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4,159 full-text articles. Page 196 of 206.

Nonlinear Characteristics Of Transmission System Of Shearer Cutting Unit, Dongsheng Zhang, Haiyang Yu, Jianbo Xu, Li Yan 2019 School of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China;

Nonlinear Characteristics Of Transmission System Of Shearer Cutting Unit, Dongsheng Zhang, Haiyang Yu, Jianbo Xu, Li Yan

Journal of System Simulation

Abstract: The nonlinear dynamics model of gear transmissionsystem of shearer cutting unit is established. The nonlinear dynamics theory of gear is applied to the transmission system of shearer cutting unit, and the effect of damping ratio and vibration frequency on the nonlinear dynamics of the system is considered. Fourth order Runge-Kutta method with variable step is employed to solve the nonlinear systems differential equations. The phase plan and Poincare section of the system response are obtained with different parameters. The results show that the nonlinear influence of the displacement response of the solar wheel is stronger when the damping ratio …


Design And Realization Of Rfid-Enabled Conwip Strategy For Multi-Echelon Inventory Of Distribution Network, Xiaoju Han, Dingwei Wang 2019 1.College of Information Science and Engineering, Northeastern University, Shenyang 110819, China; ;2.School of Automation Engineering, Northeast Dianli University, Jilin 132012, China;

Design And Realization Of Rfid-Enabled Conwip Strategy For Multi-Echelon Inventory Of Distribution Network, Xiaoju Han, Dingwei Wang

Journal of System Simulation

Abstract: Because the RFID technology can visualize the quantity on the way and the inventory status of the supply chain remotely and in real-time,a RFID-enabled electronic card system is designed. The CONWIP control strategy of multi-echelon production inventory system is extended to thedistribution network ofsupply chain.The CONWIPcontrol strategy model is established, and experimental simulation system is exploited. The strategy is compared with the (r,Q) and Push strategies under different network structuresof supply chain. The strategies’ influences on the performance of supply chain are verified by calculating the evaluationindex. Simulation results show that the RFID-Enabled CONWIP strategycan …


Simulation Of Electronic Transformer In Line With Ft3 Frame Format, Yu Fei, Hailong Zhang, Qingle Sun 2019 College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;

Simulation Of Electronic Transformer In Line With Ft3 Frame Format, Yu Fei, Hailong Zhang, Qingle Sun

Journal of System Simulation

Abstract: In the power system, electronic current transformer based on the Rogowski coil has been widely used in digital substation. Based on the analysis of its composition and structure, the electronic transformer is simulated by the Simulink module in Matlab. Rogowski coil is used to simulate the traditional transformer. Using Σ-Δ ADC converter and digital filter, analog signal from the high-pressure side is converted to digital output data, which is sent via fiber optic Ethernet to FPGA development board after FT3 format framing by Simulink. The data is then sent to the merged unit of transformer’s interface after Manchester encoding …


Study On Vehicle Handling Inverse Dynamics Based On Model Predictive Control Theory, Yingjie Liu, Liu Yun, Shanshan Guo 2019 School of Mechanical-Electronic and Vehicle Engineering, Weifang University, Weifang 261061, China;

Study On Vehicle Handling Inverse Dynamics Based On Model Predictive Control Theory, Yingjie Liu, Liu Yun, Shanshan Guo

Journal of System Simulation

Abstract: In order to solve the problem that driver modeling is difficult in vehicle handling dynamics, a study method of vehicle handling inverse dynamics is proposed. Based on model predictive control (MPC), the steering angle input is used as the control variable and the control object is to track the desired path. The optimal control problem of tracking the given path with high speed in vehicle handling inverse dynamics is converted into a secondary planning problem which is then solved by the active set method. The results show that the model predictive control has the advantage of high computing precision …


Soc Estimation With Extended Kalmanfilter Based On Fuzzy Control, Fang Lei, Chen Yong, Zhao Li, Kangsheng Yin, Zheng Yang 2019 Beijing Information Science & Technology University, Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing100192, China;

Soc Estimation With Extended Kalmanfilter Based On Fuzzy Control, Fang Lei, Chen Yong, Zhao Li, Kangsheng Yin, Zheng Yang

