Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679519
Yanjun Yan, Kai Chen, Bo Xu, Yifan Wang, Hong Yang, Houjun Wang
The temperature stability of the high-precision laser is conducive to the stability of the laser's electronic parameters, improves the output energy of the optical signal, and improves the measurement accuracy. In the past temperature control systems, many controllers have been proposed to ensure their accuracy performance, including positional control and classic PID control. But in the harsh application environment, the classic controller can not meet the requirements, so this paper proposes a new PID control method-parameter optimization fuzzy self-tuning PID (POFPID), based on the analysis of the instrument heating model, based on actual test data. System model fitting. Combining the fitting model and fuzzy theory improves the simulation for PID, and obtain the appropriate parameter range in advance. Therefore, the debugging time can be greatly saved in the actual debugging, and at the same time, due to the reasonable parameter range, the heating and cooling are prevented from being out of control, and the high-precision optical instrument can be well protected. The final result shows that the temperature control system designed in this paper can track and control the temperature of the instrument well. And because the function is first fitted and simulated, and then the actual debugging is carried out with the help of the obtained parameters, the debugging progress is greatly accelerated, and the loss of the high-precision instrument reaches a small level.
{"title":"A Design Method of Temperature Controller for High-Precision Laser","authors":"Yanjun Yan, Kai Chen, Bo Xu, Yifan Wang, Hong Yang, Houjun Wang","doi":"10.1109/ICEMI52946.2021.9679519","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679519","url":null,"abstract":"The temperature stability of the high-precision laser is conducive to the stability of the laser's electronic parameters, improves the output energy of the optical signal, and improves the measurement accuracy. In the past temperature control systems, many controllers have been proposed to ensure their accuracy performance, including positional control and classic PID control. But in the harsh application environment, the classic controller can not meet the requirements, so this paper proposes a new PID control method-parameter optimization fuzzy self-tuning PID (POFPID), based on the analysis of the instrument heating model, based on actual test data. System model fitting. Combining the fitting model and fuzzy theory improves the simulation for PID, and obtain the appropriate parameter range in advance. Therefore, the debugging time can be greatly saved in the actual debugging, and at the same time, due to the reasonable parameter range, the heating and cooling are prevented from being out of control, and the high-precision optical instrument can be well protected. The final result shows that the temperature control system designed in this paper can track and control the temperature of the instrument well. And because the function is first fitted and simulated, and then the actual debugging is carried out with the help of the obtained parameters, the debugging progress is greatly accelerated, and the loss of the high-precision instrument reaches a small level.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121143426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679636
Qi Chang, Lele Chen, Heng Zhao, Fangqin Xie
Aiming at the problem of inaccurate prediction of fatigue crack propagation due to uncertain factors, a method based on Dynamic Bayesian Network (DBN) is proposed in this paper. A crack propagation simulation model is established in the finite element analysis software ABAQUS. The Paris formula is combined with the finite element model(FEM) of the crack propagation to establish the state equation. And the crack propagation prediction model is constructed based on the uncertain parameters defined in the FEM. The strain sensors are adopted to monitor the crack propagation. The strain data and the crack length data are fitted into a function to construct a fatigue crack observation model, and the particle filter algorithm is used to revise the uncertain parameters and to predict the crack propagation. The experimental research shows that the model can be revised continuously through the DBN. The accuracy of prediction for the rest usage life(RUL) of the structure can be improved greatly. The credibility and validity of the method are also proved.
