中国科学院机构知识库网格系统: 检索

Detection and analysis of Galileo signal in space anomalies from 2017 to 2018 期刊论文 OAI收割
IET RADAR SONAR AND NAVIGATION, 2020, 卷号: 14, 期号: 11, 页码: 1690-1696
作者: Fan, Lihong; Tu, Rui; Zhang, Rui; Han, Junqiang; Zhang, Pengfei

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收藏 | 浏览/下载：33/0 | 提交时间：2021/11/29

distance measurement error analysis satellite navigation aircraft landing guidance radio receivers Galileo signal space anomalies broadcast ephemeris user navigation SIS anomaly advanced receiver autonomous integrity monitoring precise ephemeris SIS error healthy Galileo satellites corresponding detection thresholds satellite SIS anomalies satellite clock error SIS stability time 7 0 hour time 2 5 hour time 50 0 hour time 4 5 hour

Augmented fixed-time observer-based continuous robust control for hypersonic vehicles with measurement noises 期刊论文 OAI收割
IET CONTROL THEORY AND APPLICATIONS, 2019, 卷号: 13, 期号: 3, 页码: 422-433
作者: Sun, Jinlin; Yi, Jianqiang; Pu, Zhiqiang

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收藏 | 浏览/下载：71/0 | 提交时间：2019/07/12

linearisation techniques observers control system synthesis vehicle dynamics adaptive control aircraft control uncertain systems robust control variable structure systems space vehicles augmented fixed-time observer measurement noises cruise control flexible air-breathing hypersonic vehicles controller gains finite-time convergence fixed convergence time FAHV gain adaptation law continuous robust control input-output linearisation technique

A study of elevated pollution layer over the North China Plain using aircraft measurements 期刊论文 OAI收割
Atmospheric Environment, 2018, 卷号: 190, 页码: 188-194
作者: Liu, Q (Liu, Quan)[ 1,6 ]; Zhao, CS (Zhao, Chunsheng)[ 5 ]; Huang, RJ (Huang, Rujin)[ 4 ]; Liu, DT (Liu, Dantong)[ 2,3 ]; Zhou, W (Zhou, Wei)[ 1 ]

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收藏 | 浏览/下载：104/0 | 提交时间：2018/11/20

Elevated Pollution Layer Aircraft Measurement Regional Transport Vertical Mixing North China Plain

A study of elevated pollution layer over the North China Plain using aircraft measurements 期刊论文 OAI收割
Atmospheric Environment, 2018, 卷号: 190, 页码: 188-194
作者: Zhao, CS (Zhao, Chunsheng)[ 5 ]; Huang, RJ (Huang, Rujin)[ 4 ]; Liu, DT (Liu, Dantong)[ 2,3 ]; Zhou, W (Zhou, Wei)[ 1 ]; Sheng, JJ (Sheng, Jiujiang)[ 1 ]

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收藏 | 浏览/下载：57/0 | 提交时间：2018/11/21

Elevated pollution layer Aircraft measurement Regional transport Vertical mixing North China plain

LES Study of Flame Stabilization in DLR Hydrogen Supersonic Combustor with Strut Injection 会议论文 OAI收割
Xiamen, China, 6-9 March 2017
作者: Wu K(吴坤); Zhang P(张鹏); Yao W(姚卫); Fan XJ(范学军); Zhang, Peng(pengzhang.zhang@polyu.edu.hk)

收藏 | 浏览/下载：29/0 | 提交时间：2018/01/16

Combustion Diesel Engines Hydrogen Large Eddy Simulation Spacecraft Stabilization Supersonic Aircraft Temperature Measurement Wall Flow

Measurements of vertical and horizontal distributions of ozone over Beijing from 2007 to 2010 期刊论文 OAI收割
ATMOSPHERIC ENVIRONMENT, 2013, 卷号: 74, 页码: 37-44
作者: Quan, JN (Quan, Jiannong)[ 1,3 ]; Chen, PF (Chen, Pengfei)[ 1,2 ]; Huang, MY (Huang, Mengyu)[ 1,3 ]; Li, X (Li, Xia)[ 1,3 ]; Gao, Y (Gao, Yang)[ 1,3 ]

