Table of Content

01 April 2021, Volume 41 Issue 2

Previous Issue    Next Issue

Review on Telemetry over Internet Protocol

LUO Yu-bin, LI Hong, ZHOU Guang-ming, LU Juan

2021, 41(2):  1-7.  doi:10.12060/j.issn.1000-7202.2021.02.01

Asbtract ( )   PDF (775KB) ( )  

Related Articles | Metrics

Telemetry over Internet Protocol (TMoIP) technology is the focus of international telemetry in the past decade, with the goal of gradually transitioning the existing ground telemetry network transmission from the pulse code modulation (PCM) system to the IP system. On the basis of a brief introduction of TMoIP concepts and categories, the development process and research status are sorted out, and the technical implementation and technical points are described in detail by using TCP/IP five-layer model. With the introduction of TMoIP technology, the transmission performance of the ground telemetry network is improved and an important reference for the development of the next generation telemetry system is provided.

Research in Calibration Methods of FBG Demodulator

Wang xintong, Li shandong, Zheng Guangjin, Gao yesheng, Zhao yao, Shang fuzhou

2021, 41(2):  8-12.  doi:10.12060/j.issn.1000-7202.2021.02.02

Asbtract ( )   PDF (886KB) ( )  

Related Articles | Metrics

This paper analyzed the working principle, framework and application of FBG(Fiber Bragg Grating) sensor demodulating system and its working principle diagram, the importance of calibration is given definitely. A thought is given to design the calibration transmission of FBG demodulator which is taking the F-P (Fabry-Pero) Etalons as the core. It writes programs using LabVIEW development environment to realize wavelength scanning as well as combines with tunable laser and optical power meter to complete survey. Wavelength range of calibration transmission is 1520nm~1570nm, its uncertainty of measurement is 2.4pm(k=2) and its monthly stability of wavelength is1.5pm.

Research on the Calibration Method of the Surface Microphone Dynamic Characteristic Parameter

2021, 41(2):  13-17.  doi:10.12060/j.issn.1000-7202.2021.02.03

Asbtract ( )   PDF (825KB) ( )  

Related Articles | Metrics

The calibration method and application of the microphone will be described. A focus description of the surface microphone dynamic characteristic parameter calibration method will be given. The calibration methods of the surface microphone will be developed, such as frequency response, linearity and directivity. The calibration results will be analyzed and verified.

Research on an open resonator for plasma diagnosis

Tu Yihang, Ge Meng, Li En, Miao Yinxiao , Li Ji, Xi Jinglei, Zhang Yunpeng

2021, 41(2):  18-24.  doi:10.12060/j.issn.1000-7202.2021.02.04

Asbtract ( )   PDF (5082KB) ( )  

Related Articles | Metrics

This paper presents an open resonator design for plasma diagnosis. The resonator consists of a high-Q resonator and a point focused antenna, which are combined by a strong coupling hole. Part of the energy of the high-Q resonator radiates from the strong coupling hole to the antenna, and the radiation energy is concentrated in the plasma layer through the point focusing antenna. The change in the plasma electron density causes the change in the reflection coefficient of the antenna, which interacts with the high-Q resonant cavity to cause changes in the resonant frequency and Q value. The experimental results show that with the increase of plasma electron density, the resonant frequency and Q value of the resonator show an upward trend, so it can be used to realize non-contact detection of plasma electron density.

Design of Cascading Style Comprehensive Verification Device for Hydraulic Pressure Gauge

Kou Qiongyue, Wang Peng, Wang Haomiao

2021, 41(2):  25-30.  doi:10.12060/j.issn.1000-7202.2021.02.05

Asbtract ( )   PDF (2296KB) ( )  

Related Articles | Metrics

The Abstract Hydraulic pressure gauge is designed by the comprehensive verification device of the hydraulic pressure gauge,and based on cascading verification model.It's discussed the mechanism and the control program of the verification process, such as the efficient and precise generation and control of gas-induced liquid pressure. The technical design of the component which uses gas to induce liquid pressure and the design of automatic verification software structure. After experimental testing, features of the device include higher pressure-generation speed, higher precision and greater stability. It can be realized quick and automatic verification of different hydraulic pressure gauge simultaneously. The equipment can be classified as grade-0.05, and the efficiency increases 5 times as compared with the manual verification.

