一个新的三维混沌系统的分析、电路实现及同步

中心流形理论提供了一个将高维系统降维研究的方法，应用该理论研究了一个新的混沌系统的基本特性，给出中心流形上流方程，分析这个新的混沌系统的叉式分岔.通过构建电路实现了该混沌系统,从而验证了系统的混沌行为，证实了混沌吸引子的存在.同时说明了由于电路信号频率与数值信号频率的不同所带来的数值仿真与物理实现之间在应用上有着重要区别.最后利用单变量反馈控制方法实现了新系统的同步控制，并给出了完整的同步实现电路. 关键词： 三维混沌系统 中心流形 电路实现 同步     

综合广义预测自校正控制器的稳定性与随机收敛性

本文给出了广义预测自校正控制器的统一模式,证明了该控制器的闭环稳定性与随机收敛性。     

不规则小波框架的膨胀列

研究了L2(R)中小波框架{ψj,k}j,k={sjψ(sj·-kb)}j,k∈Z的膨胀列{sj}j的性质.如果{ψj,k}j,k是L2(R)的一个小波框架,那么膨胀列是无界的,在某些条件下{sj}j∈Z一定能够被重排为指标集Z上的一个非减数列,而且存在常数λ,μ∈(0,1)和p∈Z ,使得对j∈Z有λ相似文献   

用奇异值分解求解的PI型有约束广义预测控制算法

本文推得了一种比例积分型广义预测控制算法，在算法中加入了对系统的输入和输出信号的约束以加强算法应用能力，在控制值的优化示解中使用了矩阵奇异值分解以增加算法的精度和数值稳定性。     

Local bifurcation analysis of a four-dimensional hyperchaotic system

Local bifurcation phenomena in a four-dlmensional continuous hyperchaotic system, which has rich and complex dynamical behaviours, are analysed. The local bifurcations of the system are investigated by utilizing the bifurcation theory and the centre manifold theorem, and thus the conditions of the existence of pitchfork bifurcation and Hopf bifurcation are derived in detail. Numerical simulations are presented to verify the theoretical analysis, and they show some interesting dynamics, including stable periodic orbits emerging from the new fixed points generated by pitchfork bifurcation, coexistence of a stable limit cycle and a chaotic attractor, as well as chaos within quite a wide parameter region.     

A novel hyperchaos evolved from three dimensional modified Lorenz chaotic system

This paper reports a new four-dimensional continuous autonomous hyperchaos generated from the Lorenz chaotic system by introducing a nonlinear state feedback controller. Some basic properties of the system are investigated by means of Lyapunov exponent spectrum and bifurcation diagrams. By numerical simulating, this paper verifies that the four-dimensional system can evolve into periodic, quasi-periodic, chaotic and hyperchaotic behaviours. And the new dynamical system is hyperchaotic in a large region. In comparison with other known hyperchaos, the two positive Lyapunov exponents of the new system are relatively more larger. Thus it has more complex degree.[第一段]     

递推阻尼最小二乘法的收敛性与稳定性

递推最小二乘法是参数辨识中最常用的方法,但容易产生参数爆发现象.因此对一种更稳定的辨识方法——递推阻尼最小二乘法进行了收敛特性的分析.在使用算法之前先归一化测量向量,结果表明,参数化距离收敛于一个零均值随机变量,并且在持续激励条件下,适应增益矩阵的条件数有界.参数化距离的方差有界.     

新型离散跟踪-微分器的设计与分析

§ 1　 IntroductionAt present,difference method is often used forcomputing the differential coefficientofsignals.Since the error of this method is very obvious,it is not adapted to the systems ofhigh precision.There is a nonlinear tracking-differentiator(T-D) given in paper[1 ] ,whose precision is quite better than thatwith difference method.Itchanges the situation ofconsistent use of difference method.The designed tracking-differentiator has an analyticsolution,and has been applied to many …     

广义预测控制的鲁棒性机理分析

This paper deeply analyzes the closed-loop nature of GPC in the framework of internal model control (IMC) theory. A new sort of relation lies in the feedback structure so that robust reason can be satisfactorily explained. The result is significant because the previous conclusions are only applied to open-loop stable plant (or model).     

多变量极点配置自校正控制器的矩阵方程求解

§1.多变量极点配置自校正控制器 设系统由下面模型描述:其中y,u,e是p维列向量,分别代表系统输出、输入和噪声干扰,A(q~(-1)),B(q~(-1))和C(q~(-1))是q~(-1)的多项式阵,A和C具有形式: