Journals >Electronics Optics & Control
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2021
Volume: 28 Issue 9
18 Article(s)
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Collaborative Path Planning Based on Improved RRT-Connect Algorithm
ZHANG Danmeng, ZHEN Ziyang, and CHEN Yan
This paper proposes a UAV cooperative path planning method based on improved two-way rapid expansion random tree (RRT-Connect) algorithm.Firstlyin view of the low efficiency of the basic RRT-Connect algorithm and the limitation of random samplingan improved RRT-Connect algorithm is proposed.By introducing the target This paper proposes a UAV cooperative path planning method based on improved two-way rapid expansion random tree (RRT-Connect) algorithm.Firstlyin view of the low efficiency of the basic RRT-Connect algorithm and the limitation of random samplingan improved RRT-Connect algorithm is proposed.By introducing the target gravity and controlling the sampling rangethe invalid samplings are reduced and the convergence speed is improved.The using of chaotic sequences ensures the sampling nodes have a certain randomness.Based on the improved algorithmthe constraints of the path planning model are considered and the artificial potential field is introduced to propose a collaborative path planning method.Simulation experiments verify that the improved algorithm is superior to the original algorithmand the effectiveness of the collaborative path planning method is proved..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 25 (2021)
One-Stage Object Detection Algorithm Based on Improved YOLOv3
LIU Jiannan, and NIE Kai
Aiming at the requirement of both high detection accuracy and high detection speed in the object detection fieldBalanced YOLO (B-YOLO)a one-stage object detection algorithm is proposed.Firsta spatial attention mechanism is introduced in the algorithmand the multi-scale maximum pooling layer is used to increase the Aiming at the requirement of both high detection accuracy and high detection speed in the object detection fieldBalanced YOLO (B-YOLO)a one-stage object detection algorithm is proposed.Firsta spatial attention mechanism is introduced in the algorithmand the multi-scale maximum pooling layer is used to increase the range of the receptive field.Thenthe cross-stage local connection structure and the pass-through layer are adopted to optimize the backbone network structure and improve the computational efficiency.Finallya bottom-to-top path is added to the multi-scale detection structureand splicing is used for transverse connection to effectively fuse the deep semantic information with the shallow location information. Experimental results show that the algorithm has achieved a good balance between accuracy and speed..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 30 (2021)
WTA of Ground Target Attacking Based on Evolutionary Multi-objective Optimization
ZHANG Yingxin, XU Yuanzi, GUO Dong, and ZHANG Meng
The multi-objective optimization method is adopted to study the modeling of Weapon-Target Assignment (WTA) in ground target attacking.Firstlybased on the analysis to the characteristics of the ground target attackinga multi-objective optimization mathematical model is established.The optimization objectives are definThe multi-objective optimization method is adopted to study the modeling of Weapon-Target Assignment (WTA) in ground target attacking.Firstlybased on the analysis to the characteristics of the ground target attackinga multi-objective optimization mathematical model is established.The optimization objectives are defined as the minimum risk of aircraft in penetration and the maximum target damage efficiencyand a quantitative method for evaluating the threat of air defense fire power to the aircraft is proposed based on grid map.Thenthe Non-dominated Sorted Genetic Algorithm-Ⅱ(NSGA-Ⅱ) is adopted to solve the problemand the components of the algorithm are designed.Finallya simulation example is built for experimental analysis.The simulation results show that the model and method in this paper can effectively solve WTA problem of ground target attackingwhich provides a reference for engineering implementation..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 34 (2021)
Global Dynamic Path Planning Combining Improved A* Algorithm with Dynamic Window Approach
ZHANG Zhiwen, ZHANG Peng, MAO Huping, LI Xiaojie, and SUN Quan
In order to solve the problem of mobile robot path planninga global dynamic path planning method is designed combining improved A* algorithm with Dynamic Window Approach(DWA).Firstbased on the traditional A* algorithm and the JPS algorithmthe child nodes are extended and jumped to improve the efficiency of path planIn order to solve the problem of mobile robot path planninga global dynamic path planning method is designed combining improved A* algorithm with Dynamic Window Approach(DWA).Firstbased on the traditional A* algorithm and the JPS algorithmthe child nodes are extended and jumped to improve the efficiency of path planning.Secondlythe planned path is smoothed and optimized by using Floyd algorithm.FinallyDWA is integrated so that the A* algorithm can perform global dynamic path planning.Based on the Matlab platformsimulation experiments of the global dynamic path planning algorithm are conducted for 8 kinds of grid maps.The analysis result shows that the fusion algorithm is greatly improved in efficiency and smoothnessand can perform dynamic obstacle avoidance.The global dynamic path planning algorithm after fusion and improvement has excellent path planning capabilities..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 39 (2021)
