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4,171 full-text articles. Page 90 of 207.

Interactive Assembly Simulation Platform For Complex Gearbox In Virtual Environmen, Chunyang Jia, Xiangjun Zou, Jinhui Li, Zeqin Zeng, Wang Jie 2020 College of Engineering, South China Agricultural University, Guangzhou 510642, China;

Interactive Assembly Simulation Platform For Complex Gearbox In Virtual Environmen, Chunyang Jia, Xiangjun Zou, Jinhui Li, Zeqin Zeng, Wang Jie

Journal of System Simulation

Abstract: Aiming at the human-computer interaction, behavior simulation and user design in virtual assembly, based on the complex gearbox of large tractors, the simulation method of dynamic motion and behavior of gear with multi-collision body is studied. The positioning method of multi-part model based on axis constraints and surface constraints in virtual environment is proposed. The virtual environment of human-computer interaction is developed. The consumed time of per frame is about 10 ms, and the complex variable-speed motion behavior and its simulation are realized. The virtual assembly system is equipped with AR interface, which can realize the active intelligent virtual …


Ship's Rudder/Fin Joint Anti-Rolling Mpc Control Based On Feedback Linearization, Li Hui, Yingnan Xie, Liqi Lan 2020 Marine Electrical Engineering College, Dalian Maritime University, Dalian 116026, China;

Ship's Rudder/Fin Joint Anti-Rolling Mpc Control Based On Feedback Linearization, Li Hui, Yingnan Xie, Liqi Lan

Journal of System Simulation

Abstract: Aiming at the nonlinearity, strong coupling and multivariate characteristics of the ship motion system, and considering the influence of marine environment on ship motion, a four-degree-of-freedom (surging, swaying, rolling and yawing) motion nonlinear mathematical model is established to comprehensively represent the essential characteristics of ship motion. Since the model predictive control is an applied multivariable optimal control strategy, the ship rudder/fin joint anti-rolling Model Predictive Control (MPC) system based on feedback linearization is designed. The simulations of ship rolling and course-keeping joint control are carried out under different sea conditions, and the results show that the control method is …


Vertical Flight Simulation Performance Analysis Based On Power Function Control Command, Zhongjun Qu, Zeyu Kang, Yongmei Cheng 2020 1. Xi'an Flight Automatic Control Research Institute, Xi'an 710072, China; ;

Vertical Flight Simulation Performance Analysis Based On Power Function Control Command, Zhongjun Qu, Zeyu Kang, Yongmei Cheng

Journal of System Simulation

Abstract: Based on the fly height control method of modal direct switching, after the input of the control command, the control output may be oscillated or even diverged. The power function conforms to the variation law of the flight altitude command, and is used as the prototype function to derive the relationship between the given height, the current height and the vertical velocity. Using this transformation relationship as the input command of the vertical velocity control loop, a smooth control system is designed. The system does not require control modal switching and can achieve the flight altitude maintenance andflight altitude …


Dynamic Vehicle Distribution Path Optimization Based On Improved Intelligent Water Drop Algorithm, Shuangnan Fan, Jiming Chen, Weimin Gao, Zengfeng Wang 2020 1. Department of electrical and Information Engineering, Hunan Institute of Traffic Engineering, Hengyang 421009, China; ;

Dynamic Vehicle Distribution Path Optimization Based On Improved Intelligent Water Drop Algorithm, Shuangnan Fan, Jiming Chen, Weimin Gao, Zengfeng Wang

Journal of System Simulation

Abstract: In view of the unreasonable distribution path, low distribution efficiency and demand uncertainty in the current vehicle distribution process, a dynamic vehicle distribution path optimization method based on the improved intelligent drop algorithm is proposed. According to the customer's demand for delivery time, the soft time window penalty function and customer satisfaction function are constructed. Based on the characteristics of vehicle speed, damage cost, penalty cost and customer satisfaction of vehicle distribution, a vehicle path optimization model is established. The vehicle path optimization model is solved by the intelligent water droplet algorithm. The grey wolf optimization algorithm is used …


