Design of Robust Controller for a Class of Uncertain Discrete-Time Systems Subject to Actuator Saturation

2017 ◽  
Vol 62 (3) ◽  
pp. 1505-1510 ◽  
Author(s):  
Tahereh Binazadeh ◽  
Majid Bahmani
Keyword(s):  
Discrete Time ◽  
Actuator Saturation ◽  
Robust Controller ◽  
Discrete Time Systems ◽  
Time Systems

Adaptive Control for Discrete-Time Systems with Time-Varying Delay

2014 ◽  
Vol 556-562 ◽  
pp. 2289-2292
Author(s):  
Cun Wu Han ◽  
De Hui Sun ◽  
Song Bi
Keyword(s):  
Parameter Estimation ◽  
Adaptive Control ◽  
Discrete Time ◽  
Time Varying ◽  
Robust Controller ◽  
Time Varying Delay ◽  
Discrete Time Systems ◽  
Time Systems ◽  
Varying Delay

This paper presents an adaptive robust controller for discrete-time systems with time-varying uncertainty and time-varying delay. The controller is designed based on the online parameter estimation and robust H∞ approach. Simulation result is given to verify the effectiveness of the proposed controller.

Delay-dependent stability criterion for uncertain discrete time systems in presence of actuator saturation

2017 ◽  
Vol 40 (6) ◽  
pp. 1873-1891 ◽  
Author(s):  
Vipin Chandra Pal ◽  
Richa Negi
Keyword(s):  
Discrete Time ◽  
Controller Design ◽  
Actuator Saturation ◽  
External Disturbance ◽  
Linear Matrix ◽  
Time Varying Delay ◽  
Discrete Time Systems ◽  
The Stability ◽  
Delay Dependent ◽  
Time Systems

In this paper, the idea of triple Lyapunov functional is applied for controller design of discrete time systems subjected to various nonlinearities like actuator saturation, time varying delay and uncertainties. The performance of the system considered has been examined using H∞ technique in presence of external disturbance. A novel augmented triple Lyapunov-Krasovskii functional is applied with reciprocal convex approach to achieve the stability conditions, which are based on Linear Matrix Inequality. Saturation nonlinearity is tackled using less conservative convex hull method. Numerical examples are provided to illustrate the effectiveness of the proposed criterion.

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