Enhancement of power system transient stability using a novel adaptive backstepping control law

2015 ◽  
Author(s):  
Aritra Mitra ◽  
Mriganka Mukherjee ◽  
Kishankumar Naik
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Backstepping Control ◽  
Control Law ◽  
Adaptive Backstepping ◽  
Adaptive Backstepping Control

Non-linear flight control for unmanned aerial vehicles using adaptive backstepping based on invariant manifolds

2012 ◽  
Vol 227 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Jiaming Zhang ◽  
Qing Li ◽  
Nong Cheng ◽  
Bin Liang
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Invariant Manifolds ◽  
Backstepping Control ◽  
Linear Estimator ◽  
Control Law ◽  
Adaptive Backstepping ◽  
Adaptive Backstepping Control ◽  
Aerial Vehicles ◽  
Non Linear ◽  
Aerodynamic Parameters

A novel adaptive backstepping control scheme based on invariant manifolds for unmanned aerial vehicles in the presence of some uncertainties in the aerodynamic coefficients is presented in this article. This scheme is used for command tracking of the angle of attack, the sideslip angle, and the bank angle of the aircraft. The control law has a modular structure, which consists of a control module and a recently developed non-linear estimator. The estimator is based on invariant manifolds, which allows for prescribed dynamics to be assigned to the estimation error. The adaptive backstepping control law combined with the estimator covers the entire flight envelope and does not require accurate aerodynamic parameters. The stability of the whole closed-loop system is analyzed using the Lyapunov stability theory. The full six-degree-of-freedom non-linear model of a small unmanned aerial vehicle is used to demonstrate the effectiveness of the proposed control law. The numerical simulation result shows that this method can yield satisfying command tracking despite some unknown aerodynamic parameters.

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