Distributed predictive control of spiral wave in cardiac excitable media

• Published in: Chinese physics B 2010-05, Vol.19 (5), p.160-167, Article 050514
• Main Author: 甘正宁 成新明
• Format: Article
• Language: English
• Subjects: Lyapunov函数; Lyapunov理论; 分布式; 心脏模型; 激发介质; 螺旋波; 预测控制策略; 鲁棒控制策略
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/19/5/050514

In this paper, we propose the distributed predictive control strategies of spiral wave in cardiac excitable media. The modified FitzHugh-Nagumo model was used to express the cardiac excitable media approximately. Based on the control-Lyapunov theory, we obtained the distributed control equation, which consists of a positive eontrol-Lyapunov function and a positive cost function. Using the equation, we investigate two kinds of robust control strategies： the time-dependent distributed control strategy and the space-time dependent distributed control strategy. The feasibility of the strategies was demonstrated via an illustrative example, in which the spiral wave was prevented to occur, and the possibility for inducing ventricular fibrillation was eliminated. The strategies are helpful in designing various cardiac devices. Since the second strategy is more efficient and robust than the first one, and the response time in the second strategy is far less than that in the first one, the former is suitable for the quick-response control systems. In addition, our spatiotemporal control strategies, especially the second strategy, can be applied to other cardiac models, even to other reaction-diffusion systems.