Journals >Electronics Optics & Control
Contents
2014
Volume: 21 Issue 9
23 Article(s)
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Research Article
The Tactical Maneuver in Cyber Space
[in Chinese], [in Chinese], and [in Chinese]
In this paperthe concept and classification of the Cyber maneuver and the features of the Cyber combat unitare introduced based on the existing research results and the environment and requirements of the future warfare.According to the features of the tactical maneuver in Cyber spacethe difficulties and possibilityIn this paperthe concept and classification of the Cyber maneuver and the features of the Cyber combat unitare introduced based on the existing research results and the environment and requirements of the future warfare.According to the features of the tactical maneuver in Cyber spacethe difficulties and possibility of fusing the tactic maneuvers of Cyber space with that of the other spaces are discussed..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 1 (2014)
Threat Level Assessment Based on Fuzzy Bayesian Networks
DING Dali, LUO Jianjun, WANG You, and LIU Wanjun
Aiming at the uncertainty of Threat Level Assessment (TLA) data sources under modern complex battlefielda fuzzy Bayesian network TLA method was proposed by integrating the fuzzy set theory into Bayesian networks.After well considering about the effect of the distance and azimuth angle of threat sources relative to a UAiming at the uncertainty of Threat Level Assessment (TLA) data sources under modern complex battlefielda fuzzy Bayesian network TLA method was proposed by integrating the fuzzy set theory into Bayesian networks.After well considering about the effect of the distance and azimuth angle of threat sources relative to a UCAV on its stealth capabilitythe threat level was evaluated by integrating such uncertain factors as weatherthreat typedistance and azimuth angle based on randomization of uncercain knowledge.Then a TLA Bayesian network was established by adopting Netica software of the Norsys Software Company in Canadaand simulation was carried out.The simulation results show that the method can assess the threat level rapidly and accurately..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 7 (2014)
A Filter Algorithm for Laser Radar Echo Signal of MultiGaussian Pulse at Low SNR
FAN Xiantang, ZHANG Bin, MA Pengge, and YANG Yi
Considering the characteristics of pulse waveform of laser echo signal in high SNR which is different from that in low SNR a wavelet filtering algorithm for low SNR Gauss pulse echo signal was studied. The definition of photoelectric detection SNR is introduced and the different SNR pulseecho waveforms are presenteConsidering the characteristics of pulse waveform of laser echo signal in high SNR which is different from that in low SNR a wavelet filtering algorithm for low SNR Gauss pulse echo signal was studied. The definition of photoelectric detection SNR is introduced and the different SNR pulseecho waveforms are presented in the paper. Then the echo signal accumulation in time domain and smooth filtering algorithm under high SNR conditions are studied. The simulation and analysis of the performance of the algorithm are given. Subsequently for the multiGaussian pulse in the low SNR of the target pulse waveform the lowfrequency wavelet coefficient reconstruction filter is adopted and an appropriate wavelet function and decomposition level are selected by simulation experiments..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 11 (2014)
Operational Effectiveness Evaluation of Fighter Aircrafts in Air Combat
CHEN Guoji, JIANG Changsheng, and WU Qingxian
At presentthe estimation to the fighter aircraft capability is developed from function concerning to efficacy concerningand how to evaluate the operational effectiveness of the aircrafts in air combat has been explored for a long time.The air combat process is resolved into two parts of beyondvisualrange and withinAt presentthe estimation to the fighter aircraft capability is developed from function concerning to efficacy concerningand how to evaluate the operational effectiveness of the aircrafts in air combat has been explored for a long time.The air combat process is resolved into two parts of beyondvisualrange and withinvisualrange air combat according to the mode of modern air combatand operational effectiveness of the fighter aircraft is evaluated respectively.In allusion to stealth fighterthe radar detection abilitypassive radar detection ability and infrared detection ability are put forward as indexes of situational awareness ability for beyondvisualrange air combat.Analytic hierarchy process is used for operational effectiveness evaluation to both the beyondvisualrange and within visualrange air combatand the ability models are presented..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 16 (2014)
On UCAV's Air to Air Autonomous Attack
LUO Chang, HUANG Changqiang, CAI Yawei, JIAO Pengbob, and WANG Yong