Optimal Control Research On Vehicle Magnetorheological Semi-Active Suspension Of Four Degrees Of Freedom, Yongshu Jia, Ahai Miu 2020 Zhejiang Industry & Trade Vocational College, Wenzhou 325003, China;

Optimal Control Research On Vehicle Magnetorheological Semi-Active Suspension Of Four Degrees Of Freedom, Yongshu Jia, Ahai Miu

Journal of System Simulation

Abstract: Based on system dynamics theory of vehicle, aiming at the model of 1/2 vehicle suspension, the vehicle magnetorheological semi-active suspension dynamic equation and space state equation with four degrees of freedom are established. A linear two times optimal controller and control algorithm for semi-active suspension are designed, and the control strategy based on magnetorheological damper of subdivision vibration velocity is proposed. Suspension simulation model is established to analyze the optimal control effect in SIMULINK. The results show that the magnetorheological semi-active suspension system based on the optimal control of the vehicle can reduce vehicle vertical vibration acceleration and vehicle …


Dynamic Environmental And Economic Dispatching Of Wind Farm Based On Multi-Objective, Le Wei, Xijin Li 2020 Department of Automation, North China Electric Power University, Baoding 071003, China;

Dynamic Environmental And Economic Dispatching Of Wind Farm Based On Multi-Objective, Le Wei, Xijin Li

Journal of System Simulation

Abstract: Wind farms are developing rapidly under the new policy on energy resources vigorously advocated by the state. Its output scheduling is very complex, and needs the integration of economic and environmental factors. Aiming at the large prediction error of wind power, in the dynamic environmental economic dispatch of wind farm, the cost of rotating reserve is taken into account within the generation cost, and the demand of wind power prediction error for rotating reserve capacity is taken into account within the constraint condition. Aiming at the minimum total cost of power generation, the minimum total pollutant emission and minimum …


Combat Effectiveness Simulation Evaluation Framework Of Complex Weapon System, Yonglin Lei, Zhu Zhi, bin Gan, Lei Sen, Chen Yong 2020 1. College of Systems Engineering, National University of Defense Technology, Changsha 410073, China; ;

Combat Effectiveness Simulation Evaluation Framework Of Complex Weapon System, Yonglin Lei, Zhu Zhi, Bin Gan, Lei Sen, Chen Yong

Journal of System Simulation

Abstract: Combat effectiveness evaluation of complex weapon system is a scientific issue both military departments and defense industry concern. Current researches on simulation-based weapon system combat effectiveness evaluation lack the specificity to complex weapon system and a simulation-based formal combat effectiveness evaluation framework is especially desired. A framework is created and formalized on three measure layers of performance-outcome-effectiveness. Within the framework, simulation inputs are classified into different categories different outcome measure layers and different effectiveness measure layers are considered. An example of combat effectiveness evaluation framework for typical ballistic missiles is presented to demonstrate the proposed framework.


A Continuous Non-Invasive Blood Pressure Prediction Method Based On Improved Svr Learning, Haixia Fan, Xiaohui Chen 2020 1. College of Electrical Engineering, Nanjing institute of industry technology, Nanjing 210023, China; ;

A Continuous Non-Invasive Blood Pressure Prediction Method Based On Improved Svr Learning, Haixia Fan, Xiaohui Chen

Journal of System Simulation

Abstract: Aiming at the accuracy of continuous non-invasmive monitoring of blood pressure by photoelectric method based on the photoplethysmography (PPG) signal and the electrocardiography (ECG) signal, is influenced by the differences of human characteristics, a blood pressure prediction method based on principal component analysis (PCA) and genetic algorithm (GA) to optimize machine learning model is proposed. The method processes the PPG signal, ECG signal and human body features to form a feature matrix, and uses an improved SVR learning model to perform regression training on the feature matrix and the real-time blood pressure value measured by the mercury sphygmomanometer. …


