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ASO-S: Advanced Space-based Solar Observatory 会议论文  OAI收割
Solar Physics and Space Weather Instrumentation VI, CA, 2015 - August 10
作者:  Gan, Weiqun;  Deng, Yuanyong;  Li, Hui;  Wu, Jian;  Zhang, Haiying
收藏  |  浏览/下载：44/0  |  提交时间：2016/07/18
Auto disturbance rejection control strategy for large inertia servo system 会议论文  OAI收割
4th International Conference on Frontiers of Manufacturing Science and Measuring Technology, ICFMM 2014, June 19, 2014 - June 20, 2014, Guilin, China
作者:  Zhang K.;  Zhang K.;  Zhang K.;  Zhang K.
收藏  |  浏览/下载：28/0  |  提交时间：2015/04/27
Realization of the FPGA based TDI Algorithm in Digital Domain for CMOS Cameras 会议论文  OAI收割
2012
Tao S. P.; Jin G.; Zhang X. Y.; Qu H. S.
收藏  |  浏览/下载：10/0  |  提交时间：2013/03/28
Design of astromesh deployable concentrator used in space concentrating photovoltaic system 会议论文  OAI收割
2012
作者:  Zhang P.;  Zhang Y.
收藏  |  浏览/下载：8/0  |  提交时间：2013/03/28
Design of high speed and parallel compression system used in the big area CCD of high frame frequency (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Precision Engineering and Non-Traditional Machining, PENTM 2011, December 9, 2011 - December 11, 2011, Xi'an, China
作者:  Li G.-N.;  Jin L.-X.;  Zhang R.-F.;  Wang W.-H.;  Li G.-N.
收藏  |  浏览/下载：47/0  |  提交时间：2013/03/25
According to the area CCD camera of characteristics  such as high resolution capacity and high frame frequency  this paper puts forward a high speed and parallel image compression system of high integration degree. Firstly  according to the work principle of the area CCD  FPGA is adopted to realize the timing driving and multichannel and parallel analog signal handling to raise the export frame frequency of the area CCD. Secondly  with an image compression scheme based on FPGA embedded processor MicroBlaze and ADV212 compression chip  real time image compression and the high speed area CCD are realized. Finally  by detecting the analog signal of the area CCD output  the real time compression of the big area CCD image is carried out in different compression ratios and the compression performance is analyzed. Experiment result shows that this scheme can realize real time image compression with the biggest data rate of 520Mbps. When compression bit ratio is 0.15  the signal-to-noise ratio of peak value can reach 36 dB. Image collection and image compression are integrated  which reduces the data transmission between them and improves systematic integration degree.  
Effect of the edge roughness of the pinhole in point diffraction interferometer on light diffraction 会议论文  OAI收割
2012
Lu Z. X.; Jin C. S.; Ma D. M.; Zhang H. T.
收藏  |  浏览/下载：5/0  |  提交时间：2013/03/28
Research on Identification of Moving Targets in Space 会议论文  OAI收割
2012
Xu T. Q.; Zhang G. X.; Xu W.; Jin G.
收藏  |  浏览/下载：5/0  |  提交时间：2013/03/28
Surface shape optimization for the space membrane reflector (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
作者:  Zhang Y.;  Zhang P.
收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25
Space membrane reflector is very promised for optical quality application with the merits of ultra-lightweight and flexible. In order to improve the surface precision of membrane reflectors  the formation and surface shape error of a membrane at uniform load are studied based on the henky-cambell equations of circular membrane. The ANSYS software is used to build an optimization model of membrane reflector surface shape  in which the yield strength is the state variable  the surface load on ten concentric annular regions of the mirror is the design variable  and the minimum RMS between ideal surface and mirror surface is the target function. and the theoretical and experimental result show that RMS and PV of the optimized surfaces are reduced respectively than those before optimization. In a word  this paper offers the theoretical and experimental basis of the polyimide membrane reflector. 2011 IEEE.  
Linear auto disturbance rejection controller for vector-controlled PMSM drive system (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Transportation, Mechanical, and Electrical Engineering, TMEE 2011, December 16, 2011 - December 18, 2011, Changchun, China
作者:  Zhang K.;  Zhang K.;  Zhang K.;  Zhang K.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
A high-performance robust controller of permanent-magnet synchronous motor (PMSM) drive with cascade linear auto disturbance rejection controller (LADRC) is proposed. The robust controller combines the simplicity of linear controller and the merit of the auto disturbance rejection controller (ADRC). First  a systematic mathematical model is derived according to the required specifications for the PMSM drive system. Then  for the model  this paper designs the controller that includes three first-order LADRCs. The controller does not rely on the accurate mathematical model of motor. The controller can estimate and compensate the disturbances that include load disturbance and systematic parameters changes by the linear extended state observer (LESO). Simulation results show that compared with conventional PI controller  the proposed approach has strong robustness. In the same load disturbance  the speed fluctuation of the LADRCs accounts for 30% of PI controller. 2011 IEEE.  
Energy transfer in Y3Al5O12:Ce 3, Pr3+ and CaMoO4:Sm3, Eu 3 phosphors (EI CONFERENCE) 会议论文  OAI收割
作者:  Wang L.;  Wang X.-J.;  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
Non-radiative energy transfers (ET) from Ce3 to Pr3+ in Y3Al5O12:Ce3  Pr3+ and from Sm3 to Eu3 in CaMoO4:Sm3  Eu3 are studied based on photoluminescence spectroscopy and fluorescence decay patterns. The result indicates an electric dipoledipole interaction that governs ET in the LED phosphors. For Ce3 concentration of 0.01 in YAG:Ce3  Pr3+  the rate constant and critical distance are evaluated to be 4.510-36 cm 6 s-1 and 0.81 nm  respectively. An increase in the red emission line of Pr3+ relative to the yellow emission band of Ce 3  on increasing Ce3 concentration is observed. This behavior is attributed to the increase of spectral overlap integrals between Ce3 emission and Pr3+ excitation due to the fact that the yellow band shifts to the red spectral side with increasing Ce3 concentration. In CaMoO4:Sm3  Eu3  Sm 3Eu3 transfer occurs from 4G5/2 of Sm3 to 5D0 of Eu3. The rate constant of 8.510-40 cm6 s-1 and the critical transfer distance of 0.89 nm are evaluated. 2010 Elsevier B.V. All rights reserved.