Volume 18, Issue 3 (Journal of Control, V.18, N.3 Fall 2024)
JoC 2024, 18(3): 11-22 |
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Firouzabadii M, Vali A R, Kashaninia A. Output Feedback Event Triggered Sliding Mode Control of Linear Systems in the Presence of External Disturbance. JoC 2024; 18 (3) :11-22
URL: http://joc.kntu.ac.ir/article-1-1023-en.html
URL: http://joc.kntu.ac.ir/article-1-1023-en.html
1- Malik Ashtar University of Technology
Abstract: (673 Views)
The event-triggered approach is a scheduling strategy designed to reduce the frequency of control signal updates over time, aiming to enhance overall system efficiency concerning energy consumption and network bandwidth, while maintaining the stability and performance of the control system. This paper investigates the problem of designing an event-based controller for linear time invariant (LTI) systems in the presence of mismatched external disturbances. It is assumed that certain state variables can be directly measured as outputs. The design of an event trigger sliding mode observer is investigated by incorporating a Luenberger observer to meet the H_∞ performance requirements. A sliding mode controller is designed using the Lyapunov method to ensure that the system trajectories remain within the predefined sliding surface. Furthermore, the tuning parameters of the sliding surface and the state observer are calculated using linear matrix inequality (LMI) to achieve asymptotic stability of the sliding mode dynamics with a prescribed H_∞ index. Finally, a non-zero lower bound for the minimum inter-event interval is determined to prevent Zeno phenomena. Then, two numerical examples are provided to demonstrate the performance of the developed controller. Simulation results indicate that, besides achieving the objective of stabilizing the closed-loop system, the control commands generated by the controller are significantly reduced.
Keywords: Sliding mode control, Event triggered control, Linear Matrix Inequality, Zeno phenomena, H_∞ control.
Type of Article: Research paper |
Subject:
General
Received: 2024/09/13 | Accepted: 2024/11/28 | ePublished ahead of print: 2024/12/16 | Published: 2024/12/20
Received: 2024/09/13 | Accepted: 2024/11/28 | ePublished ahead of print: 2024/12/16 | Published: 2024/12/20
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