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.     

广义不完备混合决策系统的知识约简

针对现实中同时具有丢失型和遗漏型未知属性的混合决策系统的约简问题,建立了广义不完备邻域粗糙集模型,提出了未知属性的辨别方法,给出了一种混合约简算法.模型采用广义邻域关系度量不可分辨关系,通过邻域信息粒子逼近论域空间,是非对称相似关系和容差关系的广义化.依据分类一致性假设及广义邻域关系进行未知属性的辨别,讨论了噪声样本和邻域大小对分类精度的影响.采用UCI数据库中5组数据进行了仿真试验,预测精度证明了约简算法的有效性和可行性.     

自适应滑模控制具有状态和输入时滞的不确定系统

针对一类对象模型具有非匹配不确定性,且同时具有状态时滞和输入时滞的线性系统,基于LMI方法,提出了系统存在滑动模态时滞相关的充分条件,考虑到在处理输入时滞时引入了未知扰动,进一步设计了对扰动参数具有自适应估计能力自适应滑模控制器,该方法保证了闭环系统鲁棒渐近稳定。仿真结果进一步证实了该控制策略的可行性。     

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。     

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…     

感应同步器测角系统误差调整与补偿

分析了引起感应同步器测角系统一次谐波和二次谐波误差的原因,提出了对一次谐波进行补偿及对二次谐波进行调整的方法,并设计了一次谐波误差的补偿电路,通过实测数据并用谐波分析的方法对两项误差进行补偿与调整,提高了感应同步器的测角精度。     

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.