Journals >Electronics Optics & Control
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2013
Volume: 20 Issue 6
22 Article(s)
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Research Article
Remarks on Standards of Integrated Module Avionic System
[in Chinese]
Integrated Module Avionics(IMA) is the development direction of the avionic systemand its technical standards have great significance on guiding the development of avionic systems onboard new types of military and civil aircrafts.Some concepts and technologies of it have been used in the avionic systems of RafaleF-22Integrated Module Avionics(IMA) is the development direction of the avionic systemand its technical standards have great significance on guiding the development of avionic systems onboard new types of military and civil aircrafts.Some concepts and technologies of it have been used in the avionic systems of RafaleF-22F-35A380 and B787.In this paperthe technical standards of Allied Standard Avionics Architecture Council (ASAAC) on system architecturesystem softwarecommunication/network, common functional module and packaging, and the relevant standard of ARINC are discussed..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 1 (2013)
Multi-Source Remote Sensing Image Fusion Method Based on Covariance Intersection Algorithm
CHONG Yuan, XU Xiaogang, XU Guanlei, and SHAO Chengyonga
Covariance intersection algorithm is a conservative distributed fusion estimation method obtained by optimizing certain objective functionwithout needing to compute the correlation among local estimation errorswhich provids a new idea for image fusion enhancement.Firstlythe 1D covariance intersection algorithm was iCovariance intersection algorithm is a conservative distributed fusion estimation method obtained by optimizing certain objective functionwithout needing to compute the correlation among local estimation errorswhich provids a new idea for image fusion enhancement.Firstlythe 1D covariance intersection algorithm was introduced;then this method was extended to 2D signal and image fusion for the first timeand an image fusion method based on covariance intersection was put forward.Finallythe fused image was compared with the existing fusion methodsand the results showed that fusion effect of it was superior to that of wavelet methodempirical mode decomposition methodand non-negative matrix factorization method..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 4 (2013)
Jamming Resource Management of Advanced Airborne Integrated Radio Frequency Systems
ZHAO Yu, WU Hua, CHENG Siyi, and SONG Haifang
To study resource management of integrated radio frequency system onboard advanced fighters for “single-to-multiple” jamminga systematic scheme of radar/jamming based on active phased array antenna was analyzedand a model for threat level evaluation was built up by means of multi-attribute decision-making.The jammingTo study resource management of integrated radio frequency system onboard advanced fighters for “single-to-multiple” jamminga systematic scheme of radar/jamming based on active phased array antenna was analyzedand a model for threat level evaluation was built up by means of multi-attribute decision-making.The jamming task requirement model was established based on the given threat thresholdand time division multiplexing mode was used for jamming multiple targets.An adaptive dynamic resource allocation method was proposed.Two criterions of jamming resource management were proposedthe minimum mean deviation of threat-level and the minimum deviation of highest threat-level.Combined with the algorithm of radar resource managementthe method can be used to realize the integrated management of radar and jamming resources as well.Computer simulation indicated that the adaptive method of resource management could optimize the dynamic allocation of jamming resources..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 7 (2013)
An Improved Three-Dimensional Variable Structure Guidance Law for Air-to-Air Missiles
GAO Xiaoxiang, ZHOU Deyun, and ZHOU Canhui
Aiming at problems existed in air-to-air missile attacking highly maneuvering target with variable structure guidance lawsuch as the divergence of line-of-sight angular rate and indetermination of variable structures parametersa new 3-dimensional guidance law was designed based on varying exponential reaching lawwhAiming at problems existed in air-to-air missile attacking highly maneuvering target with variable structure guidance lawsuch as the divergence of line-of-sight angular rate and indetermination of variable structures parametersa new 3-dimensional guidance law was designed based on varying exponential reaching lawwhich could adjust the variable structure parameters on line by using multi-input multi-output RBF neural network (RBFNN).The simulation results show that the new guidance law can effectively reduce the buffeting and improve the guidance accuracy.It has strong adaptive capability and robustnessand can meet the tactical requirements for air-to-air missiles..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 12 (2013)
Cooperative Task Assignment of Manned /Unmanned Aerial Vehicle Formation in Air Combat
LIU Hongqiang, WEI Xianzhi, FU Zhaowang, and ZHOU Zhongliang