Research Overview On Modeling And Solution Of Aerospace Tt&C Scheduling Problem, Qingqing Yan, Huairong Shen, Qiongling Shao 2020 1. Department of Graduate Management, Equipment Academy, Beijing 101416, China;;

Research Overview On Modeling And Solution Of Aerospace Tt&C Scheduling Problem, Qingqing Yan, Huairong Shen, Qiongling Shao

Journal of System Simulation

Abstract: The research of Aerospace TT&C Scheduling (ATT&CS) is very important, because of its support for TT&C scheme decision-making and TT&C resource net constructing. The classification and resolution flow of the ATT&CS problem were introduced. Then, the modeling methods and related key techniques, such as designing of object function, analysis of constraints, and priority determining, were analyzed. The solving algorithms and conflict resolution methods were summed up, and the major categories of algorithm were evaluated. The main content of scheduling evaluation research was summarized. The possible future researches for related techniques were discussed based on the analysis of development and …


Overview Of Development And Current Progress In Maritime Simulation Research, Xinping Yan, Wu Bing, Wang Yang, Xiaoyang Wei 2020 1. Intelligent Transportation System Research Center, Wuhan University of Technology, Wuhan 430063, China;;2. National Engineering Research Center for Water Transport Safety, Wuhan 430063, China;;3. Engineering Research Center for Transportation Safety (Ministry of Education), Wuhan 430063, China;

Overview Of Development And Current Progress In Maritime Simulation Research, Xinping Yan, Wu Bing, Wang Yang, Xiaoyang Wei

Journal of System Simulation

Abstract: Maritime simulation plays an essential role in security of ship navigation, the innovation of the administration and the improvement of management ability. The traditional maritime simulation was surveyed, and the scope of maritime simulation was specified. Moreover, the research related to maritime simulation was overviewed under the proposed scope of maritime simulation. To gain a deeper insight into the research domain, maritime simulation was scrutinized in two dimensions. From the perspective of the simulation scale, modeling characters, and user requirements, maritime simulation was divided into macro, medium and micro scales; whereas in the viewpoint of comprehensive safety …


Principe Of Behavior Computing On Emotional Game, Guofeng Zhang, Wang Niu, Xiong Hu 2020 1. Institute of Behavior Computing of Xi’an Technological University, Xi’an 710032, China;;

Principe Of Behavior Computing On Emotional Game, Guofeng Zhang, Wang Niu, Xiong Hu

Journal of System Simulation

Abstract: Emotions is analyzed by mathematical statistics as an influence factor on behavior interaction in the current behavioral game researches. On the face of the status quo, premising emotion rationality that is the alternative to results rationality, a fresh emotional game computing principle was proposed by building emotion behavior schemata function. The suggested thought was applied to a modified ultimatum game computing, an emotional equilibrium outcome was obtained, and the psychological mechanism of the brave behavior was revealed. Meanwhile, the basic principle of pattern recognition to behavior selection mode was established. According to the constraint conditions of …


Simulation And Analysis Of Wind Turbine Echoes, Weikun He, Yuluo Shi, Xiaoliang Wang, Yuzhao Ma, Renbiao Wu 2020 Tianjin Key Lab for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China;

Simulation And Analysis Of Wind Turbine Echoes, Weikun He, Yuluo Shi, Xiaoliang Wang, Yuzhao Ma, Renbiao Wu

Journal of System Simulation

Abstract: Wind turbines can have serious effect on ATC radar, communication and navigation equipments. Thus electromagnetic scattering features of wind turbine and its echo simulation technology are of vital significance to wind farm clutter suppression and ensure air traffic safety. Based on the model of wind turbine scattering points superposition, the radar echo simulation of the wind turbine was studied. Meanwhile, the effect of azimuth angle and elevation angle of the incident wave on the echoes were considered and the model of radar echo signal for any observation points was established. In addition, the characteristics of time domain, …


