The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Autogyro or gyroplane as the first rotorcraft and a type of classical V/STOL aerial vehicle has become a hot point in academia and industry. Progresses have been achieved in many research areas such as aerodynamics, structure, flight dynamics, modeling identification. But a sparse contemporary research on autogyro emphasizes the control of autogyro/gyroplane. Our motivation is to design an autopilot...
Gyroplane is becoming popular these days for its characters of security, reliable and simple operation. Modeling is the first step that put mathematical theory into engineering studies such as aircraft stability, control and handling qualities. Considering the variable rotoring speed, propeller, tail aero forces and moment, this paper explores the mathematical model of an unmanned mode gyroplane based...
The ability to transition between vertical and horizontal flight is of great importance to convertible unmanned aerial vehicles. A novel convertible UAV-a Quad Tilt Rotor UAV (QTR UAV) was designed, which could operate as a quad rotor as well as an airplane by means of transition maneuver. This paper focuses on the trajectory tracking control for the hovering mode and acceleration maneuver which is...
Focusing on the transitional mode of tiltrotor UAV, which is nonlinear, strongly coupled and uncertain due to its complexity in layout, structure and aerodynamic peculiarity, a control strategy is designed and proposed. First, considering of the aerodynamics of rotor and its tilt machinery, the mathematic model of this kind of UAV is presented. Then, the reasonable anticipant global trajectory is...
Focusing on the control system of convertible UAV, which is nonlinear, strongly coupled and uncertain due to its complexity in layout, structure and aerodynamic peculiarity, a kind of control method based on extended-state-observer (ESO) is proposed. First, the dynamic model inversion technique based on reference model tracking is applied to linearize the object and eliminate the coupled factors....
It is necessary to investigate the lunar lander soft-landing by considering the flexible body and legs because the impact of deformation is significant. There is a new method for research on landing impact performance in this paper. Firstly a dynamical model of 1/4 lunar lander with four suspension legs is build and simplified. After getting oscillation equation of the model, founds two simulation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.