Task assignment method plays a key role in manned /unmanned aerial vehicle formation cooperative air combat.Firstlya task decomposition method with constraint of timing sequential was presented.Thenthe task assignment model was established based on the improved Contract Net Protocol (CNP).The task assignment efficienTask assignment method plays a key role in manned /unmanned aerial vehicle formation cooperative air combat.Firstlya task decomposition method with constraint of timing sequential was presented.Thenthe task assignment model was established based on the improved Contract Net Protocol (CNP).The task assignment efficiency was enhanced by adopting the acquaintance model.The timing sequence task was processed by adopting the task validity parameter and blackboard mechanism.Finallysimulation was carried out based on the CNP task assignment modelthe result shows the well performance of the task assignment methodwhich can fulfill the requirement of cooperative air combat..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 16 (2013)
Radar Patrol Searching Area Equivalent Model of Antisubmarine Patrol Aircraft
LUO Musheng, HOU Xuelong, and WANG Peiyuan
To the patrol searching problem of antisubmarine patrol aircraft using radara radar searching probability model was presentedwhich considered the scanning width of radar searchingthe submarine exposure rate and detection avoidance rate.Based on thisthrough analyzing the patrol line station and relative movement of To the patrol searching problem of antisubmarine patrol aircraft using radara radar searching probability model was presentedwhich considered the scanning width of radar searchingthe submarine exposure rate and detection avoidance rate.Based on thisthrough analyzing the patrol line station and relative movement of antisubmarine patrol aircrafta general patrol searching detection probability model was built up by adopting area equivalent method.Finallythe influence of searching timelength and station position of patrol line on radar detection probability was analyzed by simulation.The results showed that:1) the area equivalent model can better solve the patrol searching probability calculation problem of antisubmarine patrol aircraftand 2) the radar detection probability increases with the searching timebut it tends to a special valueand the maximum detection probability is not high..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 20 (2013)
Application of Image in Long-Range Precision Strike of Naval Gun to Seacoast
DONG Yinwen, YUAN Bingcheng, WANG Hangyu, and SHI Zhaoming
Application of image in long-range precision strike of naval gun to seacoast fire support was discussedin which a new technical idea of using multi-source images from satelliteunmanned aerial vehicleTV-reconnaissance bomb and imaging terminal guidance shell for long-range precision strike to seacoast fire support waApplication of image in long-range precision strike of naval gun to seacoast fire support was discussedin which a new technical idea of using multi-source images from satelliteunmanned aerial vehicleTV-reconnaissance bomb and imaging terminal guidance shell for long-range precision strike to seacoast fire support was presented.Applications and development tendency of image in target strategic reconnaissancelocating and trackingdirected attack and damage assessment were analyzedand some key technical problems needing to be solved in image processing were pointed outwhich is useful for the development of large caliber naval gun weapon system..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 24 (2013)
Three Dimensional Trajectory Planning Under Multiple Constraints for UCAVs in Autonomous Attacking
LIU Heming, HUANG Changqiang, DONG Zhi, LI Youjun, and LAI Zhiping
The issue of unmanned combat air vehicles (UCAV) to attack ground targets with laser guidance missile was studied. Considering the multiple constraints and high real-time requirement in air-to-ground weapon delivery trajectory planningwe proposed a general framework of autonomous attack trajectory planning systemestaThe issue of unmanned combat air vehicles (UCAV) to attack ground targets with laser guidance missile was studied. Considering the multiple constraints and high real-time requirement in air-to-ground weapon delivery trajectory planningwe proposed a general framework of autonomous attack trajectory planning systemestablished the Acceptable Launching Area (LAR) model for the missileand proposed a strategy to generate 3D weapon delivery trajectories based on an improved A-star algorithm. This algorithm combined the optimal constraints and UCAV motion constraints to find the appropriate successor nodewhich can greatly decrease the complexity of the algorithm. We chose an appropriate step to eliminate height change within each stepwhich helped to separate horizontal plane and the vertical plane of the trajectoryand then revised the vertical trajectory height based on normal acceleration. Simulation results prove that this strategy can quickly generate a 3D weapon delivery trajectory which can lead the vehicle to the target LAR and satisfy the constraints for launching a missile..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 34 (2013)
A Method for Passive Locating of Airborne IRST Based on Laser Communication Link
CHEN Xin, WANG Haiyan, XU Qiang, WANG Fang, and TAI Qilong