Full-Scale Dynamic Simulation For Structure Safety And Schedule Coupling Of Rcc Gravity Dams, Sherong Zhang, Chengbo Du, Wenqi Sa, Gaohui Wang, Wang Chao 2020 1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;;

Full-Scale Dynamic Simulation For Structure Safety And Schedule Coupling Of Rcc Gravity Dams, Sherong Zhang, Chengbo Du, Wenqi Sa, Gaohui Wang, Wang Chao

Journal of System Simulation

Abstract: By establishing the dynamic mapping relationship between the set of the construction state and the set of the emulation state of numerical simulation model, the method of three dimension and full-scale dynamic simulation for structure safety and schedule coupling during construction process was built. The method was used to dynamically analyze structure safety under any construction schedule condition of dam. VTK was utilized to realize three dimension and full-scale dynamic visualization for structure safety and schedule status coupling of RCC gravity dam during construction process. A three dimension and full-scale dynamic simulation and visualization system for structure safety and …


Research Of Radio Frequency Environment Algorithms For Radar System Of System Combat Simulation, Xinjun Zhao, Quanmin Wang, Yongxian Zou, Yufei Jia 2020 1. Beijing Special Vehicle Research Institute, Beijing 100072, China;;2. Science and Technology on Complex Land Systems Simulation Laboratory, Beijing 100072, China;

Research Of Radio Frequency Environment Algorithms For Radar System Of System Combat Simulation, Xinjun Zhao, Quanmin Wang, Yongxian Zou, Yufei Jia

Journal of System Simulation

Abstract: In weapons and equipment system of system simulation, radar systems are usually necessary composition. A complete radar combat system generally consists of radar models and electromagnetic (EM) environment models, and the reliability of simulation results was decided by these two elements. Despite of various radars, the EM environment simulation, especially radio frequency(RF) environment simulation, could be synthesized into a common and general purpose model, and support various radar simulation system. Based on RF environment effects analysis and their algorithms, a synthesized RF environment effect model was proposed, which could provide calculation for RF radar simulation. Two simulation examples involving …


Modeling And Simulation Of Wx And Interference Display Of Aew Radar Simulator, Xiaojun Chu 2020 Naval Aeronautical Engineering Academy Qingdao Branch, Qingdao 260041, China;

Modeling And Simulation Of Wx And Interference Display Of Aew Radar Simulator, Xiaojun Chu

Journal of System Simulation

Abstract: Three are two bottlenecks during training: irregular form display simulation of weather target and display simulation of electromagnetic interference in AEW radar training simulator. The weather target display was realized by building weather controlling model and irregular form of weather target based on Bezier Curve and path developed was simulated by VC++. Interference display of AEW radar was realized by building model of various interference patterns and rejecting operation was simulated by building operating model. A lot of difficulties of PPI for AEW radar training simulator were settled: such as random distribution of weather target, irregular form of …


Research On Dynamic Real-Time Infrared Complicated Scene Generation Technology, Zhifeng Lu, Gao Wen, Zehua Hong, Lai Peng 2020 Shanghai Electro-Mechanical Engineering Institute, Shanghai 201109, China;

Research On Dynamic Real-Time Infrared Complicated Scene Generation Technology, Zhifeng Lu, Gao Wen, Zehua Hong, Lai Peng

Journal of System Simulation

Abstract: The dynamic IR scene real-time generation technique is one of the key techniques in IR imaging HWIL simulation. On the basis of the external rendering, the dynamic IR complex scene real-time generation technique was proposed to break through the bottleneck of mutual restriction between imaging fidelity and real-time generation to ensure the real-time performance of the HWIL simulation systems. This technique has no minus effects on imaging fidelity, and moreover, it meets the real-time performance requirements of the HWIL simulation systems. This technique can be applied to the varied IR imaging simulation systems. This research plays an important role …


