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.

本文针对外部扰动下的连续搅拌釜反应器(CSTR)提出了一种基于事件触发策略的异步滑模控制设计方法。首先，为了对温度和浓度波动引起的CSTR中的多模切换现象进行适当建模，应用马尔可夫过程。其次，引入异步切换特性来描述控制器与系统之间的不匹配，这种不匹配是由信号传输延迟和丢包等因素引起的。为了有效地估计无法实时测量的系统状态，提出了一种基于事件触发策略的观察器，这也可以降低计算成本。此外，设计了一个滑模控制器，以确保动态稳定性和滑动动力学在有限时间内可达。最后，通过仿真实验验证了所提方法的有效性。