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Transient Analysis Of Metro Vehicle Auxiliary Inverter During Pantograph And Catenary Off-Line, Xiaobo Li, Wu Hao, Jiechen Xu 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, Yanjun Xiao, Liu Rui, Haiping Song, Jing Ran, Lihu He 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 …


Insulation Optimization Of High Voltage Box Based On Finite Element Method, Fangcheng Lü, Jianqiao Ma, Hongyu Liu, Fochi Wang, Xie Jun, Buchao Jia, Yunxiang Guo, Li Min 2020 1. Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense (North China Electric Power University), Baoding 071003, China; ;

Insulation Optimization Of High Voltage Box Based On Finite Element Method, Fangcheng Lü, Jianqiao Ma, Hongyu Liu, Fochi Wang, Xie Jun, Buchao Jia, Yunxiang Guo, Li Min

Journal of System Simulation

Abstract: The discharge between cable connector and box walls directly affects the operational reliability of CRH. Optimized design of the electric field distribution of the connector can improve stability of CRH. The sheath installation position, sheath structure and thickness of the insulation layer were analyzed to see its influence on the distribution of field intensity. The simulation results show that insulating jacket positioned at the high voltage end of cable connector can effectively improve the electric field distribution, insulation sheath should appress to the high voltage fitting end of the cable connector and also extend to the root of first …


Application Of Fuzzy Pid Control Based On Neutral Network On High/Low Temperature Environmental Simulation System, Jingwang Jiang, Yunjie Wu, Mengchen Wu 2020 1. State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China; ;2. School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China; ;3. Science and Technology on Aircraft Control Laboratory, Beijing 100191, China; ;

Application Of Fuzzy Pid Control Based On Neutral Network On High/Low Temperature Environmental Simulation System, Jingwang Jiang, Yunjie Wu, Mengchen Wu

Journal of System Simulation

Abstract: High/Low Temperature Environmental Simulation System is mainly used for the functional deploying test of the giant space deployable antenna and some large-scale structures at extreme high/low temperatures, and some other relevant tests. This project requests controlling the parameters of the system in a large range with high accuracy and no overshoot. Temperature control system has features of non-linearity, time-variant, and large delay, which seriously affect the speed and accuracy of the control. However, the conventional PID finds it difficult to achieve desired effect of control. A new scheme of compound control which is referred to as fuzzy-PID control based …


Study On Simulation Modeling Of Dynamics For Landing Gear Of Helicopter With Deck-Landing, Zhang Liao, Guan Wei, Wang Gang, Li Wei, Pan Long 2020 Army 93199 of PLA, Harbin 150001, China;

Study On Simulation Modeling Of Dynamics For Landing Gear Of Helicopter With Deck-Landing, Zhang Liao, Guan Wei, Wang Gang, Li Wei, Pan Long

Journal of System Simulation

Abstract: A simulation mathematics model was advanced which introduced the motion data of the deck at wheels/ground contact point into the dynamics model of the landing gear as follows: the space position and the level vector were obtained by computing the space position and pose of helicopter. The altitude and the level vector of the deck at wheels/ground contact point were obtained by computing the ship movement and the space position of helicopter's wheels. The ground reaction force was solved by that regard negative of relative altitude between the tire and the deck at wheels/ground contact point as the compression …


Collaborative Simulation Between Remote Laboratories Based On Fiber-Optic Reflective Memory, Chijun Tian, Shengbing Shen, Yanlei Li, Xianzong Wang, Zhuofeng Guo 2020 1. Tianjin Delegate Station of Navy Armaments Department, Beijing 100073, China; ;

Collaborative Simulation Between Remote Laboratories Based On Fiber-Optic Reflective Memory, Chijun Tian, Shengbing Shen, Yanlei Li, Xianzong Wang, Zhuofeng Guo

Journal of System Simulation

Abstract: Taking advantage of independently developed HY-FB2125G Fiber-Optic Reflective Memory network interface and HY-FHX8 fiber-optic hub, the fiber-Optic Reflective Memory network was built and high speed data contribution was realized. With the elaborate design of hub-centered network architecture, simulation laboratories have the ability to process collaborative experiment and reuse test resources, which provides powerful support to accomplish collaborative simulation experiments.