{"title":"Prediction of Crack Propagation Based on Dynamic Bayesian Network","authors":"Qi Chang, Lele Chen, Heng Zhao, Fangqin Xie","doi":"10.1109/ICEMI52946.2021.9679636","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679636","url":null,"abstract":"Aiming at the problem of inaccurate prediction of fatigue crack propagation due to uncertain factors, a method based on Dynamic Bayesian Network (DBN) is proposed in this paper. A crack propagation simulation model is established in the finite element analysis software ABAQUS. The Paris formula is combined with the finite element model(FEM) of the crack propagation to establish the state equation. And the crack propagation prediction model is constructed based on the uncertain parameters defined in the FEM. The strain sensors are adopted to monitor the crack propagation. The strain data and the crack length data are fitted into a function to construct a fatigue crack observation model, and the particle filter algorithm is used to revise the uncertain parameters and to predict the crack propagation. The experimental research shows that the model can be revised continuously through the DBN. The accuracy of prediction for the rest usage life(RUL) of the structure can be improved greatly. The credibility and validity of the method are also proved.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115265142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Text recognition is an important field of pattern recognition application. In this paper, a joint parameter recognition method based on convolutional neural network is proposed to solve the problems of small font, various cables, and traditional manual detection difficulty and low efficiency. Based on TensorFlow framework, this method builds a convolutional neural network model that can realize end-to-end recognition. First manually adjust the shade number serious cables, from different angles to adjust good cable collection into image preprocessing, and then use the contour detection and projection image segmentation algorithm on area of the wire number to find out and cut them into a single character, after normalization processing packaged into the sample set and test set in proportion to the convolutional neural network training, Finally, the obtained joint parameters are compared with the standard wiring information base, and the wrong or missed cables are screened out for manual adjustment. The convolutional neural network model is applied to power grid cable identification, and the results show that it can accurately locate and identify the routing parameters, effectively assist manual detection to identify the cable parameters, reduce the error rate of human eye detection, and greatly improve the efficiency of manual detection.
{"title":"Grid Row Parameter Identification Using Tensorflow Convolutional Neural Network","authors":"Yanming Huo, Linyu Li, Yuchuan Zhang, Qiushi Huang, Lucheng Zhang, Yu Wang, Zhaolei Wang","doi":"10.1109/ICEMI52946.2021.9679668","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679668","url":null,"abstract":"Text recognition is an important field of pattern recognition application. In this paper, a joint parameter recognition method based on convolutional neural network is proposed to solve the problems of small font, various cables, and traditional manual detection difficulty and low efficiency. Based on TensorFlow framework, this method builds a convolutional neural network model that can realize end-to-end recognition. First manually adjust the shade number serious cables, from different angles to adjust good cable collection into image preprocessing, and then use the contour detection and projection image segmentation algorithm on area of the wire number to find out and cut them into a single character, after normalization processing packaged into the sample set and test set in proportion to the convolutional neural network training, Finally, the obtained joint parameters are compared with the standard wiring information base, and the wrong or missed cables are screened out for manual adjustment. The convolutional neural network model is applied to power grid cable identification, and the results show that it can accurately locate and identify the routing parameters, effectively assist manual detection to identify the cable parameters, reduce the error rate of human eye detection, and greatly improve the efficiency of manual detection.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127813443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679558
Wei Li, Junning Cui, Limin Zou
Calibration of ultra-low frequency (ULF) vibration is of great significance and degree of difficulty, because the maximum amplitude of acceleration produced by electromagnetic standard vibration exciters is limited by stroke and decreases with vibration frequency by 12 dB/Oct. Therefore, the signal to noise ratio decreases correspondingly and harmonic distortion of ULF standard vibration becomes a challenging problem to be solved. A harmonic suppression method based on iterative learning is proposed in this paper. The system characteristics of ULF standard vibration exciters are studied, a PD-type iterative learning control method based on displacement feedback is introduced to eliminate disturbances by PD control and suppress repetitive disturbance moments by iterative learning, thus to effectively improve the signal-to-noise ratio and accuracy of ULF standard vibration waveforms. Simulation results show that this method can effectively reduce the tracking error of the system, and harmonic distortion of acceleration waveform is reduced from 1% to 0.03% after four times of iteration.
