共查询到20条相似文献,搜索用时 109 毫秒
1.
在热储备可修复平行系统的基础上,增加了一个预警状态,使其变为预警系统,使得系统的初值条件属于定义域,从而由线性算子半群方法求得的弱解变为强解,并研究了系统的稳定性,同时当风险系数λ_c。趋于无穷大时对预警系统和非预警系统的稳态可用度进行了分析. 相似文献
2.
本文研究了拟周期平面Hamilton系统和时逆系统的平衡点的稳定性.在适当的条件下,证明了平衡点的稳定性以及在平衡点附近存在着大量的拟周期解. 相似文献
3.
4.
《数学的实践与认识》2013,(16)
基于切换Lyapunov函数描述了在离散时间下一类不确定的离散混杂系统的L2增益分析以及控制合成问题.运用Lyapunov函数理论以及线性矩阵不等式,给出了一类不确定离散切换系统在任意切换律下的稳定性条件,并构造了反馈控制律使系统达到干扰衰减及内稳定性. 相似文献
5.
张道祥李奔陈丹丹林雅婷王鑫梅 《数学物理学报(A辑)》2022,(2):570-582
该文首先提出了一类带有经济效益的时滞分数阶微分-代数捕食-被捕食系统.利用稳定性理论,得到了在零经济收益条件下,系统的正平衡点是局部渐近稳定的;在正经济收益条件下,时滞产生Hopf分岔的充分条件.最后借助于数值模拟验证了理论的正确性,并进一步讨论了分数阶阶数、经济收益和时滞对系统稳定性的影响. 相似文献
6.
该文探讨了单支方法关于一类中立型延迟微分方程(NDDEs)系统的整体稳定性和渐近稳定性.在适当的条件下,获得了单支方法关于NDDEs系统的一些新的非线性稳定性判据. 相似文献
7.
本文对温盐双扩散系统的稳定性问题引入了一种简洁的强非线性自治系统稳定性的分析方法,用摄动理论得到了无穷小运动下线性周期解的单调与振荡分支的存在范围及有限振幅运动下非线性周期解的振荡分支在0<rs-rsc<<1条件下的存在区域及稳定性区域,给出了不同涡旋方向下的稳定性结论. 相似文献
8.
9.
本文先利用Liapunov函数方法证明一类三阶非线性系统的渐近稳定性,然后在不同情况下利用Shimanov区域方法证明其正半轨线的有界性,最终得到了系统在一些较弱条件下的全局稳定性。 相似文献
10.
在执行器饱和约束下,文章考虑了一类金融系统在脉冲控制下的稳定性和同步.首先,通过引入一个死区非线性函数表示了脉冲时刻的系统的饱和非线性,得到了饱和脉冲控制下金融混沌系统的局部指数稳定性条件.其次,通过建立饱和脉冲控制器,得到了驱动响应金融系统混沌同步的充分条件.最后,通过一个数值例子验证了结论的有效性. 相似文献
11.
12.
13.
This paper investigates the system stability of a sampled-data fuzzy-model-based control system, formed by a nonlinear plant and a sampled-data fuzzy controller connected in a closed loop. The sampled-data fuzzy controller has an advantage that it can be implemented using a microcontroller or a digital computer to lower the implementation cost and time. However, discontinuity introduced by the sampling activity complicates the system dynamics and makes the stability analysis difficult compared with the pure continuous-time fuzzy control systems. Moreover, the favourable property of the continuous-time fuzzy control systems which is able to relax the stability analysis result vanishes in the sampled-data fuzzy control systems. A Lyapunov-based approach is employed to derive the LMI-based stability conditions to guarantee the system stability. To facilitate the stability analysis, a switching fuzzy model consisting of some local fuzzy models is employed to represent the nonlinear plant to be controlled. The comparatively less strong nonlinearity of each local fuzzy model eases the satisfaction of the stability conditions. Furthermore, membership functions of both fuzzy model and sampled-data fuzzy controller are considered to alleviate the conservativeness of the stability analysis result. A simulation example is given to illustrate the merits of the proposed approach. 相似文献
14.