Consistency Analysis of Heterogeneous Multi-agent Systems with Nonlinear Terms
YU Jimin, and WANG Yousi
To the consistency problem of the heterogeneous multi-agent system with first-order linear and quadratic non-linear terms under the condition of undirected topologythe sufficient condition for the heterogeneous system to achieve consistency was obtained by modifying an existing distributed control protocoland by usinTo the consistency problem of the heterogeneous multi-agent system with first-order linear and quadratic non-linear terms under the condition of undirected topologythe sufficient condition for the heterogeneous system to achieve consistency was obtained by modifying an existing distributed control protocoland by using graph theoryLyapunov stability theory and the theory of Lasalle invariant set.Simulink was used to build a heterogeneous multi-agent platform with nonlinear linkswhich was composed of quad-rotor UAVs and small intelligent vehicles.The theoretical results of this paper were verified on this platform.The final numerical simulation results showed that the heterogeneous multi-agent system could achieve consistency under this protocol if the conditions in the paper were met..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 44 (2021)
Research on Radar Interference Recognition Method Based on AlexNet
GUO Zhirui, LU Jun, LIU Lei, ZHANG Weitao, and HUI Hui
Aiming at the radars classification and recognition of the interference signal under complicated electromagnetic environmentwe studied the Choi-Williams Distribution (CWD) time-frequency images of the RF noise interferencenoise-amplitude-modulation interferencenoise-frequency-modulation interferencerange gate pullAiming at the radars classification and recognition of the interference signal under complicated electromagnetic environmentwe studied the Choi-Williams Distribution (CWD) time-frequency images of the RF noise interferencenoise-amplitude-modulation interferencenoise-frequency-modulation interferencerange gate pull off interference at a constant speedand speed gate pull off interference.The AlexNet convolution of deep learning neural network model was adopted to automatically extract the image features of detailsso as to realize the classification and recognition of radar intereference signal.The simulation results showed that:1) The recognition rate of the network increases rapidly with the increase of the interference-to-noise ratio in the range of -10 dB to 0 dBand the recognition rate is basically close to 100% when the interference-to-noise ratio is above 0 dB;and 2) In the full range of interference-to-noise ratiothe networks recognition accuracy rate is 99.25%and the recognition effect is good..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 49 (2021)
On Top-Level Architecture of PHM for Manned/Unmanned Aerial Vehicle Cooperative Fleet
SONG Liru, PEI Zixuan, and LIU Dong
As the one of the key technologies and an important part in the design and operation of the new generation aircraftPrognostics and Health Management (PHM) technology has been widely concerned by numerous experts and scholars at home and abroad.In view of the unmanned and collaborative features of the future aviation eAs the one of the key technologies and an important part in the design and operation of the new generation aircraftPrognostics and Health Management (PHM) technology has been widely concerned by numerous experts and scholars at home and abroad.In view of the unmanned and collaborative features of the future aviation equipmentan analysis is made to the operation scene of the PHM system for manned and unmanned aerial vehicle cooperative fleet by using the system engineering method.The system requirements are studied by modeling the system case diagram and system activity diagram.Thenthe top-level architecture of PHM for manned and unmanned aerial vehicle cooperative fleet is proposedwhich contains functional architecture designlogic architecture design and data transmission service.Some key technologies involved in the system design are also discussed.The research has certain significance for the design of the PHM system for manned and unmanned aerial vehicle cooperative fleet..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 54 (2021)
Research Status of Radar Forward-Looking Imaging Technology
FAN Chenyang, HE Sisan, and GUO Qian
