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长春光学精密机械与... [48]
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专题:长春光学精密机械与物理研究所
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Discrete-Time Direct Model Reference Adaptive Control Application in a High-Precision Inertially Stabilized Platform
期刊论文
Ieee Transactions on Industrial Electronics, 2019, 卷号: 66, 期号: 1, 页码: 358-367
作者:
D.Ke
;
S.Cong
;
D.J.Kong
;
H.H.Shen
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浏览/下载:1/0
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提交时间:2020/08/24
Adaptive control,inertially stabilized platform (ISP),model reference,adaptive control,nonlinear friction,turbulence isolation,systems
Quality assessment of images with multiple distortions based on phase congruency and gradient magnitude
期刊论文
Signal Processing-Image Communication, 2019, 卷号: 79, 页码: 54-62
作者:
X.K.Miao
;
H.R.Chu
;
H.Liu
;
Y.Yang
;
X.L.Li
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浏览/下载:1/0
  |  
提交时间:2020/08/24
No-reference,Image quality assessment,Phase congruency,Local binary,pattern,Image gradient,statistics,similarity,Engineering
The application of digital signal processing (DSP) for the real time solving of artillery fire control exterior trajectory (EI CONFERENCE)
会议论文
2012 IEEE 3rd International Conference on Software Engineering and Service Science, ICSESS 2012, June 22, 2012 - June 24, 2012, Beijing, China
Li D.
;
Guo L. H.
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浏览/下载:133/0
  |  
提交时间:2013/03/25
Method of gain firing data by calculate the group of differential equation has the advantages of high repeatability and high accuracy
But much of the CPU time is occupied by the task of re-iteration in computational processing. Therefore
it is not the real time processing. This paper introduces a method to quickly determine angle of firing by iteration method
which realizes Runge-Kutta method for the equations of exterior ballistic according to the model of mass center motion of projectile. Moreover
it also provides the flow of real-time integral solution and be proved by the simulation of MATLAB. Its accuracy satisfies the requirements. This work can be as reference for the design of opt-electrical fire control system and the demonstration work. 2012 IEEE.
Image quality assessment based on complex representation of structure information (EI CONFERENCE)
会议论文
2011 International Conference on Electrical, Information Engineering and Mechatronics, EIEM 2011, December 23, 2011 - December 25, 2011, Jiaozuo, Henan, China
Wang Y.
;
Zhao X.
;
Mo X.
;
Wang Y.
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  |  
浏览/下载:25/0
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提交时间:2013/03/25
Local variance and single pixel value are combined to describe image structure information using complex method in this paper in order to improve the consistency of objective image assessment result with that of subjective method. The effect of the detail structure information on the image quality was emphasized by this method accordingly. Singular value decomposition was performed on local variance distribution complex matrix. The angle between the singular value vectors of the reference image and the disturbed image was used to measure their structural similarity. Then the quality assessment process was achieved. Results from experiments show that the proposed method is better consistent with human visual system characteristics than MSE
PSNR
and SSIM. 2012 Springer-Verlag London Limited.
Improved method of target detection on optoelectronic hybrid joint transform correlator in cluttered scences (EI CONFERENCE)
会议论文
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
Qian Y.
;
Yang L.
;
Cheng X.
;
Hong X.
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  |  
浏览/下载:14/0
  |  
提交时间:2013/03/25
A classical joint transform correlator (JTC) usually yields large correlation sidelobes as well as a large correlation peak width
strong zero-order peak
and low diffraction efficiency
which make the detection ability of JTC lower. To overcome these difficulties
firstly
a joint power spectrum (JPS) subtraction technique in Fourier plane was proposed
where reference image power spectrum and object image power spectrum are subtracted from the JPS before inverse Fourier-transform operation
it is obvious that the modified JPS removes the zero-order term. Secondly
a fringe-adjusted filter (FAF) was presented to suppress sidelobes and noises. The modified JPS is multiplied by a FAF before the inverse Fourier-transform operation to obtain the cross-correlation peak. Computer simulations demonstrated the improved method can obviously remove zero-order diffraction and effectively suppress the sidelobes and noises compared with classic JTC
and then improve the detection ability for JTC. Experimental results presented the sharp correlation peak and also confirmed the method effectiveness. (2012) Trans Tech Publications
Switzerland.
Analysis on the influence of random vibration on MEMS gyro precision and error compensation (EI CONFERENCE)
会议论文
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
Hao X.
;
Li M.
;
Han X.
;
Jia H.