Application Of Flowsim For Traffic Management And Assessment In Shenzhen, Yuhan Jia, Jianping Wu, Yiman Du, Geqi Qi 2020 Department of civil engineering, Tsinghua University, Beijing 100084, China;

Application Of Flowsim For Traffic Management And Assessment In Shenzhen, Yuhan Jia, Jianping Wu, Yiman Du, Geqi Qi

Journal of System Simulation

Abstract: Recently many traffic problems are faced by more and more cities. Since traditional method can no longer solve the above problems, and Transportation Demand Management (TDM) solutions are in desperate need. Also, as a successful application of Intelligent Traffic System (ITS), traffic simulation software has become an efficient way to carry out assessment for TDM. The implementation of congestion charge policy in Shenzhen was studied as a demonstration of TDM in China. Then the microscopic traffic simulation software, FLOWSIM, was introduced to simulate the traffic situation to do assessment of congestion charge. Based on the results, advices …


Knowledge Engineering In Simulation Of Parallel Military System, Xiaogang Qiu, Zhang Peng 2020 College of Information System and Management, National University of Defense Technology, Changsha 410073, China;

Knowledge Engineering In Simulation Of Parallel Military System, Xiaogang Qiu, Zhang Peng

Journal of System Simulation

Abstract: Military model is the integration and representation of military knowledge. The main task of military simulation is either to verify the exist knowledge or to produce new knowledge about military activities. By computational experiment, it is able to gain new knowledge about the parallel military system, which is able to enrich the origin knowledge system. Combined with parallel system technology, it's possible to study the evolution process of military knowledge, which is able to help us understand the complexity of military system. From the perspective of knowledge engineering, the processes of knowledge integration, representation and evolution were studied, and …


Research On Dynamic Characteristics Of Hypersonic Vehicle Based On Large Scale Parallel Simulation, Hongyong Chen, Xuanhua Fan, Keying Wang, Fang Ye, Shifu Xiao 2020 Institute of Systems Engineering, CAEP, Mianyang, Sichuan 621999, China;

Research On Dynamic Characteristics Of Hypersonic Vehicle Based On Large Scale Parallel Simulation, Hongyong Chen, Xuanhua Fan, Keying Wang, Fang Ye, Shifu Xiao

Journal of System Simulation

Abstract: Based on the three predominant algorithms (Implicitly Restarted Krylov-Schur Method and Jacobi-Davidson Method ) and The PANDA Framework, a large-scale parallel computing system for modal analysis was established. The finite element model of typical wave-rider hypersonic vehicle was established and its dynamic characteristics were investigated. The numerical analysis reaches scale of 14,000,000 Degree of Freedoms (DOFs), and the number of MPI Cores is 1024. What's more, the difference of first 100 orders natural frequencies between PANDA and well known commercial software ANSYS is less than 0.01%, and mode shapes are absolutely the same, the efficiency of 1024 cores is …


Design Of Unified Algorithm For Sampling Mpdu, Ti Zhou, Miao Yi, Yang Jian 2020 Beijing Aerospace Control Center, Beijing 100094, China;

Design Of Unified Algorithm For Sampling Mpdu, Ti Zhou, Miao Yi, Yang Jian

Journal of System Simulation

Abstract: The standard of CCSDS AOS is used in space exploration because of the process of the standard airspace system. The spacecraft missions have used multi-protocol data unit (MPDU) to multiplex the package channels. The range of MPDU and the data are different in different spacecrafts. This process brings some problems in the maintenance and the correctness of the algorithms of virtual channel multiplexing in simulation system. The applications of CCSDS in the world were researched, and the general definitions of MPDU in these missions were described. A circle memory was given to buffer the data of MPDU, two general …


Wiftcpn Formalized Decision-Making For Auv Formation System Under Uncertainty, Lili Hao, Gu Hao, Fengju Kang, Huizhen Yang 2020 1. Marine College, Northwestern Polytechnical University, Xi'an 710072, China; ;2. National Key Laboratory of Underwater Information Process and Control, Xi'an, 710072, China;

Wiftcpn Formalized Decision-Making For Auv Formation System Under Uncertainty, Lili Hao, Gu Hao, Fengju Kang, Huizhen Yang

Journal of System Simulation

Abstract: Usually the acquired target information is not sufficient and certain enough due to inaccurate measurements, inconsistent granularity and noise, which results in the AUV formation decision-making system having some characteristics, such as discrete, time delay, hierarchical, fuzzy, inconsistencies. Therefore, an integrated formal approach of modeling, simulation and verification based on weighted intuitionistic fuzzy timed colored petri net (WIFTCPN) was proposed. The mapping relationship between WIFTCPN and fuzzy time, time delay and intuition fuzzy inference rules were established. Furthermore, corresponding reasoning decision simulation model under uncertain information was built by using CPN Tools. The properties including liveness, home and fairness …


