极坐标下卡尔曼滤波算法的研究

针对在某些情况下直角坐标系中卡尔曼滤波算法运算量较大、模型建立比较困难等缺点,提出了极坐标下的卡尔曼滤波算法。该算法选用极坐标作为滤波坐标系,建立了目标运动模型和外推方程,给出了增益阵的一种新的计算方法。仿真结果表明,提出的滤波算法在数据率较高时,滤波精度略低于直角坐标下卡尔曼滤波算法,优于自适应α－β滤波算法,但运算量明显低于直角坐标下卡尔曼滤波算法。     

近方空情信息处理系统的实现

通过建立近方空情信息处理系统导出了大地经纬坐标、五五方格坐标向平面直角坐标进行转换和空中目标飞行参数计算的方法，实现了近方空中情报的快速处理。测试结果表明：本系统较好地解决了现役高炮部队空情信息标绘不及时、指令报读缓慢、操作可靠性差等问题。     

OpenGL二次曲面纹理映射技术分析与应用

为了实现二次曲面的纹理映射,在分析OpenGL纹理映射技术的基础上,详细讨论了球形曲面纹理坐标的生成和设置.然后利用OpenGL函数库,在VC＋＋环境下,实现了雷达天线罩迷彩纹理贴图的效果展示.     

Dynamic surface control-backstepping based impedance control for 5-DOF flexible joint robots

A new impedance controller based on the dynamic surface control-backstepping technique to actualize the anticipant dynamic relationship between the motion of end-effector and the external torques was presented. Comparing with the traditional backstepping method that has “explosion of terms” problem, the new proposed control system is a combination of the dynamic surface control technique and the backstepping. The dynamic surface control (DSC) technique can resolve the “explosion of terms” problem that is caused by differential coefficient calculation in the model, and the problem can bring a complexity that will cause the backstepping method hardly to be applied to the practical application, especially to the multi-joint robot. Finally, the validity of the method was proved in the laboratory environment that was set up on the 5-DOF (degree of freedom) flexible joint robot. Tracking errors of DSC-backstepping impedance control that were 2.0 and 1.5 mm are better than those of backstepping impedance control which were 3.5 and 2.5 mm in directions X, Y in free space, respectively. And the anticipant Cartesian impedance behavior and compliant behavior were achieved successfully as depicted theoretically.     

基于正交多项式的超声波测流多声道坐标求解方法

应用几种正交多项式及其零点特性,建立了不同断面形状管道超声波测流声道分布坐标、声道加权积分系数的数学模型,提出了其相应最优声道分布坐标、声道加权积分系数的求解方法,从而较好地解决了多声道超声波测流最优声道选择和布置问题.     

两种测色仪器的比较和评价

介绍了两类常用的色度仪器的工作原理和结构，并对其优缺点进行了比较和评价。     

基于支持向量机的彩钢玻璃色差分离技术研究

为了将彩钢玻璃中有色差的玻璃样本分离出来,提出一种利用分光测色仪检测,并与支持向量机想结合分离色差样本的方法。首先利用分光测色仪获取出样本玻璃的各采样点的CIE色度值等光学数据,建立数据样本集,然后选取特征参数及训练集并建立 SVM模型,其次选取不同类型核函数及参数进行对比实验,使模型最优化,最后利用该模型对预测集进行处理,检测并分离出有色差的玻璃样本。实验结果表明该方法可以高效准确地检测出彩钢玻璃中有色差的样本。     

坐标组合法对直埋电缆与土壤界面温度场的数值计算

高压电力输送在城市一般都采用地下电缆的形式。为确保电缆能够安全 ,正常的工作 ,采用精确的方法预计地下电缆的载流量与热特性是很有意义的。本文采用有限差分法 ,用坐标组合的方式对土壤区域和电缆区域分别进行计算 ,最终可以确定任意敷设方式下电缆允许的载流量。计算与实验结果进行比较 ,认为完全可以满足实际需要。     

基于路面亮度系数表的路灯配光优化及透镜设计

本文参照了国际照明委员会CIE所颁布的路面亮度系数表,以C2路面为例讨论并设计了一种路灯的配光分布,同时满足较高的照度均匀度和路面亮度均匀度的要求,并获得了较高的能量效率Q（Lav／Eav）。基于此优化配光,采用笛卡尔椭球阵列设计了自由曲面透镜,在Dialux中验证了该透镜的配光性能,实现了Uo=0．6,UL=0．7,UE=0．68,Q=0．088的照明效果,与预期结果基本一致。     

A NEW PHILOSOPHY FOR SPEED-CHANGE INDUCTION MOTORS

ABSTRACT

A new concept termed ‘phase shift modification’ for the design of two-speed single-winding three-phase induction motors is discussed. Designs are classified based on the chosen phase-spread on the initial and final pole scales. A method for improving the layer factor on the final-pole connection without affecting the winding factor for the initial pole connection is also presented. Although the concept is illustrated with respect to a 8/10 pole-combination it is equally applicable to any other pole-ratio.