Table of Content

24 August 2017, Volume 37 Issue 4

Previous Issue    Next Issue

Relative Position and Attitude Measurement for Non-Cooperative Spacecraft based on Binocular Vision

SUN Zeng-yu；GAO Yue

2017, 37(4):  1-6.  doi:10.12060/j.issn.1000-7202.2017.04.01

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

A method based on multi-feature fusion was proposed to measure the relative position and attitude for non-cooperative spacecraft. The method solved the problem of no cooperative object in position and attitude measurement by extracting the characteristic information of the Spacecraft self,such as ellipse, corner. In order to validate the method,the non-cooperative target position and attitude measurement experiment aimed at the typical satellite model was carried into execution .Experiments show that the porposed method can recognize object successfully and locate the object accurately.

Development of Hollow Cube Corner Retroreflector of Panel Structure

SUN Fang-jin；WANG Lei；MENG Qing-sheng；ZHANG Zhong-wu

2017, 37(4):  7-11.  doi:10.12060/j.issn.1000-7202.2017.04.02

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

In the long distance measurement, especially a distance up to one kilometer, cube corner retro-reflector (CCR) is almost the only feasible reflection device. The demand of long distance measurement is the augmented clear aperture of the CCR, in order to catch the target and augment the energy of the reflex. Along with the augmenting clear aperture, the whole CCR in common use and other columnar hollow CCR in overseas augment evidently the volume and weight of the clear aperture，which works inconvenient use and difficult technics. A panel structure is adopted for solution. After some experimentation, hollow cube corner retro-reflector of panel structure, which has 80mm clear aperture, has one kilometer working distance upwards. The parallel between its emitting light and its incident light gets to the second of the angle unitage. The volume and weight are becoming acceptable, and the technics can be reduced difficulties.

Study of Test Method for Grid Fin Thermal Protection Based on Arc-heated Wind Tunnel

LIU Bin；WANG Chen；ZHANG Hong-jian；ZHANG Ling；WANG Kun-peng

2017, 37(4):  12-15.  doi:10.12060/j.issn.1000-7202.2017.04.03

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Because the thickness of a solo grid wall is too small to measure the cold-wall heat flux, a new grid fin thermal protection test method by simulate free stream parameters directly is founded to validate the thermal protective structure. The new method can accurate examine the thermal protective scheme and provide valuable reference to similar test.

Design of Image Space Scanning System with Tilt Mirror for Cooled Medium Wave Infrared Optical System

LIN Sen；CAI Wei；WEI Xiao-lin；CHANG Hong

2017, 37(4):  16-19.  doi:10.12060/j.issn.1000-7202.2017.04.04

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

In basic form of image space scanning optical system, the complex rotating mechanism is necessary for driving the lens to do two-dimensional scanning, thus the bearing load on the rotating mechanism is large. The basic form of image space scanning system is analyzed，and a new form of scanning is proposed ,in which a tilt mirror is added. The new system has the advantages of much smaller load on the rotating mechanism, higher scanning speed, more simple structure and smaller size. With the tilt mirror added, the image space scanning optical system has new restriction as well as original characters. The new form of image space scanning system is discussed, the design condition and method are proposed，and the design of an image space scanning system with wide FOV is introduced.

Mutual Coupling Error Analysis and Compensation Technique of Three-axis Tracking During Zenith Pass

XIE Bang-fu；YANG Dong-dong；YANG Guo-min

2017, 37(4):  20-24.  doi:10.12060/j.issn.1000-7202.2017.04.05

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Both the blind zone and the widely employed structures of antenna pedestal in satellitic tracking during zenith pass are briefly reviewed, algorithm for program tracking of three-axis tracking system is derived theoretically. Aiming at no-blind zone tracking system by A+E+TIL structure, influence on tracking performance by mutual coupling during zenith pass is analyzed. A solution is presented, and simulation results show it could effectively improve the accuracy of tracking system.

Application and Development of Hyperspectral Imaging Technology

ZHOU Yang；YANG Hong-hai；LIU Yong；LIN Sen

2017, 37(4):  25-29.  doi:10.12060/j.issn.1000-7202.2017.04.06

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Several advanced foreign  hyperspectral imaging loads, as well as the hyperspectral imagers in GF-5 are introduced, which have been widely used in resource prospecting and environment monitoring, for the great progress of spectral resolution, spatial resolution and imaging quality. The features of Offner push-broom imagers and Dyson push-broom imagers are analysed while the staring-type hyperspectral imagers are expected to play an important role in the future. A kind of MIR hyperspectral imager based on acousto-optic tunable filter(AOTF) is introduced, which provides satisfactory spectral and spatial effect.

