采用非连续反馈方法来控制Fitz-Hugh-Nagumo方程描述的激发介质中的螺旋波.在控制过程中,对于系统各个格点快变量的幅值进行观测并和设定的阈值进行比较,当采样格点的快变量的值大于这个阈值时,则对系统进行直接小幅度的负反馈.研究发现:在对系统所有格点快变量幅值观测时选择比较小的阈值则更容易将系统的螺旋波消除掉并使系统达到稳定均匀态.在比较大的阈值下,系统的螺旋波则变得稀疏,也可以导致螺旋波的破裂.在任意选择单个格点的快变量观测下,比较小的反馈强度仍然可以消除螺旋波,系统也达到稳定均匀态.当整个系统达到稳定均匀态时该控制器则自动关闭. The non-continuous feedback method is used to control the spiral wave in the excitation medium described by the Fitz-Hugh-Nagumo equation.In the control process, the amplitude of the fast variable in each grid point of the system is observed and compared with the set threshold value. When the value of the fast variable of grid point is larger than this threshold value, the direct and small negative feedback of the system is carried out directly. The study finds that choosing a relatively small threshold for the fast observation of the magnitude of the grid of all grid points makes it easier to shift the system spiral The wave cancels out and stabilizes the system. At a relatively large threshold, the spiral of the system becomes sparse and can also lead to the rupture of the helical wave. In the case of fast variables with arbitrary choice of a single lattice, the smaller The feedback intensity can still eliminate the spiral wave and the system reaches a stable uniform state, and the controller automatically shuts down when the entire system reaches a steady state.