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长春光学精密机械与... [14]
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会议论文 [14]
发表日期
2011 [14]
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发表日期:2011
专题:长春光学精密机械与物理研究所
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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.
收藏
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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.
Numerical simulation on efficient spinning technology based on multi-point adjusting principle (EI CONFERENCE)
会议论文
2nd International Conference on Manufacturing Science and Engineering, ICMSE 2011, April 9, 2011 - April 11, 2011, Guilin, China
Gong X. P.
收藏
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浏览/下载:18/0
  |  
提交时间:2013/03/25
In order to realize high efficiency and flexible manufacturing for rotary surfaces
equivalent stress in sheet metal's center region and bendable rollers active region exceeds yield stress
efficient spinning technology (EST) is researched. It is the combination of multi-point forming and traditional spinning. Principle of EST is described
and plastic deformation is generated
traditional spinning method is compared with it
experimental result accords with simulation result. Feasibility of EST is validated by simulation and experimental results. (2011) Trans Tech Publications.
and characteristics of it are analyzed. Finite element analysis (FEA) model of disc-shape part is established
EST process is analyzed
equivalent stress and plastic strain distributions are analyzed. EST equipment is developed
and the experiments are made. Results indicate: EST process consists of four stages
Design of motion adjusting system for space camera based on ultrasonic motor (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Xu K.
;
Jin G.
;
Gu S.
;
Yan Y.
;
Sun Z.
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浏览/下载:74/0
  |  
提交时间:2013/03/25
Drift angle is a transverse intersection angle of vector of image motion of the space camera. Adjusting the angle could reduce the influence on image quality. Ultrasonic motor (USM) is a new type of actuator using ultrasonic wave stimulated by piezoelectric ceramics. They have many advantages in comparison with conventional electromagnetic motors. In this paper
some improvement was designed for control system of drift adjusting mechanism. Based on ultrasonic motor T-60 was designed the drift adjusting system
which is composed of the drift adjusting mechanical frame
the ultrasonic motor
the driver of Ultrasonic Motor
the photoelectric encoder and the drift adjusting controller. The TMS320F28335 DSP was adopted as the calculation and control processor
photoelectric encoder was used as sensor of position closed loop system and the voltage driving circuit designed as generator of ultrasonic wave. It was built the mathematic model of drive circuit of the ultrasonic motor T-60 using matlab modules. In order to verify the validity of the drift adjusting system
was introduced the source of the disturbance
and made simulation analysis. It designed the control systems of motor drive for drift adjusting system with the improved PID control. The drift angle adjusting system has such advantages as the small space
simple configuration
high position control precision
fine repeatability
self locking property and low powers. It showed that the system could accomplish the mission of drift angle adjusting excellent. 2011 SPIE.
Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu S.
;
Yan Y.
;
Xu K.
;
Jin G.
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浏览/下载:40/0
  |  
提交时间:2013/03/25
With the development of aerospace remote sensing technology
the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures
the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera
the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera
the compensation method of image motion to space camera is researched. First
the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second
the system adopts 80C31 as controller of drift angle
and adopts stepping motor for actuators
and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced
and it achieve the closed-loop control of the drift angle position. At the last
this paper analyses the transmission precision of the mechanism. Through the experiment
we measured the actual precision of the image motion compensation mechanism
and compared with the theoretical analysis. There are two major contributions in this paper. First
the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism
it will bring adverse effects for the precision and stiffness of mechanism. For this problem
This paper designed a image motion compensation that have some advantages such as small size
light weight at the same time
high precision
stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second
the traditional mechanism control need to corrected
fitting and iterative for the control formula of mechanism. Only in this way
we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting
It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5
-4
-3
-2
-1
0
+1
+2
+3
+4
+4 as the expectation value of the imaginary drift angle
we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'
and it can achieve the high-precision image motion compensation. 2011 SPIE.
Geocentric distance's errors' correction of space cameras based on USGS DEM (EI CONFERENCE)
会议论文
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011, May 27, 2011 - May 29, 2011, Xi'an, China
Yan D.
;
Xu S.
;
Li W.
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浏览/下载:15/0
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提交时间:2013/03/25
In order to correct the geocentric distance's error of TDI (Time Delay and Integration) CCD space camera in calculation of image motion compensation
the data source of the earth's height above sea level USGS DEM (United States Geological Survey Digital Elevation Model) has been introduced to make digital elevation map
the match error of the forward direction (the integral direction of TDI CCD) has been greatly decreased by correcting the geocentric distance error
and eliminate the influence to the relative error of image motion velocity
and correct the error generated by the different heights above sea level. After correcting
which greatly improves the imaging quality of TDI CCD space camera. 2011 IEEE.
a model of image motion calculation of nadir has been introduced
the calculation and analysis of the model shows that: the maximum error of image motion velocity about 1.72% has been decreased to 0.06%
and the influence of the geocentric distance error to the relative error of image motion velocity has been analyzed with the model
The new approach for infrared target tracking based on the particle filter algorithm (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
Sun H.
;
Han H.-X.
