autonomous aerial refueling between an unmanned tanker aircraft and an unmanned receiver aircraft using the probe-and-drogue method. An important consideration is the ability to achieve successful docking in the presence of exogenous inputs such as atmospheric turbulence. Practical probe and drogue autonomous aerial refueling requires a reliable sensor capable of providing ...

Future Unmanned Aircraft Systems (UASs) are expected to be nearly autonomous and composed of heterogeneous Unmanned Aerial Vehicles (UAVs). While most of the current research focuses on UAV avionics and control algorithms, ground task automation has come to the attention of researchers during the past few years. Ground task automation not only relieves This paper is largely reprinted from the p...

This paper summarizes background fundamentals of unmanned aircraft systems (UAS) as related to terminology and diverse applications. This information is followed by a discussion on the challenges that need to be overcome in order to take full advantage of what UAS may offer, focusing on control system design, autonomy and cooperation. A UAS simulator currently under development at the Technical...