Controllers with variable gain for uncertain systems with saturating actuators and time-delays

2020 ◽  
Author(s):  
Nabil EL FEZAZI ◽  
IDRISSI Said ◽  
Youssef EL FEZAZI ◽  
El Houssaine TISSIR
Keyword(s):  
Time Delays ◽  
Uncertain Systems ◽  
Variable Gain ◽  
Saturating Actuators

Pilot-Induced Oscillations Prevention Using Anti-Windup Compensation in the Presence of Time-Delay

2013 ◽  
Vol 325-326 ◽  
pp. 1262-1266
Author(s):  
Valentin Pană
Keyword(s):  
Control System ◽  
Time Delays ◽  
Design Technique ◽  
Comparative Result ◽  
H Infinity ◽  
Reduced Order ◽  
Saturating Actuators ◽  
Time Simulation ◽  
Compensator Design ◽  
Optimization Methodology

The paper presents a compensator design technique for systems with saturating actuators in order to recover as much as possible the performance of the unsaturated case. This anti-windup scheme is obtained using H-infinity optimization methodology. The proposed design approach allows to obtain a anti-windup controller that accounts for time-delays in the control system. Comparative result are presented for the two design methods and time simulation of the nonlinear system are used to analyze the performances of both designs. A reduced order anti-windup controller procedure is also investigated. Keywords: PIO, anti-windup, rate saturation, compensator.

scholarly journals Stability and stabilizability of dynamical systems with multiple time-varying delays: delay-dependent criteria

2003 ◽  
Vol 2003 (4) ◽  
pp. 137-152 ◽  
Author(s):  
D. Mehdi ◽  
E. K. Boukas
Keyword(s):  
Time Delays ◽  
Uncertain Systems ◽  
Sufficient Conditions ◽  
Linear Matrix ◽  
Multiple Time ◽  
Multiple Time Delays ◽  
The Stability ◽  
Delay Dependent ◽  
Bounded Uncertainties ◽  
Norm Bounded Uncertainties

This paper deals with the class of uncertain systems with multiple time delays. The stability and stabilizability of this class of systems are considered. Their robustness are also studied when the norm-bounded uncertainties are considered. Linear matrix inequality (LMIs) delay-dependent sufficient conditions for both stability and stabilizability and their robustness are established to check if a system of this class is stable and/or is stabilizable. Some numerical examples are provided to show the usefulness of the proposed results.

scholarly journals LMI Stability Criterion for Uncertain Systems with Multiple Time Delays

2003 ◽  
Vol 46 (3) ◽  
pp. 1108-1111
Author(s):  
Chang-Hua LIEN ◽  
Jenq Der CHEN ◽  
Ker-Wei YU
Keyword(s):  
Stability Criterion ◽  
Time Delays ◽  
Uncertain Systems ◽  
Multiple Time ◽  
Multiple Time Delays
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