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浏览/检索结果: 共23条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 MOC: Wi-Fi FTM With Motion Observation Chain for Pervasive Indoor Positioning 期刊论文  OAI收割 IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS, 2024, 页码: 16 作者:  Shao, Wenhua;  Luo, Haiyong;  Zhao, Fang;  Hong, Yunhan;  Li, Yaqi   |  收藏  |  浏览/下载：8/0  |  提交时间：2024/12/06 Distance measurement  Accuracy  Position measurement  Wireless fidelity  Motion measurement  Protocols  Indoor environment  Factor graph  indoor localization  motion model  ranging model  time-of-flight   High-Accuracy Positioning Based on Pseudo-Ranges: Integrated Difference and Performance Analysis of the Loran System 期刊论文  OAI收割 SENSORS, 2020, 卷号: 20, 期号: 16, 页码: 15 作者:  Yan, Baorong;  Li, Yun;  Guo, Wei;  Hua, Yu   |  收藏  |  浏览/下载：16/0  |  提交时间：2020/11/04 Loran  position  geometrical dilution of precision  accuracy  difference method   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：21/0  |  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   A self-calibration method for mobile manipulator 会议论文  OAI收割 Shenyang, China, August 8-11, 2019 作者:  Zou HB(邹杭波);  Li, Yinghao;  Zhu SJ(朱思俊);  Gu KF(谷侃锋);  Zhang, Xinggang   |  收藏  |  浏览/下载：29/0  |  提交时间：2019/09/05 Mobile manipulator  Self-calibration  Absolute position accuracy   Automatic precise alignment of Sagnac interferometer 会议论文  OAI收割 Nanjing, PEOPLES R CHINA, 2017-10-24 作者:  Li Tian-yue;  Zhang Xue-min   |  收藏  |  浏览/下载：29/0  |  提交时间：2018/07/05 Spectrology  Precise Alignment  Sagnac Interferometer  Position Accuracy  Angle Accuracy   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：153/0  |  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.   The accuracy analysis of the intersection measurement on the moving ships 会议论文  OAI收割 sixth international symposium on precision mechanical measurements, guiyang, china, august 8, 2013 - august 12, 2013 作者:  Wang M(王苗) 收藏  |  浏览/下载：28/0  |  提交时间：2014/01/08 intersection measurement  mov ing ships  accuracy analysis  simulate and emulate  position measurement   Accuracy synthesis of a 3-RPS parallel robot based on manufacturing costs (EI CONFERENCE) 会议论文  OAI收割 31st Chinese Control Conference, CCC 2012, July 25, 2012 - July 27, 2012, Hefei, China Yao T.-K.; Xi Z.; Feng Z.; Zhang L.-M.; Yong W. 收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25 Pose accuracy is an important issue for parallel robot being used as mirror supporting system of telescope. One challenging topic is the accuracy synthesis which deals with the optimal design of the manufacturing and assembling tolerances of each component under the given pose accuracy. First  the error model of the 3-RPS parallel robot is built based on total derivation of the kinematic equations. And the error variable of each spherical or rotate joint can be expressed as a single boundary error parameter but not three independent position parameters. Then  the accuracy synthesis model is formulated taking the manufacturing costs as the optimization objective and the accuracy requirements as the constraint condition. Finally  the genetic algorithm is used to solve the optimization problem and a simulation example is given. The results show that the accuracy synthesis method based on manufacturing costs can satisfy the need of pose accuracy and is better for engineering application than the method based on error sensitivity. 2012 Chinese Assoc of Automati.   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：37/0  |  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   A small thickness measurement system based on PSD and FPGA (EI CONFERENCE) 会议论文  OAI收割 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China 作者:  Guo J.;  Guo J.;  He X. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 Considering that the requirement of industrial manufacture  An AT89S51 singlechip works as the core processor of the system. By two laser triangulation  a small thickness measurement system based on PSD and FPGA is presented. It takes S3931 PSD of one dimension as position detection device  A FPGA produces logic control signals for the whole system  the small displacement is converted to differential voltages  which is made by Hamamatsu in Japan  and after amplification and A/D transformation  8-bit parallel data is send to singlechip from FPGA by external interrupts  and the final calculation results output to the LCD display module. After digital micro meter calibration  we get the small thickness. Experiments show that the detection accuracy of the system is not less than 10um.