共查询到20条相似文献，搜索用时 15 毫秒
1.
A passive control strategy with nonlinear observer is proposed, which can be used to control a class of chaotic dynamical systems to stabilize at different equilibrium points. If the nonlinear function of chaotic system satisfies Lipschitz condition, the nonlinear observer can observe the state variables of the chaotic systems. An important property of passive system is studied to control chaotic systems, that is passive system can be asymptotically stabilized by state feedback controller whose state variables are presented by nonlinear observer. Simulation results indicated that the proposed chaos control method is very effective in a class of chaotic systems. 相似文献
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研究了一个新自治混沌系统的控制问题.当该混沌系统的参数未知时,基于Lyapunov稳定性理论,利用自适应控制策略,设计了相应的非线性控制器和参数自适应律将混沌系统的轨道控制到其任意一个平衡点,并借助Barbalat引理,从理论上证明保证了混沌控制的渐近稳定性.Matlab数值仿真结果表明了所选择的控制器和参数自适应律能有效地实现混沌控制. 相似文献
3.
A new chaos control method is proposed to take advantage of chaos or avoid it. The hybrid Internal Model Control and Proportional Control learning scheme are introduced. In order to gain the desired robust performance and ensure the system's stability, Adaptive Momentum Algorithms are also developed. Through properly designing the neural network plant model and neural network controller, the chaotic dynamical systems are controlled while the parameters of the BP neural network are modified. Taking the Lorenz chaotic system as example, the results show that chaotic dynamical systems can be stabilized at the desired orbits by this control strategy. 相似文献
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INTRODUCTIONOneoftheoldestresearchesofchaosincon trolfieldscanbeseeninthepaperbyKalman(1956) ,whofirstfoundnon synchronousoscil lationsinatwo dimensionalsampled datacontrolsystem .IntheOGYmethoddevelopedbyOttetal.(1990 ) ,chaoticphenomenawaseliminatedbyadjustingparametersofthesystemswhenthechaoticorbitcomesnearaperiodicalorbit.ButtheOGY’smethodrequiresmonitoringthesys temlongenoughtodeterminealinearizationmodeintheneighborhoodofthedesiredunstableperiodicorbitbeforeitcanbeapplied .Besi… 相似文献
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INTRODUCTIONChaoticmotionisacomplexnonlinearmo tion ,whoseorbitstrajectoryinthephaseplaneisverycomplexbutnotstochastic.Chaosplaysanimportantroleindynamicalsystemsandisap pliedinmanyfieldssuchasphysics ,chemistry,economics,andsoon (Heetal.,2 0 0 2 ;Tongeta… 相似文献
6.
The new chaos control method presented in this paper is useful for taking advantage of chaos. Based on sliding mode control
theory, this paper provides a switching manifold controlling strategy of chaotic system, and also gives a kind of adaptive
parameters estimated method to estimate the unknown systems' parameters by which chaotic dynamical system can be synchronized.
Taking the Lorenz system as example, and with the help of this controlling strategy, we can synchronize chaotic systems with
unknown parameters and different initial conditions.
Project supported by Doctoral Subject Research Fund of Ministry of Education of China (1999033512) and Science and Technology
Plan Fund of Zhejiang Province (991110412) 相似文献
7.
针对一类金融混沌系统,分析它的动力学性质,提出一种降维控制的策略,通过控制部分变量达到控制整个系统的目的,不仅可将金融系统由混沌状态控制到均衡点,而且,可将混沌状态控制到任意点,有效地降低了控制成本,为政府及时采取适当可行的经济政策和调整力度提供了一定的参考依据.这种方法也可以用来实现一般的金融混沌系统的均衡点控制 相似文献
8.
张艳 《赣南师范学院学报》2009,30(3):10-13
新Lu混沌系统是一类重要的新混沌系统,它显示了不同于以往混沌系统的复杂的动力学特性．文章主要研究了新Lu混沌系统与统一混沌系统的同步控制问题．基于Lyapunov稳定性定理,利用主动控制和非线性反馈控制均实现了两混沌系统的异结构同步．同时,严格的数学理论分析和数据仿真结果都证明了控制方法的有效性． 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔｎ ＧａＡｓａｎｄａｎｕｍｂｅｒｏｆｏｔｈｅｒｃｏｍｐｏｕｎｄｓｅｍｉｃｏｎｄｕｃｔｏｒｓｃａｎｅｘｈｉｂｉｔｓｅｌｆ ｓｕｓｔａｉｎｅｄｃｕｒｒｅｎｔｏｓｃｉｌｌａｔｉｏｎｓｉｎｔｈｅｍｉｃｒｏｗａｖｅｒａｎｇｅｗｈｅｎｔｈｅａｐｐｌｉｅｄｄｒｉｆｔｆｉｅｌｄｅｘｃｅｅｄｓｔｈｅｃｈａｒａｃｔｅｒｉｓｔｉｃｔｈｒｅｓｈｏｌｄｖａｌｕｅ .Ｓｅｍｉｃｏｎｄｕｃｔｏｒｓａｒｅａｐｐｒｏｐｒｉａｔｅｍａｔｅｒｉａｌｓｆｏｒｕｎｄｅｒｓｔａｎ… 相似文献
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本文讨论了一类连续混沌系统的自适应同步控制问题，当被控系统含有未知参数时，采用Lya-punov函数方法，设计了一类控制器，对未知参数采用自适应调节，在该控制器的作用下，被控系统的输出自适应同步于具有混沌特征的驱动系统的输出。 相似文献
11.
