Review of designs and flight control techniques of hybrid and convertible VTOL UAVs

GJJ Ducard, M Allenspach - Aerospace Science and Technology, 2021 - Elsevier
This paper provides a broad perspective and analysis of the work done in control of hybrid
and convertible unmanned aerial vehicles (UAVs) for the main existing designs. These flying …

Command filtered adaptive backstepping

W Dong, JA Farrell, MM Polycarpou… - … on Control Systems …, 2011 - ieeexplore.ieee.org
Implementation of adaptive backstepping controllers requires analytic calculation of the
partial derivatives of certain stabilizing functions. It is well documented that, as the order of a …

Design and analysis of a novel l1 adaptive controller, part i: control signal and asymptotic stability

C Cao, N Hovakimyan - 2006 American Control Conference, 2006 - ieeexplore.ieee.org
In this paper, we develop a novel adaptive control architecture that ensures that the input
and output of an uncertain linear system track the input and output of a desired linear system …

Adaptive force-based control of dynamic legged locomotion over uneven terrain

M Sombolestan, Q Nguyen - IEEE Transactions on Robotics, 2024 - ieeexplore.ieee.org
Agile-legged robots have proven to be highly effective in navigating and performing tasks in
complex and challenging environments, including disaster zones and industrial settings …

L1 adaptive control design for NASA AirSTAR flight test vehicle

I Gregory, C Cao, E Xargay, N Hovakimyan… - … , navigation, and control …, 2009 - arc.aiaa.org
In this paper we present an extension of the L1 adaptive control architecture to nonlinear
systems in the presence of significant uncertain cross-coupling. To evaluate the L1 adaptive …

Certification considerations for adaptive systems

S Bhattacharyya, D Cofer, D Musliner… - 2015 International …, 2015 - ieeexplore.ieee.org
Advanced capabilities planned for the next generation of unmanned aircraft will be based on
complex new algorithms and non-traditional software elements. These aircraft will …

Guaranteed transient performance with L1 adaptive controller for systems with unknown time-varying parameters and bounded disturbances: Part I

C Cao, N Hovakimyan - 2007 American Control Conference, 2007 - ieeexplore.ieee.org
This paper presents a novel adaptive control methodology for uncertain systems with time-
varying unknown parameters and time-varying bounded disturbances. The adaptive …

Development and application of controller for transition flight of tail-sitter UAV

Y Jung, DH Shim - Journal of Intelligent & Robotic Systems, 2012 - Springer
There is renewed interest in tail-sitter airplanes on account of their vertical takeoff and
landing capability as well as their efficient horizontal flight capabilities. The transition from a …

Evolution of flying qualities analysis: Problems for a new generation of aircraft

MC Cotting - 2010 - vtechworks.lib.vt.edu
A number of challenges in the development and application of flying qualities criteria for
modern aircraft are addressed in this dissertation. The history of flying qualities is traced …

Adaptive Output Feedback Controller for Systems of Unknown Dimension

C Cao, N Hovakimyan - IEEE Transactions on Automatic …, 2008 - ieeexplore.ieee.org
This note presents novel adaptive output feedback control methodology for systems of
unknown dimension in the presence of unmodeled dynamics and time-varying uncertainties …