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长春光学精密机械与物... [6]
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会议论文 [6]
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2012 [1]
2011 [3]
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专题:长春光学精密机械与物理研究所
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Design of a miniature axial flux flywheel motor with PCB winding for nanosatellites (EI CONFERENCE)
会议论文
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
Wu J.
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浏览/下载:34/0
  |  
提交时间:2013/03/25
This paper presents the design and analysis of an axial flux permanent-magnet (AFPM) machine for nanosatellites application. It is a miniature axial flux surface mounted permanent magnet flywheel motor
using a printed circuit board (PCB) stator winding. The PCB stator has simplified the design and construction and avoids unnecessary space
since size reduction has become one of the most important aspects of flywheel motor design for nanosatellites. The performances of the machine are estimated by combination method of three-dimensional (3D) electromagnetic finite element analysis (FEA) and approximate theoretical analysis. The back EMF and electromagnetic torque are derived. A comparison between the analysis and experimental measurement results of the prototype machine is also presented. Both simulated and experimental results show that the proposed motor would be an acceptable solution for the nanosatellite applications with advantages such as simple structure and low-cost
as multi-layer circuit board production techniques have made the production of printed circuit coils cheaper and easier. 2012 IEEE.
An appraisal method of dynamic interpolation error for high precision encoder (EI CONFERENCE)
会议论文
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
Yi J.
;
An L.-M.
;
Liu C.-X.
;
Wan Q.-H.
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  |  
浏览/下载:11/0
  |  
提交时间:2013/03/25
This paper introduces an appraisal method of the dynamic interpolation error for the high precision encoder (Lissajou pattern calculation method). When the encoder is rolling
two groups of fine photoelectric signals whose phase difference are /2 can be collected using data collected car. The shape and position deviation can be obtained through the comparison between Lissajou charts and the standard circle. Then dynamic interpolation error can be calculated out directly. This method is immune to the influence of encoder's speed and has no rigid demand to the test circumstances and test devices. The experimental results indicate that this method is feasible and important to the encoder's dynamic interpolation error checking. 2011 IEEE.
The research of the accurate measure of static transfer function for the TDI CCD camera (EI CONFERENCE)
会议论文
3rd International Photonics and OptoElectronics Meetings, POEM 2010, November 2, 2010 - November 5, 2010, Wuhan, China
Guo-Ning L.
;
Long-Xu J.
;
Jian-Yue R.
;
Wen-Hua W.
;
Shuang-Li H.
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  |  
浏览/下载:18/0
  |  
提交时间:2013/03/25
In the test course of static transfer function of TDI CCD camera
because of the influence that gets environmental and artificial etc. factor
the value of static transfer function measured at any time is between unceasing fluctuation
so
make accuracy reduce. To solve this problem
a kind of accurate measurement technique of static transfer function is put forward. First
before carrying out the measure of static quiet of transfer function
the best test point of transfer function of the TDI CCD camera must be determined
it is parallel to guarantee the rectangle target surface of parallel optical pipe and camera focal plane maintenance parallel
and again guarantee target strip in rectangle target and TDI CCD in camera focal plane maintenance vertical. TDI CCD catches rectangle target image
per 1000 lines of target mark image as a measures sample of static transfer function
exclude because of atmosphere tremble twisted
vague rectangle target mark image
retain 500 distinct and steady target mark image as measure sample set. Then
calculate the static transfer function of each measure sample respectively
take the average of all static quiet transfer function in measure sample set as the static transfer function of camera. Finally
the measure of the static transfer function for TDI CCD camera makes error analysis. Experimental results indicate that the value of the static transfer function of TDI CCD camera measured with this kind of method is 0.2923
with before measurement technique comparison
the value of static transfer function has raised 0.02
makes the accuracy of the measure of static transfer function have gotten raising.
Roughness analysis of optical surfaces by X-ray scattering (EI CONFERENCE)
会议论文
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
Meng Y.
;
Chen B.