In airtoair autonomous attackthe Unmanned Combat Aerial Vehicles (UCAV) has the disadvantages of small attack zonepoor mobilityand time lag of information link.To solve the problemsan approach of autonomous attack was proposed aimed to improve attack precision and combat effectiveness.Kinematic and dynamic modelsIn airtoair autonomous attackthe Unmanned Combat Aerial Vehicles (UCAV) has the disadvantages of small attack zonepoor mobilityand time lag of information link.To solve the problemsan approach of autonomous attack was proposed aimed to improve attack precision and combat effectiveness.Kinematic and dynamic models of UCAV and the guided missile were formed based on the characteristics of airtoair autonomous attack.The attack zone and noescape zone were calculated out by using the pattern search algorithmthrough which the optimum launch position was indicated.To arrive at the optimum launch positionsliding mode control was used to design the process of autonomous attacking occupationwhich was simulated later.The simulation result demonstrates that UCAV can arrive at the optimum launch position in a short time with stable gestureand attack the target effectively..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 19 (2014)
Guidance Law Design with Impact Angle and View Angle Constraints
XI Jie, YANG Jun, and ZHU Xueping
In order to attack the top of a target at large terminal anglethe optimal guidance law with impact angle constraint is applied to control the terminal angle of the missile. Since it may occur that the target moves beyond the seekers field of viewa guidance law with an amendment part is designedi.e.introducing a paIn order to attack the top of a target at large terminal anglethe optimal guidance law with impact angle constraint is applied to control the terminal angle of the missile. Since it may occur that the target moves beyond the seekers field of viewa guidance law with an amendment part is designedi.e.introducing a part based on the optimal guidance law. The part works if the view angle exceeds the predefined value to maintain the target inside the field of viewand is turned off to apply the original guidance law if not. The new guidance law can not only retain the high angle characteristics of original soptimal guidance lawbut also deal with the view angle problem effectively. Simulation results show that it is feasible to achieve navigation with impact angle and view angle constraints by this method..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 26 (2014)
Path Planning of Aircrafts Under Threat Netting
ZHANG Taosha, LU Yi, Lv Yue, and ZHANG Liang
In usual threat modelingthe information exchange among the threats is often ignored.To solve the problema target instruction probability model was established.On which basisa threat netting model based on detection probability was built up.Common path cost function was improved by using the threat netting model.The In usual threat modelingthe information exchange among the threats is often ignored.To solve the problema target instruction probability model was established.On which basisa threat netting model based on detection probability was built up.Common path cost function was improved by using the threat netting model.The Differential Evolution Algorithm (DEA) was introducedand analysis was made to the effect of threat netting on threat intensity and threat cost of waypoint by using the method.Simulation was made to the effect of the threat netting model on path planningwhich shows the necessity and feasibility of threat netting model..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 29 (2014)
Repeated Information Removing and Data Fusion in Distributed Sensor Networks
RAN Huaming, ZHOU Rui, WU Jiang, and CHEN Shaodong
The multipath under network environment may cause the fusion node using the past information repeatedlywhich may lead to excessive data fusion and severe estimation bias.To solve the problema distributed information fusion algorithm based on communication connection matrix is presented.The connection matrix for a moThe multipath under network environment may cause the fusion node using the past information repeatedlywhich may lead to excessive data fusion and severe estimation bias.To solve the problema distributed information fusion algorithm based on communication connection matrix is presented.The connection matrix for a moment is obtained through the communication topology of the sensor network at that momentthe duplicate priori information is found and eliminated by calculating the connection matrix，and the corresponding distributed information fusion algorithm is established.The simulation results show that this algorithm can eliminate the influence of repeated information in the network to the fusion performance..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 34 (2014)
A Location Point Fusion Method Based on Probability Density Function
ZHANG Kui, LUO Jingqing, and LIU Wei
To deal with the multiple location points fusion problem of aerial observation platform to the emitter on the grounda fusion method based on probability density function is proposed.After the analysis to the maximum likelihood (ML) estimation methodtwo fusion methodsthe sum method of the probability density functioTo deal with the multiple location points fusion problem of aerial observation platform to the emitter on the grounda fusion method based on probability density function is proposed.After the analysis to the maximum likelihood (ML) estimation methodtwo fusion methodsthe sum method of the probability density function (SPDF) and the modified ML (MML) methodare proposed.Location points are fused through the sum of each points probability density function and the choice of data window to improve the location precisionand the fusion problem in the case of wild observation points and multiple emitters was solved.Simulation results verify that the algorithm can effectively fuse multiple location points to improve the locating precisionand the performance of SPDF method is more robust than the MML method..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 40 (2014)
