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Articles 1 - 22 of 22
Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
Military Metaverse: Key Technologies, Potential Applications And Future Directions, Zhao Zhang, Yujie Guo, Xiaoning Zhao, Baoliang Sun
Military Metaverse: Key Technologies, Potential Applications And Future Directions, Zhao Zhang, Yujie Guo, Xiaoning Zhao, Baoliang Sun
Journal of System Simulation
Abstract: Since its emergence, the concept of metaverse has been applied to many fields. At present, the transformation of military intelligence, digitalization and information technology is advancing in an allround way. The military enabled by metaverse technology will accelerate the process of military reform in the new era. To explore the potential application of metaverse in the military field, this paper first introduces several key technologies of metaverse and their functions in the military field, and then discusses some potential directions for the application of metaverse in weapon development and support, training and teaching of officers and soldiers, tactical command …
Research On Simulation And Optimization Of Maintenance Support Mode And Human Resources Auocation For Complex Equipment, Junhai Cao, Yiming Guo, Chuang Zhang, Qingyi Guo
Research On Simulation And Optimization Of Maintenance Support Mode And Human Resources Auocation For Complex Equipment, Junhai Cao, Yiming Guo, Chuang Zhang, Qingyi Guo
Journal of System Simulation
Abstract: Aiming at the single maintenance support mode of the army’s complex equipment and the strong randomness of human resource allocation, the military-level equipment maintenance process is taken as the research object, the complex equipment maintenance plan, maintenance support mode, human resource configuration, and maintenance process flow are analyzed. The simulation model of a complex equipment maintenance workshop is constructed, the influence of maintenance plans, maintenance support modes, and human resource allocation on indicators of “maintenance support time” and “human resource satisfaction rate” is explored, the internal laws is analyzed and the manpower optimal allocation for the maintenance of …
Modeling And Simulation Of Electric Vehicle Industry Development Based On System Dynamics, Yueqiang Fu, Tiantian Xia
Modeling And Simulation Of Electric Vehicle Industry Development Based On System Dynamics, Yueqiang Fu, Tiantian Xia
Journal of System Simulation
Abstract: New energy electric vehicle are the main trend of automobile industry upgrading. It plays an important role in ensuring the energy security and improving the ecological environment. It is of theoretical and practical significance to carry out research on the development of new energy electric vehicles. The affecting factors are systematically analyzed, the causal relationship model and stock flow model are established, and the dynamic equation of the model are determined and the parameter assignments are made. The model is verified and the system simulation and analysis are performed. The development trend and main influencing factors of …
Research On Simplified Approach Of Multi-Physics Coupling Simulation, Xuegong Sun, Liu Jing
Research On Simplified Approach Of Multi-Physics Coupling Simulation, Xuegong Sun, Liu Jing
Journal of System Simulation
Abstract: Multi- physics coupling simulation of aircraft is a highly coupled and advanced nonlinear process. Traditionally, the data of professional model was collected through engineering algorithm, experience. The over- simplfied approach reduced the accuracy of the simulation result. Therefore, a simplified but effective approach according to the characteristics of each multi-physics coupling model needed to be found. Through multi- physics coupling simulation research which focused on the main contradictions and engineering requirements, ignores minor contradictions, depending on characteristics of the various couplings and application requirements, the simplified approach and conclusions were put forward and verified by examples.
Research On Simulation Of Manufacturing Grid Resource Allocation Based On Scale Free Network, Xiangbin Zhang, Yanyan Li
Research On Simulation Of Manufacturing Grid Resource Allocation Based On Scale Free Network, Xiangbin Zhang, Yanyan Li
Journal of System Simulation
Abstract: In order to study the variation of resource allocation efficiency in manufacturing grid, the manufacturing grid resource allocation network model was established based on scale free network theory taking the manufacturing resource characteristics such as distribution and diversity into account. By calculation of the statistical indicators of complex networks and attribute functions, the appropriate resource allocation scheme was selected to realize global optimal resources allocation. Using this model and evaluation index of resource allocation, the variation rule was figured out that explained how resource allocation efficiency varied with structural evolution of manufacturing grid through analyzing the data from simulation …
Research On Parallel Simulation Of Hypersonic Vehicles, Xuegong Sun, Chunye Gong
Research On Parallel Simulation Of Hypersonic Vehicles, Xuegong Sun, Chunye Gong
Journal of System Simulation
Abstract: The system simulation of hypersonic vehicles was a multi-physics coupling process. It needed many iterations with large scale data to finish the simulation. To fix up the computational challenges, the distributed simulation was developed. But distributed simulation had no obvious effect on the computational efficiency. In order to enhance the computational efficiency, the grid parallel method and model parallel algorithm were studied based on the high performance cluster system. The parallel simulation method for fluid dynamics, data exchange method for partition boundary and load balance technology for parallel computing were developed and applied to the system simulation of hypersonic …
Simulation Study Of Soft Switching Technology For Quasi-Z-Source Boost Converter, Kun Xia, Yanneng Zeng, Ge Yue, Xiaodi Li
Simulation Study Of Soft Switching Technology For Quasi-Z-Source Boost Converter, Kun Xia, Yanneng Zeng, Ge Yue, Xiaodi Li
Journal of System Simulation
Abstract: With the same input voltage and duty cycle, quasi-Z-source boost converter can provide higher output voltage than traditional boost converter. It has the advantages of high efficiency, wide range of practical output voltage. A quasi-Z-source boost converter topology with soft switching technology was proposed. Using assist switch replaced the diode of original topology, which could accomplish the zero voltage switching on state of the main switch. The MATLAB/Simulink simulation results show that the new topology can reduce the switch stress of main switch and increase the system stability, also it can prolong the life time of switching devices.
