Communication Model Modeling Method In Warfare Modeling And Simulation,
2020
1. The 103rd Department, The Second Artillery Engineering University, Xi’an 710025, China; ;
Communication Model Modeling Method In Warfare Modeling And Simulation, Yuanfeng Li, Jianping Liu, Chengying Shi
Journal of System Simulation
Abstract: The limitation of the traditional communication model modeling methods was analyzed. On the basis of detailed analysis the requirements of communication modeling and simulation, the method of communication model modeling method was designed based on the communication effects. It shows how to represent communication asset and combines the input and output of the model with the simulation verification scenario to illustrate the validity and applicability of the communication model. This method can effectively solve the impact analysis of communication problem for operational effectiveness, saves development costs and supplies the reference method of C4ISR model in warfare modeling …
3-Dimensional Kinematics Simulation Of Gear Hobbing,
2020
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;
3-Dimensional Kinematics Simulation Of Gear Hobbing, Rongchuang Zhang, Wang Jun, Wang Bo, Wanshan Wang
Journal of System Simulation
Abstract: To save inevitable modeling insufficiencies owing to the simplified modeling strategie, 3-dimensional kinematics simulation of gear hobbing based on solid modeling was developed. On the basis of the kinematic relationship and positional relationships between the hob cutter and work piece, the vector model of the gear hobbing motion based time-driven was put forward. Based on UG Secondary Development, geometrical model of hob tooth rake face and curvilinear model of hob tooth path were developed, and the swept geometric entity of the hob tooth was developed through the use of the combination of these two models. The intersection of …
Dynamic Simulation Of Single Abrasive Grain Cutting Tc4 Based On Sph Method,
2020
1. School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; ;
Dynamic Simulation Of Single Abrasive Grain Cutting Tc4 Based On Sph Method, Wang Yan, Wang Shuai, Jianguo Liu, Xiong Wei
Journal of System Simulation
Abstract: Considering the negative effects of mesh distortion on calculation accuracy in FEM simulation, a novel mesh free method named Smoothed Particle Hydrodynamics (SPH) method was employed to simulate the process of single CBN abrasive grain cutting TC4. Establishing a SPH model of TC4 workpiece and a FEM model of single abrasive grain with cutting edges similar to the real abrasive grain, the influences of cutting depth on grinding forces and chip formative process were studied systematically. The simulation results state that grinding forces enlarge with the increase of cutting depth, while grinding force ratio decreases. And TC4 chip formative …
Radar Countermeasures Simulation Factor Analysis Method Of Fidelity-Oriented,
2020
Luoyang Electronic Equipment Test Center of China, Luoyang 471003, China;
Radar Countermeasures Simulation Factor Analysis Method Of Fidelity-Oriented, Guoliang Wang, Huanyao Dai, Xujian Shen, Zhou Bo
Journal of System Simulation
Abstract: It is crucial to assess the fidelity of operational objectives simulation and complex electromagnetic environment building for designing a military simulation system. Traditional confidence, credibility, similarity are difficult to fully evaluate the entire system, and hard to focus. To solve the problem of fidelity analysis and evaluation of operational objectives and battlefield simulation environment building, the concept and content of simulation fidelity were analyzed to explore the factor analysis principle and hierarchical classification method, etc., taking radar group network confrontation as an example, and its level division structure was given. General principles and methods of radar countermeasure high-fidelity simulation …
Model Granularity Control Oriented Multi-Resolution Modeling,
2020
1. National CIMS Engineering Research Center, Tsinghua University, Beijing 100084, China; ;
Model Granularity Control Oriented Multi-Resolution Modeling, Huachao Mao, Gongzhuang Peng, Heming Zhang, Jiaxin Zhao, Minghui Li
Journal of System Simulation
Abstract: Multi-resolution modeling and simulation has been widely applied in various fields, but the current multi-resolution modeling and simulation methods cannot effectively, systematically and comprehensively address four key issues: resolution control, model consistency, information loss and cross resolution interaction. Addressing these four issues, Model Granularity Control Oriented Multi-Resolution Modeling was proposed. This modeling approach has two core modeling components: resolution state chart and resolution connecting bridge, the former is to use UML state diagram to control granularity changes triggered by cross-resolution interaction, human-computer interaction and resource optimization model, and the latter is to model the relationship between different resolution …
