多步观测时滞的控制

Based on an innovation analysis method in the Krein space, a sufficient and necessary condition is given for the existence of the solution of H1 control problem for a linear continuous-time system with multiple delays. By introducing a re-organized innovation sequence, the H1 control problem with delayed measurements is converted into a linear quadratic (LQ) problem and a delay-free H2 estimation problem in the Krein space. The controller is given in terms of two forward Riccati equations and a backward Riccati equation.     

无线蜂窝系统功率控制算法

A novel distributed power control algorithm based on interference estimation is presented for wireless cellular system. A classical result of stochastic approximation is applied in this scheme. The power control algorithm is converted to seeking for the zero point problem of a certain function. In this distributed power algorithm, each user iteratively updates its power level by estimating the interference. It does not require any knowledge of the channel gains or state information of other users. Hence, the proposed algorithm is robust. It is proved that the algorithm converges to the optimal solution by stochastic approximation approach.     

具有输入和量测延迟系统的H∞量测反馈控制

致力于寻求同时具有输入输出时滞系统的H∞量测反馈控制器. 引入Krein空间及假量测的目的在于将原问题转化成最小化问题后可以使用新息重组技术. 最终, 我们得到了所期望的控制器, 并发现分离原理在某种程度上同样适用于时滞系统.     

三维模糊控制器的结构研究

基于Zadeh的模糊逻辑推理和语言控制策略,进行了三维模糊控制器的结构研究.证明了具有线性控制规则的三维模糊控制器可等同于一个全局多层次线性关系式和一个局部非线性PID型控制器,由此剖析了模糊控制器的推理机制和其非线性本质.     

无线通讯网络功率和流量的预联合控制

To mitigate the loop delay in distributed wireless networks,a predictive power and rate control scheme is pro- posed for the system model that also accounts for the conges- tion levels and input delay instead of state-delayed in a network. A measurement feedback control problem with input delay is formulated by minimizing the energy of the difference between the actual and the desired signal-to-interference-plus-noise ratio (SNR)levels,as well as the energy of the control sequence.To solve this problem,we present two Riccati equations for the con- trol and the estimation for the time delay systems.A complete analytical optimal controller is obtained by using the separation principle and solving two Riccati equations,where one is back- ward equation for stochastic linear quadratic regulation and the other is the standard filtering Riccati equation.Simulation re- sults illustrate the performance of the proposed power and the rate control scheme.     

广义离散随机线性系统自校正最优预报器

运用现代时间序列分析[1]的方法研究广义离散随机线性系统最优及自适应状态估计.将状态估计转化为输出预报和白噪声估计,从而提出了系统的最优预报器,并且证明最优预报器对于初始值的选取渐近稳定.在噪声统计未知时提出了自校正预报器.仿真例子说明了其有效性.     

自校正Kalman滤波、预报、去卷、平滑新方法

本文用现代时间序列分析方法，提出了基于白噪声估值器和输出预报器解决线性离散定常系统稳态最优和自校正Ｋａｌｍａｎ滤波，预报，平滑问题新方法，此方法可能应用于跟踪系统、信号处理、通讯系统等领域，仿真例子说明了新方法的有效性。     

三维模糊控制器的结构研究1)

基于Zadeh的模糊逻辑推理和语言控制策略，进行了三维模糊控制器的结构研究. 证明了具有线性控制规则的三维模糊控制器可等同于一个全局多层次线性关系式和一个局部非线性PID型控制器，由此剖析了模糊控制器的推理机制和其非线性本质.     

广义离散随机线性系统最优递推估计

运用新息理论和射影的方法，提出了广义离散随机线性系统阳优递推滤波，预报和平滑估计算法，在一定条件下证明了最优递推估计的渐近稳定性。所得的结果可用于正常离散随机线性系统。‘     

时变无线移动信道跟踪鲁棒滤波器的设计

针对无线移动通讯系统的时变参数跟踪问题, 建立了带有随机不确定的线性回归信道模型, 提出了一种基于多项式方法的跟踪算法. 该算法把时变无线移动信道参数跟踪问题转化为利用射影公式求解的滤波问题, 使得设计出的滤波器参数满足最小均方跟踪误差最小. 与传统的无随机不确定系统的最优滤波器设计相比较, 本文提出的鲁棒滤波器设计方法在计算量方面稍有增加, 但是信道参数的跟踪性能大大提高.