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2020

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Articles 931 - 960 of 1494

Full-Text Articles in Systems Science

Design And Implementation Of Secure Usb Connection, Songyin Zhao, Bin Yu Jun 2020

Design And Implementation Of Secure Usb Connection, Songyin Zhao, Bin Yu

Journal of System Simulation

Abstract: Aiming at the deficiency of present secure solutions countering USB-based Hardware Trojan Horse, BadUSB, bus wiretapping and other new attack technologies, a secure connection scheme applying to any USB device was proposed. In scheme, mutual authentication and key exchange were implemented by extending the standard device request in the hub driver and USB device framework driver to prevent the creation of malicious USB connection. Meanwhile, all the data transferred of the created USB connection would be filter encrypted by USB bus driver and USB device framework driver to rebel the monitor of bus. The experiment results show that the …

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Research On Pedestrian Crossing Road Skills Assist Training System Based On Game Model, Meiliang Wang, Huagen Wan, Jianping Gu Jun 2020

Research On Pedestrian Crossing Road Skills Assist Training System Based On Game Model, Meiliang Wang, Huagen Wan, Jianping Gu

Journal of System Simulation

Abstract: With the rapid growth of number of family cars in China, there are more and more road accidents, so pedestrians will undoubtedly become the biggest victims in the accidents. Thus it is of great significance to develop a road training system that is able to improve the ability of the pedestrians to process the integrated information of the traffic flow, and reduce the risk of pedestrian in accidents when crossing the roads. Based on the key researches on dynamic virtual traffic scene, human-computer interaction and virtual objects collision detection, with the application of technology of virtual reality and 3 …

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Design Of Ble Key Agreement Scheme Based On Hash Chain, Yibo Huang, Yicai Huang, Bin Yu Jun 2020

Design Of Ble Key Agreement Scheme Based On Hash Chain, Yibo Huang, Yicai Huang, Bin Yu

Journal of System Simulation

Abstract: Aiming at the problem that BLE Secure Simple Pairing protocol is vulnerable to eavesdropping and man-in-the-middle attacks, a BLE key agreement scheme based on hash chain was proposed. The scheme realized mutual authentication and link key agreement applying the unidirectivity and crashworthiness of hash chain. Update mechanism of the hash chain was designed to prevent from reuse of hash chain node values. The security analysis of BAN logic and experiment results show that, the scheme can effectively resist eavesdropping and man-in-the-middle attacks. Meanwhile, it has low storage and computation overheads.

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Study On Effects Of T-Spur-Dikes On Flow Characteristics In 90° Bend Channel By Large Eddy Simulation, Wenli Wei, Panpan Li, Shipeng Shao, Yuling Liu Jun 2020

Study On Effects Of T-Spur-Dikes On Flow Characteristics In 90° Bend Channel By Large Eddy Simulation, Wenli Wei, Panpan Li, Shipeng Shao, Yuling Liu

Journal of System Simulation

Abstract: In order to solve the problems of river erosion at concave bank and of sediment deposition at convex bank in actual bend rivers, the 3D hydraulic characteristics of bend channel with spur-dikes must be studied. The gas-liquid two-phase large eddy model was used to numerically simulate the hydraulic characteristics of flow in a 90° bend channel with a spur-dike. Comparisons of the simulated longitudinal velocity with the experimental data show a good agreement, which indicates that the large eddy model is an effective way to study the hydraulic characteristics of bend channels. The analysis of the distribution of velocity …

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Research And Implementation Of Simulation For Aircraft Crossing The Low-Level Wind Shear Area, Zhigang Su, Chen Qi, Jingtang Hao Jun 2020

Research And Implementation Of Simulation For Aircraft Crossing The Low-Level Wind Shear Area, Zhigang Su, Chen Qi, Jingtang Hao

Journal of System Simulation

Abstract: Low-level wind shear seriously affects the safety of approach and departure of flights, the flight simulation system is utilized for analyzing low-level wind shear influences on aircraft take-off and landing, which is of great significance for seeking the safety circumvention strategy of aircraft crossing the core of the storm. With software, Fluent, the system simulated the regional wind field of low-level wind shear, and utilized the open source flight simulator, FlightGear, as the aircraft simulation platform. The system sent the wind speed data as the input of system via UDP(User Datagram Protocol) interface and the influences on aircraft flight …