{"title":"Harmonic Suppression of Ultralow-frequency Standard Vibration based on Iterative Learning Control","authors":"Wei Li, Junning Cui, Limin Zou","doi":"10.1109/ICEMI52946.2021.9679558","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679558","url":null,"abstract":"Calibration of ultra-low frequency (ULF) vibration is of great significance and degree of difficulty, because the maximum amplitude of acceleration produced by electromagnetic standard vibration exciters is limited by stroke and decreases with vibration frequency by 12 dB/Oct. Therefore, the signal to noise ratio decreases correspondingly and harmonic distortion of ULF standard vibration becomes a challenging problem to be solved. A harmonic suppression method based on iterative learning is proposed in this paper. The system characteristics of ULF standard vibration exciters are studied, a PD-type iterative learning control method based on displacement feedback is introduced to eliminate disturbances by PD control and suppress repetitive disturbance moments by iterative learning, thus to effectively improve the signal-to-noise ratio and accuracy of ULF standard vibration waveforms. Simulation results show that this method can effectively reduce the tracking error of the system, and harmonic distortion of acceleration waveform is reduced from 1% to 0.03% after four times of iteration.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128142940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to improve the spatial coincidence measurement accuracy of position and size for the synthetic target image in current infrared target simulator, a calibration and measuring method of coincidence degree for infrared compound-eye imaging is proposed. Firstly, the mask assembly is employed to block the untested compound-eye subsystem, and the central field-of-view of the target simulator is used as the measuring benchmark. Then, the sub-imaging system is sampled and detected. Finally, the coordinate centroids of the feature points in each sub-image are counted to calibrate the imaging dispersion by the maximum relative error of the centroid pixel. The measured result shows that the image coincidence degree of the measured infrared target simulator can reach up to 80.8%. The factors affecting the spatial coincidence degree of synthetic target image in an infrared target simulator are also analyzed. The analysis results indicate that the coincidence degree of synthetic target image is mainly related to the following two factors: the geometric error of lithography target and the focal position consistency of compound-eye lens array, which is mainly influenced by the errors of vector height and radius of curvature for the compound eye lens array and the lens surface distortion.
{"title":"Study on the Calibration Method and Measurement of Coincidence Degree in an Infrared Compound-Eye Imaging System","authors":"Zhen Yang, Jianjun Zhang, Jianying Li, Xinmin Guo, Jianlong Zhang, Yong Zhang","doi":"10.1109/ICEMI52946.2021.9679662","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679662","url":null,"abstract":"In order to improve the spatial coincidence measurement accuracy of position and size for the synthetic target image in current infrared target simulator, a calibration and measuring method of coincidence degree for infrared compound-eye imaging is proposed. Firstly, the mask assembly is employed to block the untested compound-eye subsystem, and the central field-of-view of the target simulator is used as the measuring benchmark. Then, the sub-imaging system is sampled and detected. Finally, the coordinate centroids of the feature points in each sub-image are counted to calibrate the imaging dispersion by the maximum relative error of the centroid pixel. The measured result shows that the image coincidence degree of the measured infrared target simulator can reach up to 80.8%. The factors affecting the spatial coincidence degree of synthetic target image in an infrared target simulator are also analyzed. The analysis results indicate that the coincidence degree of synthetic target image is mainly related to the following two factors: the geometric error of lithography target and the focal position consistency of compound-eye lens array, which is mainly influenced by the errors of vector height and radius of curvature for the compound eye lens array and the lens surface distortion.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131874724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679622
Jun Yang, Changliang Tang, Liyong Wang, Xiaobo Liu, Bokang Su
As an important part of the dual-flow transmission device, the confluence planetary row works under the complex working conditions of high load, high frequency and strong impact, and the problem of vibration and noise is particularly prominent. In this paper, a concentrated parameter model of the confluence planetary gear dynamics is established, and the time-varying meshing stiffness, bearing stiffness, damping, shaft bending stiffness and other factors are comprehensively considered to establish a dynamic model suitable for the confluence planetary gear system under speed shock conditions. The dynamic characteristics of the confluence planetary gear under the speed shock load were numerically calculated, and the speed shock conditions were analyzed. The results show that as the speed increases, the vibration amplitude of each component shows an increasing trend; in the state of rotating speed shock excitation, the order spectrum signal is mainly composed of meshing frequency and high-order frequency doubling components, and the amplitude of each component also increases with the increase of speed. The test results are in good agreement with the numerical analysis. The conclusions obtained provide important theoretical support and engineering value for the vibration reduction, noise reduction and performance optimization of the confluence planetary gear system.