Human Action Recognition Based On Self-Learning Feature And Hmm, Jiarui Wen, Lina Liu, Rui Ling, Shiwei Ma 2020 Shanghai University, School of Mechatronic Engineering and Automation,Shanghai Key Laboratory of Power Station Automation, Shanghai 200072, China;

Human Action Recognition Based On Self-Learning Feature And Hmm, Jiarui Wen, Lina Liu, Rui Ling, Shiwei Ma

Journal of System Simulation

Abstract: The current methods of human action recognition by computer vision are mostly based on hand-craft features and usually prior knowledge-required. They inevitably depend on specific applications and neglect the inner structure of visional information. A novel method which integrated self-learned pose features and combined posture symbol rules was proposed to achieve the recognition of human action more efficiently. The structural features of posture silhouette were extracted and a codebook of primary posture was built through the establishment of a sparse auto-encoder network. Then, in the phase of recognition, the Hidden Markov Model was employed to train the models …


Group-Based Image Compositing In Heterogeneous Environments, Liu Ning, Dengming Zhu, Zhaoqi Wang, Wei Yi 2020 1. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China; ;2. University of Chinese Academy of Sciences, Beijing 100049, China;

Group-Based Image Compositing In Heterogeneous Environments, Liu Ning, Dengming Zhu, Zhaoqi Wang, Wei Yi

Journal of System Simulation

Abstract: Image compositing requires dense inter-node communications and could easily become the bottleneck of a parallel visualization system. Conventional image compositing algorithms assume the environment is homogeneous and take no heterogeneity into consideration. In a heterogeneous environment, this assumption is likely to cause unreasonable load distribution among the nodes. To address this problem, we present a group-based image compositing algorithm in heterogeneous environments. It is able to distribute the workloads among the nodes according to computing and networking characteristics of the heterogeneous environments. We conduct a comprehensive evaluation on the ns-3 network simulator. Experiment results shows that when the environment …


Combinatorial Optimization Of Resolution Level In Three-Dimensional Visualization, Yanyang Zeng, Zhenhai Yu, Weidong Liu 2020 1. College of Computer Science and Technology of Henan Polytechnic University, Jiaozuo 454000, China; ;

Combinatorial Optimization Of Resolution Level In Three-Dimensional Visualization, Yanyang Zeng, Zhenhai Yu, Weidong Liu

Journal of System Simulation

Abstract: In the process of developing three-dimensional visualization, it is necessary to select and adjust the combined solutions of the resolution hierarchy of multiple models. If only by artificial attempting will lead to the more times of iteration and lower design efficiency, therefore, a method, combinatorial optimization of models' resolution level, is proposed. Image information entropy is introduced for evaluating the image quality of the scene. According to the assessed value of visual effects and it is provided to the above method based on particle swarm optimization (PSO), the models with the resolution hierarchy can be matched and reorganized. Through …


Intelligent Combination Of Discrete Lod Model For 3d Visualization Based On Visual Perception And Information Entropy Fusion, Che Li, Fengju Kang 2020 1. Marine College, Northwestern Polytechnical University, Xi'an, 710072, China; ;2. National Key Laboratory of Underwater Information Process and Control, Xi'an, 710072, China;

Intelligent Combination Of Discrete Lod Model For 3d Visualization Based On Visual Perception And Information Entropy Fusion, Che Li, Fengju Kang

Journal of System Simulation

Abstract: With respect to the problem that single-index evaluation of visual quality in the process of intelligent combination of discrete Level-of-Detail (LoD) model for three-dimensional (3D) visualization can easily result in low reliability. Human visual perception and information entropy based multi-index fusion intelligent combination of discrete LoD model algorithm was proposed. Through analyzing the visual perception based image quality evaluation index, multi-index fusion evaluation intelligent combination of discrete LoD model framework was built. Comparative experiment with single index model combination bases on PSO method was designed. Model combination optimizing process utilized modified Particle Swarm Optimization (PSO) method which was strengthened …


3d Flight Simulation System Visualization And Study Of Google Earth, Junyu Wang, Bin Cheng, Chuan Wang, Ren Jian 2020 The Unit 95934 of PLA, Cangzhou 061736, China;

3d Flight Simulation System Visualization And Study Of Google Earth, Junyu Wang, Bin Cheng, Chuan Wang, Ren Jian