In order to implement high-precision and rapid passive locating of airborne IRSTand considering the limit of ordinary inter-flight data link to large-capacity image transmissiona method for passive locating of airborne IRST was proposed based on laser link.The principle of locatingthe process of establishing airbornIn order to implement high-precision and rapid passive locating of airborne IRSTand considering the limit of ordinary inter-flight data link to large-capacity image transmissiona method for passive locating of airborne IRST was proposed based on laser link.The principle of locatingthe process of establishing airborne laser linkthe infrared image registration and fusionand the infrared target detecting and recognition were analyzed.Unscented Kalman Filter (UKF) was studied and was used to estimate the state parameters of the target taking the effect of observation equations nonlinearity and noise into consideration.The simulation result showed that the method can improve the evaluation accuracy of distance and velocityand can also improve the locating precision with increased airborne IRST sampling frequency..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 40 (2013)
Road Information Based Air/Ground Target Classification for Airborne Early Warning Radar
HAN Wei, TANG Ziyue, and ZHU Zhenbo
Air/ground target classification is a key step for ground target filtering in airborne early warning radarwhich can improve the quality of target track effectively.On the basis of exploiting target track information and ground road informationa method for air/ground target classification based on similarity of track Air/ground target classification is a key step for ground target filtering in airborne early warning radarwhich can improve the quality of target track effectively.On the basis of exploiting target track information and ground road informationa method for air/ground target classification based on similarity of track and road was proposed.Firsta fast arithmetic matching target filtering plot to a section of road was givenwhich could choose the roads used to classify air targets and ground targets subsequently.Thento the roads with windingaverage distance and correlation coefficient between target track and road were calculated out.Finallytarget classification was completed according to threshold decision and sliding window processing.The simulation results show that the method can implement air target and ground target classification accurately for different types of target track distribution..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 45 (2013)
Choosing Multiple Parameters for Function Regression Based on SVM
LIU Luoxia
Performance improvement of function regression based on Support Vector Mmachines (SVM) by automatically tuning multiple parameters of regressors was considered.This was done by minimizing some estimation of the generalization error of SVM using gradient descent and Genetic Algorithm (GA) over the set of parameters.PerfPerformance improvement of function regression based on Support Vector Mmachines (SVM) by automatically tuning multiple parameters of regressors was considered.This was done by minimizing some estimation of the generalization error of SVM using gradient descent and Genetic Algorithm (GA) over the set of parameters.Performance of the proposed method was illustrated by extensive experimental results..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 50 (2013)
A Controlled Angle Approach for Stable Scanning of Terminal-Sensitivity Projectile
ZHAI Baolei, LI Bo, and GAO Xiaoguang
An effective scanning method realized by controlling the scanning angle was proposed aiming at the drawbacks in stable scanning phase of Terminal-Sensitivity Projectile(TSP) as low efficiency and false alarm.Firstlya model was established for the scanning phase of TSPand analysis was made to the scanning trajectory aAn effective scanning method realized by controlling the scanning angle was proposed aiming at the drawbacks in stable scanning phase of Terminal-Sensitivity Projectile(TSP) as low efficiency and false alarm.Firstlya model was established for the scanning phase of TSPand analysis was made to the scanning trajectory as well as the disadvantages of traditional scanning method.Subsequentlya search algorithm with a controlled angle was proposed and its principle was then detailed.Finallysimulation demonstrated that the proposed approach can significantly improve the combat effectiveness of the TSP..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 58 (2013)
Design and Implementation of Small Integrated Cockpit Display System Software
ZHANG Shuang, RU Wei, and ZHANG Lei
Based on the application requirements of small airplane avionic systemwe designed a logical framework of the systemand put forward the top-level Functional Flow Block Diagram (FFBD) of flight display and integrated processed computer by analyzing the framework of small integrated cockpit avionic system.Three criticalBased on the application requirements of small airplane avionic systemwe designed a logical framework of the systemand put forward the top-level Functional Flow Block Diagram (FFBD) of flight display and integrated processed computer by analyzing the framework of small integrated cockpit avionic system.Three critical technologies were proposedincluding real-time multi-channel data acquisitionredundancy path realization and data loading.Then the specific realization method was given.This system was implemented on VxWorks embedded real-time operating systemand has been applied in an integrated avionics project for a certain type of aircraft..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 62 (2013)
Analysis of Inverse Path Tracing Rays of Narcissus for Cooled Infrared Optical System
ZHANG Peng, LUO Changjiang, and XIONG Zhongxiu
