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Design of two-axis flexible support structure for fast steering mirror in space cameras 期刊论文
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering, 2019, 卷号: 48, 期号: 12
作者:  K.Wang;  H.Xin;  N.Cao;  Z.Shi
收藏  |  浏览/下载：2/0  |  提交时间：2020/08/24
LAN traffic flow prediction using improved small data method 期刊论文
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition), 2016, 卷号: 46, 期号: 4
作者:  Wang, S.;  Y.-X. Sui;  Y. Dong and H.-J. Yang
收藏  |  浏览/下载：19/0  |  提交时间：2017/09/11
激光聚焦小型三自由度并联机构分析及控制策略研究 学位论文
硕士: 中国科学院大学, 2015
作者:  王施相
收藏  |  浏览/下载：32/0  |  提交时间：2016/04/11
扁簧式起落架无人机着陆滑跑关键技术研究 学位论文
博士: 中国科学院大学, 2015
作者:  薛志鹏
收藏  |  浏览/下载：45/0  |  提交时间：2015/11/30
Kinematic analysis of a 3-DOF mini mechanism based on laser beam focusing by bracing the secondary mirror 期刊论文
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering, 2015, 卷号: 44, 期号: 12, 页码: 3627-3633
作者:  Wang, S.;  J. Guo;  X. Gan and T. Wang
收藏  |  浏览/下载：13/0  |  提交时间：2016/08/24
A 2-DOF Piezoelectric Inchworm Actuator for Precise Positioning 期刊论文
Advances in Mechanical Engineering, 2014, 卷号: 8
Hua S. M.; Liu G. S.; Lou Y. H.; Li Z. Q.; Meng Y. M.
收藏  |  浏览/下载：21/0  |  提交时间：2015/04/24
Application of precision harmonic gear drive in focusing mechanism of space camera (EI CONFERENCE) 会议论文
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China
Zhang X.; Yan C.
收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25
A kind of precision harmonic gear drive in the focusing mechanism of space camera is studied  which adopt external meshing complex wave transmission mode. Wave generator is combined with an elliptic cam and a flexible bearing around it. Flexspline is a structure of single wave with the same teeth. The output shaft is supported by a single cross-roller bearing. Ball screws connected the output shaft translate the rotational motion to the linear motion  and drive the focusing mirror repeated moving along the linear guide. The output rigid wheel is connected with absolute encoder to detect displacement of focusing movement. It has the characteristics of big transmission ratio  high precision  compact structure  high efficiency and smooth running etc. According to the practical application of this harmonic gear drive in the space camera  the location relationship between the displacement of focusing structure and the focal plane movement is derived  and the system error is analyzed  its accuracy is tested with the open-loop control method. Experimental results show that transmission ratio of the instrument is 1:70  repeated positional accuracy is 2m  which meet the requirements for use. 2010 SPIE.  
Automatic spin coater for concave spherical substrate (EI CONFERENCE) 会议论文
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, July 8, 2007 - July 12, 2007, Chengdu, China
Fengchao L.; Jingsong G.; Xiaoguo F.; Jingli Z.; Zhijun X.; Jun H.; Fenglin X.; Huiqing W.; Xiaohan L.
收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25
Coating photoresist film with uniform thickness on concave spherical substrate (CSS) is very important for microfabrication of concave spherical optical elements by lithography technique via a laser direct writer  for the uneven photoresist film will result in ununiformity of line width so as to influence the characters of optical elements. For improving the uniformity of photoresist film coating on CSS  an automatic spin coater was designed. The process and the mathematical model of spin coating for CSS were analyzed. Difficulties for realizing the spin coater consist of the control of multi-axis motion precisely and collaboratively  valves on/ff properly and real-timely. A flexible and well-behaved spinning motion system was achieved by tmeans of principal and subordinate CPUs control. The motion program for spin coating could be created and implemented automatically while the pressure and the valves were was watched and controlled in real time. Film coating and laser direct writing experiments on a CSS with aperture equals to 100 mm and radius equals to 370 mm were performed. Photoresist film with uniform thickness on CSS was obtained by selecting proper spin coating parameters such as rotational speed  acceleration and viscosity of the photoresist. After development  the section analysis by the atomic force microscope showed that photoresist film thickness was about 517 nm in the center and about 520 nm in the edge of substrate  the film thickness error was within 1%  and the line width was about 6.0 m with steep sides parallel each other. Experimental results indicate that uniform thickness of thin photoresist film has been coated on CSS by the spin coater  which contributes to quality improvement of laser direct writing lines on CSS.  

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