控制工程 ›› 2019, Vol. 26 ›› Issue (5): 829-834.

• 建模与仿真系统 • 上一篇    下一篇

具有强弱Allee效应的捕食系统的稳定性分析

  

  • 出版日期:2019-05-20 发布日期:2023-10-27

Stability Analysis of a Predator System with Strong and Weak Allee Effect

  • Online:2019-05-20 Published:2023-10-27

摘要: 针对具有强弱Allee效应的捕食者-食饵系统稳定性问题进行了研究。考虑对捕食者-食饵系统中的捕食者进行捕获,先讨论了正不动点的存在性,而后利用Routh-Hurvitz稳定性条件分析该系统的正不动点的稳定性。最后,运用Matlab软件,分别针对系统出现的强弱Allee效应,利用时间响应图,相图对系统进行数值仿真。并在系统处于弱Allee效应,考虑当捕获努力量E为变化参数,画出了系统此时的分岔图,Lyapunov指数谱图,结果表明系统具有混沌现象。仿真结果说明捕获行为对该系统稳定性的影响作用。

关键词: 强弱Allee效应, 捕食者-食饵系统, 稳定性

Abstract: The stability problem for a predator-prey system with strong and weak Allee effect is studied. The existence for the positive fixed points of the system with harvesting in the predator is investigated. The stability for the positive fixed points of the system is analyzed by the stability condition of Routh-Hurvitz. Finally, the figures of time response and phase portrait for the predator-prey system with strong and weak Allee effect are obtained by Matlab soft, respectively. For the varying capture force E, the bifurcation diagram and Lyapunov exponents of the system with the weak Allee effect are shown. The system has chaotic phenomena. The simulation results show the influence of the capture behavior on the stability of the system.

Key words:  Strong and weak Allee effect, predator-prey system, stability