Disturbance observer-based fractional-order nonlinear sliding mode control for a class of fractional-order systems with matched and mismatched disturbances

2020 ◽  
Author(s):  
Amir Razzaghian ◽  
Reihaneh Kardehi Moghaddam ◽  
Naser Pariz
Keyword(s):  
Sliding Mode Control ◽  
Fractional Order ◽  
Disturbance Observer ◽  
Sliding Mode ◽  
Fractional Order Systems ◽  
Mode Control ◽  
Nonlinear Sliding Mode Control ◽  
Mismatched Disturbances

Fractional-Order Backstepping Sliding-Mode Control Based on Fractional-Order Nonlinear Disturbance Observer

2018 ◽  
Vol 13 (11) ◽  
Author(s):  
Hadi Delavari ◽  
Hamid Heydarinejad
Keyword(s):  
Sliding Mode Control ◽  
Fractional Order ◽  
Disturbance Observer ◽  
Sliding Mode ◽  
Direct Method ◽  
Nonlinear Disturbance Observer ◽  
Mode Control ◽  
Backstepping Sliding Mode Control ◽  
Nonlinear Disturbance ◽  
Mismatched Disturbances

In this paper, a novel fractional-order (FO) backstepping sliding-mode control is proposed for a class of FO nonlinear systems with mismatched disturbances. Here the matched/mismatched disturbances are estimated by an FO nonlinear disturbance observer (NDO). This FO NDO is proposed based on FO backstepping algorithm to estimate the mismatched disturbances. The stability of the closed-loop system is proved by the new extension of Lyapunov direct method for FO systems. Exponential reaching law considerably decreases the chattering and provides a high dynamic tracking performance. Finally, three simulation examples are presented to show the features and the effectiveness of the proposed method. Results show that this observer approximates the unknown mismatched disturbances successfully.

Sliding mode control of uncertain fractional order systems with delay

2019 ◽  
Vol 93 (4) ◽  
pp. 934-943 ◽  
Author(s):  
Niraj Choudhary ◽  
Janardhanan Sivaramakrishnan ◽  
Indra Narayan Kar
Keyword(s):  
Sliding Mode Control ◽  
Fractional Order ◽  
Sliding Mode ◽  
Fractional Order Systems ◽  
Mode Control
Sign in / Sign up

Export Citation Format

Share Document