Design of Digital Temperature Control System for Chip-scale Atomic Clock

HU Er-meng；LIU Rui-yuan；ZHAO Jian-ye

2017, 37(4):  30-34.  doi:10.12060/j.issn.1000-7202.2017.04.07

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

With the proposal of the Micro-PNT（Micro-Technology for Positioning, Navigation and Timing）by United States Department of Defense Advanced Projects Research Agency(DARPA) and the development of unmanned technology, the market of chip-scale atomic clock has attracted much attention.Stability is a key parameter of the performance of chip-scale atomic clock, which is affected by the accuracy of temperature control, so a high accuracy temperature-control system is very essential to the stability of chip-scale atomic clock.  A digital temperature-control system with high accuracy is designed，and its precision is 2mK. The test results show, the stability of chip-scale atomic clock is greatly improved from 7.57×10^-12to 4.99×10^-12, which is in a world level.

Research and Design of a Load Test System for Connecting Rod Device

LIU Yu-bei；DING Wen-qi；YIN Wei；WANG Zhi-cheng；ZHANG Jian

2017, 37(4):  35-39.  doi:10.12060/j.issn.1000-7202.2017.04.08

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

A load testing system of connecting rod device is introduced. The type of three fulcrum indeterminate bundled is used in connecting the core stage with booster of the large rocket. In order to fully research the load variation of this new type of connecting rod structure in large-scale ground test and pre launch loading process, the load monitoring system of binding link is developed and designed. Multi-channel data acquisition system is used by multi-channel analog switch and scanning technology. At the same time, the data acquisition and data processing software are programmed to analyze and process the collected voltage signals. The load is acquired through the calibrated system. Not only the principle of the hardware and the software but also the two working state are introduced in the paper .Through calibrating connecting rod on the rocket, the relationship between the force of the connecting rod and the output of the system is acquired. Through the standard load test, the linear error is controlled into the allowable range of the system. The load measurement system is accurate, which can be used to measure the load of the connecting rod in the large scale test of the rocket.

Research on Measurement Method of Mass Eccentric about Servo-assisted Revolving Platform of Infrared Seeker

LIU Kai；ZHAO Tian-cheng；WANG Tao；HE Suo-chun

2017, 37(4):  40-42.  doi:10.12060/j.issn.1000-7202.2017.04.09

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

The generation for mass eccentric about servoassisted revolving platform of infrared seeker is researched, and a new concise equivalent measurement algorithm is excogitated by building mechanical model.this measurement greatly simplified the former complex measuring process,and can be applied widely.

Telemetry Acquisition Platform Design Based on VPX Standard

HU Qian；CHEN shan-zhi；LIU jian-tuo；LI Jin-long；ZHANG de-zhi

2017, 37(4):  43-48.  doi:10.12060/j.issn.1000-7202.2017.04.10

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Countries around the world are developing Spacecraft TT&C. But the great variety of TT&C equipment has complex connection relationship. Against system miniaturization, low power design. It is difficult to meet the needs of the design of new aircraft. For TT&C system integration, miniaturization, high reliability requirements, the VPX standard is studied, and applied to the design of telemetry acquisition platform. It verifies the feasibility of using VPX standard. VPX has broad prospects for development in the Spacecraft TT&C.

Research of the Application of New Network Technology AFDX in Design of Launch Vehicle Measurement System

WANG Dan；WAN Duan-hua；LI Wei；LU Juan；WANG Ning

2017, 37(4):  49-53.  doi:10.12060/j.issn.1000-7202.2017.04.11

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Cables from one point to another point were used to transmit signals in traditional launch vehicle measurement system, which had disadvantages in terms of complex thread, large space, heavy quality, low speed of communication and so on. The application of new network technology AFDX in design of launch vehicle measurement system is presented as an idea to solve the problems. The new network technology AFDX based on Ethernet is introduced，while its characteristics and key technologies are researched and compared with other network technologies. The topology of data integration is explored for launch vehicle measurement system based on AFDX, which may provide basis for constructing a launch vehicle measurement system with higher dependability, flexibility and speed of communication.

Research of Calibration Technology for the Electronic AC Load

HAO Zhi-kun

2017, 37(4):  54-60.  doi:10.12060/j.issn.1000-7202.2017.04.12

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

The calibration method, calibration device and calibration features of the electronic AC load are introduced. The electronic AC load is the main device for the AC source and UPS source testing and agingtest. The features of AC load are important for testing and analysing the trouble of device. The calibration method of the constant voltage,constant curent,constant resistant and constant power of the AC load are introduced. The AC load is tested.The measurement uncertainty is also analysed.The result shows that the method in this article can meet the demands of AC load.