Visual Positioning Technology Research Of Picking Robot Based On Dynamic Target, Juntao Xiong, Xiangjun Zou, Haixin Zou, Hongxing Peng, Ye Min
Visual Positioning Technology Research Of Picking Robot Based On Dynamic Target, Juntao Xiong, Xiangjun Zou, Haixin Zou, Hongxing Peng, Ye Min
Journal of System Simulation
Abstract: A difficult problem of picking robot visual position in the natural environment is the disturbance because of interference factors. The angular size of disturbed fruit was calculated to determine the three states of fruit that static, micro disturbance and large disturbance; For static and micro disturbance litchi, the improved FCM fuzzy clustering method was used to segment litchi image to acquire litchi fruit and fruit stalk, then the Hough linear fitting was used to determine the effective picking area and picking point on the fruit stalk, so realizing the visual space positioning of litchi picking point, and the simulation …
Research And Design Of All-Purpose Simulation Platform Of Fault Injection, Wenbin Yao, Zhao Ling, Wang Zhen, Yao Xiang
Research And Design Of All-Purpose Simulation Platform Of Fault Injection, Wenbin Yao, Zhao Ling, Wang Zhen, Yao Xiang
Journal of System Simulation
Abstract: Focusing on the limited injection position and single target system problems existing in the simulation research of fault injection, combined with the NS2 simulation technology and fault injection method, an all-purpose simulation platform of fault injection was proposed. The layered model of the targeted information system was constructed, whose topology information and service performance information was given by the matrix, and improved the generality of the simulation platform of fault injection. Based on the configuration information, the platform constructed the fault library, which brought the cost reduction and reliability promotion of the system faults. The quadruple design of the …
Self Formation Development Mode With Vopes, Changming Fu, Chunsheng Long, Tang Hong
Self Formation Development Mode With Vopes, Changming Fu, Chunsheng Long, Tang Hong
Journal of System Simulation
Abstract: To solve the growing conflict between requirements and applications in simulation/visualization, self-formation development mode was proposed: domain experts DIY by WYSWYG in a self-adapting process. VOPES (Visual Open platform for Engineering System) was briefly introduced: integrated architecture, system modeling tools, visualization tools, automatic generation, debugging, deploying, and runtime infrastructure. VOPES enables domain expert to produce distributed simulation/visualization application, no need of coding, complex program skill, hard rules like UML, HLA, DDS, etc. VOPES can be widely used in applications like mission simulation, equipment demonstration, virtual range, training, ITEM. It is especially suitable to the fast, agile, complex simulation/visualization application, …
Performance Analysis Of Netted Radar Data Fusion Systems, Zhijie Chen, Bin Rao, Yongzhen Li, Zhiwei Zong
Performance Analysis Of Netted Radar Data Fusion Systems, Zhijie Chen, Bin Rao, Yongzhen Li, Zhiwei Zong
Journal of System Simulation
Abstract: The performance analysis of netted radar data fusion systems was proposed. The principles of two representative radar netting modes (i.e., centralized fusion and distributed fusion) were introduced and the associated capabilities of anti-jamming, anti-stealth, fusion accuracy, fusion discrimination, and communication requirements were quantitatively analyzed. Simulation results indicate that the netting essence is, centralized fusion by using ‘or' rule to complement information and realize trajectory composition whereas distributed fusion by using ‘and' rule to reduce information redundancy and realize discrimination ability. The research can provide some enlightenment for the newly-developed intellective netted radar data fusion systems.