FixedLag Smoothing Algorithm for Markov Switching Systems
XU Yang, XU Songtao, TANG Shujuan, and CHEN Wen
A suboptimal approach to the fixedlag smoothing problem was proposed based on Markov switching system.By introducing stateaugmented system in the interacting multiple model frameworkwhich combined the current state with the past onethe state prediction was made synchronously with the smoothing for the original systA suboptimal approach to the fixedlag smoothing problem was proposed based on Markov switching system.By introducing stateaugmented system in the interacting multiple model frameworkwhich combined the current state with the past onethe state prediction was made synchronously with the smoothing for the original system.The fixedlag mode probabilities were estimated by using the current observation datawhich is a simple but effective method.The proposed smoothing algorithm was compared with that of the normal IMMEKF filtering algorithm through the trajectory of a maneuvering target.The result shows that the performance of the fixedlag IMM smoothing algorithm is great better than that of laterand the performance tends to get better with the increasing of the lag..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 45 (2014)
Simulating Calculation and Visual Analysis on the Coverage of MultiRadar Sensor Based on CGAL
MU Chao, LI Qinfu, and XU Yao
In the presentit is difficult and important to calculate and draw the coverage of multiradar sensor rapidly in real time.To solve the problemon the basis of analyzing the existing research achievementsthe CGAL library was introducedand a solution was proposed.Simulation analysis was made for the typical algorithmsIn the presentit is difficult and important to calculate and draw the coverage of multiradar sensor rapidly in real time.To solve the problemon the basis of analyzing the existing research achievementsthe CGAL library was introducedand a solution was proposed.Simulation analysis was made for the typical algorithms of triangle grid intersected algorithm and Delaunay triangle subdivision algorithm.Experimental results demonstrate that the proposed method is effectivefeasible and practical..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 49 (2014)
Close Aerial Target Recognition Based on Data Fusion of Radar and Infrared Sensor
DI Fangxu, WANG Xiaoping, LIN Qinying, and LIU Zhe
In order to improve the performance of target recognition system and the precision of target recognition，a model based on radar and infrared sensor was proposed.For radaran algorithm based on parameter learning Bayesian network was proposed.The EM algorithm was employed for parameter optimizationand the target was clIn order to improve the performance of target recognition system and the precision of target recognition，a model based on radar and infrared sensor was proposed.For radaran algorithm based on parameter learning Bayesian network was proposed.The EM algorithm was employed for parameter optimizationand the target was classified according to its attribute information.For infrared sensorthe algorithm based on wavelet moment features was adopted.The wavelet moment features were extracted and selectedand the target image was recognized through BP neural network.FinallyDS theory was adopted to combine the recognition results of radar and infrared sensorthus the close target recognition based on radar and infrared imaging sensor was realized.Simulation results indicate that:Compared with a single sensorthe proposed model has a higher precision for target recognition..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 54 (2014)
Trajectory Control of a UAV During Net Recovery Based on Sliding Mode Control and Optimal Control
LI Ruolan, ZHEN Ziyang, and GONG Huajun
As to the problem of tracking the glide trajectory of a UAV during net recoveryan innerloop controller combining reaching law based sliding mode control with optimal control was designed on the basis of the outer loop controller with αβ filter.The stability and dynamic performance of the system were improved.Taking As to the problem of tracking the glide trajectory of a UAV during net recoveryan innerloop controller combining reaching law based sliding mode control with optimal control was designed on the basis of the outer loop controller with αβ filter.The stability and dynamic performance of the system were improved.Taking a small UAV as an examplewe made a threedimensional digital simulation to the whole netrecovery process.The simulation results show that this controller can realize accurate control of the attitude and trajectory of the UAV during its landingand realize netrecovery accurately even when the deck is in movement..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 58 (2014)
Design and Simulation of MultiData Link Networking Based on OPNET
ZHAO Keli, LI Zheng, LI Hao, WANG Mengdi, and XU Yajun
With the wide application of Tactical Data Links (TDLs) in military affairsthe requirements of integrated networks of multiple TDLs was proposed．Due to the limit quantity of participating nodes in tactical applicationsthe IPmapping gateway in network layer based on link priority rule was proposed to achieve network With the wide application of Tactical Data Links (TDLs) in military affairsthe requirements of integrated networks of multiple TDLs was proposed．Due to the limit quantity of participating nodes in tactical applicationsthe IPmapping gateway in network layer based on link priority rule was proposed to achieve network integrationand an integrated multiTDL node model was created.Finallythe scheme was verified through simulation with a typical tactical network of 20 nodes..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 61 (2014)
