机构

• 长春光学精密机械与物... [2]
• 国家授时中心 [2]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• 期刊论文 [2]

发表日期

• 2020 [1]
• 2019 [1]
• 2013 [1]
• 2010 [1]

学科主题

筛选

浏览/检索结果: 共4条，第1-4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 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：45/0  |  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   Analysis of ocean tide loading displacements by GPS kinematic precise point positioning: a case study at the China coastal site SHAO 期刊论文  OAI收割 SURVEY REVIEW, 2019, 卷号: 51, 期号: 365, 页码: 172-182 作者:  Zhao, H.;  Zhang, Q.;  Tu, R.;  Liu, Z.   |  收藏  |  浏览/下载：24/0  |  提交时间：2021/11/29 Ocean tide loading  Global positioning system  Precision point positioning  Spectral analysis   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.   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.