Influence of Flange and Insertion Depth on Coaxial Probe Test

Zhang Jintao, Peng Yitong, Gao Chong, Zhang Tieli, Miao Yinxiao, Ge Meng, Miao Run, Li En

2021, 41(2):  31-37.  doi:10.12060/j.issn.1000-7202.2021.02.06

Asbtract ( )   PDF (3020KB) ( )  

Related Articles | Metrics

In recent years, open ended coaxial probe has been widely used in the electromagnetic properties of solid, liquid, biological tissue and other materials. For different materials, the requirements for testing the strength of probes are different. Therefore, it is necessary to add a flange at the end of the probe to enhance its strength. In addition, for liquid samples and biological tissue testing, there are usually different requirements for insertion depth. Based on the radiation model of coaxial open circuit probe and HFSS simulation, this paper analyzes whether the probe terminal with flange or not and the probe insertion depth have little influence on the test accuracy. In the experiment, the coaxial open-circuit probe with or without flange and different insertion depth of the same liquid were tested. In the frequency range of 1-18GHz, the data show that the deviation of the measurement data of the complex permittivity of the sample with or without flange is less than 10%, and the data of different test depths are almost identical.

Study and Application of Modularize Model Library of Launch Vehicle Attitude Control System

Yu Yifan, Tao Jiuliang, Wang Chen, Ma Cheng, Peng Bo

2021, 41(2):  38-42.  doi:10.12060/j.issn.1000-7202.2021.02.07

Asbtract ( )   PDF (920KB) ( )  

Related Articles | Metrics

To solve the contradiction of urgent tasks and the construction of simulation system which is long-periodic and low-reusable in the context of high-density emission, this paper proposed the modularize model technology of launch vehicle attitude control system oriented flight performance simulation. With the modularity, hierarchical and standardized modeling approach, a control simulation system could be constructed by modular assembling. The reusability and technology maturity of control system simulation model has been improved by configuring the key simulation parameter flexibly.

Research On Verification Method For Temperature Measurement Accuracy of Thermal Reflection Temperature Measurement System

DING Chen, ZHAI Yuwei , LIU Yan , ZHENG Shiqi, WU Aihua

2021, 41(2):  43-48.  doi:10.12060/j.issn.1000-7202.2021.02.08

Asbtract ( )   PDF (2892KB) ( )  

Related Articles | Metrics

A verification method was provided to solve the problem that the verification result of the temperature measurement accuracy of the thermal reflection temperature measurement system was not accurate. The Verification of resistance standard was fabricated by semiconductor process, which build thin-film resistor on Si substrate. The thin-film resistor was made by Au. The Verification standard was developed by making fixture and bonding the thin-film resistor to the fixture. The temperature coefficient of the resistor was tested by the temperature control platform at the temperature of 30 ~ 100 ℃. The results show good linearity relationship between resistance and temperature. Compared the temperature of the standard by the thermal reflection temperature measurement system with the temperature of the standard was calculated by thermo-electric method .In this way, the temperature measurement accuracy of the thermal reflection temperature measurement system was verified, and ensure the accuracy of temperature measurement.

Research on Calculational Method of Limit Values for Flight Vehicles Centroidal Deviation

Zhang Yanling, Hong Bei , Liu Jiajia

2021, 41(2):  49-53.  doi:10.12060/j.issn.1000-7202.2021.02.09

Asbtract ( )   PDF (839KB) ( )  

Related Articles | Metrics

This article is concerned with the centroidal deviation of flight vehicle. First, calculation formulas of centroidal deviation are given through theoretical derivation. The following analysis reveals the deficiency of these formulas. Then, exhaustive method, Monte Carlo method and an optimization method are investigated to research centroidal deviation. After that, examples of typical flight vehicle’s centroidal deviation are presented utilizing the above methods. The findings of the present study show that Monte Carlo method is most effective for distribution characteristics of centroidal deviation, whereas exhaustive method and optimization method perform better on deviation limit value analysis.

