NDLI: Adaptive output feedback tracking control for non-linear switched stochastic systems with unknown control directions

Content Provider	IET Digital Library
Author	Ma, Hongjun Liu, Yanli Ye, Dan
Abstract	The problem of adaptive fuzzy output feedback tracking control for a class of switched stochastic non-linear systems with time-varying delay and unknown control directions is addressed in this study. During the adaptive controller design procedure, a state observer is introduced to estimate the unmeasurable system states, an appropriate stochastic Lyapunov–Krasovskii functional is utilised to compensate the time-varying delay terms, and fuzzy logic systems are employed to approximate a suitable unknown function which is composed of all the unknown non-linearities of the switched systems. In addition, the Nussbaum-type function is used to detect the unknown control directions. With the help of the designed controller independent of switching signals, the semi-globally uniformly ultimately boundedness of all the closed-loop signals is guaranteed and the tracking error converges to a small neighbourhood of the origin. Finally, a simulation example is given to illustrate the effectiveness of the proposed approach.
Starting Page	484
Ending Page	494
Page Count	11
ISSN	17518644
Volume Number	12
e-ISSN	17518652
Issue Number	Issue 4, Mar (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cta/12/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2017.0772
Journal	IET Control Theory & Applications
Publisher Date	2017-12-12
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Control Adaptive Controller Design Procedure Adaptive Fuzzy Output Feedback Tracking Control Problem Closed Loop System Closed-loop Signal Control System Analysis Control System Synthesis Delay Distributed Parameter Control System Feedback Fuzzy Logic System Lyapunov Method Modelling And Identification Nonlinear Control System Nonlinear Switched Stochastic System Nussbaum-type Function Observers Self Adjusting Control System Semiglobally Uniformly Ultimately Boundedness Simulation Stability in Control Theory State Observer Stochastic Lyapunov-Krasovskii Functional Stochastic System Switching Signal Switching System (control) Synthesis Method Time Varying Control System Time-varying Delay Term Tracking Error Unknown Control Directions Unknown Function Unmeasurable System State Estimation
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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