Hover to Forward Flight Transition – Longitudinal Motion Feasibility Study of a Converted Long Endurance Fixed-Wing VTOL UAV

2021 ◽  
Author(s):  
Zairil Zaludin ◽  
Chen Chia ◽  
Ermira Abdullah
Keyword(s):  
Feasibility Study ◽  
Longitudinal Motion ◽  
Forward Flight ◽  
Vtol Uav ◽  
Long Endurance

scholarly journals An Annular Wing VTOL UAV: Flight Dynamics and Control

Drones ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 14 ◽  
Author(s):  
Rajan Gill ◽  
Raffaello D’Andrea
Keyword(s):  
Twist Angle ◽  
Forward Flight ◽  
Model Inversion ◽  
High Speeds ◽  
Oblique Flow ◽  
Vtol Uav ◽  
Dynamics And Control ◽  
Aerial Vehicle ◽  
Propeller Blades ◽  
And Control

A vertical takeoff and landing, unmanned aerial vehicle is presented that features a quadrotor design for propulsion and attitude stabilization, and an annular wing that provides lift in forward flight. The annular wing enhances human safety by enshrouding the propeller blades. Both the annular wing and the propulsion units are fully characterized in forward flight via wind tunnel experiments. An autonomous control system is synthesized that is based on model inversion, and accounts for the aerodynamics of the wing. It also accounts for the dominant aerodynamics of the propellers in forward flight, specifically the thrust and rotor torques when subject to oblique flow conditions. The attitude controller employed is tilt-prioritized, as the aerodynamics are invariant to the twist angle of the vehicle. Outdoor experiments are performed, resulting in accurate tracking of the reference position trajectories at high speeds.

Feasibility Study of the Development, Implementation, and Evaluation of Computer-Based Job and Occupational Data Collection Methods

1998 ◽  
Author(s):  
J. L. Mitchell ◽  
Winston Bennett ◽  
J. J. Weissmuller ◽  
R. L. Gosc ◽  
Patricia Waldroop ◽  
...  
Keyword(s):  
Data Collection ◽  
Feasibility Study ◽  
Data Collection Methods ◽  
Computer Based ◽  
Collection Methods

Getting better my way: Feasibility study of a self-management support tool for people with mood and anxiety disorders.

2019 ◽  
Vol 42 (2) ◽  
pp. 158-168
Author(s):  
Janie Houle ◽  
Stephanie Radziszewski ◽  
Préscilla Labelle ◽  
Simon Coulombe ◽  
Matthew Menear ◽  
...  
Keyword(s):  
Anxiety Disorders ◽  
Feasibility Study ◽  
Self Management ◽  
Management Support ◽  
Support Tool ◽  
Mood And Anxiety Disorders
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