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Robustness Research For Adaptive Control Algorithms Of Pipe Conveying Fluid Vibration, Chen Bing, Yuanyuan Huang, Zhongjun Yin Jun 2020

Robustness Research For Adaptive Control Algorithms Of Pipe Conveying Fluid Vibration, Chen Bing, Yuanyuan Huang, Zhongjun Yin

Journal of System Simulation

Abstract: Pipes with supported ends may lose their dynamic stability due to parametric instability when they convey pulsating fluid. the piezoelectric actuators were taken as the control actuators, and built a controlling mathematical model of the pipeline system. Then aiming at the traditional PID controller’s poor robustness on pipeline system parameters, MRAC system and MRAC system based on adaptive gain of the PD were designed on the basis of Lyapunov stability theory, not only the vibration peak values of the pipeline system were suppressed in a short time, but also the controllers had better robustness on pipeline system parameters. Control …

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Sybil Attack Detection Scheme Design In Zigbee Network, Meigen Huang, Bin Yu, Zhiyin Kong Jun 2020

Sybil Attack Detection Scheme Design In Zigbee Network, Meigen Huang, Bin Yu, Zhiyin Kong

Journal of System Simulation

Abstract: Aiming at the problem of Sybil which attacks and destroys the resource allocation, routing discovery and data aggregation in ZigBee network, a scheme to detect Sybil attacks was proposed. The scheme established a doubt mechanism of Sybil node to mark child nodes in the same location as well as communication distance inconsistent geographical distance. The scheme designed a identified processes of Sybil node via father joint legal neighboring nodes transmitting a random number to the suspected Sybil nodes on different channels simultaneously, identifying Sybil nodes by its correctness. Safety analysis and experiment results show that the proposed scheme has …

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Research On Simulation Optimization Of Container Terminal’S Machinery Configuration, Zhaohui Duan, Bingliang Song Jun 2020

Research On Simulation Optimization Of Container Terminal’S Machinery Configuration, Zhaohui Duan, Bingliang Song

Journal of System Simulation

Abstract: The optimization of the machinery allocation under the double constraints of maximized efficiency for loading and unloading processes and optimal machinery usage, and the optimal configuration of bridge cranes under discrete operation modes for a single ship were instigated through modeling with the simulation software Extendsim. It was found that the real-time recording method is a more straightforward and convenient way to investigate the optimal mechanical configuration and double constraints lead to different but more reasonable results than that was obtained under the single constraint on the best mechanical configuration. Due to the discrete characteristics of the bridge crane …

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Research On Identification Of Induction Motor Parameters Ased On Nameplate Data And Pso, Xingwu Wang, Bingshu Wang, Zhaoyan Zhang, Zhibin Liu Jun 2020

Research On Identification Of Induction Motor Parameters Ased On Nameplate Data And Pso, Xingwu Wang, Bingshu Wang, Zhaoyan Zhang, Zhibin Liu

Journal of System Simulation

Abstract: A new method was proposed based on motor nameplate and particle swarm optimization (PSO) for identification of motor equivalent circuit parameters. The method effectively solved to present problems of motor equivalent circuit parameters identification method. An accurate motor equivalent circuit was built by introducing an equivalent stray-loss resistance, mechanical loss, and slip loss of ring brushes for wound motor. An identification optimization model of equivalent circuit was established based on motor nameplate parameters and motor equivalent circuit’s calculating parameters. Solving optimization model with PSO was achieved a higher probability optimization goals. The motor electrical parameters were calculatd at …

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Parameter Identification Of Induction Motor Based On Tabu-Chaotic Firefly Algorithm, Xiaoyang Xu, Wang Yan, Zhicheng Ji Jun 2020

Parameter Identification Of Induction Motor Based On Tabu-Chaotic Firefly Algorithm, Xiaoyang Xu, Wang Yan, Zhicheng Ji

Journal of System Simulation

Abstract: In order to overcome the defects of traditional induction motor parameter identification methods such as identifying less parameters simultaneously and Low identification accuracy. A multi-parameters identification method based on Tabu-chaotic Firefly Algorithm was proposed. The proposed method can simultaneously identify the stator resistance, stator inductance, rotor time constant and mutual inductance without prior knowledge about the parameters. For the sake of improving the identification accuracy, the formula of attractiveness in original Firefly Algorithm was adjusted, furthermore chaos theory and the idea of Tabu Search was integrated into the algorithm. Simulatied experimental results demonstrate that compared to the other …

