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浏览/检索结果: 共11条，第1-10条 帮助

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Scientific preparation for JRT: Wind pressure prediction model for large radio telescope based on real data from multi-sensors 期刊论文  OAI收割
HELIYON, 2024, 卷号: 10, 期号: 18
作者:  Wu, Rui;  Cao, Zhong;  Wang, Feng;  Rao, Rui;  Huang YX(黄玉祥)
  |  收藏  |  浏览/下载：18/0  |  提交时间：2024/09/30
Analysis of Coaxiality Error Induced by the Cube Corner Retro-Reflector Geometrical and Assembly Errors of an Acquisition, Pointing, and Tracking System 期刊论文  OAI收割
PHOTONICS, 2023, 卷号: 10, 期号: 10
作者:  Li, Daquan;  Mao, Zhaoyong;  Sun, Lijuan;  Zhang, Haifeng;  Zhang, Furui
  |  收藏  |  浏览/下载：23/0  |  提交时间：2023/11/17
Analysis and correction of geometrical error-induced pointing errors of a space laser communication APT system 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF OPTOMECHATRONICS, 2021, 卷号: 15, 期号: 1
作者:  Zhang, Furui;  Ruan, Ping;  Han, Junfeng;  Li, Yao
  |  收藏  |  浏览/下载：37/0  |  提交时间：2021/05/28
Method and Implementation of Improving the Pointing Accuracy of an Optical Remote Sensor Using a Star Sensor 期刊论文  OAI收割
Traitement Du Signal, 2019, 卷号: 36, 期号: 4, 页码: 311-317
作者:  Q.Liu;  X.He;  F.W.Guan;  Y.C.Zhao;  F.Jiang
  |  收藏  |  浏览/下载：40/0  |  提交时间：2020/08/24
Experiments on the dish verification antenna china for the SKA 期刊论文  OAI收割
EXPERIMENTAL ASTRONOMY, 2016, 卷号: 42, 期号: 3, 页码: 301-317
作者:  Chai, Xiaoming;  Liu, Bin;  Yu, Lei;  Yu, Shenghua;  Wu, Di
  |  收藏  |  浏览/下载：22/0  |  提交时间：2019/04/08
Experiments on the dish verification antenna china for the SKA 期刊论文  OAI收割
EXPERIMENTAL ASTRONOMY, 2016, 卷号: 42, 期号: 3, 页码: 301-317
作者:  Chai, Xiaoming;  Liu, Bin;  Yu, Lei;  Yu, Shenghua;  Wu, Di
收藏  |  浏览/下载：29/0  |  提交时间：2017/03/01
Research on satellite platform vibration compensation method based on liquid crystal steering system (EI CONFERENCE) 会议论文  OAI收割
2011 SSITE International Conference on Future Material Research and Industry Application, FMRIA 2011, December 1, 2011 - December 2, 2011, Macau, China
作者:  Wen M.
收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25
Design and test of pointing mirror assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China
作者:  Chen W.
收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25
In order to ensure the surface figure of the pointing mirror (460mm long  290mm wide) in spaceborne remote sensing camera  Silicon Carbide was selected as the mirror material. The form of composite triangular and rectangular and the combination of open and closed back was explored in the lightweight design. A new kinematic mount and flexible structure in axis is used to hold the mirror around the lateral surface. The structure can minimize distortions induced by coefficient of thermal expansion mismatch among the materials. This eliminates the bending of the integral mount under the weight of the mirror. Optical performance of the mirror was analyzed under gravity load and temperature load using finite element method. Predicted surface figure error based on the removal of bias  tilt and power was calculated using an in-house Matlab script for mirrors. The pointing mirror assembly was tested using open loop servo control. And the surface figure was checked using interferometer. Surface figure accuracy is better than 1/30 ( 632.8nm  rms). The results show that the kinematic mount induces minimal figure error on the optical surface. 2011 IEEE.  
A 3-axis simulator for spacecraft attitude control research (EI CONFERENCE) 会议论文  OAI收割
2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China
作者:  Dai L.
收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25
This article presents the details of a new 3-axis simulator for spacecraft attitude control research and simulation. The air bearing allows the test bed to rotate about three axes with tiny friction. The attitude determination system consists of three fibre optical gyros  an inclinometer and a magnetometer. The actuator of the system consists of three reaction flywheels and four control moment gyros (CMG). Mathematical models of the sensors and actuators are given to help algorithm design. An extended Kalman filter was designed to provide attitude information for controller. Mathematical simulation results prove the attitude determination system can achieve high precision. A coulomb friction model of reaction wheels is given with experimental results. A friction compensation algorithm was developed to raise the pointing accuracy of the control system. The article also describes the details of the hardware structure. A PD stabilizing controller is implemented to test the validation of the whole control system at last. 2010 IEEE.  
Orientation error analysis of alt-alt photoelectric telescope (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  Wu X.-X.
收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25
In order to ascertain the effects of main errors of alt-alt photoelectric telescope on measurement accuracy  orientation error is analyzed.For analyzing optical  mechanical and electrical errors from measured target to telescope picture  we construct 7 coordinates such as:the earth's core coordinate  alt-alt coordinate  etc.  carry through 21 times coordinate transformation  form measuring equation with 26 variables. and we utilize Monte Carlo method to calculate the orientation error  analyze the effects of errors upon pointing. The result indicates that the measuring error standard deviation of alt-alt telescope is minimum value about 10? at the zenith zone. and the deviation increases with the rotation angles of longitude and latitude axes. The model and the method not only can analyze and synthesize the main errors  but also provide a reference to the whole design. 2009 SPIE.