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收藏 | 浏览/下载：20/0 | 提交时间：2018/12/05

Ozone Vertical Profile Horizontal Profile Aircraft Measurement Beijing

High accuracy star image locating and imaging calibration for star sensor technology (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者: Wang Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

Today aircraft attitude measurement technology plays an important role in an aircraft system because it can provide orientation for aircraft in action. Lately star sensor technology used in aircraft attitude measurement has become more and more popular because of its high accuracy light weight without attitude accumulation errors and other advantages. There are three main steps for star sensor to measure aircraft attitude star image locating star identification and attitude tracking. The latter two steps are based on the accuracy of star image locating. So it's critical to make efforts to advance the accuracy of star image locating. Some imaging errors such as spherical aberration or coma aberration also have negative effect on the accuracy of star image locating of which the effect is necessarily reduced as well. At the beginning of this article the structure of star sensor hardware is introduced. Secondly three methods for star image locating are described specifically which are traditional centroid method Gauss quadric fitting method and improved Gauss quadric fitting method. Subsequently an imaging calibration method is described for the purpose of reducing the effect of imaging errors. Finally the experiment shows that the accuracy of the star sensor is 2-arc-second. 2010 SPIE.

Design of high precision star image locating method used in star sensor technology (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Sun H.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：55/0 | 提交时间：2013/03/25

Nowadays star sensor technology used in aircraft attitude measurement has become more and more popular for its high precision light weight without attitude accumulation errors and other advantages. In order to enhance the accuracy of star sensor it is critical to make efforts to promote the precision of star image locating. High precision star image locating method mentioned in this article includes two aspects. One is sub-pixel dividing algorithm used to acquire the coordinate of stars. The other one is imaging calibration method used to weaken the effect caused by imaging distortion. This method is finally realized in some type of star sensor system. Then an experiment is designed to verify the precision of the method. The result of the experiment shows that the precision of the method is 2" in the experimental environment. 2010 IEEE.

The method on the measurement of the aircraft attitude by the spatial cosines relationship of the single station and planes to the intersection the multi-station of electro-optical theodolite (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Zhao L.-R.; Cao Y.-G.

收藏 | 浏览/下载：16/0 | 提交时间：2013/03/25

In order to realize the aircraft attitude measurement The paper advances electro-optical theodolite methods of measuring the aircraft attitude by using the spatial cosines relationship the single station theodolite and how to use intersection of the multi-station theodolite. The single station theodolite was introduced in a measured distance from the aircraft posture information. An exhaustive approach was used to access to the aircraft axis of the feature points and the location in the space was used to obtain space posture parameters. The multi-station theodolite was introduced to get the information of the aircraft flight attitude by method of using planes to the intersection. Two-dimensional image to obtain objective axis by fitting algorithm using Hough transform. And then Calculate the vertical distance of the origin to the target of the central axis and the origin to the target of the central axis of the angle between the normal and the X-axis obtaining the linear equation in the two-dimensional plane. Two-dimensional axis of the target image and the camera system's optical center only identified a space plane. The aircraft yaw axis angle and pitch angle can be obtained by getting the space axis using plains to the intersection method. Experimental results show that attitude angle error of the single station theodolite is less than 1 when its distance is less than 6000m and attitude angle error of the multi-station theodolite is less than 0.6 when its intersection angle is between 30 and 150. In this paper according to test result of precision comparing the mathematical model is correct and the algorithm is reasonable in extracting effective parameters of the aircraft's attitude. 2010 IEEE.

Vertical wavenumber spectra of atmospheric ozone measured from ozonesonde observations 期刊论文 OAI收割
Advances in Space Research, 2009, 卷号: 43, 期号: 9, 页码: 1364-1371
Yuan, W.; Xu, J. Y.; Wu, Y. F.; Bian, J. C.; Chen, H. B.

收藏 | 浏览/下载：38/0 | 提交时间：2014/04/30

Ozonesonde measurement Ozone and ozone spectra Gravity waves and saturation models Dominant vertical wavelength gravity-waves commercial aircraft universal spectrum middle atmosphere temperature saturation winds stratosphere climatology variability