导引头稳定平台控制回路设计分析

在稳定平台控制系统中分析了载体扰动产生的干扰力矩及对视线角引起的摆动,分析了选择不同的视线角速度输出点时对视线角速度、隔离度的影响及对控制系统传函的要求,为选择电机输出力矩、选择陀螺量程及控制系统传函的设计提供了理论依据.在分析的基础上构建了数字仿真试验系统,仿真表明视线角速度输出有较好的品质和较高的隔离度.     

Two Modes and Criterion of Brittle Fracture

The plastic zone at the tip of the flaw (including acute cark and common notch) was investigated. Forthe notch specimen, a formula of toughness K was proposed, and its physical meaning was emphasized.Twomodes of brittle fracture was identified and the evaluating criterion was established.     

逆合成孔径雷达图象的旁瓣清除技术

本文基于逆合成孔径雷达的原理,提出了新的图象旁瓣清除方法,设计了新的门限判别准则,并成功实现了模型飞机的成像。     

Determination of forming limit diagrams - a new analysis method for characterization of materials' formability

This paper introduces a new analysis method for characterization of materials' formability independent of individual expertise. Therefore forming limit diagrams (FLDs) are determined using the Nakazima method. Investigations on the influence of the analysis method and the failure criterion in detail will be presented. The new analysis method avoids misinterpretation of the forming limits of any material and the FLD. The forming behavior of materials has to be recorded with a frequency up to 20 Hz, in order to detect the forming limits within a sequence of pictures from onset of necking to failure by cracking.     

数据挖掘算法的评价标准与方法

文章阐述了数据挖掘的定义及所涉及到的基础理论知识，并根据数据挖掘本身的特点，探讨了选择合适挖掘算法的重要性，同时分析提出了数据挖掘算法的评价标准与评估方法。并结合实例作了分析。     

Performance Evaluation of Power Oscillation Damping Controller—Firefly Algorithm Based Parameter Tuning

This paper presents the performance evaluation of power oscillation damping controller based on firefly algorithm (FA) parameter tuning. The power system stabilizer (PSS), unified power flow controller (UPFC), and static synchronous series compensator (SSSC) are tuned with FA by minimizing integral time multiplied by absolute error (ITAE) as an objective function. An integrated multi-stage linear quadratic regulator – power oscillation damping UPFC/SSSC has been proposed with precise tuning of control parameters which results in overall states' oscillation damping as compared to other classical methods. It has been observed that the proposed control structure damps the oscillations adequately and is modular in design methodology. The sample power system comprising six areas has been considered to demonstrate the effectiveness of the concept. The software has been developed based on the proposed work by the authors and the MATLAB code has been generated in R2009b version. The states' inter-relation which has been shown with eigenvalues reflects a better regulation and the step response is also validated.     

质子交换膜燃料电池可靠性分析

可靠性是质子交换膜燃料电池(PEMFC)的重要指标，文中定性分析了PEMFC组成元件、装配工艺和工作过程的可靠性。提出了提高PEMFC可靠性的措施和可靠性的设计原则。     

柴油机进气道流热耦合计算研究

通过数值模拟方法对气道进行计算，计算结果与实验结果基本相符，证明了数值计算的可靠度。然后计算得到了气道直道弯道部分的准则方程式，最后分析了离心浮升力对气道内部对流换热的影响。     

一类单容纯时滞系统二次优化控制

本文研究受控对象为Ｇａ（ｐ）＝Ｋ／１＋Ｔｐｅ＾－ＬＰ和Ｇｂ（ｐ）＝Ｋ／ｐｅ＾－ＬＰ二次优化控制，给出一个经验公式。用以确定二次优化控制器的优化参数，可以节省了大量仿真寻优机量，结果表明，二次优化控制兼有Ｓｍｉｔｈ预估器全补偿纯时滞和状态反馈两类控制器的优点，性能指标好，鲁棒性强，尽管Ｇａ（ｐ）和Ｇｂ（Ｐ）两者结构不同，但它们二次优化系统性能指标相近，一阶模型无超调，二阶模型σ２％≤２％，三阶模型，     

基于改进型D-S证据理论的决策层融合滤波算法

本文针对线性和非线性混合滤波技术的不足,提出了一种基于改进型D-S证据理论的融合滤波算法.本算法首先分析了基本D-S证据理论组合准则缺陷的产生原因,从而采取消去证据间相关性、自适应地分配矛盾信息给与冲突有关的焦元等措施,改进了基本D-S证据理论的组合准则,提高了其融合性能.在此基础上,本算法又根据混合滤波器单源判别边界点误报风险大、可靠性和容错性差的弊端,增加了多子源判决准则,利用改进了的D-S证据理论的组合准则,实施融合判决.后续实验证明了本算法的有效性,为图像滤波的技术发展提供了一个新的探索途径.