Multiple Disasters Evacuation Perceptual Model Based On Agent Technology, Xuefeng Zhang, Chengjun Zhang, Chenxi Bai, Taiping Jiang, Yuezhong Chu
Multiple Disasters Evacuation Perceptual Model Based On Agent Technology, Xuefeng Zhang, Chengjun Zhang, Chenxi Bai, Taiping Jiang, Yuezhong Chu
Journal of System Simulation
Abstract: Various disasters or accidents often reoccur in the process of evacuation. In order to solve the problem of evacuation in multiple disasters, a perceptual model for evacuation was proposed based on multi-agent technology. By guiding the decision and action of people with mathematical model of disaster and individual perception model, the crowd evacuation stimulation was combined with environment disaster model. It stimulated the perceptive functions such as visual sense, sense of smell, and auditory sense with ray method, gas molecular diffusion formula, and the theory of sound transmission. It analyzed the information of people through stress reaction model and …
Simulation Realization Of Netted Radar Data Fusion Systems, Zhijie Chen, Bin Rao, Yongzhen Li, Zhiwei Zong
Simulation Realization Of Netted Radar Data Fusion Systems, Zhijie Chen, Bin Rao, Yongzhen Li, Zhiwei Zong
Journal of System Simulation
Abstract: The system realization problem of netted radar data fusion systems was focused on. The design aspects of functionality, constitution and realization of netted radar systems were investigated. An architecture consisted of a CPCI (Compact PCI) industrial control computer and multiple digital DSP (Digital Signal Processing) processors was developed. The software workflows of each netting mode (centralized fusion and distributed fusion) were given and the simulation results related to typical scenarios were illustrated. The system can serve as a testing platform of efficiency evaluation relating to radar netting in the presence of electronic countermeasures.
Virtual Ceramic Art Creation And Simulation Based On Osg, Zhao Zhi, Jianwen Song, Tiejun Li, Luo Yan, Wang Bo, Zhigeng Pan
Virtual Ceramic Art Creation And Simulation Based On Osg, Zhao Zhi, Jianwen Song, Tiejun Li, Luo Yan, Wang Bo, Zhigeng Pan
Journal of System Simulation
Abstract: It is so complicated that artist would keep away from multiple related software file format conversion with independent software systems, when artist creates works of ceramic art with CAD. Therefore, many people are still engaged in making ceramic art using traditional methods at present. With the continuous improvement of the quality of Chinese social life, people's demand for ceramic art is increasing and artist's works could not meet the needs of people. This paper study the key technology that enable non-professional people to experience the whole process of Casting, Glazing, Firing and Finishing with VR and to enjoy their …
Simulation Of Coal Flow Movement Process In Coal And Gas Outburst Of Roadway Network, Zongxiang Li, Yadi Wang, Chunhua Zhang, Tianming Wang
Simulation Of Coal Flow Movement Process In Coal And Gas Outburst Of Roadway Network, Zongxiang Li, Yadi Wang, Chunhua Zhang, Tianming Wang
Journal of System Simulation
Abstract: In order to improve the simulation accuracy of the process in coal and gas outburst disaster period, time step method was put forward to describing the movement and accumulation of coal flow in roadway network when coal and gas outburst happened. Downward dip angles of tunnel were taken as the independent variables, model for distribution weight of coal output was built based on “Downward Priority” principle, and the model could adapt to downward roadway, nearly horizontal roadway and upward roadway. Strength change of outburst coal was established based on the collapse model. Combining with the coal and gas outburst …
Simulation Research And Application On Urban Rail Transit Fully Automatic Operation System, Du Heng, Chunhai Gao, Huang Qing, Huaiming Cang
Simulation Research And Application On Urban Rail Transit Fully Automatic Operation System, Du Heng, Chunhai Gao, Huang Qing, Huaiming Cang
Journal of System Simulation
Abstract: Following the development of the key technologies for the Fully Automatic Operation (FAO) of urban rail transit and the application of autonomous fully automatic operation system demonstration projects, more and more urban rail transit lines choose the FAO system. High availability, high reliability and high security also need high requirements on the testing and verification before the line is operated. Through the simulation research of the fully automatic operation system, combined with the comprehensive debugging and verification management platform of the Yanfang Line's fully automatic independent demonstration project, the scenario-based FAO system simulation model is established, the key technologies …
Robot Arm Control Method Based On Deep Reinforcement Learning, Heyu Li, Zhilong Zhao, Gu Lei, Liqin Guo, Zeng Bi, Tingyu Lin
Robot Arm Control Method Based On Deep Reinforcement Learning, Heyu Li, Zhilong Zhao, Gu Lei, Liqin Guo, Zeng Bi, Tingyu Lin
Journal of System Simulation