Motion Planning Algorithm Based On Overall Trajectory For Locomotion Of 6-Legged Robot,
2020
School of Aeronautics, Beihang University, Beijing 100191, China;
Motion Planning Algorithm Based On Overall Trajectory For Locomotion Of 6-Legged Robot, Zuhua Guo, Shenjiang Wang, Shijie Zhao
Journal of System Simulation
Abstract: A traditional motion planning method based on gaits is difficult to adopt to complicate nature terrain. In order to solve the problem, a planning algorithm based on overall trajectory was proposed. The basic unit of robot maneuver was a walking step. The proposed method was to estimate position of robot in the next moment along a given overall trajectory, and then to plan the joints’ trajectory of robot. In this algorithm, the motion of a single step was decomposed into two parts, the motion of moving robot body with support of legs and the motion of swinging legs forward, …
Spherical Qtm-Based Submerged Simulation System Of Sea Level Rise,
2020
1. College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; ;
Spherical Qtm-Based Submerged Simulation System Of Sea Level Rise, Huaqiao Xing, Miaole Hou, Wang Lei, Xiaoyi Jiang
Journal of System Simulation
Abstract: Focused on the dynamic simulation of submerged area after the rise of sea level, key technical issues were discussed, such as data organization and scheduling in large-scale 3D scene, submerged area dynamic simulation based on the adjacent relations of QTM (Quaternary Triangular Mesh) grids. A submerged simulation system based on QTM was designed and developed using Visual C#3.0 programing language and Microsoft DirectX 9 graphic interface, and the overall structure and main function of the system were introduced in detail. Tianjin Binhai New Area was selected as study area for submerged area dynamic simulation under different sea levels …
Study Of Setting Up Simulation Platform Of Self-Adaptive Flight Control System With Self-Repair Function,
2020
1. College of Automation, Beijing Union University, Beijing 100101, China; ;
Study Of Setting Up Simulation Platform Of Self-Adaptive Flight Control System With Self-Repair Function, Long Hao, Shujie Song
Journal of System Simulation
Abstract: The frame and characteristic of self-adaptive flight control system with self-repair function for aircraft with thrust vector were studied. RHO optimal algorithm was used to realize online controller design. MSLS algorithm was used to realize online flight identify parameters. Global parity space method, sensor data fusion and probability theory were used to realize FDI algorithm. The simulation platform used to simulate self-repair function with aircraft control surface failure was developed using OOP language VC++6.0 and three-dimensional graphics language OpenGL. Simulations show that the control surface and flight aerodynamic parameter change with flying states in the flight movement …
Uav Takeoff Decision Based On Neural Network Model Of Takeoff Capability,
2020
1. Key Laboratory of National Defense for Flight Control Integration, Research Institute of Xi’an Flight Automatic Control, Xi’an 710065, China; ;
Uav Takeoff Decision Based On Neural Network Model Of Takeoff Capability, Yongtao Peng, Yueping Wang, Xiaoting Wang
Journal of System Simulation
Abstract: To enhance the safety in case of engine flameout failure, a new type of UAV takeoff decision based on neural network capacity model was proposed. Two capacity parameters of takeoff safety in case of engine flameout failure were defined, one is the maximum velocity for a safe takeoff and the other is the minimum velocity for a safe shut down. A calculation method based on iterative simulations for those parameters under multiple flight conditions was introduced. Double layer neural networks were used to model the relationship between flight conditions and the capacity parameters, to realize the compressive storage and …
Transient Analysis Of Metro Vehicle Auxiliary Inverter During Pantograph And Catenary Off-Line,
2020
1. College of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China; ;
Transient Analysis Of Metro Vehicle Auxiliary Inverter During Pantograph And Catenary Off-Line, Xiaobo Li, Wu Hao, Jiechen Xu
Journal of System Simulation
Abstract: Pantograph and catenary off-line brings great harm to the safe and reliable operation of subway vehicles. The equivalent process during off-line and the off-line equivalent circuit of subway vehicles was proposed. Taking a metro vehicles powered auxiliary inverter system as an example, the off-line transient analysis was carried out, and a simulation test was conducted. As shown in the results, the useful signal during off-line greatly reduced in vehicle system and the harmonics of Insulated Gate Bipolar Transistor (IGBT) voltage was greatly increased. The questions about heat-resistant and insulation arose, which caused the inverter module to damage and greatly …
Simulation And Test Of Mold Transport Mechanism Of Multi Mold Cycle Production Line,
2020
