利用微分代数方程理论研究了一类广义生物经济模型、首先,研究参数临界状态下,该模型平衡点的稳定性情况,并进一步给出系统存在跨临界分岔和奇异诱导分岔的充分条件.其次,设计状态反馈控制器,通过控制捕获努力量,消除该系统中存在的奇异诱导分岔及脉冲行为,抑制种群变化,使系统趋于稳定、最后,通过数值仿真说明控制器的有效性.
This paper researches a class of singular biological economic model using the theories of differential-algebraic equations. Firstly, the problem of stability of equilibria is discussed under the condition of critical parameter. Moreover, the sufficient conditions of existence for the transcritical bifurcation and the singularity induced bifurcation are obtained. Secondly, the state feedback controller is designed so that the singularity induced bifurcation and impulsive behavior can be eliminated by controlling the fishing effort, and can restrain the population change to make the system stable. Last, the simulation shows the validity of the controller.