Table of Content

24 June 2017, Volume 37 Issue 3

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A Method of Measurement Uncertainty Evaluation for Multivariate Measurement Models

CHEN Bei;GONG Peng-wei;XIE Wen;JIANG He;MA Hong-mei;YANG Chun-tao

2017, 37(3):  1-4.  doi:10.12060/j.issn.1000-7202.2017.03.01

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A method based on GUM uncertainty framework is proposed for measurement uncertainty evaluation of multivariate measurement models. The way of specifying the coverage region of multivariate measurement models is also illustrated.

Research on Test Method of Return Loss and Near-end Crosstalk in 305m Long Cables

XU Wei;CHEN Long-quan;HUANG Zhen;MIAO Xin-yu

2017, 37(3):  5-9.  doi:10.12060/j.issn.1000-7202.2017.03.02

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Digital balanced cable，which is widely utilized in Generic Cabling System (GCS)，is the primary transmission medium. However，the universal standards and test methods are based on 90 m baseline model，and in factory the digital balanced cable is generally produced in 1 000 ft (305 m) per case，for the convenience of performance monitor and quality control on cable products，test method on 305 m long cables is an urgent need. This paper has proposed a test method of return-loss and near-end cross-talk on 305 m long cables，it mainly utilizes vector network analyzer (VNA) and impedance converter to cover the measurements of all-pairs on near-end performance testing. We also make comparison and analysis according to 90 m Channel model in TIA IEC. It proves that we can preliminarily estimate the transmission quality of the communication cables through test results of return-loss and near-end cross-talk in 305 m long cables.

Simulation of the Vortex Wave Generating based on Spiral Phase Plate

WANG Jia-xin;SHI Guang

2017, 37(3):  10-13.  doi:10.12060/j.issn.1000-7202.2017.03.03

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There are several methods to generate the vortex wave. The generating method based on spiral phase plate is an important one. This paper simulates the vortex wave generating based on the spiral phase plate. Through the simulation，the amplitude and the phase distribution maps of the vortex wave generated by covering the aperture of the horn antenna with spiral phase plate are given.

Study of Pulse Modulation Signal Power Calibration based on Spectrum Analyzer

DENG Qian-lan；CHEN Wei；XIN Kang

2017, 37(3):  14-17.  doi:10.12060/j.issn.1000-7202.2017.03.04

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Pulse modulation signal is an important signal in radar and digital communication system. The power measurement of pulse modulation signal is studied in this paper. This paper discussed and analyzed the spectrum characteristic of pulse modulation signal and proposed to measure the mean power and the peak power of pulse modulation signal with the spectrum analyzer. The sine amplitude modulation method is used to verify the power measurement result of the spectrum analyzer. The result of experiment demonstrates that power measurement on pulse modulation signal with spectrum analyzer is simple and feasible and has more precision to measure the power.

Simulation of PLL Frequency Synthesis based on ADS

WANG Feng;LIU Peng-yuan;LI Bing

2017, 37(3):  18-24.  doi:10.12060/j.issn.1000-7202.2017.03.05

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In the modern electronic equipment complex frequency source is achieved by frequency synthesis technology. Good performance of frequency synthesis system is the engineering foundation of realizing frequency synthesis. In actual synthesizer circuit，the emergence of the influencing factors such as phase noise and spurious components is inevitable. It reduces the stability of the circuit，and the output is not ideal. If it is severe it can lead to system failure. It is necessary on the basis of the actual circuit compose the system concept map. According to the characteristics of the target signal，add test objectives and projects，optimization design the phase-locked loop frequency synthesizer circuit system. Use the ADS2011 to simulate the circuit and establish the relevant circuit model. Find out the optimal point and optimize circuit by observing related parameters based on a variety of test components. Simulation of the actual signal synthesis process，improve the stability and availability of the actual circuit.

