×
验证码:
换一张
忘记密码?
记住我
CORC
首页
科研机构
检索
知识图谱
申请加入
托管服务
登录
注册
在结果中检索
科研机构
长春光学精密机械与物... [8]
内容类型
会议论文 [8]
发表日期
2010 [2]
2009 [2]
2008 [2]
2007 [1]
2006 [1]
×
知识图谱
CORC
开始提交
已提交作品
待认领作品
已认领作品
未提交全文
收藏管理
QQ客服
官方微博
反馈留言
浏览/检索结果:
共8条,第1-8条
帮助
限定条件
内容类型:会议论文
专题:长春光学精密机械与物理研究所
第一署名单位
第一作者单位
通讯作者单位
已选(
0
)
清除
条数/页:
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
排序方式:
请选择
发表日期升序
发表日期降序
提交时间升序
提交时间降序
题名升序
题名降序
作者升序
作者降序
Modular aircraft simulation platform based on simulink (EI CONFERENCE)
会议论文
2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China
Chen C.-Q.
;
Ji Y.
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2013/03/25
Aircraft simulation platform is the most important supporting technology in the aircraft development process. This simulation platform can be used for validating the design of subsystem and also it provides the necessary data for the Aircraft design. Wind has great impact on the flight parameter. In order to accurately simulate the wind model and calculate the flight parameters
a simulation modeling method for flight parameter simulation platform under wind field environment is established. Firstly
the various sub-systems which affecting flight parameters are analyzed
some mathematical models of the flight parameter simulation platform is established. Secondly
the atmospheric wind field is studied to analyze the impact on its trajectory. Then the model is built in the Simulink toolbox in the Matlab which is based on the principles of hierarchy and modularity
using C MEX S-function for the complex kinetic equations. Finally
when the models have been established
encapsulating models for several subsystem and assembling them for the Aircraft simulation platform based on the unified interface. The simulation tests (including the performance test of a certain gliding Aircraft
the wind influence test of a certain uncontrolled aircraft) prove the simulation capability of the platform
and its calculating step can reach 1 ms. Comparing simulation with field test data of a certain uncontrolled aircraft
it shows that the relative deviation of range is 0.47%
the relative deviation of maximal altitude is 2.1%. Taking relevant standards as a reference standard
it is demonstrated the platform is reliable
meets the engineering accuracy requirements. 2010 IEEE.
Application of adaptive UKF in initial alignment of MINS/GPS integrated navigation system (EI CONFERENCE)
会议论文
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
Jiao W.-B.
;
Gao Q.
;
Su W.-X.
;
Wang M.
收藏
  |  
浏览/下载:23/0
  |  
提交时间:2013/03/25
In order to overcome the shortcomings of standard unscented Kalman filter (UKF)
which are obviously influenced by the error of initial value and the model error of system
adaptive UKF which is based on the adaptive principle is applied in initial alignment of the MINS/GPS integrated navigation system. Coarse alignment cannot be done by micro inertial measurement unit (MIMU) itself because of its low precision
the method of using magnetometer to assist it with coarse alignment is presented. Simulation results show that the adaptive UKF can overcome the influences of initial values error and inaccurate system model
and improve the convergence speed and alignment accuracy effectively. 2010 IEEE.
System identification of tracking error and evaluation of tracking performance using BP neural network (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
Zhang N.
;
Shen X.-H.
收藏
  |  
浏览/下载:12/0
  |  
提交时间:2013/03/25
A novel approach for evaluating the tracking performance of optoelectronic theodolite is proposed. First
an equivalent mathematic model of tracking error is established. Then
the equivalent sine signal is inputted to the equivalent model
and the outputs are sampled. The results of evaluating the tracking performance are obtained based on the statistical calculation of output produced by equivalent model. Equivalent model using the BP (Backprogration) neural network structure is identified. The training method of BP neural network adopts the LM (Levenberg-Marquardt) algorithm for the sake of speeding up training process. The BP neural network is trained and tested by using the training and testing samples gotten from the simulation model of optoelectronic theodolite tracking system under MATLAB/SIMULINK. The estimate errors of equivalent model including average error
maximum error and standard error are 2.5872e-0060
2.8 and 1.9. The results show that the equivalent model identified based on BP neural network meets the needs of evaluating the tracking performance of optoelectronic theodolite. The accurate evaluation of tracking performance is achieved. 2009 SPIE.
Orientation error analysis of alt-alt photoelectric telescope (EI CONFERENCE)
会议论文
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 19, 2008 - November 21, 2008, Chengdu, China
Han X.-B.
;
Zhang J.-X.
;
Zhao J.-Y.
;
Zhao Y.-Z.
;
Wu X.-X.
;
Wang Z.-C.
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
In order to ascertain the effects of main errors of alt-alt photoelectric telescope on measurement accuracy
orientation error is analyzed.For analyzing optical
mechanical and electrical errors from measured target to telescope picture
we construct 7 coordinates such as:the earth's core coordinate
alt-alt coordinate
etc.
carry through 21 times coordinate transformation
form measuring equation with 26 variables. and we utilize Monte Carlo method to calculate the orientation error
analyze the effects of errors upon pointing. The result indicates that the measuring error standard deviation of alt-alt telescope is minimum value about 10? at the zenith zone. and the deviation increases with the rotation angles of longitude and latitude axes. The model and the method not only can analyze and synthesize the main errors
but also provide a reference to the whole design. 2009 SPIE.
