中国科学院机构知识库网格
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STUDY ON THE DYNAMIC BEHAVIOR OFAXIALLY MOVING RECTANGULAR PLATES PARTIALLY SUBMERSED IN FLUID 期刊论文  OAI收割
ACTA MECHANICA SOLIDA SINICA, 2015, 卷号: 28, 期号: 6, 页码: 706-721
作者:  
Wang Yanqing;  Du Wei;  Huang Xiaobo;  Xue Senwen
  |  收藏  |  浏览/下载:19/0  |  提交时间:2021/02/02
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:35/0  |  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.  
Study on dynamic imaging on TDI CCD optical remote sensor of push-broom technology (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者:  
Liu L.;  Ren J.-Y.;  Liu L.;  Gao M.-H.
收藏  |  浏览/下载:22/0  |  提交时间:2013/03/25
A set special detecting system is proposed based on TDICCD push-broom technology applying in dynamic imaging detecting experiment of space optics remote sensor. In the system  In the course of detecting  push-broom movement of the satellite is simulated through using double supporting U structure precision rotary platform with remote sensor by angular speed 0.555/s  regard Nyquist frequency target as detecting aim  within the range of 5 and control precision on steady speed achieves 0.3%  in order to solve matching uncertainty between the CCD pixel and the vertical target strip image when the remote sensor does push-broom  make matching simplify  enhance the measurement result the accuracy. So the tolerance a/n arithmetic progression gap target strip is joined in each group of rectangular vertical group target strip. The remote sensor obtains in vertical  the level and 45 the direction 0 fields of view  0.86 the field of view Nyquist frequency target strip image after detected  a group target strip which can precision matching to TDICCD pixel at least can be obtained through analysis and dealing with 0.86 field of view's target strip image. The experiment not only verifies the detecting system's feasibility but simultaneously verifies whether to have the high quality dynamic imaging quality when TDICCD push-broom technology is adopted on the remote sensor developed. 2010 Copyright SPIE - The International Society for Optical Engineering.  
On the radiation and diffraction of water waves by a rectangular structure with a sidewall 期刊论文  OAI收割
ocean engineering, 2004, 卷号: 31, 期号: 17-18, 页码: 2087-2104
作者:  
Zheng, YH;  Shen, YM;  You, YG;  Wu, BJ;  Jie, DS
收藏  |  浏览/下载:11/0  |  提交时间:2016/10/27