Hebei University of Technology, Tianjin 300130, China;
Simulation And Test Of Mold Transport Mechanism Of Multi Mold Cycle Production Line, Yanjun Xiao, Liu Rui, Haiping Song, Jing Ran, Lihu He
Journal of System Simulation
Abstract: A new mold transport mechanism was put forward. In order to verify its strength and stability, a three-dimensional model of the institution was established making structural static analysis. The model was simplified according to the results of static analysis and the critical load of the mould delivery mechanism was calculated. Then the buckling analysis of the simplified model and the original model was conducted. According to the simulation analysis of the total deformation nephogram, the stress nephogram, critical load and buckling mode, the strength and stability of the mold transport mechanism were verified. The stress concentration area and the …
Modeling Method Of Airborne Display And Control System Based On Meta-Model Features,
2020
Naval Aeronautical Engineering Institute Qingdao Branch, Qingdao 266041, China;
Modeling Method Of Airborne Display And Control System Based On Meta-Model Features, Zhile Wang, Jungan Wei, Yu Hui
Journal of System Simulation
Abstract: Analysed of the current integrated avionics display and control system simulation problems, discussed the system’s function, composition and the simulation design method detailedly. Proposed a reconfigurable modeling method of meta-model features according to the requirements of the simulator develop. Make full used of the feature extraction method meta-model theory, the various elements that make up the system and their relationship was classified and feature abstract and description reasonably, built the meta-model of display and control system. Created the display and control system’s graphic elements, characters and Human-computer interactive interface by GL Studio. Using object-oriented techniques to make reusable class …
Simulation Modeling And Analysis Of Strong Wind-Shear Detected By Airborne Radar In X-Band,
2020
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST, Nanjing 210044, China; ;3. Sichuan Meteorological Bureau, Chengdu 610072, China;
Simulation Modeling And Analysis Of Strong Wind-Shear Detected By Airborne Radar In X-Band, Wang Lei, Wei Ming, Yang Tao, Liu Ping
Journal of System Simulation
Abstract: The fluid mechanics principle and the triangle harmonic function were used to establish a simple and high real-time typical strong wind-shear field model. The simulation data of wind field velocity in horizontal fan-shaped scanning mode and vertical scanning mode based on the parameter and detecting mode of airborne phase array weather radar was proposed. The different characteristics of strong wind shear detected by airborne weather radar on the different altitude were proposed through simulation data analysis. The simulation data credibility of strong wind shear field was analized based on weather radar velocity of a strong squall line process …
Comparison Of Microscopic On-Road Fuel Consumption Model Based On Vsp And Ln (Tad),
2020
1. MOE Key Laboratory for Urban Transportation Complex System Theory and Technology, Beijing Jiaotong University, Beijing 100044, China; ;
Comparison Of Microscopic On-Road Fuel Consumption Model Based On Vsp And Ln (Tad), Zhao Qi, Yu Lei, Guohua Song
Journal of System Simulation
Abstract: In microscopic on-road fuel consumption models, the power demand-based parameter was commonly used to characterize the vehicle activities because of its strong correlation with fuel consumption. Both VSP and the natural logarithm of Ln(TAD) were commonly used power demand-based parameters. It is necessary to compare the accuracy and characteristic of two fuel consumption models that are developed based on the VSP with Ln(TAD). By collecting and processing field vehicle activities and fuel consumption data, two fuel consumption models for LDVs, one based on the VSP and another one based on Ln(TAD) were developed. Then, the distribution model between …
Formation Cooperation Of Computer Generated Forces Organization,
2020
Warfighting Experimentation Center, Armored force Institute, Bengbu 233050, China;
Formation Cooperation Of Computer Generated Forces Organization, Shaobin Sun, Shinan Zhang, Dong Bo
Journal of System Simulation
Abstract: Cooperation is the base of Computer Generated Forces team behaviors; formation and formation changing are the mostly used team cooperation of tank unit CGF. By combining cooperation planning with joint intention, a formation cooperation method for tank unit CGF was promoted. According to the knowledge levels of different CGF roles about the cooperation, the commander role CGF planed conditions and restraints of the formation cooperation, and the subordinated CGF autonomy planed to concretely implement the cooperation, which significantly enhanced the formation cooperation efficiency. The joint intention was established before the implementation of the cooperation, all CGF revised cooperation action …
