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Leakage Current Analysis Using High Resistivity Silicon Gated Diodes For PIN Detectors Application
其他
2016-01-01
Hao Wang
;
Min Yu
;
Baohua Shi
;
Yahuan Huang
;
Xinyang Zhao
;
Yufeng Jin
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浏览/下载:3/0
  |  
提交时间:2017/12/03
thick
junction
leakage
gated
depletion
resistivity
evident
concluded
lifetime
specially
thick
junction
leakage
gated
depletion
resistivity
evident
concluded
lifetime
specially
The research of round raster readheads scheme (EI CONFERENCE)
会议论文
3rd international Conference on Manufacturing Science and Engineering, ICMSE 2012, March 27, 2012 - March 29, 2012, Xiamen, China
Cong J.-F.
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浏览/下载:26/0
  |  
提交时间:2013/03/25
The round raster is extensively applied in all kinds of high accuracy angular displacement measurement and control system. With the development of precise mechanotronics measuring instrument
machining center
CNC machine and various precise location testing technology
a higher request is put forward to the accuracy and the function of raster measurement system. In this article it is concluded that double readheads is the most reasonable configuration scheme through tests of single readhead scheme
two readheads and four readheads. (2012) Trans Tech Publications.
Analysis of zenith pass problem and tracking strategy design for roll-pitch seeker (EI CONFERENCE)
会议论文
Jiang H.
;
Jia H.
;
Wei Q.
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浏览/下载:17/0
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提交时间:2013/03/25
Roll-pitch seeker is currently applied in particular missiles. There is a stubborn problem called zenith pass problem while roll-pitch seeker is used. Analysis of the zenith pass problem which always results in loss of target is presented in this paper. Based on the analysis result
tracking strategy is carried out to deal with zenith pass problem. To prove the validity of tracking strategy
a practical roll-pitch seeker was accomplished. Model identification and common PID controllers for the physical roll-pitch seeker are taken on
after that
both disadvantages derived from zenith pass problem in tracking process and meliorated phenomenons by the tracking strategy are shown. It is concluded that the tracking strategy designed for solving the zenith pass problem is efficient. 2011 Elsevier Masson SAS. All rights reserved.
The effect of backlash nonlinear on resonance frequency of electric actuator transmission system (EI CONFERENCE)
会议论文
3rd IEEE International Conference on Advanced Computer Control, ICACC 2011, January 18, 2011 - January 20, 2011, Harbin, China
Han X.
;
Ge M.
;
Bai Y.
;
Jia H.
;
Ge W.
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浏览/下载:16/0
  |  
提交时间:2013/03/25
In order to study the effect of backlash nonlinear on resonance frequency of electric actuator transmission system
then
Finally
in the premise of meeting the stability
the dynamic equilibrium equation of transmission system with backlash is established
it makes dynamic simulation analysis for the transmission system based on virtual prototype technology
it establishes balanced equation of dynamics system with backlash
the effect of backlash on system natural frequency and resonance frequency
and the theoretical values and simulation values are compared. Theoretical analysis and simulation results show that the theoretical analysis is basically consistent with simulation results when it is zero backlash
and does some theory research and dynamic analysis of backlash nonlinearity and system natural frequency and resonance frequency. First
and the error of theoretical analysis and simulation results is within 10%. Therefore
according to describing function to theoretically model the backlash nonlinear
it can be concluded that considering the transmission system theoretical analysis of backlash nonlinearity is feasible
the relation between describing function and the amount of backlash and input amplitude is analyzed
and it is much closer to the actual system with instructive significance. 2011 IEEE.
The analysis of the large-diameter primary mirror deformation of surface figure in the temperature field (EI CONFERENCE)
会议论文
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Feng S.-L.
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浏览/下载:12/0
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提交时间:2013/03/25
The effect on the deformation of the primary mirror surface figure of the temperature gradient has been discussed theoretically. And its effect under axis and radial temperature gradient is analyzed when optical axis and support ways of the mirror changed. It has been concluded that the effect on the surface figure of the axis gradient is larger than radial gradient and also found that the deformation is concerned not only with thermal and structural parameter but also directly with the magnitude and direction of the temperature gradient. 2010 IEEE.
The application of TMS320c64x DSP assembly language in correlation tracking algorithms (EI CONFERENCE)
会议论文
2010 3rd International Congress on Image and Signal Processing, CISP 2010, October 16, 2010 - October 18, 2010, Yantai, China
Huang D.
;
Wu Z.
;
Liang M.
;
Dong Y.
;
Peng T.
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浏览/下载:16/0
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提交时间:2013/03/25
In order to improve the real-time performance of the conventional correlation tracking algorithm based on full search method
for its huge computation amount and vast correlation matching times in the process of searching an optimal matching position
a method of combining the TMS320C64x DSP assembly language and software pipelining is proposed to realize template matching which costs the most time of the algorithm. Choose high performance DSP chip TMS320DM642 as the core processor of the hardware platform
and schedule each one of the instruction in the algorithm to maximize performance using the instruction-level parallelism of the DSP. The experimental results indicate the time of template image matching implemented in assembly language has decreased from 49.36ms to 0.62ms. It is concluded that the correlation tracking adopting proposed method can meet the real-time and stability requirement of the target tracking. 2010 IEEE.
