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Chinese Academy of Sciences Institutional Repositories Grid
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Study on the servo system of large telescope based on the internal model pid control strategy (EI CONFERENCE) 会议论文  OAI收割
IEEE 2011 10th International Conference on Electronic Measurement and Instruments, ICEMI 2011, August 16, 2011 - August 18, 2011, Chengdu, China
Li H.
收藏  |  浏览/下载:21/0  |  提交时间:2013/03/25
Autocollimation form dual-frequency laser diffraction grating interferometer design and analysis (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Wang C.-G.
收藏  |  浏览/下载:34/0  |  提交时间:2013/03/25
Propose a new measurement system of autocollimation form laser grating heterodyne interferometer. Take grating diffraction and polarization optics as theoretical foundation  second  furthermore  combined with electronics knowledge to analyze the system. First  make use of autocollimation diffraction of grating  measurement information obtained by dual-frequency laser belongs to ac signal  the interferometer measurement system take grating pitch as measuring datum  the structure is simple  possess great gain and high signal-noise ratio  therefore  stable  completely overcome the disadvantages of DC level drift caused by light intensity variation of single-frequency laser  system can achieve nanometer resolution. 2010 IEEE.  reduce the impact of environmental factors  easy to install and debug  measurement error is small  
Qualitative determination of the components of textile products using near infrared spectroscopy (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photonics and Optoelectronics, SOPO 2010, June 19, 2010 - June 21, 2010, Chengdu, China
作者:  
Chen X.;  Chen X.;  Chen X.;  Wang D.
收藏  |  浏览/下载:29/0  |  提交时间:2013/03/25
In the paper  A total of 40 pure or two-mixed textile weaves were prepared and classification of these samples was introduced using near infrared spectroscopy (NIRS)  all textile samples are selected among four classes  which are Cotton-Terylene  Cotton-Polyurethane  Cotton and Terylene  according to theirs components. Near infrared diffuse reflectance spectra of the samples were collected  Mahalanobis distance was used to discriminate the samples coupled with principle components analysis (PCA)  the results showed that near infrared spectroscopy could determine which class one textile weave belongs to easily comparing with traditional methods. In addition  the expectation of the further research on qualitative determination of textile products by NIR technology was discussed in the end of this paper. 2010 IEEE.  
Implementation and stability analysis of the fuzzy controller based on electric-driven simulation turntable (EI CONFERENCE) 会议论文  OAI收割
ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China
Xie M.-J.; Wang L.-M.; Wang Z.-Q.
收藏  |  浏览/下载:22/0  |  提交时间:2013/03/25
Fuzzy controller was used to resolve the problem of fast tracking and overshoot in electric-driven simulation turntable  for its essence belongs to PD control In this system  the control rules of fuzzy controller were established according to the step dynamic response process  for the speed loop of this system was predigested to be second-orders system. The describing function method was adopted to analyze the stability of the fuzzy control system. It gave the information of stability of system intuitively. The fuzzy controller had been applied in this system successfully. The simulation turntable had no overshooting nearly when its step input signal was close to 90. Experimental results show the implementation method of fuzzy controller is not only simple but also effectual in engineering practice. It also provides an approach of design of fuzzy controller for motion control system. 2008 IEEE.  
Application research of intelligent algorithm in electric-driven flight simulation turntable (EI CONFERENCE) 会议论文  OAI收割
ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China
Xie M.-J.; Wang Z.-Q.; Wang L.-M.
收藏  |  浏览/下载:40/0  |  提交时间:2013/03/25
Application Research of Intelligent Algorithm in Electric-driven Flight Simulation Turntable is discussed in this paper. Fuzzy control is used to solve the problem of fast tracking and overshoot since its essence belongs to PD control In order to improve the performance of system in low speed  a method named variance-gain adaptive algorithm is introduced in this paper. It defines the amplifier gain as a function whose independent variable is speed  so the amplifier gain can automatically be adjusted with the change of speed. When the turntable runs at low speed  it has a big amplifier gain  a good rigidity and high tracking accuracy. When the turntable runs at high speed  the method can control the amplifier gain and ensure the system dynamic performance. Design and implementation of these algorithms is introduced in detail. Experiment results show that the Flight Simulation Turntable has achieved the required performance through using fuzzy control algorithm and variance-gain adaptive algorithm. 2008 IEEE.  
ELEMENTAL ABUNDANCES OF NINGQIANG CHONDRITE 期刊论文  OAI收割
Science Bulletin, 1986, 期号: 2, 页码: 111-114
作者:  
Chai ZF(柴之芳);  Mao XY(毛雪瑛);  Ma SL(马淑兰);  Wang SC(王思潮)
收藏  |  浏览/下载:20/0  |  提交时间:2015/12/07
COSMOGENIC RADIONUCLIDES OF NINGQIANG CHONDRITE FROM NONDESTRUCTIVE GAMMA-RAY SPECTROMETRY 期刊论文  OAI收割
Science Bulletin, 1986, 期号: 2, 页码: 115-117
作者:  
Chai ZF(柴之芳);  Su Q(苏琼);  Mao XY(毛雪瑛);  Ma SL(马淑兰);  Wang SC(王思潮)
收藏  |  浏览/下载:18/0  |  提交时间:2015/12/07
REE CHARACTERISTICS OF HONGTOUSHAN Cu-Zn MASSIVE SULPHIDE DEPOSIT IN QINGYUAN GRANITE-GREENSTONE TERRAIN; NE CHINA 期刊论文  OAI收割
Science Bulletin, 1985, 期号: 9, 页码: 1231-1235
作者:  
Zhai MG(翟明国);  Yang RY(杨瑞英);  Huang ZX(黄宗祥);  Zhou JW(周继微)
收藏  |  浏览/下载:21/0  |  提交时间:2015/12/25