Journal of System Simulation

Abstract: Many factors affect battery’s state of charge (SOC), such as temperature, charge/discharge rate, cycle life and so on.Extended Kalman filter (EKF) iscommonly used to estimate battery’s SOC.The observation equation’s error affects the accuracy of battery’s SOC estimationusing traditional EKF.Considering the effects of temperature and charge/discharge rateon the observation equation’s error, an SOC estimation method using EKF based on fuzzy controlis presented.Mamdani type fuzzy controller is establishedwiththe proposed method, in which temperature and charge/discharge rateare selected as thecontroller’sinput, and the observation matrix’s correction coefficient isused as thecontroller’s output to improvethe filtering process in real time.The simulationresults show that …


Data Driven Pre Tuning Adaptive Subspace Model Predictive Control, Han Pu, Liu Miao, Jia Hao 2019 Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation, Department of Automation, North China Electric Power University, Baoding 071003, China;

Data Driven Pre Tuning Adaptive Subspace Model Predictive Control, Han Pu, Liu Miao, Jia Hao

Journal of System Simulation

Abstract: The problem of predictive control is investigated for power plant superheated steam temperature system with the characteristics of large delay, large inertia and time-varying. The data driven pre tuning adaptive subspace model predictive control (PTA-MPC) method, which combines the advantages of subspace identification and state space predictive control, is proposed. The state space models of multiple conditions are obtained by subspace identification with the input signal in persistent excitation. The predictive control law is derived with the state space models, and the controller parameters are optimized by using particle swarm optimization (PSO) algorithm. Based on the least square parameter …


Swept Volume Generation For Virtual Operation Of Micro And Nano-Devices, Xu Wei, Zhao Xin, Guangyi Sun 2019 Institute of Robotics and Automatic Information System, Tianjin Key Laboratory of Intelligent Robotics, Tianjin 300071, China;

Swept Volume Generation For Virtual Operation Of Micro And Nano-Devices, Xu Wei, Zhao Xin, Guangyi Sun

Journal of System Simulation

Abstract: With the increasing popularity of computer technology, it becomes important to obtain the swept volume of target objects or spatial point sets, effectively. In order to solve the problem, a voxel-based method is proposed to generate swept volume. OpenMP and C++AMP parallel computing technologies are used for fast voxel-based operation. By using C++ AMP technology, the computing speed is improved greatly. Traditionally, swept volume has been used in the field of path planning and industrial assembly. In this paper, swept volume technology is applied to the simulation of virtual operation of micro and nano-devices for the first time. The …


Collision Detection Algorithm Of Deformable Object Based On Snake Model Optimization, Li Zhao, Yanxia Jin, Zhipeng Qin, Ren Chao 2019 School of Computer Science and Control Engineering, North University of China, Taiyuan 030051, China;

Collision Detection Algorithm Of Deformable Object Based On Snake Model Optimization, Li Zhao, Yanxia Jin, Zhipeng Qin, Ren Chao

Journal of System Simulation

Abstract: In view of the existing collision detection algorithm which is difficult to solve the collision of real-time and reality, an improved algorithm of collision detection was propsed based on deformable objects. The algorithm based on K-DOPs bounding box applied to update process used the improved PSO algorithm to optimize the Snake model boundary. The concave in collision region, the control point clusters and the center formed multi-linear swarm with the improved selection method and the ulti PSO algorithm. Experimental results show that the improved collision detection algorithm can accurate simulate object contour, simplify the bounding box to …


Correlation Analysis Model Of Generalized Stochastic System Dynamics, Guangqiu Huang, Qiuqin Lu 2019 School of Management, Xi'an University of Architecture and Technology, Xi'an 710055, China;

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 …


Simulation On Step-Mode Invertervoltage Regulator Technology Of Independent Dc, Ximei Liu, Li Xiao, Qingle Sun 2019 College of Automation and Electrical Engineering, Qingdao University of Science & Technology, Qingdao 266042, China;

Simulation On Step-Mode Invertervoltage Regulator Technology Of Independent Dc, Ximei Liu, Li Xiao, Qingle Sun

Journal of System Simulation

Abstract: Pulse width modulation (PWM) is employed to control the delivery of independent power supply,and applied in the field of inverter with combination of the ladder wave modulation technology.The closed loop control of output voltage is realized by changing the PWM duty cycle with the PI controller. The output voltage of the inverter can be automatically adjusted by the set value, which enables the application in power system and medium/large power motor speed control system.This article introduces the topology of step-mode inverter and design method of 31-levelinverter.The step-mode inverter has characteristics of simple circuit structure, flexible control …


Dynamic Relaxation Cooperative Optimization Method With Fast Convergence, Chen Jing, Yuchao Lü, Limin Wang 2019 1.College of Mechanical and Control Engineering, Guilin 541004, China; ;