Configuring an electrostatic membrane reflector with potentials exerted on distributed electrodes (EI CONFERENCE)
会议论文
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
Shi G.
;
Zhong X.
;
Jin G.
;
Zhang P.
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浏览/下载:13/0
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提交时间:2013/03/25
Electrostatic membrane reflector (EMR) is very promised for optical quality application with the merits of utra-lightweight and flexible. Configuring a circular membrane reflector with electrostatic potentials exerted on distributed electrodes can approximatively produce a parabolic shape. A 300mm EMR (made from polyimide) stretched by distributed electrodes below is designed
and the number of concentric electrodes needed for membrane shape forming is analysed. First
based on an analytical solution of Poisson's equation
determine the membrane control matrix by finding influence functions of 3 concentric electrodes and 6 control points on membrane surface in order to compute the needed voltages exerted on the distributed electrodes by the method of least-squares fitting. Then the final shape solved by finite element analysis with ANSYS is contrasted with the paraboloid and deviates greatly when the central displacement of membrane is beyond 2.5mm
but in this range increasing the number of electrodes and control points will get a better shape. The corresponding errors are analyzed
and the control method is concluded. Only using the integrated method of analytical computation
numerical analysis and experiment
the membrane shape of certain central displacement can be exactly predicted and controlled. 2009 IEEE.
The analysis and design of low velocity estimation based on observer (EI CONFERENCE)
会议论文
2009 IEEE International Conference on Automation and Logistics, ICAL 2009, August 5, 2009 - August 7, 2009, Shenyang, China
Song Y.
;
Gao H.
;
Zhang S.
;
Tian Y.
;
Wang D.
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浏览/下载:28/0
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提交时间:2013/03/25
Low velocity servo system needs precision velocity estimation. An observer for low velocity estimation was proposed in this paper. First
the source of low velocity estimation errors and the shortcomings of the single period difference were analyzed. The relationship between the estimation accuracy and estimator's frequency characteristics was concluded. Then
the structure of the observer was proposed. Frequency characteristics were used to design the compensator which can stabilize the observer. The stability of the observer was also discussed. At last
the observer's estimation accuracy was evaluated through a quantitative comparison. The results of simulation and experiment have shown that the quantized error in velocity estimation decreases dramatically when a velocity observer is used. Compared with some commonly-used estimators
the phase lag accompanying the observer is much less. 2009 IEEE.
The deviation of color matching algorithm in the field of full-color LED display (EI CONFERENCE)
会议论文
2009 2nd International Congress on Image and Signal Processing, CISP'09, October 17, 2009 - October 19, 2009, Tianjin, China
Hao Y.-R.
;
Wang Y.
;
Zhang X.
;
Wang R.-G.
;
Chen Y.
;
Ding T.-F.
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浏览/下载:16/0
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提交时间:2013/03/25
In this paper
a color gamut transformation method which transformed the different color gamut into a same one has been proposed. In the transforming process
the deviation which was arose from the quantization error and the truncation error were existing. If the deviation was out of the color tolerance
the uniformity of the screen color will be deteriorated. Firstly
the color tolerance of vision was calculated by the color-difference formula. Secondly
in the full-color LED display experiments
it was analyzed that the tri -color tolerance values are respectively 2.5
2.8 and 1.3. According to the tri -color tolerance values and the color difference formula
the express of the quantization precision
gray value and the color difference was set up. Finally the gray-scale range of the color uniformity was analyzed by the collected data
it was concluded that the uniformity of the display was satisfied the requirement of the visual when the range of the gray level was [11
14]
and when the range was [1
11]
the value of the color difference was also reduced significantly. 2009 IEEE.
A method of outdoor simulation of infrared radiance of targets (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, June 17, 2009 - June 19, 2009, Beijing, China
Song J.-T.
;
Shen X.-H.
;
Zhao Y.-J.
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  |  
浏览/下载:23/0
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提交时间:2013/03/25
Current research on infrared simulation often focuses mainly on infrared imaging simulation by computer and pays little attention to outdoor simulation of infrared radiation characteristics of targets. In order to simulate infrared radiance of targets outdoors
in this paper we propose a new outdoor simulation method on the basis of heating the cloth by electricity. There are two major contributions in the paper. Firstly
uneven distributing of temperature field of the cloth surface is considered and the long-wave thermal imager is used as a link of the temperature control system. On the basis of many experiments
the expression is concluded about the relation of the temperature obtained by the lone-wave thermal imager and the temperature obtained by the temperature control system and the environmental temperature at the experimental scene. Secondly
the influence of the environment at the experimental scene on the infrared radiance of the cloth surface is thought over. Thanks to two measures above
simulation precision of infrared radiance is made much better. The results of many outdoor experiments demonstrate the performance of the proposed approach. 2009 SPIE.
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