Modeling And Simulation Of Bldcm Fuzzy Control System With Real-Time Modification Function,
2020
School of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;
Modeling And Simulation Of Bldcm Fuzzy Control System With Real-Time Modification Function, Yuanwang Deng, Zeng Jun
Journal of System Simulation
Abstract: Based on the analysis of the mathematical model of brushless direct current motor (BLDCM), a novel method for modeling of BLDCM was proposed. In MATLAB, the model of BLDCM was established by C MEX S-function, and the simulation results showed that the proposed method can enhance the simulation efficiency. Based on the modeling and simulation of BLDCM, a modification function was introduced and a self-turning fuzzy controller was built. According to the error and error rate of speed, the proposed modification function performed real-time regulation of fuzzy rules. There were six regulation parameters …
Research Of Approximation Algorithm Of Vertex Cover,
2020
School of information science, Guangdong University of Finance and Economics, Guangzhou 510320, China;
Research Of Approximation Algorithm Of Vertex Cover, Wenyu Gao, Li Hua
Journal of System Simulation
Abstract: Vertex cover is one of the most important NP complete problems, and it is also one of the most studied problems in parameterized algorithm design in recent years. According to some deficiencies of existing vertex cover approximation algorithms, a novel NT theorem based 2-approximation algorithm was proposed based on advances in parameterized algorithm. The new algorithm first used kernelization technology to reduce the origin graph, then used greedy strategy to guide the vertex selection in the remaining graph, kernelization provided effective guarantee for the approximation algorithm. In order to test the performance of the new algorithm, simulations on different …
Analysis Of Risks Transmission And Control In Subway Construction,
2020
School of Civil and Architecture Engineering, Xi’an Technological University, Xi’an 710021, China;
Analysis Of Risks Transmission And Control In Subway Construction, Qingjun Guo, Hongyu Yan, Bosen Li
Journal of System Simulation
Abstract: The process of the transmission and control of hidden dangers in subway construction is very similar to that of infectious diseases. Based on an engineering example, the characteristics of the complex system in the subway construction site are analyzed, and a simulation method using the propagation dynamics model to describe the interaction and propagation of various elements is proposed. Hazard source and hidden danger data of a section of Qingdao metro line 4 from march to August 2017 are selected as the original state, using by MATLAB R2014a simulation calculation, the densities of different elements are gotten, the process …
Hardware-In-The-Loop Simulation System For Underwater Vehicle Based On Unity3d,
2020
Northeast Petroleum University, Daqing 163318, China;
Hardware-In-The-Loop Simulation System For Underwater Vehicle Based On Unity3d, Fushen Ren, Yaqi Sun, Hu Qing, Zhaoliang Li, Pengyu Sun, Yukun Fan
Journal of System Simulation
Abstract: In order to provide a simulation and test platform for the performance test, control algorithm analysis and operation training of underwater robot, a hardware-in-the-loop simulation system based on Unity3D is developed, which consists of a ground control terminal, a robot body and a three-dimensional simulation system. The system uses the same ground control terminal as the unified command input source of the three-dimensional simulation system and robot control system, and realizes the synchronization of the virtual object and robot body, real-time monitoring and parameters adjustment to the system. The position of the robot is collected by multiocular vision technology, …
Robust Heading Control Of An Unmanned Surface Vehicle Based On Lpv Model,
2020
1. Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China;;2. Shenyang Institute of Automation (Guangzhou), Chinese Academy of Sciences, Guangzhou 511458, China;
Robust Heading Control Of An Unmanned Surface Vehicle Based On Lpv Model, Junfeng Xiong, Yuqing He, Jianda Han, Mingzhe Yuan
Journal of System Simulation
Abstract: Aiming at the strong nonlinearities of hydrodynamics, and the influences of wind, wave and current on USVs (Unmanned Surface Vehicles), an H∞ robust yaw keeping controller based on LPV (Linear Parameter Varying) model is proposed. The LPV model uses the Froude number as the varying parameter, reflects the USV’s nonlinear hydrodynamics along with the Froude number, and simplifies the parameters identification and controller design. By using the Froude number as the scheduled parameter, an H∞ robust yaw keeping controller is designed on the basis of bounded real lemmas to attenuate the disturbances. Simulations on a 3-DOF underactuated …
Numerical Simulation Study Of Impact Of Stagger Angle And Radius Ratio On Performance Of Combined Type Vawt,
2020
1. Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou 511458, China;;2. Hong Kong University of Science and Technology,Hong Kong, China;;