Modeling And Simulation On Railway Bulk Oil Transit Operations,
2020
1. Dept. of Logistics Information & Logistics Engineering LEU, Chongqing 401311, China; ;
Modeling And Simulation On Railway Bulk Oil Transit Operations, Jingheng Ma, Xingchang Liu, Youhong Fan, Kang Jin
Journal of System Simulation
Abstract: The railway bulk oil transit operation is a hybrid (discrete/continuous) system because of the main body of the continuous flow oil and a variety of discrete events. According to the system’s characteristics of complex process, great difficulty, high risk, the oil transit operation model was established based on discrete rate simulation and system’s continuity, predict events, emergencies were analyzed. The model was converted into linear programming, the effective rate was calculated under constraints, and the operation process and event scheduling was simulated. It was verified that the model is feasible. By obtaining the dynamic behavior and real-time data, its …
Research On Network Emulation Method Based On Shared Library Integration,
2020
1. Institute of Cryptographic Engineering, Information Engineering University, Zhengzhou 450000, China; ;
Research On Network Emulation Method Based On Shared Library Integration, Mingqing Zhang, Leigang Sun, Hongshan Kong, Xianqing Qi
Journal of System Simulation
Abstract: For the high-risk, high-cost to test equipments in real network and the poor accuracy of software simulation, network emulation method was introduced; the integration between real application and simulation system is the key technology. According to the mapping principle between real device and virtual network, a network emulation model framework was proposed; the OMNeT++ simulator on the source code lever was designed; the network emulation method based on shared library integration was proposed; the problems of thread error, time distortion and symbolic space in the process of integration were discussed, and corresponding solutions were given; the correctness …
Identification And Visual Analysis Of Structure Characteristics Of Severe Storm,
2020
1. Department of Computer Science, Hangzhou Dianzi University, Hangzhou 310018, China; ;
Identification And Visual Analysis Of Structure Characteristics Of Severe Storm, Jiayi Xu, Xuanxuan Huang
Journal of System Simulation
Abstract: A technique of adaptively extracting the feature regions from radar storm data was proposed based on the meteorological radar theory and historical statistics. A logical analysis strategy was proposed to identify convective cores, searched full convective regions to extract isolated storm cells. The changing of reflectivity data and corresponding gradient were analyzed to classify four typical structures. In order to accurately show the extracted spatial structures of storm cell, a parallel rendering framework was constructed by improving the ray-casting algorithm. Experiment results show that the proposed technique can quickly and accurately identify and visualize the spatial structure of sever …
Improved Support Vector Pre-Extracting Algorithm In Speech Recognition Application,
2020
1. College of Information Management, Shanxi University of Finance & Economics, Taiyuan 030006, China; ;
Improved Support Vector Pre-Extracting Algorithm In Speech Recognition Application, Hao Rui, Yanbo Niu, Xiu Lei
Journal of System Simulation
Abstract: Support vector machine (SVM) training is difficult for large-scale data set of speech recognition. A new SVM pre-extracting algorithm was proposed. On the one hand, kernel Fuzzy C-Means clustering was separately performed on each class of original data set. All the cluster centers were as a representative set of each class. On the other hand, according to the geometric distribution of support vectors and combined with the classification strategy of one-versus-one for SVM multi-class classification algorithm, boundary samples were extracted as support vectors for SVM to training and prediction. The algorithm was applied to embedded speech recognition system. Experiments …
Trusted Scheme For Defending On-Off Attack Based On Beta Distribution,
2020
1. Key Laboratory of Wireless Sensor Network & Communication, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200051, China; ;2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 201899, China; ;
Trusted Scheme For Defending On-Off Attack Based On Beta Distribution, Weidong Fang, Zhidong Shi, Lianhai Shan, Fengrong Li, Xiuzhi Wang
Journal of System Simulation
Abstract: Using encryption and authentication mechanisms can only prevent external attacks, but these mechanisms for internal attacks are invalid in Wireless Sensor Networks (WSNs). On-off attack also belongs to internal attacks, which has more concealment and aggressive, due to its reputation value dynamic changing. By using difference value and trend analysis based on BETA distribution, an effective trust mechanism was proposed to defend On-off attack. Simulation shows that this scheme can defend On-off attack, and be easy to implement.