Denoising of Rocket Engine Test Flow Data Based on Wavelet Analysis

YANG Yi, LI Da-yin, GUO Ya-nan, JIA Zhi-jie, WANG Yong-peng

2021, 41(2):  54-60.  doi:10.12060/j.issn.1000-7202.2021.02.10

Asbtract ( )   PDF (1328KB) ( )  

Related Articles | Metrics

In the test of a certain type of rocket engine,the data of liquid oxygen flow contains a large number of noise components, which seriously affects the evaluation of engine performance. Wavelet analysis is used to denoise the noisy signal.The characteristics of hard threshold and soft threshold denoising methods are analyzed.The signal-to-noise ratio(SNR)is used as the criterion to select Sym series and DB series wavelet basis functions, and Sym5 and DB9 wavelets are selected as the basis functions. The Sym5 and DB9 wavelet basis functions are combined with adaptive threshold selection unbiased likelihood estimation(Rigrsure)and heuristic threshold selection(Heursure) respectively to denoise the noisy data, and the signal-to-noise ratio and correlation coefficient are used as the evaluation indexes of denoising effect. The relative error between the denoised data and the theoretical data provided by the design department is calculated, and the results show that the denoising effect of the combination of Rigrsure and DB9 basis function is better. This method has important application and promotion value in the field of rocket engine test data denoising.

Research on the Technology System of Satellite Integrated Test for Batch Production

YANG Tong-zhi, DANG Jian-cheng, ZHONG Liang, XU Ben, LIU Yang

2021, 41(2):  61-67.  doi:10.12060/j.issn.1000-7202.2021.02.11

Asbtract ( )   PDF (8409KB) ( )  

Related Articles | Metrics

Under the high-density and high-intensity development situation of batch satellite, aiming at the problem that the traditional test is optimized in isolation and insufficient in system engineering, which leads to the limited improvement of the overall performance, the integrated test technology system of “digital test design, agile test system, pipelined test implementation, cloud-based test data and intelligent test evaluation” is proposed based-on system engineering for the whole test link of test design, test implement and test evaluation. The technical exploration of test system, test data and test evaluation is carried out, which has played a good role in satellite development. The mode of integrated test can be used as a reference for the development and application of domestic spacecraft integrated test technology.

Uncertainty Evaluation Method of Apogee Engine Thrust Vector

ZHENG Ke, ZHANG Wei

2021, 41(2):  68-73.  doi:10.12060/j.issn.1000-7202.2021.02.12

Asbtract ( )   PDF (2239KB) ( )  

Related Articles | Metrics

The thrust vector parameters of apogee engine are important reference of satellite assembly. The GUM method has been used to evaluate its uncertainty, but there is a problem of insufficient coverage for input combination. The mathematical model of dynamic axial thrust vector measurement is introduced, and the evaluation process of the GUM method is summarized in the paper. The principle, applicability and specific evaluation process of Monte Carlo method are described in detail, and the evaluation results are compared with those of the GUM method. The comparison results show that the Monte Carlo method is more suitable than the GUM method for the uncertainty evaluation of apogee engine thrust vector parameters, which can verify the available of the GUM method.

Analysis of Error Compensation Algorithm in Screw Thread Contact Scanning Measurement

Guo Yu, Wang Zhi-hua

2021, 41(2):  74-78.  doi:10.12060/j.issn.1000-7202.2021.02.13

Asbtract ( )   PDF (1330KB) ( )  

Related Articles | Metrics

Screw thread is the most common important part in the machining manufacturing industry, its quality directly affects the product quality. With the development of machining to special size, special structure and ultra precision, the quality and precision requirements of industrial products continue to improve, and higher requirements are put forward for thread measurement. In this paper, contact scanning measurement, which is widely used in the field of thread measurement, is analyzed, focusing on its complex algorithm and error correction. It has a positive significance for the application and improvement of thread measurement technology.

Management of Aerospace Measuring Instruments

REN Hui, LI Yu-hua, WU Chun-chan, MAI Ji, LI Wei

2021, 41(2):  79-82.  doi:10.12060/j.issn.1000-7202.2021.02.14

Asbtract ( )   PDF (661KB) ( )  

Related Articles | Metrics

Due to the particularity of aerospace products, the management of Metrology Technology and Measuring Instruments is different from the traditional methods. This article focuses on the important role of Measurement in the quality assurance of products. Analysis the current situation and shortcoming of the management of Measuring Instruments, and propose coping strategies.