New Synchronization Algorithm and Analysis of Its Convergence Rate for Clock Oscillators in Dynamical Network with Time-Delays

New synchronization algorithm and analysis of its convergence rate for clock oscillators in dynamical network with time-delays are presented. A network of nodes equipped with hardware clock oscillators with bounded drift is considered. Firstly, a dynamic synchronization algorithm based on consensus control strategy, namely fast averaging synchronization algorithm (FASA), is presented to find the solutions to the synchronization problem. By FASA, each node computes the logical clock value based on its value of hardware clock and message exchange. The goal is to synchronize all the nodes logical clocks as closely as possible. Secondly, the convergence rate of FASA is analyzed that proves it is related to the bound by a nondecreasing function of the uncertainty in message delay and network parameters. Then, FASAs convergence rate is proven by means of the robust optimal design. Meanwhile, several practical applications for FASA, especially the application to inverse global positioning system (IGPS) base station network are discussed. Finally, numerical simulation results demonstrate the correctness and efficiency of the proposed FASA. Compared FASA with traditional clock synchronization algorithms (CSAs), the convergence rate of the proposed algorithm converges faster than that of the CSAs evidently.     

基于Mean Shift算法和NMI特征的目标跟踪算法研究

针对传统Mean shift跟踪算法对空中运动目标跟踪效果不理想的问题, 提出了基于Mean shift算法和归一化转动惯量(Normalized moment of inertia, NMI)特征的目标跟踪算法. 算法中引入了目标NMI特征, 建立了基于虚警概率最小原则和相似度二级判决门限的跟踪策略, 对目标模型进行更新. 同时利用卡尔曼滤波, 在目标被遮挡后进行估计预测. 实验表明该算法在空中运动目标存在较大形变、被遮挡等情况下, 能够进行实时、稳定跟踪.     

基于粒子群算法的防空修正弹控制方法研究

为了提高防空弹道修正弹拦截机动目标的能力,提出了一种弹载执行机构的控制方法.建立了防空弹道修正弹的质点弹道模型,根据弹道修正的基本原理,得到了脉冲控制的优化模型;针对脉冲控制的特点给出了脉冲点火控制策略;应用粒子群算法对脉冲控制指令进行了优化.通过引入脉冲能量消耗最小原则改进了适应度函数,搜索了控制指令的全局优化解.仿...     

EMI电源滤波器的共模插入损耗在失配状态的优化计算

针对阻抗失配下电磁干扰（EMI)滤波器插入损耗的优化计算问题,详细分析了源和负载阻抗对滤波器共模插入损耗的影响,提出了滤波器在失配情况下,共模插入损耗的优化计算方法。结果表明,由于寄生电容、电感的存在,滤波器在高频时的实际插入损耗与理论计算值有较大误差,所以用优化方法对1种通用滤波器的数学模型进行了校正。最后对高频校正模型和优化插入损耗计算方法进行了验证。