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浏览/下载:50/0
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提交时间:2013/03/25
Target tracking on the complex background in the infrared image sequence is hot research field. It provides the important basis in some fields such as video monitoring
precision
and video compression human-computer interaction. As a typical algorithms in the target tracking framework based on filtering and data connection
the particle filter with non-parameter estimation characteristic have ability to deal with nonlinear and non-Gaussian problems so it were widely used. There are various forms of density in the particle filter algorithm to make it valid when target occlusion occurred or recover tracking back from failure in track procedure
but in order to capture the change of the state space
it need a certain amount of particles to ensure samples is enough
and this number will increase in accompany with dimension and increase exponentially
this led to the increased amount of calculation is presented. In this paper particle filter algorithm and the Mean shift will be combined. Aiming at deficiencies of the classic mean shift Tracking algorithm easily trapped into local minima and Unable to get global optimal under the complex background. From these two perspectives that "adaptive multiple information fusion" and "with particle filter framework combining"
we expand the classic Mean Shift tracking framework.Based on the previous perspective
we proposed an improved Mean Shift infrared target tracking algorithm based on multiple information fusion. In the analysis of the infrared characteristics of target basis
Algorithm firstly extracted target gray and edge character and Proposed to guide the above two characteristics by the moving of the target information thus we can get new sports guide grayscale characteristics and motion guide border feature. Then proposes a new adaptive fusion mechanism
used these two new information adaptive to integrate into the Mean Shift tracking framework. Finally we designed a kind of automatic target model updating strategy to further improve tracking performance. Experimental results show that this algorithm can compensate shortcoming of the particle filter has too much computation
and can effectively overcome the fault that mean shift is easy to fall into local extreme value instead of global maximum value.Last because of the gray and fusion target motion information
this approach also inhibit interference from the background
ultimately improve the stability and the real-time of the target track. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
Buffer and vibration optimization of missile data recorder structure (EI CONFERENCE)
会议论文
2011 International Conference on Mechatronics and Materials Processing, ICMMP 2011, November 18, 2011 - November 20, 2011, Guangzhou, China
Zhang J.
;
Jia H. G.
;
Ding L.
;
Dong W. H.
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  |  
浏览/下载:21/0
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提交时间:2013/03/25
On the analysis of the original data recorder
the stress wave theory is the elastic theory can explain the filter buffer question from the micro-small space
made several key problems clear when buffer and damping
from this designed a composite structure for vibration reduction
distinguished between a cushion theory and application field of stress wave theory
which made the dynamic stress of protected component down about one order of magnitude. Optimization with Isight and Ls-dyna
the traditional rigid spring-buffer model whose object is to reduce the impact of acceleration that can not accurately describe the elastic force of the part of the actual situation
the protected component's dynamic stress down about 69.3% and the data recorder's quality 300g lower
finally passed the Marshall Hammer test successfully. 2011 Trans Tech Publications.
Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
Zhang B.
;
Zhang Z.-D.
;
Zhang S.-M.
收藏
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浏览/下载:34/0
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提交时间:2013/03/25
Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications
on the other
which should be calculated
calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not
analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors
without considering the effect of the background radiation. By improving of the traditional method
including atmospheric attenuation
a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method
the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand
we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end
the dispersion of the image and the effect of image dispersion are not considered in the traditional method
an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
The lightweight design of the inner framework of the opto-electronic stabilization platform based on finite element analysis (EI CONFERENCE)
会议论文
2011 IEEE 18th International Conference on Industrial Engineering and Engineering Management, IE and EM 2011, September 3, 2011 - September 5, 2011, Changchun, China
Zou Q.
;
Ma H.-L.
;
Hu Y.
;
Ding J.-W.
收藏
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浏览/下载:22/0
  |  
提交时间:2013/03/25
The airborne opto-electronic stabilization platform should have the characteristics of high requirements for stability
tracking accuracy and lightweight. In order to verify the rationality of the main load-bearing structure
the inner-gimbal
finite element analysis was performed. Because of the poor working conditions of the airborne opto-electronic stabilization platform and the wide range of working temperature variation
-45 C 60 C
according to the actual working environment
air-resistance and temperature were added to the loads of the inner-gimbal in analysis. What's more
based on the analysis results
lightweight design was performed to the initial model and 64.37% of mass was decreased. The remarkable effect was obtained. This research is going to be instructive to design and production of the airborne opto-electronic stabilization platform in the future. 2011 IEEE.
The error analysis of automated biochemical analyzer (EI CONFERENCE)
会议论文
2011 International Conference on Computing, Information and Control, ICCIC 2011, September 17, 2011 - September 18, 2011, Wuhan, China
Qinghai C.
;
Yihui W.
;
Haiwen L.
;
Peng H.
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  |  
浏览/下载:18/0
  |  
提交时间:2013/03/25
In order to find out the relationships between the four error sources
namely
locating error
optics system fluctuations
sampling error and temperature fluctuations
and the accuracy of the instrument
we analyzed each relationship of them
and found that the effect of locating error is so tiny that it can be ignored
finally established the total error model and the model of the allowed noise of the optics system of the instrument. Analysis and the models may supply a reliable theory evidence for the improvement of the instrument and the designing of similar instruments. 2011 Springer-Verlag.
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