Modeling diffractive optical elements in hybrid systems with the effect of the material dispersion (EI CONFERENCE)
会议论文
Current Developments in Lens Design and Optical Engineering IX, August 11, 2008 - August 12, 2008, San Diego, CA, United states
Zhang H.
;
Liu H.
;
Lu Z.
;
Zhang H.
;
Ni Z.
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2013/03/25
The diffractive optical element (DOE) is always modeled as an ideal pure diffractive element which neglects the refractive dispersion of the element's material. In this paper
a new model of the diffractive optical element is proposed
in which the effect of the refractive dispersion of the DOE's material is considered. The new model is explained and compared with standard diffraction-order expansion with the help of a hybrid system example. The analytical results show that the new model has an important meaning for the exact analysis of the hybrid refractive-diffractive optical system. 2008 Copyright SPIE - The International Society for Optical Engineering.
UV-VUV spectral irradiance responsivity calibration for space remote sensing spectroradiometer (EI CONFERENCE)
会议论文
Advanced Materials and Devices for Sensing and Imaging III, November 12, 2007 - November 14, 2007, Beijing, China
Yu H.
;
Shurong W.
;
Guanyu L.
;
Longqi W.
收藏
  |  
浏览/下载:13/0
  |  
提交时间:2013/03/25
In order to overcome the irradiance responsivity calibration troubles caused by the weak response of most spectral radiometers in ultraviolet band and poor ratio of signal to noise
and to meet special calibration condition for some remote sensing spectroradiometers in space
a spectral irradiance responsivity calibration unit based on parallel light illumination mode is established
it is composed of a 150W deuterium lamp and a spherical mirror. The calibration unit gets the output standard value of spectral irradiance by irradiance transfer
this way avoids the spectral reflectance measurement difficulty of the spherical mirror. A flight spectral radiometer model used for space remote sense was calibrated in range from 160nm to 300nm
the calibration error of spectral irradiance responsivity is 4.7%. Some factors which contribute to calibration uncertainties are discussed.
Real time tracking by LOPF algorithm with mixture model (EI CONFERENCE)
会议论文
MIPPR 2007: Automatic Target Recognition and Image Analysis; and Multispectral Image Acquisition, November 15, 2007 - November 17, 2007, Wuhan, China
Meng B.
;
Zhu M.
;
Han G.
;
Wu Z.
收藏
  |  
浏览/下载:21/0
  |  
提交时间:2013/03/25
A new particle filter-the Local Optimum Particle Filter (LOPF) algorithm is presented for tracking object accurately and steadily in visual sequences in real time which is a challenge task in computer vision field. In order to using the particles efficiently
we first use Sobel algorithm to extract the profile of the object. Then
we employ a new Local Optimum algorithm to auto-initialize some certain number of particles from these edge points as centre of the particles. The main advantage we do this in stead of selecting particles randomly in conventional particle filter is that we can pay more attentions on these more important optimum candidates and reduce the unnecessary calculation on those negligible ones
in addition we can overcome the conventional degeneracy phenomenon in a way and decrease the computational costs. Otherwise
the threshold is a key factor that affecting the results very much. So here we adapt an adaptive threshold choosing method to get the optimal Sobel result. The dissimilarities between the target model and the target candidates are expressed by a metric derived from the Bhattacharyya coefficient. Here
we use both the counter cue to select the particles and the color cur to describe the targets as the mixture target model. The effectiveness of our scheme is demonstrated by real visual tracking experiments. Results from simulations and experiments with real video data show the improved performance of the proposed algorithm when compared with that of the standard particle filter. The superior performance is evident when the target encountering the occlusion in real video where the standard particle filter usually fails.
The application study on building materials with computer color quantification system (EI CONFERENCE)
会议论文
ICO20: Illumination, Radiation, and Color Technologies, August 21, 2005 - August 26, 2005, Changchun, China
Li Z.
;
Yu H.
;
Li H.
;
Zhao H.
收藏
  |  
浏览/下载:18/0
  |  
提交时间:2013/03/25
The first impression of any building to a person is its exterior and decoration
therefore
at the same time
and therefore the quality of decoration project shows the more important position in building project. A lot of projects produce quality problem because of the material color difference
how to grasp and control the color change of building materials
the color difference problem laying stone materials is also studied in this paper
which exists universally at the common project
and carry out color quantification
and the solution scheme has been given using this system.
and is often found at the high-grade decoration
it has the very important meaning. According to the color theory
a computer vision system used in color quantification measurement is established
the standard illuminant A is selected as the light source. In order to realize the standardization of color evaluation
the mutual conversion between RGB and XYZ color space is studied
which is realized by the BP network. According to the colorimetry theory
the computer program is compiled in order to establish the software system
and realize the color quantitative appraisement in whole color gamut. LCH model is used at quantifying the color of building materials
and L*a*V model is used at comparing the color change. If the wooden floor is selected and laid improperly during family fitment
it is easy to present "flower face". The color also arises greater discrepancy using the laths of same tree. We can give the laying scheme using the color quantification system
©版权所有 ©2017 CSpace - Powered by
CSpace