The narcissus is an important parameter for evaluating the imaging quality of the cooled infrared optical system.The cause of narcissus for infrared optical system was analyzed.The method for controlling and analyzing narcissus in optical design software was discussed.A method of inverse path tracing rays was proposed The narcissus is an important parameter for evaluating the imaging quality of the cooled infrared optical system.The cause of narcissus for infrared optical system was analyzed.The method for controlling and analyzing narcissus in optical design software was discussed.A method of inverse path tracing rays was proposed for analyzing the magnitude of narcissus of each surface in the optical system.A cooled optical system working in the LWIR was designedwhich focal length is 120 mm.The method of inverse path tracing rays was used to analyze the magnitude of narcissus of each surface of the optical systemwhich was in accordance with the YNI and I/Ibar parameters given by the optical design softwareand the results calculated by the empirical formula.And the method of inverse path tracing rays for calculating narcissus is more direct..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 66 (2013)
Abnormal Data Eliminating and Repairing Method Based on Two-Sided Test
JIANG Dazhi, and HAN Xianping
In view of the complex test environment and characteristics of measurement datathrough a deep analysis of the causes of abnormal dataa method for eliminating abnormal data based on two-sided test of measurement result data by use of polynomial fitting was presented.When the test result met the repairing conditionweiIn view of the complex test environment and characteristics of measurement datathrough a deep analysis of the causes of abnormal dataa method for eliminating abnormal data based on two-sided test of measurement result data by use of polynomial fitting was presented.When the test result met the repairing conditionweighted repairing was conducted for the eliminated data.Real data test showed that this method can effectively overcome the influence of data mutation and paragraph stephas better model stability and higher abnormal data eliminating ratewhich can meet the actual requirement of experimental task and is of high practical value in engineering..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 70 (2013)
FPGA Based Real-Time Geometric Distortion Correction for Video Images
ZHENG Yongrui, LI Jie, LIU Xiaohong, and LIN Qiuhua
The images generated by large-FOV optical equipment usually have geometric distortion.It is difficult to implement real-time correction of the geometric distortion for images with high resolution and serious distortion on hardware platforms.After analyzing the problems of the existing serial and parallel algorithmswe The images generated by large-FOV optical equipment usually have geometric distortion.It is difficult to implement real-time correction of the geometric distortion for images with high resolution and serious distortion on hardware platforms.After analyzing the problems of the existing serial and parallel algorithmswe proposed a structure of buffer in which both odd and even pixels in the odd and even lines of the images were buffered separately.Bilinear interpolation algorithm was used together with the proposed structure for implement geometric correction and gray grade correction of the images.The experiments results showed that the proposed structure may realize gray interpolation algorithm easily with less resourcesand implement real-time distortion correction with a shorter delay..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 75 (2013)
ISAR Phase Focusing for Nonuniform Rotating Target Based on Adaptive Chirplet Decomposition
CAI Hong, HE Qiang, and ZHAO Chunyu
In ISAR imagingthe phase error caused by nonuniform rotation is relevant to the radial position of scatterersso it is difficult for us to use traditional phase focusing algorithms to complete the phase compensationin which the uniform phase correction function is applied.In order to solve the problemwe put forward In ISAR imagingthe phase error caused by nonuniform rotation is relevant to the radial position of scatterersso it is difficult for us to use traditional phase focusing algorithms to complete the phase compensationin which the uniform phase correction function is applied.In order to solve the problemwe put forward a phase compensation method based on adaptive Gaussian Chirplet decomposition (AGCD) fast algorithm.In this methodthe linear frequency modulation (LFM) signal parameters of two stronger scatterers in random range bin are obtained via AGCD algorithmand then the multiple prominent point processing (PPP) model is implemented to eliminate the phase error caused by translational motion and nonuniform rotation.This method has the advantages of low computation cost and high accuracyand it doesnt require the scatterer be well isolated.The numerical simulation proves its good efficiency..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 79 (2013)
The Limit and Improvement of Communication Distance in IEEE 802.11 Protocol
ZHANG Feng, XIANG Xin, YANG Baoqiang, LIU Xiong, and WU Xuxu
The maximum communication distance of main CSMA/CA protocol in present 802.11 communication protocol is only 300 m;and the system performance declines dramatically with the increase of distance over 300 m.The cause for this problem was analyzedand a method of changing ACKtimeout in accordance with the variation of disThe maximum communication distance of main CSMA/CA protocol in present 802.11 communication protocol is only 300 m;and the system performance declines dramatically with the increase of distance over 300 m.The cause for this problem was analyzedand a method of changing ACKtimeout in accordance with the variation of distance was providedwhich improved the performance of CSMA/CA protocol in long distance communication.Simulation was carried out with OPNET softwareand the results showed that in long distance communicationsystem throughput is improved and connected delay is reduced..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 85 (2013)