Review of Quantum Hall Resistance Using Graphene

PU Xiao-qing;WU Jing;YAN Xu

2017, 37(3):  25-30.  doi:10.12060/j.issn.1000-7202.2017.03.06

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Resistors have been widely used in electrical and electronic and other non-electric fields as important components.It is crucial to assure the metrological traceability and dissemination of their resistance values.Compared with conventional physical metrological standard of resistance，quantum Hall resistance standard is of high stability and accuracy.Both the national and defensive quantum Hall resistance metrology standards in China are based on GaAs-AlGaAs.However，extremely high requirement of the outside temperature and magnetic field is needed.It is difficult for most of metrology and measurement laboratories to reproduce such conditions.The springing up of graphene materials provides the possibility for developing a new quantum Hall resistance standard.The production method of graphene material and its quantum Hall effect are briefly described.The abroad research status of graphene quantum Hall effect is introduced，and the problems in the development of the quantum Hall resistors based on graphene material are analyzed to provide the possible beneficial reference for the development of new quantum Hall resistance standard in China.

Study on Online Monitor of Human Body Electrostatic Potential in Electrostatic Protection Area

GAO Zhi-liang;SONG Bo;WANG Ruo-jue;HE Ji-hao;LU Zi-wei

2017, 37(3):  31-35.  doi:10.12060/j.issn.1000-7202.2017.03.07

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Human body electrostatic discharge is one of the main hazardous factors in the field of  electrostatic discharge protection engineering. According to the contact measurement for electrostatic potential，this paper puts forward a online monitor  system based on RS485 bus for human body electrostatic potential，develops one type of anti-static wrist strap and its fixture used in EPA（Electrostatic discharge Protection Area） operation，and designs the specialized measurement method for device and the whole system. The test results shows that the design realizes electrostatic continuous measurement，limit alarming and record traceability，and helps strengthen the ability of electrostatic protection and online measurement in aerospace industry workshop.

Modeling and Simulation Research of Multi-phase Motor Drive System

SI Kai-bo;ZHANG Shan-wen;YANG Ya-dong

2017, 37(3):  36-40.  doi:10.12060/j.issn.1000-7202.2017.03.08

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The thesis mainly aims at studying double-Y shift 30 six-phase permanent magnet synchronous motor，which gets the mathematical model that is used for vector control by coordinate change，this thesis also analyses the application in multi-phase motor drive system of which current control strategy which takes straight axis  as control scheme meanwhile the thesis shows the vector control frame diagram. Secondly，it also analyses that under the MATLAB simulation circumstance，it set up the simulation model of its motor body control and all modules. Finally，by providing basic motor parameter and theory，calculate the parameter used in simulation and take it into simulation verification. The research shows that the control strategy which has been put forward is effective and also verifies the rationality and accuracy of the mathematical model set up and the simulation model set up，which is very helpful for drive study of multi-phase motor in the future.

Trace Method of Extinction Ratio Parameters

MIAO Xin-yu;CHEN Long-quan;HUANG Zhen;XU Wei

2017, 37(3):  41-43.  doi:10.12060/j.issn.1000-7202.2017.03.09

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The traceability of Extinction Ratio （ER） measurement of Communication signal analyzer is analyzed. The method that optical ER measurement is traced to voltage parameter is demonstrated and verified by experiment. Firstly，a digital signal transmitter with stable ER is established for measurement. Then optical detector XPDV2150R （DC-50 GHz 1 550 nm） with enough bandwidth is adopted for O/E conversion to avoid the influence of frequency response，and the bandwidth effect of optical detector and receiver on the measurement results is verified by experiments. At last，the ER of electrical signal is measured by oscilloscope whose vertical amplitude is traceable. The measurement result and the results measured by Communication signal analyzer directly is compared，and the agreement of them is verified. The ER parameter is traced to voltage parameter finally.

Research on Fault Forecasting Method of Missile Power Supply Control Unit

HUO Xiao-yun;YANG Li-feng;ZHONG Heng

2017, 37(3):  44-50.  doi:10.12060/j.issn.1000-7202.2017.03.10

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In this paper，the relay was selected as a key part by analyzing the fault modes of missile power supply control unit. Based on time series analysis，the mathematical model for fault forecasting was built，and the mathematical model was identified for super-path time and pick-up time of relays. The computing results were obtained and analyzed by comparing the model based on super-path time with pick-up time. The test device of parameter collecting was designed to simulate the loads under the actual working condition. And the forecasting result was validated by the experiment data.

