摘要
研究了一类时滞分数阶计算机病毒模型Hopf分岔的控制问题。在非受控系统的第一个方程中引入周期脉冲时滞反馈控制器,采用半解析半数值的方法证明了受控系统与其线性化平均系统在一定意义下的等效性,并以此作为理论基础,采用线性化方法和分数阶Laplace变换推导受控系统发生Hopf分岔的临界值,得到系统的稳定域范围以及稳定域随控制器参数的变化情况。结果说明通过调节增益参数值,可有效的延迟系统Hopf分岔的发生。最后,通过恰当的数值模拟验证了理论分析的正确性和可行性,并对比了不同控制增益参数对系统稳定域的影响。
The control problem of Hopf bifurcation for a time-delayed fractional computer virus model is considered.A periodic pulse delay feedback controller is introduced into the first equation of the uncontrolled system.The semi-analytical and semi-numerical method is used to prove the equivalence between the controlled system and its linearized average system.From this theoretical basis,the critical value of Hopf bifurcation in the controlled system is derived by the linearization method and the fractional Laplace transform,and the range of the stability domain and the variation of the stability domain with the controller parameters are obtained.The results show that the Hopf bifurcation of the system can be effectively delayed by adjusting the gain parameter value.Finally,the correctness and feasibility of the theoretical analysis are verified by appropriate numerical simulation,and the influence of different control gain parameters on the system stability domain is compared.
作者
高燕鑫
石剑平
GAO Yanxin;SHI Jianping(School of Science,Kunming University of Science and Technology,Kunming 650500;College of Basic Courses,Shanxi Institute of Energy,Taiyan 030604)
出处
《工程数学学报》
CSCD
北大核心
2023年第4期647-660,共14页
Chinese Journal of Engineering Mathematics
基金
国家自然科学基金(11561034,11761040)
云南省教育厅科学研究基金(2017ZZX133).
关键词
分数阶
时滞
HOPF分岔
计算机病毒模型
周期脉冲控制
fractional-order
time-delay
Hopf bifurcation
computer virus system
periodic pulse control