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Research On Mathematical Models Of Damage Probability Approximate Computation Of Cargo Projectile, Zhaosheng Wang Jun 2020

Research On Mathematical Models Of Damage Probability Approximate Computation Of Cargo Projectile, Zhaosheng Wang

Journal of System Simulation

Abstract: The scatter size of the bomblet of cargo projectile is large by comparison with the casualty producing area of single target. In order to promote computational efficiency, and to study optimum spread area of cargo projectile and the most advantageous fire distribution conveniently, mathematical models of damage probability approximate computation of cargo projectile on small rectangular target and circular target with single-shot fire, and correlation fire that firing is on identical data were established by probability analysis. The simulation method was discussed. The optimal dispersion areas were put out according the approximate computation model of single-shot fire. …

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Numerical Investigation Of Water-Exit Cavity Flow Of Missile With Complex Configuration, Chongxian Zhang, Xianglin Li, Yuqiu Liu Jun 2020

Numerical Investigation Of Water-Exit Cavity Flow Of Missile With Complex Configuration, Chongxian Zhang, Xianglin Li, Yuqiu Liu

Journal of System Simulation

Abstract: Based on Zwart-Gerber-Belamri cavitation model, a numerical calculation method of cavitating flow of water-exit missile with complex configuration was proposed. The influence of velocity of water-exit and angle of attack to cavitation of parts of missile was analyzed. The simulation results showed that in the beginning of water-exit course, body-attached bubble quickly grew due to reduction of cavitation number. After that, the effect of bubble break-off and oscillation became more obvious. In water-exit course of zero angle of attack, the length and thickness of bubble of shoulder increased linearly with velocity. The ability of the protrusion to induce …

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Airborne Weather Radar Visual Simulation Based-On Dynamic Satellite Cloud Image, Zhang Jun Jun 2020

Airborne Weather Radar Visual Simulation Based-On Dynamic Satellite Cloud Image, Zhang Jun

Journal of System Simulation

Abstract: A real-time simulation algorithm was proposed to generate a wide range of the common aviation weather condition for the flight simulator based-on a set of dynamic satellite cloud images. With this efficient weather simulation algorithm, a fast radar echo visual simulating method was proposed. The proposed method used the 2D simplified Navier-Stokes and microphysics equations to implement the essential numerical simulation of the aviation weather condition. By this way, the complex problem of large-scale cloud resolving and particle-backscattering computing could be viewed as a simple 2D multi-resolution image processing. Real application on the flight simulator shows that the …

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Fast Fusion Method For Multi-Focus Image Based On Hierarchical Model, Lisheng Wei, Pinggai Zhang Jun 2020

Fast Fusion Method For Multi-Focus Image Based On Hierarchical Model, Lisheng Wei, Pinggai Zhang

Journal of System Simulation

Abstract: The issue of hierarchical model for multi-focus image fusion was proposed to improve the visual effect and real-time performance. According to the ambiguous zones of source image, the appropriate grid value was selected and the fusion model was proposed. By using fuzzy logic method and threshold segmentation, the gray variance values of the corresponding block were calculated and the hierarchical classification of sub-block was given to achieve the best fusion zones. Based on these, the weighted mean method was proposed to smooth the discontinuity of different block marginal area. These guaranteed the real-time performance of image fusion. The simulation …

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Research On Visual Display System Of Helicopter Flight Simulator, Zhangfa Liu, Junjie Zhang Jun 2020

Research On Visual Display System Of Helicopter Flight Simulator, Zhangfa Liu, Junjie Zhang

Journal of System Simulation

Abstract: In order to improve the effect of visual display system in helicopter simulator system, and to enhanc the installation and maintenance of equipment, the method is based on x-type side-cabin helicopter, studying from optical design, dome design, projection support and shelter design, geometry correction and edge blending design. Research was discussed from a theoretical analysis of optical design method, taking fully into account the practicality and versatility of the structure of the dome design, integrated projectors support and shade structures, as well as the unique geometric correction method of geometric reference system. This method was validated by actual project …

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Name-Embedded Couplet Creation Based On Mobile Platform, Weihua Shen, Shicheng Zhang, Shunting Wang, Zhigeng Pan Jun 2020

Name-Embedded Couplet Creation Based On Mobile Platform, Weihua Shen, Shicheng Zhang, Shunting Wang, Zhigeng Pan

