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—We present in this paper the modeling and flight-control-system design for the yaw channel of an unmanned-aerial-vehicle (UAV) helicopter using a newly developed composite nonlinear feedback (CNF)-control technique. The CNF-control method has been proven to be capable of yielding a fast transient response with no or very minimal overshoot in tracking a(More)
In this paper, we present the design and implementation of an autonomous flight control law for a small-scale unmanned aerial vehicle (UAV) helicopter. The approach is decentralized in nature by incorporating a newly developed nonlinear control technique, namely the composite nonlinear feedback control, together with dynamic inversion. The overall control(More)
This work proposes an overall behavior-based control scheme for unmanned aerial vehicles (UAVs), from concept to implementation. Task plan, event disposal and vehicle-user cooperation are integrated in the architecture. The work is of three parts: first, basic issues for behavior-based architecture are discussed, including definition of behaviors, behavior(More)
In this paper, we present a comprehensive design for a fully functional unmanned rotorcraft system: GremLion. GremLion is a new small-scale unmanned aerial vehicle (UAV) concept using two contra-rotating rotors and one cyclic swash-plate. It can fit within a rucksack and be easily carried by a single person. GremLion is developed with all necessary avionics(More)
In this paper, we present an unmanned system design methodology for a fully functional unmanned rotorcraft system: GremLion, developed with all necessary avionics and a ground control station. It has been employed to participate in the 2012 UAVForge competition. The proposed design methodology consists of hardware construction, software development, dynamic(More)
We present in this paper a comprehensive software system architecture for unmanned aerial vehicles. More specifically, a top-down divide and conquer method is utilized in developing the logical representation of the overall system, with standard professional approaches, such as data flow diagram and task structure diagram. The overall system consisting of(More)
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