Robust adaptive control of a class of uncertain nonlinear systems with time-varying output constraints

2016 ◽  
Author(s):  
Guichao Yang ◽  
Guigao Le ◽  
Dawei Ma ◽  
Jianyong Yao
Keyword(s):  
Adaptive Control ◽  
Nonlinear Systems ◽  
Robust Adaptive Control ◽  
Time Varying ◽  
Uncertain Nonlinear Systems ◽  
Output Constraints ◽  
Robust Adaptive

Robust Adaptive Control of Mildly Nonlinear Systems With Time Varying Input/Output Delays

2012 ◽  
Author(s):  
James P. Nelson ◽  
Mark J. Balas ◽  
Richard S. Erwin
Keyword(s):  
Adaptive Control ◽  
Nonlinear Systems ◽  
Adaptive Controller ◽  
Robust Adaptive Control ◽  
Control Law ◽  
Time Varying ◽  
Robust Adaptive ◽  
Input Delays ◽  
Persistent Disturbances ◽  
Adaptive Control Law

Many systems must operate in the presence of delays both internal to the system and in its inputs and outputs. In this paper we present a robustness result for mildly nonlinear systems. We use this result to show that, for small unknown time varying input delays, a simple adaptive controller can produce output regulation to a neighborhood with radius dependent upon the size of an upper bound on the delay. This regulation occurs in the presence of persistent disturbances and the convergence is exponential. We conclude with an example to illustrate the behavior of this adaptive control law.

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