{"title":"Research on Dynamic Characteristics of Confluence Planetary Row under Speed Impact","authors":"Jun Yang, Changliang Tang, Liyong Wang, Xiaobo Liu, Bokang Su","doi":"10.1109/ICEMI52946.2021.9679622","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679622","url":null,"abstract":"As an important part of the dual-flow transmission device, the confluence planetary row works under the complex working conditions of high load, high frequency and strong impact, and the problem of vibration and noise is particularly prominent. In this paper, a concentrated parameter model of the confluence planetary gear dynamics is established, and the time-varying meshing stiffness, bearing stiffness, damping, shaft bending stiffness and other factors are comprehensively considered to establish a dynamic model suitable for the confluence planetary gear system under speed shock conditions. The dynamic characteristics of the confluence planetary gear under the speed shock load were numerically calculated, and the speed shock conditions were analyzed. The results show that as the speed increases, the vibration amplitude of each component shows an increasing trend; in the state of rotating speed shock excitation, the order spectrum signal is mainly composed of meshing frequency and high-order frequency doubling components, and the amplitude of each component also increases with the increase of speed. The test results are in good agreement with the numerical analysis. The conclusions obtained provide important theoretical support and engineering value for the vibration reduction, noise reduction and performance optimization of the confluence planetary gear system.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134195783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to improve the reliability of high-power power supply operation, it is of great significance to study the online monitoring technology of its internal IGBT module. In many current researches, IGBT status monitoring is difficult to implement online, affected by junction temperature, and monitoring circuit design is difficult. In this paper, $V_{CE(sat)}$ is selected as the online monitoring characteristic parameter, and an online monitoring method for IGBT module aging failure status based on measuring $V_{CE(sat)}$ under the condition of intersection collector current is proposed. This method does not need to consider the influence of junction temperature on the monitoring results. Based on this, an online monitoring program for the aging failure state of the three-phase high-power inverter power supply IGBT is proposed, and the $V_{CE(sat)}$ precision measurement hardware circuit and monitoring software of the program are designed. Finally, on the experimental platform, a comparative experiment and analysis were carried out on the IGBT module after accelerated aging and under normal operating conditions. The experimental results show that the scheme can effectively and accurately realize the online monitoring of the aging failure status of the IGBT module.
{"title":"Research and Implementation of Online Monitoring Technology for IGBT Key Devices of High-power Power Supply","authors":"Wenjian Zhou, Sheng Yang, Y. Deng, Yifan Wang, Xiaoyu Yang, Xuming Liang","doi":"10.1109/ICEMI52946.2021.9679637","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679637","url":null,"abstract":"In order to improve the reliability of high-power power supply operation, it is of great significance to study the online monitoring technology of its internal IGBT module. In many current researches, IGBT status monitoring is difficult to implement online, affected by junction temperature, and monitoring circuit design is difficult. In this paper, $V_{CE(sat)}$ is selected as the online monitoring characteristic parameter, and an online monitoring method for IGBT module aging failure status based on measuring $V_{CE(sat)}$ under the condition of intersection collector current is proposed. This method does not need to consider the influence of junction temperature on the monitoring results. Based on this, an online monitoring program for the aging failure state of the three-phase high-power inverter power supply IGBT is proposed, and the $V_{CE(sat)}$ precision measurement hardware circuit and monitoring software of the program are designed. Finally, on the experimental platform, a comparative experiment and analysis were carried out on the IGBT module after accelerated aging and under normal operating conditions. The experimental results show that the scheme can effectively and accurately realize the online monitoring of the aging failure status of the IGBT module.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130377073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679510
Yazhen Tong, Shangming Sang, Ming Yan, Xian Zhang, Xingxi Wen
High-value resistance generally refers to the DC resistor with a resistance value of more than 1M or 10M which is widely used in electrometer, microammeter, insulation tester and other instruments, among which its stability is the key factor to determine the performance of instruments. Therefore, it is necessary to measure the temperature and voltage characteristics of high value resistance. The traditional bridge method can only measure high value resistance at low voltage. The paper demonstrates a measurement method for high value resistance, which is realized by a set of measurement device composed of multi-functional standard source and electrometer. It can meet both low voltage and high voltage conditions. This method is compared with the bridge method to measure the same high value resistance. It is concluded that the measurement method proposed in this paper is closer to the actual situation of high value resistance. At the same time, the paper analyzed effects of insulating materials, external electromagnetic interference, bending or vibration of the measurement cable, pollutants in the test environment on high resistance measurement, and puts forward some preventive measures to improve the accuracy of measurement It is suitable for the measurement of high-value resistance in general laboratories, and has practical application value.