Safety Control for UAV Formation Reconfiguration Based on Modified Differential Evolution
Lv Minghai, WEI Ruixuan, and XU Zhuofan
Flight formation of multiple UAVs needs to be reconfigured when the environment changes or missions are modified.Based on the analysis of safety problem during reconfigurationthe process is transformed into a series of online optimizations using distributed model predictive control (DMPC).After the setup of cost funcFlight formation of multiple UAVs needs to be reconfigured when the environment changes or missions are modified.Based on the analysis of safety problem during reconfigurationthe process is transformed into a series of online optimizations using distributed model predictive control (DMPC).After the setup of cost function with safety restriction taken into considerationa distributed model predictive control algorithm based on modified differential evolution (DEDMPC) is put forward to deal with the optimization problems at each interval.Simulations show the effectiveness of the DEDMPC algorithm for reconfiguration safety control.The algorithm is superior to the standard DE algorithm in terms of performance..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 65 (2014)
Design of a DualBand/DualFOV Infrared Telescope
PAN Zhifeng, LIU Sha, and ZHANG Peng
The dualband/dualFOV optical system can improve the detection capability of an IR system.The optical design theory of dualband/dualFOV telescope system was studied and a dualband/dualFOV telescope system was designed.The system can switch between the FOVsand three kinds of optical material were usedincluding GeThe dualband/dualFOV optical system can improve the detection capability of an IR system.The optical design theory of dualband/dualFOV telescope system was studied and a dualband/dualFOV telescope system was designed.The system can switch between the FOVsand three kinds of optical material were usedincluding GeZnSe and BaF2.The simulation result shows that the system has simple structure and fine imaging qualityand the MTF value is higher than 0.5 at the spatial frequency of 16 lp/mm..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 71 (2014)
Evaluation of Air Combat Training System
PAN Weihua, YU Xiwu, DENG Yongli, LI Guoying, and SHI Jingping
The critical problem of air combat evaluation was studied.Analysis was made to the data acquisition and processing mode of the evaluation systemand a data processing model was established.Track association method was used to solve the problem of target identification.Based on the features of current air combatthe metThe critical problem of air combat evaluation was studied.Analysis was made to the data acquisition and processing mode of the evaluation systemand a data processing model was established.Track association method was used to solve the problem of target identification.Based on the features of current air combatthe methods for weapon operation evaluation and for training evaluation under complicated environment were presented with the conclusion..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 76 (2014)
Operating Force of Flight Simulator Control Loading System：Modeling and Simulation
YANG Yongxin
Based on a certain irreversible flight control system of civil aircrafta model was established for electric control loading system of flight simulator.Taking the elevator system as an examplecentralized processing was made to the distributed subsystem parametersthe mathematical model of flight control system was seBased on a certain irreversible flight control system of civil aircrafta model was established for electric control loading system of flight simulator.Taking the elevator system as an examplecentralized processing was made to the distributed subsystem parametersthe mathematical model of flight control system was set upand the composite control method was embedded into the electric control loading system.Simulation experiment was made by using an experiment system developed by our companyand the results was compared with the actual flight test curves of the Boeing Company.The results show that the operating force error is less than 10%the rudder angle deflection angle error is less than 2%which can satisfy the requirement of CCAR60 to the accuracy of flight simulator control loading system..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 80 (2014)
SubAperture Hough Transform Based SAR Rotational Target Detection
CHEN Wen, ZHANG Zhijun, QIN Zhanshi, DENG Youwei, and MA Ying
Due to the influence of clutterthe SAR echo of rotational target rangecompressed domain presents a discontinuous sinusoidwhich makes it difficult to be detected.A new algorithm based on subaperture Hough Transform was proposed to detect rotational target.The detection time duration is divided into multiple coherentDue to the influence of clutterthe SAR echo of rotational target rangecompressed domain presents a discontinuous sinusoidwhich makes it difficult to be detected.A new algorithm based on subaperture Hough Transform was proposed to detect rotational target.The detection time duration is divided into multiple coherent processing intervals (CPIs) for integration.The echo in same range cell was coherently integrated via Fast Fourier Transform (FFT) within each CPI to increase SNRand noncoherent integration was made among all CPIs via generalized Hough transform for clutter reduction.The proposed approach is suitable for singlechannel SAR system that has a lower hardware cost.The twostage detecting method has better performance on clutter cancellation and rotational target detection.The results of the simulation indicate the effectiveness of the method..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 85 (2014)
