Improved Dead Zone Modification for Robust Adaptive Control of Uncertain Linear Systems Described by Input-Output Models With Actuator Faults

2011 ◽  
Vol 56 (4) ◽  
pp. 863-867 ◽  
Author(s):  
Behnam Allahverdi Charandabi ◽  
Farzad R. Salmasi ◽  
Ali Khaki Sedigh
Keyword(s):  
Adaptive Control ◽  
Linear Systems ◽  
Dead Zone ◽  
Robust Adaptive Control ◽  
Actuator Faults ◽  
Input Output ◽  
Robust Adaptive ◽  
Uncertain Linear Systems

Adaptive control of a class of non-linear systems preceded by backlash-like hysteresis

2014 ◽  
Vol 24 (5) ◽  
Author(s):  
JIANPING CAI ◽  
LUJUAN SHEN ◽  
FUZHEN WU
Keyword(s):  
Differential Equation ◽  
Adaptive Control ◽  
Linear Systems ◽  
Tracking Error ◽  
Robust Adaptive Control ◽  
Unknown Parameters ◽  
Control Scheme ◽  
Non Linear ◽  
Non Linear Systems ◽  
Robust Adaptive

We consider a class of uncertain non-linear systems preceded by unknown backlash-like hysteresis, which is modelled by a differential equation. We propose a new state feedback robust adaptive control scheme using a backstepping technique and properties of the differential equation. In this control scheme, we construct a new continuous function to design an estimator to estimate the unknown constant parameters and the unknown bound of a ‘disturbance-like’ term. The transient performance of the output tracking error can be guaranteed by the introduction of pre-estimates of the unknown parameters in our controller together with update laws. We do not require bounds on the ‘disturbance-like’ term or unknown system parameters in this scheme. The global stability of the closed-loop system can be proved.

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