A new discrete-time sliding mode controller for nonlinear uncertain systems

2016 ◽  
Author(s):  
Jalel Ghabi
Keyword(s):  
Discrete Time ◽  
Uncertain Systems ◽  
Sliding Mode ◽  
Sliding Mode Controller ◽  
Nonlinear Uncertain Systems

A Novel Intelligent Learning Control Scheme for Discrete-Time Nonlinear Uncertain Systems in Multiple Environments

2020 ◽  
Author(s):  
Jingting Zhang ◽  
Chengzhi Yuan ◽  
Paolo Stegagno
Keyword(s):  
Real Time ◽  
Discrete Time ◽  
Uncertain Systems ◽  
Sliding Mode ◽  
System Stability ◽  
Recognition Mechanism ◽  
Deterministic Learning ◽  
Control Scheme ◽  
Nonlinear Uncertain Systems ◽  
Multiple Environments

Abstract In this paper, we propose a novel intelligent control scheme for a class of discrete-time nonlinear uncertain systems operating under multiple environments/control situations. First, based on the deterministic learning theory, artificial neural networks (NNs) are employed to accurately learn/identify the uncertain system dynamics under each individual environment. The learned knowledge is then utilized to: (i) achieve improved control performance by developing a family of experience-based controllers (EBCs), each of which is tailored to an individual environment; and (ii) determine real-time activation of the EBCs by developing a pattern recognition mechanism for online identifying the active control situation. In addition, a robust quasi-sliding mode controller is further designed and embedded in the overall control scheme to guarantee system stability during the transition process among multiple environments. The novelty of the proposed control scheme lies in its intelligent capabilities of knowledge acquisition and re-utilization in real-time control, enabling self-adaption to uncertain changing control environments. A simulation example is included to verify the effectiveness of the proposed results.

On the Robust Stabilization of Nonlinear Uncertain Systems With Incomplete State Availability

2000 ◽  
Vol 122 (4) ◽  
pp. 738-745 ◽  
Author(s):  
G. Bartolini ◽  
A. Pisano ◽  
E. Usai ◽  
A. Levant
Keyword(s):  
Uncertain Systems ◽  
Sliding Mode ◽  
Robust Stabilization ◽  
Control Technique ◽  
Sliding Mode Controller ◽  
Continuous Control ◽  
Nonlinear Uncertain Systems ◽  
The Stability ◽  
Nonlinear Plants ◽  
Second Order Sliding Mode

The control problem of a class of nonlinear uncertain processes with incomplete state availability is dealt with by means of second-order sliding mode control technique. With the aim of using a continuous control, a combined scheme is proposed in which a 2-sliding mode differentiator and a 2-sliding mode controller are coupled. The stability of the whole observer-controller system is proved for a class of nonlinear plants, and some simulation results are finally provided. [S0022-0434(00)02704-0]

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