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	Method for Estimating the Optimal Coefficient of L1C/B1C Signal Correlator Joint Receiving 期刊论文 OAI收割 REMOTE SENSING, 2022, 卷号: 14, 期号: 6, 页码: 21 作者: Guo, Yao; Zou, Decai; Wang, Xue; Rao, Yongnan; Shang, Peng \| 收藏 \| 浏览/下载：38/0 \| 提交时间：2022/08/15 GNSS MBOC correlator joint receiving B1C L1C high precision positioning combination coefficient
	Research on Precision Positioning Technology of High Dynamic Target Based on Motion Platform 会议论文 OAI收割 Chongqing, China, 2022-03-04 作者: Xie, Meilin; Cao, Yu; Lian, Xuezheng; Huang, Wei; Hao, Wei \| 收藏 \| 浏览/下载：141/0 \| 提交时间：2022/04/27 High Dynamic Precision Measurement Target Positioning Motion Platform
	Combined carrier phase and code phase passive radiation source localisation method 期刊论文 OAI收割 IET RADAR SONAR AND NAVIGATION, 2020, 卷号: 14, 期号: 1, 页码: 147-155 作者: Li, Youyang; Wang, Xue; Lu, Xiaochun \| 收藏 \| 浏览/下载：20/0 \| 提交时间：2020/11/09 Kalman filters position control direction-of-arrival estimation Global Positioning System nonlinear filters time-of-arrival estimation code phase passive radiation source localisation method high-precision positioning method arrival methods carrier phase-based positioning process position tracking times higher accuracy TDOA method positioning accuracy traditional positioning method combined carrier phase time 4 0 s to 10 0 s
	北斗PPP高精度时间比对技术研究期刊论文 OAI收割时间频率学报, 2020, 卷号: 43, 期号: 4, 页码: 262 作者: 张继海; 董绍武; 袁海波; 广伟; 宋会杰 \| 收藏 \| 浏览/下载：42/0 \| 提交时间：2021/11/29 BeiDou navigation satellite system high precision time transfer and comparison precision point positioning (PPP) coordinated universal time 北斗卫星导航系统高精度时间传递与比对精密单点定位协调世界时
	LABTM control system based on FPGA (EI CONFERENCE) 会议论文 OAI收割 2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan 作者: Wang Y.; Yu P.; Yu P.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：152/0 \| 提交时间：2013/03/25 This paper presents the digital PI control method for design and simulation of a high precision limited angle brushless torque motor control system in Field Programmable Gate Array device (FPGA). The direct drive structures which are widely applied in many servo control fields. Matlab Xilinx System GeneratorR toolbox based on Fixed-Point Arithmetic is used to design the digital PI controller using DSP architecture plot the responses of the control system and generate the VHDL source code. The control system model consists of a digital PI a real LABTM and a real absolute Inductosyn encoder to rpm and position blocks. Through loading generated codes in process of the simulation that built by the digital discrete model it is verified that the rising time of current loop is only 1.2ms and rate loop is 8ms overshoot is rarely 4.2%. Finally the comprehensive positioning accuracy of system can reach up to 5 arc sec and the rate jitter achieves 5% with the 4 arc sec accuracy absolute Inductosyn. (2013) Trans Tech Publications Switzerland.
	Design and experimental research of a new type focus mechanism used in space-based telescope (EI CONFERENCE) 会议论文 OAI收割 2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China 作者: Wang D. 收藏 \| 浏览/下载：34/0 \| 提交时间：2013/03/25 The position of focal plane will be changed because of temperature fluctuation and vacuum environment. In order to make the telescope work well positioning accuracy of the mechanism is 0.008mm. The performance satisfies the need of precision a focusing mechanism is needed. To majority of large space-based telescopes and the scheme design is reasonable and practicable. 2012 IEEE. the general way to do this would be to use a reflector which was located in the backfocal distance. One of typical schemes of this mechanism was introduced however because of the big axial size the mechanism can't be used when the size of the enclosure was limited. A new type of focusing mechanism was introduced which has such advantages of small size high accuracy and low mass. The design and test methods had been discussed. According to the results the repeatability positioning accuracy is 0.0025mm
	3R intersection target positioning in real time based on distance (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 Nengwei W.; Juan C.; Jian C. 收藏 \| 浏览/下载：13/0 \| 提交时间：2013/03/25 The positioning error based on angle angle-distance or single station positioning increases with the distance increasing. 3R target positioning based on distance can obtain the high precision measurements in long distance. Here we give the 3R model for the intersection positioning provide the two necessary conditions for getting the optimum intersection point. The experimental results show that the intersection precision based on angle is over 2m and will degrade greatly with the increasing of distance while the one based on 3R model will improve and the error decrease gradually. That the precision of the distance measurement is about 1m means the 3R model is better than the angle positioning which can compensate the drawbacks of the angle positioning at short distance. 2010 IEEE.
	A study of the jacking system for ferroalloy electric furnace electrode based on linear motor controlling (EI CONFERENCE) 会议论文 OAI收割 9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China Peng X.; Jiwei Z. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 The current jacking system for the hydraulic electric furnace electrode in Jilin Ferroalloy Factory is adopted the hand control in electrode jacking plan against this situation a structure which can adapt the linear stepping motor to control the digital valve for adjusting the location of the hydraulic system has been raised and the current system would realize automatic control to the electrode jacking by this way at the same time and by Fuzzy-PID control method the linear stepping motor would be controlled to obtain precise positioning in control. The hydraulic system controlled by digital valve have been described and analyzed in jacking feasibility and stability. What's more it is inspected and verified that the adjustment of this system has high precision and quick response. 2009 IEEE.
	Study on the fabrication of blazed grating with sub-micrometer space on aluminum film (EI CONFERENCE) 会议论文 OAI收割 12th International Manufacturing Conference in China, IMCC2006, September 21, 2006 - September 23, 2006, Xi'an, China Lun S.; Hao D.; Qi X. 收藏 \| 浏览/下载：14/0 \| 提交时间：2013/03/25 The saw tooth grooves of blazed grating ruled by ruling engine are formed by diamond tool which presses on the aluminum film evaporated on the substrate of optical glass or metal. The real shape of ruled saw tooth groove is different from that of the ideal groove and the ruling process indicates that there are the zero order planes similar to the flat tops on the grating grooves. The results of Fourier analysis for the real ruled grating featuring the zero order plane structure shows that the flat top width is an important factor for grating efficiency. Additionally bigger pressure value loaded on the diamond tool and bigger lateral pressure value on the aluminum film will be benefit to the improvement of grating diffraction efficiency. Based on the grating interferometer the high precision positioning control system of ruling engine guarantees the accuracy of the grooves space. High density blazed grating whose space is 0.83p.m is manufactured and its' grooves spaces are very equidistant and uniform under the view field of AFM. And the infrared blazed grating whose diffraction efficiency in the first order is up to 97 percent is ruled successfully also.