Journal of System Simulation

Abstract: Through the secondary development of Google Earth, flight training simulation system for visualization of realization, the system used B/S structure, the client browser using Google Earth, all the development on the server side. Mathematical model of aircraft was constructed; 3D modeling software SketchUp was used to establish a realistic fighter jets, missiles, high and low speed flame and other 3D model; the established 3D models was imported into Google Earth; by Microsoft VC ++ 6.0, the secondary development on Digital Earth was achieved, and the control of aircraft and other 3D models was realized; Matlab was used to verify …


Track Planning For Unmanned Aerial Vehicles Based On Wolf Pack Algorithm, Yonglan Liu, Weimin Li, Husheng Wu, Wenjing Song 2020 1. Air Force Engineering University, Xi'an 710051, China; ;

Track Planning For Unmanned Aerial Vehicles Based On Wolf Pack Algorithm, Yonglan Liu, Weimin Li, Husheng Wu, Wenjing Song

Journal of System Simulation

Abstract: Along with the diversification of missions that unmanned aerial vehicles (UAV) can carry out, track planning becomes basic precondition of UAV fulfilling missions successfully. Aiming to these, a method of track planning based on Wolf Pack Algorithm (WPA) was proposed. The method of equivalent terrain simulation was used to make enemy's threatens and terrain obstacles equal to peaks, thus the scene of track planning of UAV was built. Based on the scene, the WPA that extracted three intelligent behaviors including scouting, summoning and beleaguering was adopted to plan the track of UAV, whose start point and end point had …


Research On Online Interaction Simulation Method Of Uav Flight Control System, Zhang Qing, Ran Jian, Yujun Hou 2020 Beijing Electromechanical Engineering Institute,Beijing 100074;

Research On Online Interaction Simulation Method Of Uav Flight Control System, Zhang Qing, Ran Jian, Yujun Hou

Journal of System Simulation

Abstract: UAV is widely applied to a variety of areas, for the huge advantages of remote controlling flight trajectory, iterant recovery and flexible mission payloads flight. The routine design methods for aerocraft control system cannot supply desire of UAV high accuracy flying and replying diversified compositive disturb. System composition and departmental function of UAV flight control system were introduced. An online interaction simulation method of UAV flight control system was advanced. The principle and principle of online interaction simulation were analyzed. The key techniques of constituting fiducial simulation model, real time updating and revising simulation model, on-line detecting a mass …


Study On Optimization Of Loading Plan In Car Carrier Of Vehicle Logistics Transportation, Qin Liang, Zhicheng Wang, Meng Lei, Deru Deng, Zhiyun Zou, Xijie Gai, Yuqing Guo, Wenqiang Feng 2020 Research Institute of Chemical Defence,Beijing 102205,China;

Study On Optimization Of Loading Plan In Car Carrier Of Vehicle Logistics Transportation, Qin Liang, Zhicheng Wang, Meng Lei, Deru Deng, Zhiyun Zou, Xijie Gai, Yuqing Guo, Wenqiang Feng

Journal of System Simulation

Abstract: The car carrier load transportation allocation problem is a typical problem in vehicle logistics. In order to improve the efficiency of transport and reduce the cost, this problem was studied by adopted hypothetical data and requirements. All the load combinations whose utilization factor of the length of sweeping board is more than 95% established a matrix. Then the dynamic programming obtained the number of car carrier to the corresponding loading plan. By using the exhaustion method, through computer simulation, loading plan of each layer of car carrier was randomly produced, strictly meeting the loading requirements of each car at …


Simulation And Application Of Dkipso-Svc Combined Model For Credit Risk Assessment, Zhenhai Wan, Tieying Liu, Zhang Yang, Jishuang Li 2020 College of Computer Science, Inner Mongolia University, Hohhot 010021, China;

Simulation And Application Of Dkipso-Svc Combined Model For Credit Risk Assessment, Zhenhai Wan, Tieying Liu, Zhang Yang, Jishuang Li

Journal of System Simulation

Abstract: In order to improve the problem of inefficient parameter selection of the GDS-SVC model and DIPSO-SVC model, and utilize the generalization ability and robustness of support vector classification (SVC), the reduction factor of location updating was introduced based on the dynamic improvement Particle Swarm Optimization (DIPSO), and then the DKIPSO-SVC of parameters selecting in SVC was established based on DKIPSO. The method was applied to credit scoring of commercial banks. The simulation results demonstrate that the robustness of the DKIPSO-SVC model is better than DIPSO-SVC. But beyond that, the accuracy of DKIPSO-SVC model achieves 96.6049%, higher than that of …


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