To solve the problem that the forward direction of radar does not have enough Doppler bandwidth thus it is difficult to use the Synthetic Aperture Radar (SAR) imaging technologydeep researches have been carried out on the radar forward imaging technology from multiple aspectsand have been applied in missile precisioTo solve the problem that the forward direction of radar does not have enough Doppler bandwidth thus it is difficult to use the Synthetic Aperture Radar (SAR) imaging technologydeep researches have been carried out on the radar forward imaging technology from multiple aspectsand have been applied in missile precision striketerrain recognitiontarget positioning and aircraft autonomous landing.This paper comprehensively introduces the history of the researches on forward-looking imaging technologyand make classification to the technology systematically according to imaging principleradar model and detection signals.The basic principles and characteristics of the imaging technology based on convolution inversion single pulse imaging technologymicrowave correlation technologyarray radar imaging and bistatic forward-looking imaging are mainly described.The research status and development trend of various forward-looking imaging technologies are summarized..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 59 (2021)
Thrust Allocation Design of Three-Axis Air Bearing Test Bed
CHEN Zhiming, LUO Zhouhuai, and WU Yunhua
The design of the air conditioning system of the three-axis air bearing test bed directly affects the accuracy of the control system and the air-conditioning consumption.In this paper the thrust allocation problem in the air conditioning control of the three-axis air bearing test bed is studied.Aiming at the redundantThe design of the air conditioning system of the three-axis air bearing test bed directly affects the accuracy of the control system and the air-conditioning consumption.In this paper the thrust allocation problem in the air conditioning control of the three-axis air bearing test bed is studied.Aiming at the redundant thrust allocation problem two methods are designed to optimize the thrust allocation of the three-axis air bearing test bed.The corresponding theoretical analysis and experimental research are carried out from the perspectives of expense and accuracy.The rationality and effectiveness of the proposed method are verified by mathematical simulation and experiment.The research results meet the requirements of finding a good cold air thrust allocation scheme quickly after the expected torque is given the steps of thrust allocation are simplified and the problem of waste of cold air caused by the redundant allocation of the thruster is effectively solved and the control accuracy of air conditioning is within the design range.The experimental results show that the accuracy of air-conditioning control can reach 0.4° and the task of attitude control with only four thrusters at a time is realized..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 65 (2021)
Effectiveness Evaluation of Avionics System Based on Wavelet Neural Network
YU Jing, ZHOU Xuan, HE Feng, and GU Xiaoyan
Avionics system is an important part of modern fighterand it is an important support means to achieve mission integrationcapability integration and resource integration.The performance of combat aircraft is closely related to the effectiveness of avionics system.Aiming at the problems of complex evaluation index systAvionics system is an important part of modern fighterand it is an important support means to achieve mission integrationcapability integration and resource integration.The performance of combat aircraft is closely related to the effectiveness of avionics system.Aiming at the problems of complex evaluation index system of avionics system and great divergence of expert evaluationsthis paper designs an effectiveness evaluation method for avionics system based on wavelet neural network methodand presents an avionics effectiveness evaluation system.Based on the Analytic Hierarchy Process (AHP)the index system is constructed.Finallythe weights are obtained through judging and scoring of the expertsand the judgment value is modified through wavelet neural network.Compared with avionics effectiveness evaluation under specific capabilitythe evaluation system has more abundant indexes and good correction effect on the weights of the indexeswhich provides a tool prototype support for avionics system effectiveness evaluation..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 70 (2021)
Detecting and Locating of Foreign Object Debris on Airport Runway
LAN Tingxin, JIANG Jin, SHANG Shuai, and SHENG Shouzhao
The detection of Foreign Object Debris (FOD) is of great significance to airports safety operations.To this enda set of UAV-based FOD detecting and locating system is designed.The system adopts the roundabout route planning strategy of multi-UAV collaboration to collect images across the airport runway.For FOD locatiThe detection of Foreign Object Debris (FOD) is of great significance to airports safety operations.To this enda set of UAV-based FOD detecting and locating system is designed.The system adopts the roundabout route planning strategy of multi-UAV collaboration to collect images across the airport runway.For FOD location marking probleman automatic aligning and stitching algorithm based on RootSIFT feature matching is proposed and used to restore the panoramic image of the airport runway.Finallythe Faster R-CNN detector is designed to realize the detecting and locating of FOD.The test results based on the measured data show thatthe system can improve the FOD detection efficiency and obtain a satisfactory detecting and positioning effect..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 75 (2021)