Abstract: Deep reinforcement learning continues to explore in the environment and adjusts the neural network parameters by the reward function. The actual production line can not be used as the trial and error environment for the algorithm, so there is not enough data. For that, this paper constructs a virtual robot arm simulation environment, including the robot arm and the object. The Deep Deterministic Policy Gradient (DDPG),in which the state variables and reward function are set,is trained by deep reinforcement learning algorithm in the simulation environment to realize the target of controlling the robot arm to move the gripper below …
Credible Optimum Selection Of Guidance System Simulation Based On Entropy Weight Vikor Method, Wenguang Yang, Yunjie Wu
Credible Optimum Selection Of Guidance System Simulation Based On Entropy Weight Vikor Method, Wenguang Yang, Yunjie Wu
Journal of System Simulation
Abstract: As the core component of the missile system, the guidance system plays an increasingly important role in the design of missile system. In order to improve the accuracy of the guidance system, this paper obtains the experimental data under a number of parameter design schemes by means of simulation experiments. The problem of simulation credibility verification of guidance system is transformed into multi-attribute decision-making optimization problem, and a parameter optimization method of guidance system based on improved VIKOR method is designed. The improved VIKOR method overcomes the phenomenon of rank reversal and ensures that the optimal final compromise solution …
Analysis And Optimization Of Hospital Pharmacy Sorting System Based On Simulation, Liu Shuang, Lü Chao
Analysis And Optimization Of Hospital Pharmacy Sorting System Based On Simulation, Liu Shuang, Lü Chao
Journal of System Simulation
Abstract: The assignment rules are presented by researching system data information with a large Chinese medicine pharmacy sorting system as an object. Based on simulation technology, the system model is presented; the system operation time, cost, efficiency, and assigned laws and human resources configuration as well as many other factors affecting the performance of the system are analyzed. Based on the analysis of the original system, three optimization schemes are designed and compared. The simulation results show that, during the same simulation period, the reallocation of human resources can reduce the economic cost, but it has little improvement on …
Channel Modeling And Networking Simulation Of Full Duplex Communication, Zhimin Liu, Sun Jie, Jiarui Ding
Channel Modeling And Networking Simulation Of Full Duplex Communication, Zhimin Liu, Sun Jie, Jiarui Ding
Journal of System Simulation
Abstract: Full duplex communication is a new wireless communicating technology for improving the spectrum efficiency substantially. Few researches study full duplex networking technology now nationally and internationally. The architecture and implementation approach of full duplex communication system are introduced to describe the main model and functions of the platform in detail. After analyzing different kinds of self-interference cancellation technology, the self-interference cancellation module and channel model of full duplex system in the platform is built based on C language,which lays a foundation for prospective full duplex networking technology. Simulation results verify the platform’s effectiveness, and present the spectrum efficiency and …
Correlation Analysis Model Of Generalized Stochastic System Dynamics, Guangqiu Huang, Qiuqin Lu
Correlation Analysis Model Of Generalized Stochastic System Dynamics, Guangqiu Huang, Qiuqin Lu
Journal of System Simulation
Abstract: In order to solve the problem of system dynamics (SD) simulation and correlation analysis of complex system containing random possesses, the generalized stochastic Petri-net (GSPN) is expanded into the generalized stochastic function Petri-net (GSFPN), and a GSFPN-SD model is proposed by combining GSFPN and SD. The GSFPN-SD model has the following advantages: (1) the process of state evolution is more clear by firing transits; (2) it describes the autonomous dynamic evolution of complex system more realistically as system’s dynamic change is driven by events; (3) transits are fired by tokens' movement, thus the system states can conditionally or …
Research On The Torque Ripple Of Brushless Dc Motor Under Non-Ideal Emf, Kun Xia, Bin Dong, Lu Jing
Research On The Torque Ripple Of Brushless Dc Motor Under Non-Ideal Emf, Kun Xia, Bin Dong, Lu Jing
Journal of System Simulation
Abstract: Non-ideal back-EMF waveform of brushless DC motor is unavoidable due to manufactory technology limitation, which contributes to the torque ripple and requires high performance controller to suppress the influence. Several back-EMF waveforms are analyzed and mathematical model of non-ideal back-EMF is proposed. The torque ripple under the non-ideal waveform is calculated and the relationship between torque ripple and the shape of back-EMF waveform is achieved by this model. The change of torque ripple under non-ideal back-EMF is simulated with driving current of square wave and sinusoidal wave. The results show the effectiveness of the back-EMF model for calculating …