Event-triggered asynchronous sliding mode control of CSTR based on Markov model

In this paper, an asynchronous sliding mode control design method based on the event-triggered strategy is proposed for the continuous stirred tank reactor (CSTR) under external disturbance. Firstly, with the purpose of appropriately modeling the multi-mode switching phenomenon in the CSTR caused by the fluctuation of temperature and concentration, the Markov process is applied. Secondly, the asynchronous switching characteristics are introduced to describe mismatch between the controller and the system, which caused by some factors such as signal transmission delay and packet dropout. In order to effectively estimate the system states that cannot be measured in real time, an observer based on the event-triggered strategy is proposed, which also can reduce the computational cost. In addition, a sliding mode controller is designed to ensure the dynamic stability and the sliding dynamics is reachable in a finite time. Finally, the effectiveness of the proposed method is verified by simulation experiments. (c) 2021 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.

Automated summary

This paper proposes an asynchronous sliding mode control design method based on the event-triggered strategy for the continuous stirred tank reactor (CSTR) under external disturbance. Markov process is applied to model the multi-mode switching phenomenon caused by temperature and concentration fluctuation. Asynchronous switching characteristics are introduced to describe mismatch between the controller and the system. An observer based on the event-triggered strategy is proposed to estimate system states in real time and reduce computational cost, while a sliding mode controller is designed for dynamic stability.