Eliminating the Disturbance of Momentum Wheel to Fiber Optic Gyroscope by Combined Filter
ZHANG Jinbao, HUI Xin, LIU Jing, GU Baojuan, and YUE Wenjie
A combined low-pass filtering technology for space Fiber Optic Gyroscope (FOG) is proposedwhich is easy to implement in FPGA.When the momentum wheeli.e.the actuator of satelliterotates at high speedit will cause low-amplitudehigh-frequency vibration of the satellitewhich is harmful to the satellite.If the bandwiA combined low-pass filtering technology for space Fiber Optic Gyroscope (FOG) is proposedwhich is easy to implement in FPGA.When the momentum wheeli.e.the actuator of satelliterotates at high speedit will cause low-amplitudehigh-frequency vibration of the satellitewhich is harmful to the satellite.If the bandwidth of FOG is too highthe high-frequency vibration will lead to greater noiseand even mixed output of FOGwhich will result in degraded control quality of the satellite.In consideration of both cost and effect of the filterwe propose a design scheme of FIR + IIR combined filter.The scheme uses five hundred and sixteen logic unitswhich only accounts for 13.8% of the chip resources of A54SX72A.It can be added to the FPGA program of FOG closed digital loop.The advantage is that it is easy to realize high-speed filtering and improve the effect of filtering out the high-frequency interference signals.In this waythe users dont have to design filters separately in other terminals.The configuration cost of the whole satellite control system is reducedand the application configuration of space FOG is simplified..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 80 (2021)
ESO Based RBF Neural Network PID Controller for Quadrotor Aircrafts
LIU Chunling, WANG Ming, and ZHANG Jin
The parameter uncertainty and environmental interferences may result in unstable attitude of quadrotor aircraftsand the traditional PID control cant meet the control requirements of the quadrotors attitude stability and maneuverability.Aiming at the probleman Extended State Observer (ESO) neural network RBF PID conThe parameter uncertainty and environmental interferences may result in unstable attitude of quadrotor aircraftsand the traditional PID control cant meet the control requirements of the quadrotors attitude stability and maneuverability.Aiming at the probleman Extended State Observer (ESO) neural network RBF PID controller is proposed.Firstlythe extension characteristics of ESO and nonlinear functions are used to estimate and compensate for disturbances to reduce system errors.Secondlythe ESOs estimated value of the system output is used as the input of the RBF neural networkto make the gradient information more accurate and better optimize the parameters of the incremental PID.Finallya Gaussian function is adopted as the excitation function of the neural networkand the model control parameters are adjusted by using the self-adaptability and self-learning ability of the RBF neural network.The Matlab simulation experiment shows that:in the unknown interference environmentthe ESOs RBF neural network PID controller can significantly improve the anti-interference ability of the system,and has a smaller overshoot and better robustness..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 84 (2021)
A Test Optimization Selection Method Based on MOPSO-NSGA2 Algorithm
HAN Lu, SHI Xianjun, LONG Yufeng, and ZHAI Yuyao
Test optimization selection is an important step in testability design.This paper mainly studies the test optimization selection problem under the condition of unreliable test.Firstlythe problem is reduced to a multi-objective problem for analysis.On this basisthe mathematical model of the problem is established withTest optimization selection is an important step in testability design.This paper mainly studies the test optimization selection problem under the condition of unreliable test.Firstlythe problem is reduced to a multi-objective problem for analysis.On this basisthe mathematical model of the problem is established with the test quantitytest cost and false alarm rate as the objectivesand the fault detection rate and isolation rate as the constraints.Thenbased on the Bayesian network testability modelthe MOPSO-NSGA2 algorithm is used to solve the problem.Finallythe method is used to make test optimization selection for the radio altimeter of a certain missileand a comparison is made with MOPSO algorithm and NSGA-2 algorithm.The results verify the effectiveness and feasibility of the method..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 89 (2021)
Electromagnetic Interference Technology of Balance Based on Wavelet Reconstruction
ZHANG Junbin, ZOU Qiongfen, ZHONG Jun, XU Xiaobin... and YANG Renxi|Show fewer author(s)