;
Chen C.
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浏览/下载:18/0
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提交时间:2013/03/25
A grazing incidence x-ray scattering (XRS) method
Order perturbation theory (FOPT)
is stated briefly and an experimental facility based on an improved X-ray diffraction has been introduced
which can work with high performance. The x-ray scattering distributions of two super smooth silicon samples measured at the incidence angle 0.2 degree
as the x-ray wavelength is 0.154 nm
have been given and analyzed by the FOPT to give information about the surface profiles. As a comparison
the root mean square (RMS) surface roughness
grey-scale maps and one-dimensional power spectral density (1D PSD) have been derived from the atomic-force microscope (AFM) data. The results evaluated by FOPT are in good agreement with that of AFM
which indicates that x-ray scattering method is a practical characterization for the investigation of super smooth surfaces. 2011 IEEE.
Experiments of second harmonic generation output in pulsed TEA CO 2 laser (EI CONFERENCE)
会议论文
High-Power Lasers and Applications V, October 18, 2010 - October 19, 2010, Beijing, China
Guo R.
;
Li D.
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浏览/下载:42/0
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提交时间:2013/03/25
It is always the hot subject to realize the output of high-power laser in the range of 3-5m wavelength. This rang of wave band has greatly important applications in military because it located in the atmosphere window. Generally there are two ways to obtain this range of laser wavelength. One way is through optical parameter oscillation (OPO) from shorter laser wavelength and the other is through second harmonic generation (SHG) from longer laser wavelength. Firstly
the comparison between tow nonlinear crystals ZnGeP2 and AgGaSe2 is conducted for their nonlinear coefficient and damaging threshold in theory. The theoretical results show that the crystal AgGaSe 2 is more suitable for the SHG of pulsed TEA CO2 laser. When using pulsed TEA CO2 laser with wavelength of 9.3m to pumping AgGaSe2 SHG crystal
the wavelength of 4.65m is obtained. In the condition of repetition rate 100Hz
the upmost output power of single pulse is up to level of 1W
which corresponding efficiency of SHG is about 6%. The experimental results show that the polarization of laser beam has greatly influence on the SHG output of the crystal. Under the radiation of 3MW/cm 2 from fundamental wave and the right position for maximal SHG output in the crystal
when polarization of laser beam rotates 4.5
the SHG output of energy decrease about 30%. The research of this paper will make a foundation for further development of mid-infrared laser. 2010 Copyright SPIE - The International Society for Optical Engineering.
Research on the close noise field of the piezoelectric pump (EI CONFERENCE)
会议论文
2006 IEEE International Conference on Mechatronics and Automation, ICMA 2006, June 25, 2006 - June 28, 2006, Luoyang, China
Jizhuang L.
;
Jianhui Z.
;
Shouyin W.
;
Qixiao X.
;
Desheng L.
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  |  
浏览/下载:42/0
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提交时间:2013/03/25
Restraining the noise
meanwhile
improving the dynamic characteristics of the driving power of piezoelectric pump effectively are the final purposes of doing research on the reciprocating and flexural vibration of the piezoelectric vibrator. However
among many papers regarding piezoelectric pump
there are very few papers about the research on the noise of piezoelectric pump. This is far less than the research on the application of the piezoelectric pump in other fields. In this paper
the research on the flexural vibration deformation and vibration radiation noise of the piezoelectric vibrator are carried out. Firstly
the vibration equations of the piezoelectric vibrator are built and flexural vibration deformation function is deduced. Then
the simplified vibration model of the piezoelectric vibrator is introduced by using vibration theories of micro-area piston. Furthermore
theoretical calculation equations of sound pressure in close noise field and noise contribution equation of fluid in pump are deduced. Finally
a comparison is made between the theoretical calculation value and experimental value
and the contribution quantities of the piezoelectric vibrator and fluid in pump are obtained respectively under different frequencies. The consequence approves that the theory introduced by this research is true. 2006 IEEE.
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