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Distributed predictive control of spiral wave in cardiac excitable media |
Gan Zheng-Ning(甘正宁)a)b)† and Cheng Xin-Ming(成新明)c) |
a Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000, China; b College of Electronic and Information Engineering, Changsha University of Science & Technology, Changsha 410076, China; c School of Information Science and Engineering, Central South University, Changsha 410082, China |
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Abstract 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 control-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.
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Received: 10 July 2009
Revised: 18 December 2009
Accepted manuscript online:
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PACS:
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87.19.Hh
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(Cardiac dynamics)
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87.17.-d
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(Cell processes)
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05.45.-a
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(Nonlinear dynamics and chaos)
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02.30.Yy
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(Control theory)
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Fund: Project supported by the National
Natural Science Foundation of China (Grant No.~10305005) and the
Hunan Provincial Natural Science Foundation of China (Grant
No.~07JJ6126). |
Cite this article:
Gan Zheng-Ning(甘正宁) and Cheng Xin-Ming(成新明) Distributed predictive control of spiral wave in cardiac excitable media 2010 Chin. Phys. B 19 050514
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