Modeling Of Collaborative Maintenance Operation Process Based On Resource Competition, Zhili Zhang, Xiangyang Li, Qinhe Gao, Liang Feng, Ma Chao 2020 1. Military Key Lab for Missile Launching & Orientation Aiming Technology, The Second Artillery Engineering University, Xi’an 710025, China;;

Modeling Of Collaborative Maintenance Operation Process Based On Resource Competition, Zhili Zhang, Xiangyang Li, Qinhe Gao, Liang Feng, Ma Chao

Journal of System Simulation

Abstract: The maintenance process of large-scale complex equipment usually requires the collaborative operations of multi operators, which makes the monopolistic maintenance resources become certain competition when allocated and utilized by operators. Based on the analysis of the characteristics and collaborative modes of collaborative maintenance operation process (CMOP), the behavior analysis and state change description of related maintenance objects, operators and resources were performed with colored Petri net. Then considering the consumption of maintenance time, the collaborative maintenance operation process model of large-scale complex equipment was established based on resources competition mechanism. The relevant strategies to avoid resources competition and concurrent …


Research Of Joint Simulation Platform Supporting Interoperability Of Lvc, Jihong Cai, Duzheng Qing, Baodi Xie 2020 Science and Technology on Special System Simulation Laboratory Beijing Simulation Center, Beijing 100854, China;

Research Of Joint Simulation Platform Supporting Interoperability Of Lvc, Jihong Cai, Duzheng Qing, Baodi Xie

Journal of System Simulation

Abstract: In order to meet the requirements of armament test & training, a way to realize LVC simulation interoperability was proposed as what the advanced countries did and related key technologies including architecture, common object model description, middleware design, time management on WAN were illustrated in detail. Joint simulation (Josim in short) platform achieved significant progress for integration of Live/Virtual/Constructive simulations, and greatly enhanced the abilities of interoperability, reusability and composability for simulation resources. Some further research emphases in the area were given.


Simulation Research Of Adaptive K Value Location Privacy Protection In Augmented Reality, Yang Yang, Ruchuan Wang 2020 1. Department of Information Technology, Nanjing City Vocational College, Nanjing Radio and TV University, Nanjing 210002, China;;

Simulation Research Of Adaptive K Value Location Privacy Protection In Augmented Reality, Yang Yang, Ruchuan Wang

Journal of System Simulation

Abstract: With the development of wireless communication and augmented reality technology, the application of LBS is wide. It provides enormous convenience to people life. It may obtain user location information at anytime and anywhere. So user location privacy safety suffers huge threats. Therefore, data safety is worth paying attention in LBS. The advantages and disadvantages of the existing location privacy protection methods in LBS were analyzed, and adaptive K value location privacy protection method was proposed according to different privacy level. This method used k-anonymity method and pseudonym method hand in hand. It used trusted third party as location privacy …


Simulation Experiment Of Ultrasonic Assisted Grinding Along Axial Direction On Basis Of Deform-3d, Wang Yan, Zhang Sheng, Wang Shuai, Yang Lin, Jianhua Xie 2020 University of Shanghai for Science and Technology, Shanghai 200093, China;

Simulation Experiment Of Ultrasonic Assisted Grinding Along Axial Direction On Basis Of Deform-3d, Wang Yan, Zhang Sheng, Wang Shuai, Yang Lin, Jianhua Xie

Journal of System Simulation

Abstract: Grinding process can be regarded as cumulative cutting effect of a large number of random scattered grits, a novel simulation method concerning ultrasonic vibration assisted single grit grinding was put forward. The single grit grinding of axial ultrasonic vibration was simulated in Deform-3D. The simulation results demonstrate that the maximum temperature in ultrasonic vibration grinding zone is less than that of ordinary grinding zone under the same grinding conditions; Both the normal and tangential force of vibration assisted grinding are less than the ordinary grinding. Grinding temperature and force ratio increase as the increase of abrasive velocity, on the …


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