This letter presents the modeling, system identification and nonlinear model predictive control (NMPC) design for longitudinal, full envelope velocity of a small tiltwing hybrid unmanned aerial vehicle (H-UAV). A first-principles based dynamics is derived identified from flight data. It captures important aerodynamic effects including propeller-wing interaction stalled airfoils, but still simpl...

Vertical takeoff and landing (VTOL) capability has extended the application of unmanned aerial vehicle (UAV) significantly. In this paper, simulation modeling flight test were employed to investigate hovering stability a tail-sitter UAV named Egretta. The model was developed based on simplified rigid body dynamic time-averaged propeller slipstream flow distribution. Meanwhile, testing with PID ...

The aerodynamic design and analysis of an Unmanned Air Vehicle, capable vertical take-off landing by employing fixed four rotors on the tilt-wing two tilt-tail, will be presented in this study. Both main wing horizontal tail can tilted 90°. During VTOL, transition forward flight, thrust forces have been employed. Different flight conditions, including effects angle attack, side slip, tilt contr...

In this paper, a new Computer Aided Design (CAD) methodology for the Processor-In-the-Loop (PIL) cosimulation and Rapid Control Prototyping (RCP) of a Quadrotor Vertical Take-Off and Landing (VTOL) type of Unmanned Arial Vehicle (UAV) is proposed and successfully implemented around an embedded NI myRIO-1900 target and a host PC. The developed software (SW) and hardware (HW) prototyping platform...

There is a critical need to improve the performance and utility of unmanned aerial vehicles (UAVs). Several areas of UAV performance need to be improved for the next generation of UAVS to be used successfully in expanded future combat roles. For example current time aloft is only on the order of an hour or two for electric-powered UAVs. The current generation of UAVs lacks vertical takeoff and ...

With the increasing popularity of vertical take-off and landing unmanned aerial vehicles (VTOL UAVs), a new problem arises: pilot training. Most conventional training simulators are designed for full-scale aircrafts, while most UAV just focused on conceptual testing design validation. The X-Plane flight simulator was extended to include functionalities such as complex wind dynamics, ground effe...

In this paper, a fractional order flight controller design scheme for the altitude control of vertical take-off and landing (VTOL) UAV is presented. The altitude control system can be decoupled and identified as a simple first order plus time delay model under some constraints. Based on this identified model, the traditional modified Ziegler-Nichols PI controller can be designed. Meanwhile, the...