Dynamic Relaxation Cooperative Optimization Method With Fast Convergence, Chen Jing, Yuchao Lü, Limin Wang

Journal of System Simulation

Abstract: To solve problem of high computational cost and low convergence speed of initial points away from the optimal solution in collaborative optimization, a new dynamic relaxation cooperative optimization method with fast convergence is presented. Two-phase optimization is adopted in this method. In the accelerating convergence phase, the calculation method of relaxation factor is improved, and the inconsistent information between the optimal value of disciplines and its mean value is used to construct the relaxation factor. The optimization solution of the first phase is adopted as the initial points in the optimization solution phase. The relaxation factor satisfying the consistent …


Study On Application Of Hybrid Optimization Algorithm In Parameters Optimization Of Manipulator, Chikun Gong, Yinghui Sun, Lipeng Yuan 2019 1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; ;

Study On Application Of Hybrid Optimization Algorithm In Parameters Optimization Of Manipulator, Chikun Gong, Yinghui Sun, Lipeng Yuan

Journal of System Simulation

Abstract: When the industrial robot carries on the precise processing, it is possible to finish in the work space of the whole attitude. In order to obtain the compact structure and meet the processing point, a new hybrid optimization algorithm is proposed. The structure model of the robot is established, and the global optimal particle and inertia weight of the particle swarm is introduced. The two parameters are classified by the intermediate value. The dynamic changes of the search medium and the optimization ability are enhanced. After verification, the algorithm has better search ability and higher accuracy. Finally, parameter …


Simulation And Analysis Of Gas Replacement In Sealed Capsule, Xiaohui Guan, Zhou Lin 2019 Institute of Systems Engineering, CAEP, Mianyang 621000, China;

Simulation And Analysis Of Gas Replacement In Sealed Capsule, Xiaohui Guan, Zhou Lin

Journal of System Simulation

Abstract: The multicomponent gas replacement operations in the sealed capsule with cavities connected by slit are modeled and simulated based on the analytic estimation and the CFD numerical simulation methods in this paper. Corresponding result comparisons and discussions on the time costs and replacement effects of different replacement operations and parameters are presented. The estimation and numerical simulation results of mixing and compression replacement operations with different gas velocities demonstrate that, for the cavity connected by slit, analytic estimation method underestimates the effects of mixing replacement operation, but overestimates the compression replacement effects. During the mixing replacement operation, higher …


Simulation System For Special Material Processing Training Based On Augmented Reality Technology, Bin Luo, Shuangquan Ge 2019 Institute of Computer Application, Academy of China Engineering Physics, Mianyang 621900, China;

Simulation System For Special Material Processing Training Based On Augmented Reality Technology, Bin Luo, Shuangquan Ge

Journal of System Simulation

Abstract: A simulation system for special material processing training within the shielded environment is developed based on augmented reality technology. An observation system composed of analogue camera and network high dome system camera is designed and constructed to extend the view scope of operators. Single hand finger recognition technology is then combined with the observation system to implement friendly interactions between operators and the simulation system, and to achieve interactive training. Augmented reality technology is applied to create fused virtual-real vision, which leads to the implementation of augmented processing induction of cone-shaped part. Primary tests show that the developed …


Research On Balance Cognition Based On Multi-Level Heuristic Dynamic Programming Of Flexible Robot, Chen Jing 2019 School of Information Technology Engineering, Tianjin University of Technology and Education, Tianjin 300222, China;

Research On Balance Cognition Based On Multi-Level Heuristic Dynamic Programming Of Flexible Robot, Chen Jing

Journal of System Simulation

Abstract: Aiming at the stable self-balancing cognition problems of flexible self-balancing robot, a balance cognition method based on multi-level heuristic dynamic programming is proposed and applied on the self-balance learning of flexible self-balancing robot in this paper. In the proposed cognition method, the original reward mechanism with discrete form is transformed into a continuous form by introducing the orientational reward module, and the converted continuous reward signal is used as the major basis for evaluation. The scheme enables the robot to record more information in the autonomic cognition process and improve its cognitive ability. Through the robot self-balancing …


Dual Channel Maneuver Flight Control Based On Dynamic Inverse And Dynamic Sliding Mode, Shengyi Yang, Liu Chao, Shengjing Tang, Weili Yang 2019 1.Key Laboratory of Pattern Recognition and Intelligent Systems of Guizhou Province, Guizhou Minzu University, Guiyang 550025, China; ;2.Key Laboratory of Dynamics and Control of Flight Vehicle , Ministry of Education , Beijing Institute of Technology, Beijing 100081, China;