The support system of wind tunnel model has large motor power and complex operating environmentthus the balance signal is influenced seriously by motor electromagnetic interferencewhich may affect the accuracy of experimental data.To solve the problema technology for interference signal processing based on wavelet rThe support system of wind tunnel model has large motor power and complex operating environmentthus the balance signal is influenced seriously by motor electromagnetic interferencewhich may affect the accuracy of experimental data.To solve the problema technology for interference signal processing based on wavelet reconstruction is proposed.Firstlythe frequency threshold of wavelet reconstruction is determined based on the balance step test principle.Thenwavelet basis of db10 is usedwhich divides the signal wavelet into 10 layers.Analysis is made to each layer by Fast Fourier Transform (FFT)the signals under 1 Hz are reservedand thus signal reconstruction is realized.Through the use of wavelet reconstruction technologyElectromagnetic Interference (EMI) is significantly suppressed and the accuracy of the processed data meets the requirement on experimental accuracy..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 94 (2021)
On EBR1553 Bus Network Technology of Airborne Stores
MIAO Junmin, QIU Zhenan, GUO Wenli, SHI Zhizhao, and SHI Zhaoming
In view of network management of miniaturizedlow-cost airborne stores mounted in quantitythe application characteristics of airborne store bus network and three typical store bus networks are studied at first.Thenthe characteristicstopology structurebasic protocolextension protocol of the EBR1553 bus network and In view of network management of miniaturizedlow-cost airborne stores mounted in quantitythe application characteristics of airborne store bus network and three typical store bus networks are studied at first.Thenthe characteristicstopology structurebasic protocolextension protocol of the EBR1553 bus network and its application in airborne store network are analyzed.Finallythe feasibilities of store EBR1553 bus network technology and its application are verified through the developed simulation environment..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 98 (2021)
Simulation Research on Direct-Lift-Control Based NDI Control of Landing Trajectory
LUO Fei, ZHANG Junhong, WANG Bo, and ZHAO Hai
Aiming at the complicated carrier-landing environment and the heavy operating burden of the pilot in manual approach and precision landing control of the carrier aircrafta two-layer Nonlinear Dynamic Inversion (NDI) control method is usedand Direct Lift Control (DLC) is introduced to achieve trajectory control of theAiming at the complicated carrier-landing environment and the heavy operating burden of the pilot in manual approach and precision landing control of the carrier aircrafta two-layer Nonlinear Dynamic Inversion (NDI) control method is usedand Direct Lift Control (DLC) is introduced to achieve trajectory control of the precision carrier landing.Control allocation is applied to deal with multiple control surfaces and decoupling of control surface effects of DLC and conventional surfaces.From the aspects of trajectory and attitude decouplingsimulation analysis is made to the designed control frameworkand it is demonstrated that it is effective in achieving the precision carrier landing similar to Magic Carpet.Finallythe E-2C aircraft model is built and simulated for verification of the designed method.The results show that the control method can perfectly accomplish trajectory control in carrier landing..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 103 (2021)
Tracking Technique for Radar Network Under Range-False-Target Jamming
LI Yingchun, JIA Congle, and LI Yan
In the presence of range-false-target deceptive jammingthe radar receives false signal with high fidelitywhich is difficult to be filtered out effectively from the signal level.The false signal may enter into radar data processor and form false plotsand then form false tracks after filtering and tracking.To solve thIn the presence of range-false-target deceptive jammingthe radar receives false signal with high fidelitywhich is difficult to be filtered out effectively from the signal level.The false signal may enter into radar data processor and form false plotsand then form false tracks after filtering and tracking.To solve this problema target tracking technique is proposed based on radar network data fusion.Firstlythe position measurement data of each radar in the radar network are preprocessed respectively.Thencorrelation processing is carried out in the fusion centerand the equivalent position measurements are obtained to realize accurate positioning for targets.Finallytarget tracking is realized.The technique can overcome range-false-target deceptive jamming effectivelyand is also appropriate for non-jamming situation.Simulation results verify the application value of the technique..
Electronics Optics & Control
- Publication Date: Nov. 06, 2021
- Vol. 28, Issue 9, 108 (2021)
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