NDLI: Stable adaptive output feedback controller for a class of uncertain non-linear systems

Content Provider	IET Digital Library
Author	Esfandiari, Kasra Abdollahi, Farzaneh Talebi, Heidar Ali
Abstract	This study deals with design of an adaptive output feedback tracking controller for a class of non-linear systems with unknown fixed control direction. By using neural networks and deriving adaptive rules based on the steepest descent algorithm, the authors present a stable output feedback control scheme, which is applicable to a wide class of unknown complicated non-linear systems. Therefore an approach based on the dynamic back propagation algorithm is proposed to develop the adaption laws for systems with more general model structure. Using Lyapunov's direct method, uniformly ultimately boundedness of all signals of the closed-loop system is also ensured. Moreover, it is shown that the bounds on the tracking errors depend on the designing parameters. Hence, an arbitrarily small tracking error can be achieved by adjusting the parameters properly. Finally, simulation results performed on a non-affine uncertain non-linear system having internal dynamics are given to demonstrate the effectiveness of the proposed scheme and the theoretical discussions.
Starting Page	1329
Ending Page	1337
Page Count	9
ISSN	17518644
Volume Number	9
e-ISSN	17518652
Issue Number	Issue 9, Jun (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cta/9/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2014.0822
Journal	IET Control Theory & Applications
Publisher Date	2015-04-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Control Adaptive Rules Arbitrarily Small Tracking Error Backpropagation Closed Loop System Closed-loop System Control System Analysis Control System Synthesis Dynamic Back Propagation Algorithm Feedback Lyapunov Direct Method Lyapunov Method Neural Network Neurocontrol Neurocontrollers Nonaffine Uncertain Non-linear System Nonlinear Control System Self Adjusting Control System Stability in Control Theory Stable Adaptive Output Feedback Tracking Controller Steepest Descent Algorithm Synthesis Method Uncertain System Unknown Complicated Nonlinear System Unknown Fixed Control Direction
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Human-Computer Interaction Electrical and Electronic Engineering Computer Science Applications

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