Dual Channel Maneuver Flight Control Based On Dynamic Inverse And Dynamic Sliding Mode, Shengyi Yang, Liu Chao, Shengjing Tang, Weili Yang

Journal of System Simulation

Abstract: In order to solve the flight control problem of mini quadrotor with large angle and fast maneuver, a new dual channel maneuver flight control method based on dynamic inverse (DI) and sliding mode control (SMC) is proposed. By combining SMC and DI, this method makes the system robust to the model uncertainty and aerodynamic interference. The dynamic SMC effectively reduces system’s chattering. New sliding mode surface and quaternion regular model of aircraft attitude are built to improve the control precision and resolve the singular problem of aircraft. The DI improves the system’s dynamic response, and …


Numerical Simulation Of Thermal Comfort And Pm10 Concentration Distribution In A320 Aircraft Cabin, Jiaquan Lin, Ruiting Wang 2019 Institute of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300, China;

Numerical Simulation Of Thermal Comfort And Pm10 Concentration Distribution In A320 Aircraft Cabin, Jiaquan Lin, Ruiting Wang

Journal of System Simulation

Abstract: A model of A320 aircraft cabin and human body was established using CFD. Temperature field, velocity field and PM10 concentration field was simulated at different air supply rate of the bridge load air conditioning based on mathematical model of fluid dynamics in cabin. The values of the ADPI and drainage efficiency were calculated respectively at different air supply rate. The optimal supply air velocity evaluation function was constructed based on ADPI and drainage efficiency. The wind speed, temperature and PM10 concentration of the sample points were used to calculate the value of the evaluation function with different …


Modeling And Simulation Of Potential Detection System Based On Woven Electrode, Longfei Li, Yongsheng Ding 2019 Engineering Research Center of Digitized Textile & Fashion Technology, Ministry of Education,College of Information Sciences and Technology, Donghua University, Shanghai 201620, China;

Modeling And Simulation Of Potential Detection System Based On Woven Electrode, Longfei Li, Yongsheng Ding

Journal of System Simulation

Abstract: Range of interlacing resistance of woven electrode is induced. Mathematical models of field point potential, electrode potential and electrode potentials difference are constructed. Electrode potential is the weighted mean of field point potentials at interlacing points. Effects of position, size of electrode, and contact resistance on electrode potential are investigated by simulation. Results indicate that there exists two extreme value points at which electrode potential reaches maximum and minimum, respectively. The absolute value of electrode potential extreme value decreases with the increase of electrode’s size. The electrode potential is independent of contact resistance if the expectation of contact resistance …


Multi-Response Parameters Optimization Based On Pca And Neural Network, Jianli Yu, Hongqi Huang, Manxiang Miao 2019 1.School of Management Science Engineering, Zhengzhou University of Aeronautical, Zhengzhou 450046, China; ;

Multi-Response Parameters Optimization Based On Pca And Neural Network, Jianli Yu, Hongqi Huang, Manxiang Miao

Journal of System Simulation

Abstract: A multi-response parameters optimization method based on principal component analysis (PCA) and neural network is proposed. It is used to optimize temperature and time parameters in complex thermal polymerization process. By using the method of weighted PCA, two response indexes, capacity value and loss tangent value, are converted into a single quality performance index. The main effect value is used to identify the search range. The radical basis function (RBF) neural network model is established to search and identify the optimal process parameters. Results show that response indexes are improved and the optimization effect is obvious. Therefore, this study …


Chemical Process Monitoring Based On Dnpe-Svdd, Xiaochun Han, Cuimei Bo, Yi Hui 2019 College of Electrical Engineering and Control Science, Nanjing TECH University, Nanjing 211816, China;

Chemical Process Monitoring Based On Dnpe-Svdd, Xiaochun Han, Cuimei Bo, Yi Hui

Journal of System Simulation

Abstract: Chemical processes test dataset are high dimensional, and have the combined feature of nonlinear and dynamic characteristics. However, traditional linear dimension reduction algorithm cannot extract the local structure information and dynamic characteristics. The monitoring model of chemical process based on dynamic neighborhood preserving embedding-support vector data description (DNPE-SVDD) algorithm is proposed. With the superiority of NPE in nonlinear dimensionality reduction and SVDD in the detection of outliers, dimension is reduced by DNPE algorithm and the monitoring model of the manifold space with reduced dimension is established by SVDD algorithm. The Tennessee Eastman (TE) process is simulated using the proposed …


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