在齐次Neumann边界条件下研究一类Degn-Harrison反应扩散系统.首先讨论常微分系统正平衡点的稳定性和Hopf分支,其次研究扩散系统,给出扩散系数对正平衡点稳定性的影响,建立系统的Turing不稳定性,同时在扩散系数满足一定条件时给出Hopf分支的存在性. 相似文献
15.
S.A. Agafonov 《Journal of Applied Mathematics and Mechanics》2010,74(4):401-405
Two stability problems are solved. In the first, the stability of mechanical systems, on which dissipative, gyroscopic, potential and positional non-conservative forces (systems of general form) act, is investigated. The stability is considered in the case when the potential energy has a maximum at equilibrium. The condition for asymptotic stability is obtained by constructing Lyapunov's function. In the second problem, the possibility of stabilizing a gyroscopic system with two degrees of freedom up to asymptotic stability using non-linear dissipative and positional non-conservative forces is investigated. Stability of the gyroscopic system is achieved by gyroscopic stabilization. The stability conditions are obtained in terms of the system parameters. Cases when the gyroscopic stabilization is disrupted by these non-linear forces are indicated. 相似文献
16.
采用具有加权向量范数型李雅谱诺夫函数,对具滞后中立型线型大系统进行模型集结,得到集结系统;再运用比较原理与时域中的微分积分不等式,讨论相应集结系统,从而通过集结系统的稳定性,获得了具滞后中立型大系统的指数稳定性。 相似文献
17.
Ming-Ling Lee 《Applied Mathematical Modelling》1989,13(12):693-701
A method for predicting the dynamic stability of a nonlinear barge-towing system is presented in which the equations of motion of the dynamic system are first transformed into a six-dimensional state-space equation. The governing equation is then linearized by using the Taylor series expanding with respect to the equilibrium configurations of the towed barge. It is found that the stability conditions of a towing system are determined by the signs of the real part of some associated eigenvalues: Positive and negative 1's will result in unstable and stable dynamic responses, respectively, and 0 corresponds to the marginally stable condition. The reliability of the foregoing criteria is confirmed by the time histories (simulations) of the nonlinear barge-towing system. The effects of the stabilizing skegs and significantly improve the course stability of the towed barge and that the length and material of the towrope are also key factors affecting the dynamic stability of the barge-towing system. 相似文献
18.
This paper considers a phytoplankton-zooplankton bio-economic system with delay and harvesting, which is described by differential-algebraic equations. Local stability analysis of the system without delay reveals that a singularity-induced bifurcation phenomenon appears when a variation of the economic interest is taken into account, furthermore, a state feedback controller is designed to stabilize the system at the interior equilibrium. Then, we show that delay, which is considered in the toxic liberation, can induce stability switches, such that the positive equilibrium switches from stability to instability, to stability again and so on. Finally, some numerical simulations are performed to justify analytical findings. 相似文献
19.
分析一类含小参数的时变非线性系统关于给定状态约束集合的技术稳定性.根据向量微分比较原理和基本的单调性准则,利用向量V函数方法给出由系统系数表达的技术稳定性判据.并讨论了基于派生系统和线性化方法研究非线性系统技术稳定性的条件.另外,对于派生时变线性系统的指数稳定性给出了简单的代数判据.最后给出示例说明文中方法. 相似文献
20.
随着科学技术的发展,特别是电子产品和网络的运用,系统的可靠性分析变得日益重要.在Dhillon B S和Yang N F(1993)中通过增补变量的方法建立了这类系统的数学模型并进行研究.在此基础上进一步讨论系统解的渐进稳定性和指数稳定性,证明了系统算子在Bnacha空间中可以转化为C_0半群,0是系统算子的简单本征值,而且是系统在虚轴上唯一的谱点.此外本文还分析了在系统扰动前后系统算子解的基本谱,结果显示系统的动态解以指数稳定性趋向于系统的稳态解,通过maple作图发现系统稳定解有时候不一定趋向于系统的实际解,这对实际运用有重要的指导意义. 相似文献