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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 its precision in dynamic environment
a Kalman filter was designed. Firstly
two sets of random drift data of MEMS gyro were respectively analysed
and it was found that the variance of random drift under random vibration significantly increased and its mean also changed. Then calculation results show that attitude angle error under random vibration is 2.6
while in the static test it is 0.25. Analysis on the characteristics of random drift was carried out
and it is found that it can be treated as stable
normally distributed random signal. Finally
a corresponding Kalman filter was designed. The results indicated that after filtering the variance of random drift is reduced to 0.0282
26.4% of pre-filtering and the attitude angle error is reduced to 1.5
57.7% of pre-filtering. The above method can effectively compensate for the attitude angle error of MEMS gyro caused by random vibration. This study can be a reference to the application of low-cost MEMS gyro in aircraft navigation. (2012) Trans Tech Publications
Switzerland.
Image registration based on Mexican-hat wavelets and pseudo-Zernike moments (EI CONFERENCE)
会议论文
2012 World Automation Congress, WAC 2012, June 24, 2012 - June 28, 2012, Puerto Vallarta, Mexico
Ding N.
;
Liu Y.
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浏览/下载:30/0
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提交时间:2013/03/25
Image registration is a key technique in pattern recognition and image processing
and it is widely used in many application areas such as computer vision
remote sensing
image fusion and object tracking. A method for image registration combining Mexican-hat wavelets and pseudo-Zernike moments is proposed. Firstly
feature points are extracted using scale-interaction Mexican-hat wavelets in the reference image and sensed image respectively. Then
pseudo-Zernike moments are used to match them and classical RANSAC used to eliminate the wrong matches. And then
the well match points are used to estimate the best affine transform parameters by least squares minimization. At last
the sensed image is transformed and resampled to accomplish the image registration. The experiments indicate that the proposed algorithm extracts feature points and matches them exactly and eliminates wrong matched points effectively and achieves nice registration results. 2012 TSI Press.
Study on the difference between turfy soil and normal peat soil in China (EI CONFERENCE)
会议论文
2011 International Conference on Vibration, Structural Engineering and Measurement, ICVSEM2011, October 21, 2011 - October 23, 2011, Shanghai, China
Yan L.
;
Nie L.
;
Xu K.
;
Su Z. D.
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浏览/下载:30/0
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提交时间:2013/03/25
As the special soil
turfy soil and peat soil in China contained some similar properties with high void ratio
high water content
high organic content
etc. But turfy soil also had properties which difference from peat soil. In this paper
based on the formation of the cause and geological environment and geomorphologic characteristics of geological in the quaternary
took the typical and widespread turfy soil and peat soil regions for example
systematically discussed the material composition and macroscopic and microcosmic structural features
put further research on the physical chemistry mechanical characteristics. Then the come to the conclusion that the essential reason for difference between turfy soil and peat soil were decomposition degree and organic content. The result that worse engineering properties such as higher the moisture content
porosity
compressibility
internal cohesion and the lower specific weight
consolidation coefficient and permeability were due to the lower decomposition degree and higher organic content of turfy soil than peat soil. It can provide reference to the practical projects of turfy soil to distinguish peat soil according to this characteristic. (2012) Trans Tech Publications.
Research of software re-injection technology for aerospace camera controller in-orbit (EI CONFERENCE)
会议论文
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
Xu W.
收藏
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浏览/下载:16/0
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提交时间:2013/03/25
For the factors of increased of tasks
enhancements of functions and improvement of integrity and complexity in aerospace camera
application system has raised high and long-term in-orbit autonomy and reliability requirements on camera controller. Based on an actual project application background
this paper has put forward a design method of new high reliability aerospace camera controller in-orbit software reinjection instruction sequence which use TSC695F as kernel CPU and process flow of bootstrap receive
cache
checkout and storage update data. Finally
combined with specific test module for camera controller software re-injection
the validity of the software re-injection method raised here has been verified. Still here gives out reference codes of update data package which generated by the ground. 2012 IEEE.
Image quality assessment based on gradient complex matrix (EI CONFERENCE)
会议论文
2012 International Conference on Systems and Informatics, ICSAI 2012, May 19, 2012 - May 20, 2012, Yantai, China
Wang Y.
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浏览/下载:18/0
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提交时间:2013/03/25
An image quality assessment model based on gradient complex matrix is proposed. The vertical and horizontal gradient information of grayscale image is calculated. Complex number is used to construct the measuring matrix. Singular value decomposition is performed in order to obtain the main structure information of the image. The singular value feature vectors of the image gradient complex matrices corresponding to the reference image and the distorted image are used to measure the structural similarity of the two images. PSNR is taken as a tool to evaluate the gradient distribution similarity. Their properties are analyzed by using LIVE database and nonlinearity regression function. 2012 IEEE.
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