中国科学院机构知识库网格系统: 检索

Precise Real-Time Navigation of the LT-1A Satellite Based on New BDS-3 B1C/B2a Signals 期刊论文 OAI收割
IEEE SENSORS JOURNAL, 2024, 卷号: 24, 期号: 6, 页码: 8551-8562
作者: Zhang, Wanwei; Gong, Xuewen; Wang, Fuhong; Xie, Song; Chen, Junli

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收藏 | 浏览/下载：9/0 | 提交时间：2025/04/03

Broadcast ephemeris line-of-sight (LOS) error new B1C/B2a signals precise real-time navigation pseudoambiguity

Detection of Periodic Signals With Time-Varying Coefficients From CMONOC Stations in China by Singular Spectrum Analysis 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2023, 卷号: 61, 页码: 5802812
作者: Wu, Shuguang; Li, Zhao; Li, Houpu; Bian, Shaofeng; Ouyang, Hua

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收藏 | 浏览/下载：13/0 | 提交时间：2024/01/04

Crustal Movement Observation Network of China (CMONOC) stations periodic signals with time-varying coefficients (PSTC) root mean square error (RMSE) improve-ment rate singular spectrum analysis (SSA) method

Real-time kinematic positioning algorithm with GNSS and high-frequency accelerometer observations for broadband signals 期刊论文 OAI收割
MEASUREMENT SCIENCE AND TECHNOLOGY, 2020, 卷号: 31, 期号: 3, 页码: 9
作者: Tu, Rui; Liu, Jinhai; Zhang, Rui; Fan, Lihong; Zhang, Pengfei

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收藏 | 浏览/下载：23/0 | 提交时间：2020/11/11

real-time kinematic positioning broadband signals GNSS ambiguity resolution baseline error deformation monitoring

Parallel control and management system for biomimetic robotic fish based on ACP approach 会议论文 OAI收割
12th World Congress on Intelligent Control and Automation, WCICA 2016, Guilin, China, June 12, 2016 - June 15, 2016
作者: Liu, Jincun; Wu, Zhengxing; Yang, Xiang; Yu, Junzhi

收藏 | 浏览/下载：33/0 | 提交时间：2017/01/23

ACP-centered control method biomimetic robotic fish ACP approach management system parallel control system artificial systems functionally equivalent artificial robotic fish agent technology network-stored control strategies error feedback signals

A new method of waveform digitization based on time-interleaved A/D conversion 期刊论文 OAI收割
CHINESE PHYSICS C, 2013, 卷号: 37, 期号: 11
作者: Ye ChunFeng; Zhao Lei; Feng ChangQing; Liu ShuBin; An Qi

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收藏 | 浏览/下载：12/0 | 提交时间：2021/12/13

NONUNIFORMLY SAMPLED SIGNALS BAND-LIMITED SIGNALS RECONSTRUCTION JITTER DIGITIZERS READOUT waveform digitizer time-interleaved analog-to-digital conversion time-skew error digital correction algorithms

An appraisal method of dynamic interpolation error for high precision encoder (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
作者: Wan Q.-H.; Liu C.-X.; Liu C.-X.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

This paper introduces an appraisal method of the dynamic interpolation error for the high precision encoder (Lissajou pattern calculation method). When the encoder is rolling two groups of fine photoelectric signals whose phase difference are /2 can be collected using data collected car. The shape and position deviation can be obtained through the comparison between Lissajou charts and the standard circle. Then dynamic interpolation error can be calculated out directly. This method is immune to the influence of encoder's speed and has no rigid demand to the test circumstances and test devices. The experimental results indicate that this method is feasible and important to the encoder's dynamic interpolation error checking. 2011 IEEE.

Analyse the angular velocity estimation errors of -- filter based on high sampling rate (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Zhang Y.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

In order to get angular velocity of stabilization servo mechanism from angular position sensors -- filter based on high sampling rate was established model and error characteristics were analyzed. With the hypothesis of constant acceleration -- filter and its angular velocity transfer function were deduced. Combing with optimum parameters the effects of and sample rate on the error characteristics were evaluated. According to the requirements of stabilization servo mechanism the frequency characteristics of angular velocity transfer function are analyzed and the filter parameters are designed. The experimental which filter tracked and smoothed sinusoidal signal the results show that when the cutoff frequency of angular velocity loop is 44.9rad/s sampling period and parameters are 0.08ms and 0.01279 respectively the phase leading of angular position is 70. -- filter tracked sinusoidal signals with maximum angular velocity(30/s) and maximum angular acceleration(30/s2) the error of angular velocity estimation was 0.053/s. In the engineering of electro-optical stabilization servo mechanism -- filter can reduce noise effectively and reached the requirement of platform angular velocity estimation. Also it is one of the effective methods to get angular velocity from angular position sensors. 2011 IEEE.

Simulation and experiment of the static FTIR based on micro multi-step mirrors (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
作者: Liang Z.-Z.; Zhang J.; Zhang J.; Zhang J.; Zhu W.-B.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

In recent years Fourier transform spectrometer (FTS) with small size and low mass is required in many applications with growing need for real-time and small platform spectral detection. In this paper a micro Fourier transform infrared spectrometer (FTIR) based on spatial modulation mode was designed. This spectrometer has the advantages of high stability and simplified configuration. It also promises optical path differences (OPD) with high precision as MOEMS technology is used in manufacturing the key components. The simulation and the experiments with regard to this FTIR configuration have been done. Firstly the diffraction effect of the micro multi-step mirrors (MMSMs) is studied. We discuss the influence to the reversed spectrum by different mirror widths and different diffraction distances. Secondly we simulate and analyze the influence of the source solid angle to the spectral resolution. Thirdly we set up the theoretical model of the collimation error which is mainly from the defocus of the optical system and analyze the result caused by the collimation error. Fourthly a new discrete Fourier transform arithmetic using least-squares cosines progression (LSCP) is proposed which can reconstruct the spectrum with nonuniform sampled signals. Finally the MMSMs are fabricated used the MOEMS technology and the structural parameters are tested. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Optical transmission system based on 10GBASE-X (EI CONFERENCE) 会议论文 OAI收割
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
作者: Gao S.-J.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

In order to further enhance the bandwidth of the data communication system in theodolite The whole design of the PMD is realized by using Xenpak optical module. Its duty is responsible for converting 4-channel parallel 3.125Gbps data stream into a serial 10.3126Gbps data stream a single channel serial optical transmission system was designed based on the studying of the 10BASE-X Gigabit Ethernet physical layer technology which meets the IEEE standard. The conversion between the 64-bit 156.25MHz TTL signals and the 4 channel 3.125Gbps PCML differential signals is carried out by FPGA and sending out it in the form of light signals. The experimental results show that data transmission capacity was achieved a 10Gbps in the single-channel optical transmission system. It can conduct short distance transmission. The system delay is about 31lns. The bit error rates no more than 10-12 which satisfies the system demand. 2010 IEEE.

Optimal learning of bandlimited functions from localized sampling 期刊论文 OAI收割
JOURNAL OF COMPLEXITY, 2009, 卷号: 25, 期号: 2, 页码: 85-114
作者: Micchelli, Charles A.; Xu, Yuesheng; Zhang, Haizhang

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收藏 | 浏览/下载：19/0 | 提交时间：2018/07/30

Whittaker-Shannon series Bandlimited signals Optimal algorithms Error estimates Translation invariant kernels The bandwidth problem