Journal of System Simulation

Abstract: Couplet culture is the crystallization of Chinese traditional culture, and also is the gem of Chinese language. Given the broad mobile intelligent terminal user groups, in order to inherit and carry forward the Chinese traditional culture, Android and iOS system were taken as the design platform, combining the couplet culture and modern science and technology in an organic whole based on the study of name-embedded couplet generation algorithm. The users were allowed to get personalized couplet belong to themselves conveniently and quickly by mobile platform. The name-embedded couplet creation software was expounded in the following areas: design concept, …

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Development Trend Of Next Generation 3d Graphics Engines, Zhao Wei, Mao Ping, Fanyu Shen Jun 2020

Development Trend Of Next Generation 3d Graphics Engines, Zhao Wei, Mao Ping, Fanyu Shen

Journal of System Simulation

Abstract: The development, relationship and differences between game engine and virtual reality engine were introduced, a joint name of 3D graphics engine was proposed. The bottlenecks and shortages of scene management, geometry model creating, physics simulation, lighting, shading, etc. were analyzed by synthetically considering the advancements in computer hardware, softwares and simulation theories, etc.. The development demands and trends were researched, the Concept of adaptive multi-thread shading technology, advanced real-time dynamic deformation technology, integrated collision detection technology, independent of the collision process technology were proposed for the first time, and a brief features description of these concepts were give, it …

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Parametric Approachfor Automatic Generation Of Finite Element Modelfor Dental System, Wei Yi, Dengming Zhu Jun 2020

Parametric Approachfor Automatic Generation Of Finite Element Modelfor Dental System, Wei Yi, Dengming Zhu

Journal of System Simulation

Abstract: Aiming at overcoming the disadvantages of currentmodeling methods for dental system, such as poor efficiency and lack of personality, a method for automatic generation of finite element model for personalized dental systemis proposed. On the basis ofthe original 3Ddental model, a3Dmodel of pericementum and phatnomaiscreatedby technology of solid modeling.According tothe configuration parameters of dentition and finite elements, a finite element model of the personalized dental system is generated. Based on Ansys parametric design language, anautomatic finite element modeling system of dental system is implemented. By this modeling system, experiments are performed based on the real data of dental system …

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Parameter Identification Method Based On Lagrangemultiplier And Measuring Residual Error, He Zhi, Zhicheng Nie, Yining Qin, Youping Fan Jun 2020

Parameter Identification Method Based On Lagrangemultiplier And Measuring Residual Error, He Zhi, Zhicheng Nie, Yining Qin, Youping Fan

Journal of System Simulation

Abstract: To satisfy the security and stability control, transient and steady state analysis of power system, it is necessary to ensure the accuracy of the estimated parameters. A method of parameter identification in power system based on Lagrange multiplier and measurement method of residualis proposed through analysis of measurement residuals. A two-step approach for parameter identification is introduced. Based on Lagrange multiplier method, using thestandardized Lagrange multiplier corresponding to the parameter error the parameters with errors can be judged by the size relative to the threshold and can bedetected and identified automatically. The residual vector of measurement redundancy is …

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Doppler Ultrasound Blood Flow Signal Simulation Of Aneurysm Based On Analytical Velocity Distribution, Gao Lian, Yufeng Zhang, Jine Yan, Zhiyao Li, Kexin Zhang, Xiong Min, Suya Han Jun 2020

Doppler Ultrasound Blood Flow Signal Simulation Of Aneurysm Based On Analytical Velocity Distribution, Gao Lian, Yufeng Zhang, Jine Yan, Zhiyao Li, Kexin Zhang, Xiong Min, Suya Han

Journal of System Simulation

Abstract: For simulating the Doppler ultrasound blood flow signals in the vessels with aneurysms at different stages of development, this paper presents a simulation model in which the Doppler ultrasound blood flow signals are obtained by employing cosine-superposed constituents which are modulated by a power spectral density (PSD) estimated from velocity profile calculated by analytically solving the Navier-Stokes equations according to the axis-centerline velocity at the upstream faraway segment of the aneurysms. In the experiments, the Doppler ultrasound blood flow signals in the normal vessels and vessels with aneurysms having different dilations are generated, respectively. The simulated Doppler ultrasound blood …

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Sub-Zero Cold Start Simulation Of Hybrid Fuel Cell Vehicle Drivetrain, Xinfeng Zhang, Minghui Luo, Chuanqi Yao, Dai Wei, Guofeng Chang Jun 2020

