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浏览/检索结果: 共9条，第1-9条 帮助

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The research about servo control of 6-DOF workbench based on vacuum environment 期刊论文  OAI收割
Basic & Clinical Pharmacology & Toxicology, 2019, 卷号: 125, 页码: 20-20
作者:  H.Z.Yu;  Y.Y.Sun;  G.Wang;  W.J.Chang;  L.X.Zhao
  |  收藏  |  浏览/下载：21/0  |  提交时间：2020/08/24
Multi-phase carbonaceous coating with super wear resistance 期刊论文  OAI收割
VACUUM, 2018, 卷号: 157, 页码: 442-446
作者:  Wang, Yongxin;  Shang, Lunlin;  Zhang, Guangan;  Zeng, Zhixiang;  Wang, Liping
  |  收藏  |  浏览/下载：50/0  |  提交时间：2018/12/04
Multi-phase carbonaceous coating with super wear resistance 期刊论文  OAI收割
VACUUM, 2018, 卷号: 157, 页码: 442-446
作者:  Xue, Qunji;  Wang, Yongxin;  Shang, Lunlin
  |  收藏  |  浏览/下载：45/0  |  提交时间：2018/12/04
制备温度对聚酰亚胺薄膜真空摩擦学性能的影响 期刊论文  OAI收割
化工新型材料, 2017, 卷号: 45, 期号: 5, 页码: 103-105
作者:  刘百幸;  史晓辉;  尹建军;  彭振军;  梁军
  |  收藏  |  浏览/下载：25/0  |  提交时间：2018/01/02
润滑材料的空间环境效应 期刊论文  OAI收割
中国材料进展, 2017, 卷号: 36, 期号: 7-8, 页码: 481-491
作者:  高晓明;  胡明;  孙嘉奕;  翁立军
  |  收藏  |  浏览/下载：29/0  |  提交时间：2017/11/19
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：40/0  |  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  
Inspection focus technology of space tridimensional mapping camera based on astigmatic method (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
作者:  Wang Z.;  Wang Z.;  Zhang L.;  Zhang L.
收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25
The CCD plane of the space tridimensional mapping camera will be deviated from the focal plane(including the CCD plane deviated due to camera focal length changed)  under the condition of space environment and vibration  impact when satellite is launching  image resolution ratio will be descended because defocusing. For tridimensional mapping camera  principal point position and focal length variation of the camera affect positioning accuracy of ground target  conventional solution is under the condition of vacuum and focusing range  calibrate the position of CCD plane with code of photoelectric encoder  when the camera defocusing in orbit  the magnitude and direction of defocusing amount are obtained by photoelectric encoder  then the focusing mechanism driven by step motor to compensate defocusing amount of the CCD plane. For tridimensional mapping camera  under the condition of space environment and vibration  impact when satellite is launching  if the camera focal length changes  above focusing method has been meaningless. Thus  the measuring and focusing method was put forward based on astigmation  a quadrant detector was adopted to measure the astigmation caused by the deviation of the CCD plane  refer to calibrated relation between the CCD plane poison and the asrigmation  the deviation vector of the CCD plane can be obtained. This method includes all factors caused deviation of the CCD plane  experimental results show that the focusing resolution of mapping camera focusing mechanism based on astigmatic method can reach 0.25 m. 2010 Copyright SPIE - The International Society for Optical Engineering.  
Design and test of focusing mechanism of space camera (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, April 26, 2010 - April 29, 2010, Dalian, China
作者:  Li Y.;  Li Y.;  Li Y.;  Wang H.;  Wang H.
收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25
According to the focal depth and work environment of a space camera  a focusing mechanism is designed  which consists of precision screw ball transmission and linear bearing guidance and accuracy improving. The dynamic- strike- resistance  adaptability to temperature and vacuum are considered into the reliable design method. Furthermore  the linearity error  the structure stability and the mechanism work situation in high and low temperature are tested. The result is that the linearity error of the mechanism is less than 0.003 mm  and the sway error of vertical way and level way of the mirror is less than 20''. The linearity error of the mechanism and the sway error of the mirror remain unchanged after vibration test. The mechanism can work in the complex space environment. 2010 SPIE.  
A polysilazane coating protecting polyimide from atomic oxygen and vacuum ultraviolet radiation erosion 期刊论文  OAI收割
Surface & Coatings Technology, 2009, 卷号: 203, 期号: 22, 页码: 3338-3343
L. F. Hu; M. S. Li; C. H. Xu; Y. M. Luo; Y. C. Zhou
收藏  |  浏览/下载：29/0  |  提交时间：2012/04/13