径向速度

径向速度测量在Kalman滤波中的应用

Use of Radial Velocity Measurements in Kalman Filter

改善正侧视机载PD雷达检测低径向速度目标性能研究

Research on improving detection performance of side looking airborne pulse Doppler radar for targets with low radial velocity

作者首次采用了mixture模型对空气柱进行了模拟，模拟效果良好。对液流而言，切向的数量级最大，轴向速度次之，径向速度最小。

Author chooses the " mixture " moder to simulate the air core and the effect of simulation is good .

研究了一种把径向速度测量引入推广Kalman滤波（EKF）的新方法。

A new algorithm is developed to incorporate the radial velocity measurement into extended Kalman filter .

研究在距离和径向速度测量噪声统计相关的情形下把径向速度测量引入Kalman滤波的新方法。

A new algorithm is developed to incorporate the radial velocity measurement into Kalman filter in the case of correlation between range and radial velocity measurement noises .

径向速度Vr主要由循环风量来确定，径向速度Vr的增加有利于粗粉向中心的转移，对粗产品的分级有利。

Vz is mainly determined by recirculating air , and increase in Vz can promote centralization of coarse fines , thus favorable for fractionation .

首先，本文概述了一些典型流场、天气系统的PPI多普勒径向速度模式。

First , the characteristics of Doppler velocity PPI for some typical streamline field and synoptic system were summarized .

研究了在脉间变频格式目标雷达散射截面（RCS）测试中目标径向速度对测试结果的影响。

Object 's radial velocity effect on object 's radar cross section ( RCS ) outdoor measurement with pulse to pulse frequency shifting radar was researched .

本文针对多种情况进行了分析，以正确识别单多普勒径向速度PPI图像中的有用信息。

Many instance are analysed in this paper , which can help users identify the useful information from Doppler velocity PPI pictures .

应用模式中的分析方法，分析了吉林省2003、2004年层状云（稳定的积层混合云）、对流云（暴雨、冰雹）降水PPI多普勒径向速度分布特征。

The distribution characteristics of the sheet continuous precipitation , convection cloud precipitation Doppler velocity PPI in Jilin province in 2003-2004 were analyzed .

采用DANTEC公司的三维激光动态粒子分析仪（DualPDA）测定了大喷嘴间距同轴对置两流股及四流股撞击后的径向速度分布。

The radial velocities of wide spaced two jet and four jet impinging streams have been measured by Dual PDA with different nozzle diameters and primary velocities .

我们对两种不同直径的S型血管进行了有限元模拟计算，得到三种结果：在对称面内不同时刻的轴向速度vφ和径向速度vr的合成矢量；

Three kinds of results are obtained by simulation calculating the two models : the composed vector diagrams of the axial velocity ( v ) and the radial velocity ( vr ) at the different times in the symmetry section ;

为避免通常PD处理时的多普勒展宽以及多普勒滤波器分辨率不够等问题，由时域相关函数法估计波束中心径向速度信息。

In order to avoid problems such as Doppler broadening and inadequate resolution of Doppler filter in usual PD process , radial velocity information of the center beam is estimated by correlation function method in time domain .

基于模糊PID复合控制策略设计了压偏量模糊PID复合控制器，通过合理地选择控制器来有效调节径向速度所对应的控制电压，提高了压偏量的控制精度和跟踪测量过程的平稳性。

The sampling precision is enhanced with the improved algorithm . A fuzzy-PID compound controller is designed based on the fuzzy-PID compound control strategy . The suitable controller is selected to regulate the corresponding control voltage of the radial velocity effectively .

利用CFD软件Fluent对涡流内流场进行数值模拟，获得了切向速度、轴向速度和径向速度的分布及流线形态。

CFD code " Fluent " is appealed to mapping the flow fields , and the results give the distributions of tangential velocity , axial velocity , radial velocity and the pattern of flow streamlines .

两个不同的蒙特卡罗仿真表明，通过采用这一新算法引人径向速度测量，不仅可以大大提高状态估计的精度，而且其估计性能和计算效率优于传统的EKF。

Two different Monte Carlo simulations show that the new algorithm cannot only improve state estimation accuracy but also is superior to EKF in estimation performance and computation efficiency .

利用单多卜勒雷达径向速度的PPI资料，使用模式识别技术自动探测台风中心。

Based on a PPI of radial wind data from a single Doppler radar with double PRF technique , model recognition technique is utilized to detect center of typhoon automatically .