Sub-Zero Cold Start Simulation Of Hybrid Fuel Cell Vehicle Drivetrain, Xinfeng Zhang, Minghui Luo, Chuanqi Yao, Dai Wei, Guofeng Chang

Journal of System Simulation

Abstract: Sub-zero cold start is a major obstacle for PEM fuel cell vehicle's commercialization. This paper aims to study the sub-zero cold starting process of hybrid fuel cell vehicle. A thermo-electro-mechanical coupling model was built based on the electro-chemical and thermal dynamic performance of battery and fuel cell, as well as the mechanical dynamic performance of fuel cell's auxiliary system. A computational model was also set up based on MATLAB/simulink. Through simulations under different heat powers, the energy consumption and battery state of charge are analyzed, which help to optimize power train's configuration and control strategy.

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Chemical Reaction Optimization Algorithmfor Solving Quaycrane Scheduling Problems Of Container Terminal, Wang Xu, Shixin Liu, Ruiyou Zhang, Wang Jia Jun 2020

Chemical Reaction Optimization Algorithmfor Solving Quaycrane Scheduling Problems Of Container Terminal, Wang Xu, Shixin Liu, Ruiyou Zhang, Wang Jia

Journal of System Simulation

Abstract: This paper researches on quay crane scheduling for unloading operations in container terminal. Considering quay crane work within its time window, an unloading scheduling simulation model is established.According to the characteristics of the unloading scheduling simulation model,a DoubleList Molecular Structure-based Chemical Reaction Optimization(DLMCRO) algorithm is developed. There are two parts in coding: one is the priority relation of the task, and the other is the task-to-quay-node mapping.Discrete Event Dynamic Simulation(DEDS)is used to simulate the decoding process. Four elementary chemical reaction operations against the problem are designed. The simulation experiment is …

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Application Of Virtual Reality In Plc Gas-Fired Boiler Training System, Dahu Wang, Chen Xia, Huizheng Gao Jun 2020

Application Of Virtual Reality In Plc Gas-Fired Boiler Training System, Dahu Wang, Chen Xia, Huizheng Gao

Journal of System Simulation

Abstract: In view of the problem that traditional training methods for PLC debugging can not show the running states of controlled objects in full angles, a PLC virtual simulation training platform is designed based on virtual reality technology. The system is composed of upper computer and lower computer connected by RS232 bus. The upper computer uses 3ds Max to model and render facilities, and uses Unity3D to construct the complete virtual scene. The lower computer designs PLC control board to control the virtual gas-fired boiler, which transmits data between PLC and virtual scene through the communication module. The test result …

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Modeling And Simulation Of Heat Transfer Process Of Coke Oven Twin Flue, Kun Shen, Wang Ling, Tianyu Ma Jun 2020

Modeling And Simulation Of Heat Transfer Process Of Coke Oven Twin Flue, Kun Shen, Wang Ling, Tianyu Ma

Journal of System Simulation

Abstract: To study the heat transfer process of flues in 5.5m coke oven with waste gas circulation, the heat transfer mechanism of flue in coke oven's combustion chamber and gas exchange process of twin flue were analyzed; the simulation models of upflow flue and downflow flue were built respectively. According to tables of coke pushing and coal charging sequence in coking production, combining with gas exchange process in twin flue, the simulation analysis on surface temperature characteristics of twin flue walls in real coking production process were achieved by the designed simulation model. The simulation results show that …

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Credibility Evaluation Of Hardware-In-The-Loop Simulation Test For Guided Weapons, Jianbin Dou, Xiaobing Wang, Bin Shan, Zhang Yan Jun 2020

Credibility Evaluation Of Hardware-In-The-Loop Simulation Test For Guided Weapons, Jianbin Dou, Xiaobing Wang, Bin Shan, Zhang Yan

Journal of System Simulation

Abstract: The thesis explained the concept of credibility evaluation of hardware-in-the-loop simulation. The models and the processes were introduced in three parts: credibility evaluation of simulation system, monitoring of simulation test process, and credibility evaluation of simulation results. The credibility evaluation model of hardware-in-the-loop simulation system was built based on TOPSIS and the credibility evaluation model of simulation results was built based on simulation and firing practace. This way could answer the credibility of hardware-in-the-loop simulation, and provide strong support for hardware-in-the-loop simulation in guided weapons test and evaluation.