Design of a PWM Type High-Voltage Power Supply
JIANG Lixin, and LIU Buyao
The Head-Up Display(HUD) with a image source of CRT generally has high requirements to the performanceefficiencyvolume and weight of the High-Voltage Power Supply (HVPS).Having the advantages of small sizelight weight and high efficiency etcthe PWM type HVPS has found a wide application.The principle and unit circuThe Head-Up Display(HUD) with a image source of CRT generally has high requirements to the performanceefficiencyvolume and weight of the High-Voltage Power Supply (HVPS).Having the advantages of small sizelight weight and high efficiency etcthe PWM type HVPS has found a wide application.The principle and unit circuit of the HVPS was introduced.The contravariant mode was used in the circuit.The 27 VDC was changed into the needed high voltage through processing of power conversionvoltage boosting and transformationand dual voltage rectifying.Stabilizing of the voltage was realized by using the pulse width modulator SG1525A..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 89 (2013)
A Database Watermarking Algorithm Using Secret Sharing Technology
BAI Xiangfang, ZHAO Dongling, XIE Zhaoli, and ZHANG Xiaona
Considering the security issues in database joint owners authority management and in modification of databasewe put forward a database watermarking algorithm based on secret sharing technology.In the algorithmthe relational databases used secret sharing technology to embed the watermark in the databaseand n times oConsidering the security issues in database joint owners authority management and in modification of databasewe put forward a database watermarking algorithm based on secret sharing technology.In the algorithmthe relational databases used secret sharing technology to embed the watermark in the databaseand n times of interpolation were implemented to the database watermarking using Lagrange interpolation formulathus to realize database watermark embedding and recoveryand the database owner could be jointly responsible for the security of the database and robustness.Simulation experiments showed that the proposed algorithm can reduce the redundancy of database enhance security safety of database watermarkand has certain robustness to watermark detection when some of the data in the database are deleted..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 93 (2013)
Design and Realization of a Three-Axis Stabilized Orthographic Platform for Aerial Survey
YUAN Hongwei, MIN Zhifang, and ZHANG Jianmin
A three-axis stabilized orthographic barrel was designed for aerial survey.This barrel carried an high-definition (HD) digital camera and a micro-TVand realized orthographic observation and photograph with inertial stability by using angular speed closed-loop control mode and inertial pointing position closed-loop conA three-axis stabilized orthographic barrel was designed for aerial survey.This barrel carried an high-definition (HD) digital camera and a micro-TVand realized orthographic observation and photograph with inertial stability by using angular speed closed-loop control mode and inertial pointing position closed-loop control mode.Different from traditional gyro installation in bearing ringthis barrel used independent MEMS GPS integrated navigation system to realize disturbance isolation and orthographic direction.The desired angle position and angle speed compensation equation when the integrated navigation system was installed on the barrel shell were derivedand the design principlemethod and model of control modules were presented.The testing results showed that the stabled line of sight is perpendicular to the groundthe orthographic error can be controlled within 3°which can guarantee the longitudinal and transverse overlapping ratereduce the appearing of aerial photograph hole..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 96 (2013)
Optimization Design of Double-Step-Down-Stress Accelerated Degradation Test Based on Monte-Carlo Simulation
PAN Gang, LIANG Yuying, Lv Meng, and ZHANG Guolong
Considering to the problems of long test timehigh cost and low efficiency for the double-step-down-stress degradation test for high-reliabilitylong-life productswe presented an optimal design method based on Monte-Carlo simulation for double-step-down-stress accelerated degradation test(DSDS-ADT).Simulation was madeConsidering to the problems of long test timehigh cost and low efficiency for the double-step-down-stress degradation test for high-reliabilitylong-life productswe presented an optimal design method based on Monte-Carlo simulation for double-step-down-stress accelerated degradation test(DSDS-ADT).Simulation was made for the acceleration test with Monte-Carlo method.Taking the number of inspections on each unitthe number of test units and inspection frequency as variablesand the total experimental cost as a constraintthe asymptotic variance estimation of 100 pth percentile of the lifetime distribution of the product as goal functionwe established the optimal designed model of DSDS-ADT based on Monte-Carlo simulation.Simulation results verify the feasibility and the validity of this methodand provided a theoretic support for optimal design of accelerated test in life prediction of electronic equipment..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 20, Issue 6, 100 (2013)
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