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浏览/检索结果: 共18条，第1-10条 帮助

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Improving angular accuracy of a scanning mirror based on error modeling and correction 期刊论文  OAI收割
Sensors (Switzerland), 2019, 卷号: 19, 期号: 2
作者:  Fan, Yue;  Ma, Wenli;  Jiang, Ping;  Huang, Jinlong;  Chen, Kewei
  |  收藏  |  浏览/下载：18/0  |  提交时间：2021/05/06
Metrology and calibration of GSSMP rotation accuracy 期刊论文  OAI收割
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering, 2018, 卷号: 47, 期号: 9
作者:  An, Qichang;  Zhang, Jingxu;  Yang, Fei;  Zhao, Hongchao
  |  收藏  |  浏览/下载：15/0  |  提交时间：2019/09/17
Error-correct arithmetic for angular displacement measurement with single linear image detector 期刊论文  OAI收割
Optical Engineering, 2018, 卷号: 57, 期号: 5, 页码: 4
作者:  Yu, H.;  Wan, Q. H.;  Lu, X. R.;  Du, Y. C.;  Zhao, C. H.
  |  收藏  |  浏览/下载：23/0  |  提交时间：2019/09/17
Measurement error analysis of binocular stereo vision: effective guidelines for bionic eyes 期刊论文  OAI收割
IET SCIENCE MEASUREMENT & TECHNOLOGY, 2017, 卷号: 11, 期号: 7, 页码: 829-838
作者:  Wang, Qingbin;  Yin, Yingjie;  Zou, Wei;  Xu, De;  Yin YJ(尹英杰)
  |  收藏  |  浏览/下载：43/0  |  提交时间：2018/01/04
Noise analysis of grating-based x-ray differential phase-contrast imaging with angular signal radiography 期刊论文  iSwitch采集
Chinese physics b, 2017, 卷号: 26, 期号: 4, 页码: 6
作者:  Faiz, Wali;  Bao, Yuan;  Gao, Kun;  Wu, Zhao;  Wei, Chen-Xi
收藏  |  浏览/下载：54/0  |  提交时间：2019/04/23
Noise analysis of grating-based x-ray differential phase-contrast imaging with angular signal radiography 期刊论文  OAI收割
CHINESE PHYSICS B中国物理. B, 2017, 卷号: 26, 期号: 4, 页码: 40602
作者:  Faiz, W;  Zhu PP(朱佩平);  Tian, YC;  Zhu, PP;  Zan, GB
  |  收藏  |  浏览/下载：36/0  |  提交时间：2019/08/27
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.  
Three-sample rotation vector algorithm with angular rate input (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：22/0  |  提交时间：2013/03/25
In order to research the attitude algorithm with angular rate input under the conical motion  a optimal threesample rotation vector algorithm based on single-step Newton backward interpolation is proposed. Using the principle of limited rigid body rotation and the characteristic of angular rate input  three-sample rotation vector algorithm is derivated. To minimum attitude errors  three-sample rotation vector algorithm is optimized. Three angular rate extraction methods of singlestep entire sample recursion  multi-step entire sample and singlestep Newton backward interpolation are proposed. Under the condition of conical motion with semi-cone angle 3 and angular frequency 2rad/s  simulation is done. The simulation results show that single-step Newton backward interpolation is superior to the other two methods  and its maximum error peak is 0.01  error drift rate is 0.036/h. Experiments in three-axis flying turntable with the same parameters are carried out  and the results show that error drift rates of three-channels are less than those of traditional quaternion  which are 13.53%  12.08% and 23.68% lower respectively. It also verified that the new algorithm can perform a high accuracy under the conical motion. 2011 IEEE.  
Earth elevation map production and high resolution sensing camera imaging analysis (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:  Dai L.
收藏  |  浏览/下载：145/0  |  提交时间：2013/03/25
The Earth's digital elevation which impacts space camera imaging has prepared and imaging has analysed. Based on matching error that TDI CCD integral series request of the speed of image motion  statistical experimental methods-Monte Carlo method is used to calculate the distribution histogram of Earth's elevation in image motion compensated model which includes satellite attitude changes  orbital angular rate changes  latitude  longitude and the orbital inclination changes. And then  elevation information of the earth's surface from SRTM is read. Earth elevation map which produced for aerospace electronic cameras is compressed and spliced. It can get elevation data from flash according to the shooting point of latitude and longitude. If elevation data between two data  the ways of searching data uses linear interpolation. Linear interpolation can better meet the rugged mountains and hills changing requests. At last  the deviant framework and camera controller are used to test the character of deviant angle errors  TDI CCD camera simulation system with the material point corresponding to imaging point model is used to analyze the imaging's MTF and mutual correlation similarity measure  simulation system use adding cumulation which TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset to simulate camera imaging when stability of satellite attitude changes. This process is practicality. It can effectively control the camera memory space  and meet a very good precision TDI CCD camera in the request matches the speed of image motion and imaging. 2010 SPIE.  
Auto-detection system of photoelectric encoder based on DSP (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Industrial and Information Systems, IIS 2010, July 10, 2010 - July 11, 2010, Dalian, China
作者:  Wan Q.-H.;  Qi L.-L.;  Liang L.-H.;  Lu X.-R.;  Du Y.-C.
收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25
To improve the automatic detection efficiency of photoelectric encoder  an auto-detection system of photoelectric encoder is designed using DSP (TMS320F2812) as the core device. A 21-bit high accuracy photoelectric encoder is used as the angle standard. It is connected to the detected photoelectric encoder coaxially. They will rotate synchronously under the driving of electric motor. Data acquisition and processing system collects the angular data of the two photoelectric encoders at the same angular position and calculates the angular error of detected photoelectric encoder. Then the data is put into computer. The computer will display the data error. The result of experiment shows that the system could detect encoder whose bit-number below 19  the detecting person could be reduced to one and the detecting speed could be increased to 8-10 times. 2010 IEEE.