A general method for modified function projective synchronization

This paper investigates the modified function projective synchronization,which means that the drive system and the response system are synchronized up to a desired scale matrix of function. By the active control scheme,a general method for modified function projective synchronization is proposed. Numerical simulations on chaotic Rssler system and hyper-chaotic Chen system are presented to verify the effectiveness of the proposed scheme.     

Robust H_∞ output feedback controller design for linear uncertain discrete-time switched systems via state reset

This paper studies the problem of robust H∞ output feedback controller via state-reset for linear uncertain discrete-time switched systems. Using multiple Lyapunov functions,we address an output feedback controller under arbitrary switching signals,in which an H∞ performance is required. The condition is shown in the form of linear matrix inequalities (LMI). Finally,a numerical example shows the feasibility of the designed controller and illustrates that the new sufficient condition has lower conservation and more optimized H∞ tfperformance.     

一种低成本MEMS惯性传感器应用技术研究

讨论和分析了标定一种低成本MEMS INS传感器的方法和过程,MEMS传感器价格低廉但是误差很大,因此对其进行精确的标定对减少系统误差有很大的作用,包括零偏、刻度因子以及未对准误差和非正交误差等.通过对陀螺误差进行建模分析,利用卡尔曼滤波对数据进行处理,使用不需要传感器与测试平台精确对准的多位置对准方法来标定加速度计参数,结果表明陀螺的系统方差有很大改善,同时在静态情况下进行导航解算,表明标定结果有效.     

模型相关时变时滞马尔可夫跳变系统低保守稳定性

本文研究了时变时滞与模型相关的随机马尔可夫跳变系统的时滞相关稳定性问题. 通过建立时变时滞与模型相关的系统模型, 构造不同的Lyapunov-Krasovskii函数, 并通过引入改进的积分等式, 以线性矩阵不等式的形式提出了具有较小保守性的时滞依赖稳定性条件. 最后用几个数值算例说明本文结论的有效性及较低的保守性.     

一种基于SVM重采样的似然粒子滤波算法

针对弱观测噪声条件下非线性、非高斯动态系统的滤波问题,提出一种基于支持向量机的似然粒子滤波算法.首先,采用似然函数作为提议分布,融入最新的观测信息,比采用先验转移密度的一般粒子滤波算法更接近状态的真实后验密度;然后,利用当前粒子及其权值,使用支持向量机估计出状态的后验概率密度模型;最后,根据此模型重采样更新粒子集,有效地克服粒子退化现象并提高状态估计精度.仿真结果表明了所提出算法的可行性和有效性.     

一类离散非线性不确定时滞系统的鲁棒滑模滤波

This paper is concerned with the problem of robust sliding-mode filtering for a class of uncertain nonlinear discrete-time systems with time-delays. The nonlinearities are assumed to satisfy global Lipschitz conditions and parameter uncertainties are supposed to reside in a polytope. The resulting filter is of the Luenberger type with the discontinuous form. A sufficient condition with delay-dependency is proposed for existence of such a filter. And the desired filter can be found by solving a set of matrix inequalities. The resulting filter adapts for the systems whose noise input is real functional bounded and not be required to be energy bounded. A numerical example is given to illustrate the effectiveness of the proposed design method.     

Orthogonality of inductosyn angle-measuring system error and error-separating technology

0　INTRODUCTIONRoundinductosynhasadvantagesofhighprecision ,goodreliabilityandassemblingconveniently[1,2 ] .Itsangle measuringerrorsincludemainlythefirst orderlong period(36 0°)harmonicerror ,thesecond orderlong periodhar monicerror,thefirst ordershort periodharmonicerrorandthesecond ordershort periodharmonicerror .Aimingata36 0 poleroundinductosyn[4 ] ,Ref.[5 ]putsforwardamethodofhardwarecompensationforthefirst ordershort periodharmonicerrorandthesecond ordershort periodharmonicerror.T…     

高精度转台速率系统

介绍一种由数字电路产生０．０００１度的高分辨率偏差信号，由模拟电路构成控制器的转台高精度速率系统。系统具有伺服刚度大，精度高、可靠性好等优点。     

RTX在激光制导炸弹半实物仿真中的应用

三轴仿真转台是激光制导炸弹导引头半实物仿真系统中的关键设备之一，针对高精度三轴仿真转台实时控制的要求，讨论了基于RTX的实时控制系统的设计和实现方法，介绍了RTX的实时特征．对Windows—NT系统和RTX实时操作系统在实时精度方面的性能进行了比较。并给出弹道跟踪曲线等实验结果。实验证明，该系统实时性高，工作稳定可靠。     

服务的三重境界与品牌的三度打造

品牌是一个复合概念,尤其是在竞争十分激烈的今天,其内涵越来越厂泛：它不仅仅是用以区别于同类竞争对手的产品或服务,更是一个国家的经济命脉。对于餐饮业来说,提升服务,既是打造品牌的有效手段,也是打造品牌的重要内容。