Application of DoDAF Based Architectural Model in Mission System Design of Antisubmarine Aircraft
SHEN Yanjun
The architectural model based on DoDAF2.0 was studiedand the definitions and application of the new content of DoDAF2.0 were analyzed.An architectural model of an antisubmarine plane was established by using the UML tools.In additionthe benefits of modeling based on the open architectural of DoDAF were analyzed.The The architectural model based on DoDAF2.0 was studiedand the definitions and application of the new content of DoDAF2.0 were analyzed.An architectural model of an antisubmarine plane was established by using the UML tools.In additionthe benefits of modeling based on the open architectural of DoDAF were analyzed.The problems might appear in engineering and how to solve them were also discussed..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 90 (2014)
MidGuidance Instruction Calculation of Medium Range Air to Air Intercept Missile
KANG Zhiqiang, KOU Yingxin, LI Zhanwu, and CHEN Lei
The principle and the existing problems of radio amendment instruction consisted in the classical mediumrange airtoair intercept missile are described. Then a new method of variable period midguidance instruction is proposed. A variable period instruction model is established based on the Current Statistical Model The principle and the existing problems of radio amendment instruction consisted in the classical mediumrange airtoair intercept missile are described. Then a new method of variable period midguidance instruction is proposed. A variable period instruction model is established based on the Current Statistical Model (CSM) of target. The predicted target motion value is introduced into midguidance instruction,and the period of midguidance instruction is changed according to the estimated remaining time of midguidance. The simulation result indicates that the modified instruction model can improve the tracking efficiency of seeker and limit the error of targets designation angle in intercepting and capturing..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 95 (2014)
A Digital Prototype Based Reliability Design and Analysis Method for Electronic Products
LIU Liu, ZHOU Lin, and SHAO Jiang
A reliability design and analysis method for electronic products was proposed based on the digital prototype.Firstthe common stress damage models of electronic products are analyzed.Based on the theory of physicsoffailureand taking the design information and prospective working condition of the electronic products A reliability design and analysis method for electronic products was proposed based on the digital prototype.Firstthe common stress damage models of electronic products are analyzed.Based on the theory of physicsoffailureand taking the design information and prospective working condition of the electronic products as the inputswe analyzed the stress properties of the products under the life profile through computer modeling and simulation.Then failure analysis was conducted based on the stress damage modelthus the failure information matrix was obtainedand a reliability design and analysis method was proposed based on digital prototype of the product.The analysis results to an aero electronic product example show that this method can find the vulnerable spots of the reliability designpresent prevention measures for improving the design and eliminating the potential faultsthus can improve the inherent reliability of the electronic product ultimately..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 99 (2014)
Reliability Assessment for a Certain Type of Electrical Connector Based on StepStress Accelerated Degradation Test
WANG Haowei, XU Tingxue, and ZHANG Xin
Since a certain type of missile electrical connector is a product with high reliability and long lifetimeit is difficult to obtain failuretotime data in a short time.For assessing the reliability of the producta stepstress accelerated degradation test was designed based on analysis to its failure mechanism.ThenthSince a certain type of missile electrical connector is a product with high reliability and long lifetimeit is difficult to obtain failuretotime data in a short time.For assessing the reliability of the producta stepstress accelerated degradation test was designed based on analysis to its failure mechanism.Thenthe reliability function at the normal use stress level was extrapolated from the accelerated degradation data.In the testthe contact resistor was taken as the performance index and temperature was used as accelerated stress.When analyzing degradation dataWiener process was adopted to model the degradation process.A maximum likelihood function integrating all the degradation data was established for improving the accuracy of estimation.The results show that the proposed approach based on analyzing accelerated degradation data is practical and effectivewhich can realize the reliability assessment of the missile electrical connector and can be extended to evaluate the reliability of other highly reliable products..
Electronics Optics & Control
- Publication Date: Jan. 01, 1900
- Vol. 21, Issue 9, 104 (2014)
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