Application of Image Enhancement Algorithm  in Aerospace Image Measurement

WANG Ning；SONG Rui；WANG Ying；LU Juan；WANG Dan

2017, 37(4):  61-65.  doi:10.12060/j.issn.1000-7202.2017.04.13

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Image measuring technology is an important component of rocket telemetering. A very simple and effective image enhancement algorithm is proposed in rocket image measuring. Many images which are lack of lightness are analyzed, the algorithm based on weak lightness pixel model is proposed. The global optimal algorithm is used for separate the weak lightness model by solving a liner sparse matrix. The fine image by this method can getted, which is used for the pattern recognition and processing.

Space Rubidium Atomic Clock Frequency Characteristic Satellite-Ground Measurement Technology

JIANG Dong-sheng；WU Le-qun；WANG Ying；GAO Zhen-liang

2017, 37(4):  66-70.  doi:10.12060/j.issn.1000-7202.2017.04.14

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Four methods which are based on acquiring frequency character of rubidium clock in orbit SatelliteGround measurement are proposed, including one way time difference antitheses, two way time difference antitheses, time difference antitheses via GPS, time difference antitheses by using laser. The theory of all the four methods is analyzed. The test design and results of rubidium clock which was a payload of breeding satellite are introduced.

Research of Switching Time Characteristics Based on Aerospace-used Decoders

LIU Hui；HAN Xiao-dong；ZHANG Hao-yuan；WANG Zhe

2017, 37(4):  71-75.  doi:10.12060/j.issn.1000-7202.2017.04.15

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Aerospace-used decoders need to guarantee not only the basic decoding function, but also the switching time characteristics including transmission delay and output switching time to meet the application requirement in the complex electrical environment. The the switching time parameters of every output pin in cases of different output loads and input voltages are tested. The test result shows that the max transmission delay of the decoder is 2.1214μs, the max output transmission time from high voltage to low voltage is 1.6769μs and the one from low voltage to high voltage is 8.1214μs. The switching time characteristic parameters decrease with the input voltage increased, and increase with larger load capacitance.This research provided an effective trend judgment and data support for design in a complex electromagnetic environment conditions.

Analysis and Test of Power Cable Peak Signal for Inductive Load

XIA Wei；SUN Chao-bin；Sheng Xiao-qing；Yu Qing-hua；Wang Zhi-hu

2017, 37(4):  76-81.  doi:10.12060/j.issn.1000-7202.2017.04.16

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

For the inductive load, in the experiment of the power cable peak signal, it is a hard problem for catching the peak value. Through the analysis of inductive load’s dynamic characteristic in the switching, the formation mechanism and impact factor for power cable peak signal were studied. And on this basis, alternative method for power cable peak signal was put proposed in the condition of direct-current measurment. The alternative method is in accordance with theory by the result of simulation and experiment，which can be used to solved the random problem for the peak value with a standard method, extremely compressed the dynamic range of the peak value, and effectively lowered the risk level in the test process. There is a reference value for the measurement and analysis of power line conductive disturbance.

Processing Equipment Design for Satellite Far Field Wireless Tests

XU Bo-tao；LV Jing-hui；ZHU Wei；LIU Zhe；DAI Wei-bing；CHEN Da-meng

2017, 37(4):  82-87.  doi:10.12060/j.issn.1000-7202.2017.04.17

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

User equivalent ranging error(UERE) of navigation satellites based on broadcast message is affected by a number of factors. Multiple-path effect is one of the major contributor to the error of pseudo range. Experiments and tests are needed to determine that how error of pseudo range is connected to the shape of a satellite, and to verify how to lessen multiple path effect by re-arranging the outer structure of a satellite, such as solar arrays or antennas. A series of equipments and infrastructure are built according to the technical conditions of the experiments. By means of the critical function of the equipment, the satellite far-field wireless tests are completed, the level of pseudo range error is finally determined in typical conditions. It is significant for satellite navigation error analysis and for enhancing the positioning accuracy.

Comparison of Quantity Value of the Standard Ground Radioactivity Measurement Model Device in China

LIU Shan-shan；ZHANG Chang-xing；DU Xiao-li；HU Ming-kao；OU Yang-you

2017, 37(4):  88-94.  doi:10.12060/j.issn.1000-7202.2017.04.18

Asbtract ( )   PDF (25475KB) ( )  

Related Articles | Metrics

Radiation Survey Metering Station of Nuclear Industry leaded four metering stations of southwest, central south, south China and east China implement domestic ground radioactive measurement model quantity trace ability of standard device in 2015. Aimed at ground radioactivity survey standard model of Radiation Survey Metering Station of Nuclear Industry, see from the normalized deviation analysis of the comparison results, only in the model YM1 which has low potassium concentration and the model YM3 which potassium concentration is controversial, normalized deviation is greater than 1 in individual instruments, it means that process is rigorous, the method is correct, and the result is credible. From the measuring result and nominal value comparative analysis, the expected relative deviation is within 5%, except for the model YM1 and YM3, The results indicate that the ground model of Central station value is stable.