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Application Of Distributed Clustering In Anomaly Detection Of Farm Environment Data, Deng Li, Honglin Pang, Ling Wang, Minrui Fei Jun 2020

Application Of Distributed Clustering In Anomaly Detection Of Farm Environment Data, Deng Li, Honglin Pang, Ling Wang, Minrui Fei

Journal of System Simulation

Abstract: The massive farm environment data stored in the distributed system should be dealt with so as to provide abnormal environment reference and make preventive strategies for crop yield. Considering the characteristics of the farm environment data, the Dirichlet Process Mixture Model (DPMM) clustering is implemented with the farm environment data on Hadoop and the anomaly detection method of the farm environment is proposed based on clustering analysis. Under the framework of MapReduce, Map stage implements the distribution of the sample points to the models; Reduce stage completes the update of models and the number of clusters. The performance has …

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Application Of Kpca-Esn Method In Wi-Fi Based Indoor Positioning, Li Jun, Chen Ying Jun 2020

Application Of Kpca-Esn Method In Wi-Fi Based Indoor Positioning, Li Jun, Chen Ying

Journal of System Simulation

Abstract: Aiming at the problem that the positioning accuracy is affected by the dynamic indoor environment and time-varying received signal strength (RSS) values, a Wi-Fi based indoor positioning method using kernel principal component Analysis (KPCA) and echo state networks (ESN) is proposed. The KPCA method is used to preprocess the RSS fingerprints effectively and extract the nonlinear principal components of the inputs of the model. On the basis of KPCA, the extracted principal components are taken as the inputs to the ESN network, the nonlinear mapping between corresponding positioning features and physical locations is then established by the ESN. …

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Truck Scheduling For Delivering Containers Among Multiple Container Terminals Based On Truck Appointment System, Houming Fan, Zhenfeng Guo, Yang Yu Jun 2020

Truck Scheduling For Delivering Containers Among Multiple Container Terminals Based On Truck Appointment System, Houming Fan, Zhenfeng Guo, Yang Yu

Journal of System Simulation

Abstract: Based on thetruck appointment system which is used for coping with the serious congestion in the port caused by trucks irregular arrival at peak time, the truck scheduling problem for delivering containers from outside yard to multiple container terminals is studied.Under the premise of meeting the requirements of container arrivals for export vessels, a truck scheduling model is built to reduce the outside yard's operation cost with the objective of minimizing the quantity of the dispatched trucks. A modified ant colony algorithm is designed to solve the model, and the truck scheduling plan for delivering containers to different terminals …

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Compressed Cooperative Eigenvalue Spectrum Sensing For Radio Signal, Jingjing Yang, Feng Yun, Zhigang Chen, Tang Hao, Huang Ming Jun 2020

Compressed Cooperative Eigenvalue Spectrum Sensing For Radio Signal, Jingjing Yang, Feng Yun, Zhigang Chen, Tang Hao, Huang Ming

Journal of System Simulation

Abstract: Detecting the abnormal radio emission through radio monitoring is an important task of radio management. A regional cooperative compressed spectrum sensing model is proposed. A multi-node sensing system based on software defined radio platform is built, and the effectiveness of cooperative spectrum sensing is demonstrated. Results show that a high detection probability could be achieved at a suitable decision threshold based on the test statistics extracted from the eigenvalue of the received signal; what's more, compressed spectrum sensing employed to the detection system greatly reduced the size of the data transmitted from the sensing nodes to the fusing node. …

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A Dynamic Routing Protocol Which Can Achieve Fast Convergence Of Meo/Leo Network, Chengsheng Pan, Weigeng Lai, Huaifeng Shi Jun 2020

A Dynamic Routing Protocol Which Can Achieve Fast Convergence Of Meo/Leo Network, Chengsheng Pan, Weigeng Lai, Huaifeng Shi

Journal of System Simulation

Abstract: In view of the routing convergence slow problem caused by the large delay and the topological structure high dynamic performance of the satellite network, a dynamic routing protocol which can achieve fast convergence of MEO/LEO double-layer satellite network routing is put forward. The protocol based on the combination of Virtual Topology Routing Strategy and link state routing protocol introduces the idea of network clustering. In the process of satellite network routing convergence, the whole network is divided into cluster management, and a covering clustering algorithm for MEO/LEO double layered satellite networks is proposed, which reduces …

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