风场信息提取。在本平台中，相参积累在一片DSP中进行，径向速度时域平均及风场信息提取在计算机后处理中进行，其他在另一片DSP中进行。

In this platform , the coherent accumulation is fulfilled in one DSP chip , the temporal averaging of the radial speed data and the wind information calculation are performed in the computer , while the other steps are fulfilled in another DSP chip .

天文学家是通过位于智力的欧洲南方天文台高精度径向速度行星搜索器（HARPS）发现该行星的。

Astronomers found the planet using the European Southern Observatory 's High Accuracy Radial velocity Planet Searcher , or HARPS , instrument in Chile .

研究在LFM信号波形下把径向速度测量引入Kalman滤波的新方法，分析了LFM信号波形下距离和径向速度测量的统计特性。

A new algorithm is developed to incorporate radial velocity measurement into a Kalman filter for the LFM signal waveform . An analysis is given about the statistical properties of the range and radial velocity measurements .

实验证明了在目标径向速度相对雷达平台航向速度不是很大、目标聚焦良好的情况下，ATI动目标检测方法的有效性。

The validity of ATI-GMTI is verified when the target 's radial velocity is not too big relative to the spacecraft and targets are well focused .

本文进行的主要工作如下：1.从机载SAR平台与运动目标空间位置关系出发，分析了运动目标径向速度和方位向速度对SAR成像的影响。

The main work of the paper is as follows . 1 . According to the position between the moving target and the airborne SAR platform , the paper studied the effect to the SAR image because of the radial and azimuth velocity of moving target . 2 .

高精度径向速度行星搜索器（HARPS）完成了这次发现。HARPS是欧洲南方天文台（国际性天文研究机构）安装在智利拉西亚天文台的。

This discovery was made by The High Accuracy Radial Velocity Planet Searcher ( HARPS ), which is installed at the European Southern Observatory 's La Silla Observatory in Chile .

运用多普勒雷达的基本反射率（R）、风暴相对径向速度（SRM）、垂直积分液态含水量（VIL）等产品，分析了2004年6月20日华北南部罕见的冰雹大风天气过程。

By using the Doppler radar echo about Base Reflectivity ( R ), Storm Relative Vel Map ( SRM ), Vert Integrated Liquid ( VIL ) etc , a severe hail and wind weather process which occured in the south of North China on June 20,2004 is analyzed .

模拟结果显示各喷嘴加捻室中的气流旋转特征非常明显，并随着喷孔角度的增大，A-A截面的切向速度和径向速度增大，而轴向速度减小。

Simulation results show that , the rotating characteristics of the air in the twisting chamber were very obvious . With the spray angle increased , the tangential velocity and radial velocity increased , but the axial velocity was decreased .

提出了利用IRST系统的两个探测波段进行目标定位的单站测距算法，建立了系统的测量模型，推导出了相应的定位公式及径向速度公式，并对定位误差进行了系统分析。

A method of single observer ranging based on double bands of IRST system is presented . The measurement model is established , on which it is given that the ranging formula and the formula of the velocity at the direction to the station of the target .

一个国际科学家团队发现了这颗行星，他们一直通过从欧洲空间天文台高精度径向速度行星探测器（HARPS）得到的数据进行研究。该仪器负责探测表明行星经过轨道的恒星亮度变化。

The planet was found by an international team of scientists who have been studying data from European Space Observatory 's High Accuracy Radial velocity Planet Searcher ( HARPS ) instrument which looks for regular changes in brightness of stars , which suggests a planet is passing by in orbit .

本文用LDV测量了最优工况和小流量工况下，输送运动粘度为48mm2／s高粘油时，蜗壳第Ⅳ、Ⅵ和Ⅷ断面内的时均切向、径向速度。

Tangential and radial components of time-averaged velocity in section ⅳ,ⅵ and ⅷ of a volute of centrifugal pumps pumping high viscous oil with viscosity 48mm2 / s were measured using LDV at best efficiency and part loading points , respectively , in the paper .

高耦合系数条件下径向速度估计的新方法

A New Method of Radial Velocity Estimation for High Coupling Coefficient

径向速度随β角增加而近似线性减小。

The radial velocity approximately linearly decreases with β angle increasing .