Design and Implementation of a High Speed Data Link with Strong Interference Signal Rejection Ability

RONG Gang;ZHANG Sheng-yan;FENG Zhong-wei;CHEN Yu-kun

2017, 37(3):  51-54.  doi:10.12060/j.issn.1000-7202.2017.03.11

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The concept and development of the high speed data link are introduced. The whole design plan is given based on the real combat model. The system architecture and device composition are given in some details. The modularized design scheme is adopt，which make the equipment universal and miniaturization and light. The technology plan is given based on (Orthogonal Frequency Division Multiplexing，OFDM)，which solve the low elevation and anti-multipath in the high speed transmission application requirement. It is result that the whole design scheme is feasible，which can be used in the future weapon task.

Research on Servo Control Technique of Launcher Device based on Partitioning PID and Feedforward Compensation Algorithm

FAN Wen-jing;WANG Zhao-li;XIE qiang;LI Ai-ping;JIAO Zhou-bo

2017, 37(3):  55-59.  doi:10.12060/j.issn.1000-7202.2017.03.12

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Aimed at large inertia，high speed，high precision servo control requirement of launch device，a study on servo control technology based on partitioning PID and feedforward compensation algorithm is given. The technique adopts partitioning PID control algorithm，and import feedforward compensation algorithm to processing composite control，which aimed at dynamic tracking requirement of launcher device. The technique improves the dynamic and static tracking property of launcher device，which determines the satisfactory control effect.

Design of a Miniaturization Wireless Sensor Network

CAI Hui-hua;MENG Xiang-yu;SUN De-chong;WU Yong-hong;GE Meng;DAI Yi-lin

2017, 37(3):  60-65.  doi:10.12060/j.issn.1000-7202.2017.03.13

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A mini system of WSN base on the mems sensor was made by uses of zigbee technology. the temperature，humidity，pressure，acceleration of spacecraft ’s every cabin station can be test by this system. The mini WSN system’s power was supplied together by wire，this not only can reduce the volume of sensor notes，but also can convenient for the change of battery. sensor notes transmiss wirless can reduce the amount of wire cable，the wire cable layout problem and the quality of spacecraft.

Automatic Test for Voltage Controlled Oscillator

YUAN Yun-hua;CHEN Zhang-tao;ZHAO Yong-xing;JIAN Li

2017, 37(3):  66-70.  doi:10.12060/j.issn.1000-7202.2017.03.14

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Voltage controlled oscillator（VCO） is widely used in automatic control，digital instrument and radio equipment，which is used to realize the conversion between voltage and frequency. This paper based on voltage controlled oscillator AD650 structure and working principle of a detailed analysis of the RC，according to system resources test SP3160VA VLSI，proposed the automatic test of VCO implementation method，including program design，implementation methods and main parameters of the external components.

Research on Scientific Research Management Mechanism of National Defense Metrology

ZHENG Cong-wei;HU Yi-fei;FENG Ying-qiang;LIN Min;MA Hong-mei;KAN Jin-song;LIU Min;ZHANG Jiang-qiao

2017, 37(3):  71-76.  doi:10.12060/j.issn.1000-7202.2017.03.15

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 This paper introduces the circumstances of basic scientific research innovation mechanism，investment and budget management，evaluation system，talent training method of the Defense Advanced Research Project Agency（DARPA） and Max Planck Institute（MPI）. Also it introduces the management history，status and existing problems of the national defense metrology scientific research，and analyzes the confronting situation. In order to practice the Thirteenth Five-year metrology scientific research plan completely，we should further perfect the scientific research management mechanism，normalize management behavior，increase national investment benefit，promote independent technology innovation，enhance achievements popularized and applied，promote scientific research level，and provide powerful support to the scientific research and production of weapons and building of the advanced national defense science and technology industry system.

Thinking of the Quality Control of Military Trade Products

LIU Rong

2017, 37(3):  77-80.  doi:10.12060/j.issn.1000-7202.2017.03.16

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Through analysis of quality-related work of military trade products，this paper describes the present situation and problems of the quality control of military trade products，and gives the suggestions including promoting product type spectrum and maturity management，reinforcing metrological assurance，making product realization planning carefully，strengthening product supply chain management，and developing integrated support engineering，to serve as a reference.