用一个统一系数的含非线性项代替蔡氏电路中线性和非线性部分的方法构造一种变形蔡氏电路,通过理论分析、计算机仿真实验两种方法,研究该电路平衡点的稳定性、初值敏感性质、通向混沌的道路,结果证明该系统是双涡卷吸引子混沌系统。用外力反馈控制方法对该混沌系统进行控制,理论分析和计算机仿真结果表明,该变形蔡氏电路在外加控制作用下,只要取适度的反馈控制强度信号,即可将该混沌系统控制到稳定的周期态,实现预期控制目标。 相似文献
12.
颜森林 《南京晓庄学院学报》2007,23(6):121-124
设想把混沌理论应用到电子对抗中,提出混沌信号干扰攻击敌方通信系统思想方法,提出混沌屏蔽攻击方法.混沌屏蔽攻击的物理机制是:强混沌信号可以直接屏蔽信息信号,小混沌信号可以扰乱信息信号.还发现联合混沌信号和噪声信号其攻击效果确能增加了通信系统的解调难度. 相似文献
13.
提出两个修改的统一混沌系统,分析了它们的动力学特征;基于投影同步方法,提出了投影错位同步方法,并在两个修改的统一混沌系统之间实现了投影错位同步;同时也讨论了投影错位反同步问题．讨论结果表明了修改的统一混沌系统仍然保持基本的非线性性质,并且比原系统在同步中更容易实现．数值仿真表明了投影错位同步方法的有效性． 相似文献
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Rong-hua HUAN Wei-qiu ZHU Yong-jun WU 《浙江大学学报(A卷英文版)》2008,9(3):351-357
A modified nonlinear stochastic optimal bounded control strategy for random excited hysteretic systems with actuator saturation is proposed. First, a controlled hysteretic system is converted into an equivalent nonlinear nonhysteretic stochastic system. Then, the partially averaged Itoe stochastic differential equation and dynamical programming equation are established, respectively, by using the stochastic averaging method for quasi non-integrable Hamiltonian systems and stochastic dynamical programming principle, from which the optimal control law consisting of optimal unbounded control and bang-bang control is derived. Finally, the response of optimally controlled system is predicted by solving the Fokker-Planck-Kolmogorov （FPK） equation associated with the fully averaged Itoe equation. Numerical results show that the proposed control strategy has high control effectiveness and efficiency. 相似文献
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17.
A stochastic optimal control strategy for partially observable nonlinear quasi Hamiltonian systems is proposed.The optimal control forces consist of two parts. The first part is determined by the conditions under which the stochastic optimal control problem of a partially observable nonlinear system is converted into that of a completely observable linear system. The second part is determined by solving the dynamical programming equation derived by applying the stochastic averaging method and stochastic dynamical programming principle to the completely observable linear control system. The response of the optimally controlled quasi Hamiltonian system is predicted by solving the averaged Fokker-Planck-Kolmogorov equation associated with the optimally controlled completely observable linear system and solving the Riccati equation for the estimated error of system states. An example is given to illustrate the procedure and effectiveness of the proposed control strategy. 相似文献
18.
提出了一个新单参数混沌系统,参数在一定范围变化时,能产生多个涡卷混沌吸引子．基于Lvapunov稳定性理论,通过设计控制策略实现了对混沌系统的有效控制,最后仿真结果表明了该方法的有效性． 相似文献
19.
赵磊 《黄山高等专科学校学报》2014,(3):21-23
利用模糊脉冲技术研究一类离散混沌系统的同步控制问题,建立离散混沌系统的离散T-S模糊动态模型,结合脉冲微分方程稳定理论,提出了一种新的离散混沌系统同步的模糊脉冲控制方法,把该方法应用到Henon映射系统中,仿真结果表明了该方法的有效性. 相似文献