{"title":"Measurement and application of high-value resistance","authors":"Yazhen Tong, Shangming Sang, Ming Yan, Xian Zhang, Xingxi Wen","doi":"10.1109/ICEMI52946.2021.9679510","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679510","url":null,"abstract":"High-value resistance generally refers to the DC resistor with a resistance value of more than 1M or 10M which is widely used in electrometer, microammeter, insulation tester and other instruments, among which its stability is the key factor to determine the performance of instruments. Therefore, it is necessary to measure the temperature and voltage characteristics of high value resistance. The traditional bridge method can only measure high value resistance at low voltage. The paper demonstrates a measurement method for high value resistance, which is realized by a set of measurement device composed of multi-functional standard source and electrometer. It can meet both low voltage and high voltage conditions. This method is compared with the bridge method to measure the same high value resistance. It is concluded that the measurement method proposed in this paper is closer to the actual situation of high value resistance. At the same time, the paper analyzed effects of insulating materials, external electromagnetic interference, bending or vibration of the measurement cable, pollutants in the test environment on high resistance measurement, and puts forward some preventive measures to improve the accuracy of measurement It is suitable for the measurement of high-value resistance in general laboratories, and has practical application value.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114364203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679625
Xuwei Zhang, Zhilong Ye, Xunjiang Zheng, Shuodong Sun, Huiping Zhang
As a kind of high-precision attitude measurement instrument, star tracker will be widely used with the development of all-time technology. In order to expand the application scenario of star tracker, an autonomous navigation algorithm using all-time star tracker, time information, and accelerometer is proposed in this paper. Star tracker can measure the geometric relationship between carrier and inertial frame. Combined with accurate time and the measurement results of the accelerometer, the position and attitude of the carrier can be obtained through coordinate transformation. The error model of the navigation system is analyzed theoretically. The experimental results show that the accuracy of attitude measurement is about 10 ″, and the positioning accuracy is less than 10m while that of strapdown inertial navigation system is about dozens of meters.
{"title":"Autonomous Navigation Algorithm Using All-time Star Tracker, Accelerometer and Time","authors":"Xuwei Zhang, Zhilong Ye, Xunjiang Zheng, Shuodong Sun, Huiping Zhang","doi":"10.1109/ICEMI52946.2021.9679625","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679625","url":null,"abstract":"As a kind of high-precision attitude measurement instrument, star tracker will be widely used with the development of all-time technology. In order to expand the application scenario of star tracker, an autonomous navigation algorithm using all-time star tracker, time information, and accelerometer is proposed in this paper. Star tracker can measure the geometric relationship between carrier and inertial frame. Combined with accurate time and the measurement results of the accelerometer, the position and attitude of the carrier can be obtained through coordinate transformation. The error model of the navigation system is analyzed theoretically. The experimental results show that the accuracy of attitude measurement is about 10 ″, and the positioning accuracy is less than 10m while that of strapdown inertial navigation system is about dozens of meters.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114759146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679600
Qiao Zou, Rui Zhao, Jie Wu, Yahai Wang, Ziqi Jiang, Jinbang Wang
This paper designed a dielectric property test system of ultra wideband millimeter wave (UWB) materials by using quasi optical resonator method. By changing some structures, the dielectric property test of low loss materials in 12∼170GHz frequency band can be realized This paper breaks through the point frequency test method of low loss materials, and make it possible for broadband approximate frequency sweep test by using multi-point continuous test. Then test the common dielectric material quartz and automotive radar electronic materials at point frequency of 77GH. The test system has the characteristics of wide test frequency band, high precision and frequency sweep test.
{"title":"Broadband Millimeter Wave Dielectric Properties Measurement of Low Loss Materials","authors":"Qiao Zou, Rui Zhao, Jie Wu, Yahai Wang, Ziqi Jiang, Jinbang Wang","doi":"10.1109/ICEMI52946.2021.9679600","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679600","url":null,"abstract":"This paper designed a dielectric property test system of ultra wideband millimeter wave (UWB) materials by using quasi optical resonator method. By changing some structures, the dielectric property test of low loss materials in 12∼170GHz frequency band can be realized This paper breaks through the point frequency test method of low loss materials, and make it possible for broadband approximate frequency sweep test by using multi-point continuous test. Then test the common dielectric material quartz and automotive radar electronic materials at point frequency of 77GH. The test system has the characteristics of wide test frequency band, high precision and frequency sweep test.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117167687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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