Numerical Simulation Study Of Impact Of Stagger Angle And Radius Ratio On Performance Of Combined Type Vawt, Xiucong Fu, Xiaoting Liang, Baoxing Ou, Chili Wu, Ruheng Zhao, Yuepeng Li, Kaihong Pi, Xiao Shuai
Journal of System Simulation
Abstract: Darrieus-Savonius combined rotor could effectively improve the performance of sole type vertical axis wind turbine. In order to investigate the impacts of radius ratios and stagger angles on the combined rotor, and their best combination, aerodynamic simulations of different radius ratios and stagger angles were studied. The numerical simulation is based on 2D unsteady incompressible air model and realizable k-ε turbulence model. The result indicates that the radius ratio represents the occupied swept area of Savonius rotor, the larger radius ratio, the higher proportion of the positive momentum outputs (M≥0) in a rotation period. In addition, …
Study On Defect Shape Influence On Strength Of Oilfield Water Injection Tubing,
2020
1. State Key Laboratory of Oil and Gas Geology and Exploration, Southwest Petroleum University, Chengdu 610500, China;;
Study On Defect Shape Influence On Strength Of Oilfield Water Injection Tubing, Qingyou Liu, Xu Tao
Journal of System Simulation
Abstract: Oilfield water injection tubing can form various defects which affect the strength of tubing body during the installation and other operations. For studying the influence of different shape defects to stress field of the oilfield water injection tubing, three kinds of defects which are hemispherical, half cylindrical and conical were chosen on the body surface of oilfield water injection tubing, to analyze the stress field distribution of tube body in the three kinds of load conditions that are the single internal pressure, the tensile load and internal pressure-tensile complex load. The simulation result show that: there are high and …
Multi-Objective Topology Mapping Method For Network Emulation,
2020
School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China;
Multi-Objective Topology Mapping Method For Network Emulation, Xiaofeng Wang, Chen Yang, Guangjie Zhang, Jianyu Chen
Journal of System Simulation
Abstract: Network emulation is an important support for the verification of new network technology, and effective mapping is the key to the emulation network topology. Considering the multiple resource requirements, a multi-objective topology mapping method (MOTM) for network emulation topology is proposed to realize the effective physical resources utilization. The method analyzes the resource requirements of nodes and links, assigns corresponding weights, converts the mapping problem into the graph partitioning problem, divides the graph by multi-level graph partitioning method, and forms a mapping strategy through remote throughput threshold optimization adjustment. The automatic deployment is implemented based on the …
3d Human Pose Tracking Approach Based On Double Kinect Sensors,
2020
1. Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China;;2. University of Chinese Academy of Sciences, Beijing 100049, China;;
3d Human Pose Tracking Approach Based On Double Kinect Sensors, Li Qi, Xiangdong Wang, Li Hua
Journal of System Simulation
Abstract: 3D human pose estimation and tracking is a popular problem of machine vision. In order to improve the stability of human pose tracking, the human body motion posture is represented by the human joint DOF (Degree of Freedom) vector, the human pose is tracked by the unscented Kalman filter method, and a human pose tracking system based on double Kinect sensors is built. Compared with the traditional human motion capture system, the system can accurately and stably track 3D human pose under simple movements, reflect the special nature of the motion process under complex movements, and can be used …
Image Skeleton Extraction Method Based On Flood-Fill,
2020
School of Information Science and Technology, North China University of Technology, Beijing 100144, China;
Image Skeleton Extraction Method Based On Flood-Fill, Xingquan Cai, Zhe Yang, Runbo Cai, Yakun Ge, Yang Bo
Journal of System Simulation
Abstract: Aiming at the burr phenomenon and skeleton redundancy in current image skeleton extraction, a method based on flood-fill is proposed. The target image is pre-processed to obtain a threshold binary image and the foreground and background are segmented. A mask image and axis map are constructed to provide data sources and judgment basis for the subsequent calculation process. The diffusing water process is simulated by traversing the horizontal grayscale histogram. The foreground contour of the mask image is shrinked. According to the change of the connected components of the neighborhood, a skeleton feature point is determined . When …
An Evacuation Simulation Method Based On Disaster Avoidance Psychology And Disaster Impact,
2020
School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230009, China;
An Evacuation Simulation Method Based On Disaster Avoidance Psychology And Disaster Impact, Zhang Han, Liping Zheng, Huang Kang, Haibo Lin
Journal of System Simulation
Abstract: Evacuating people safely and efficiently during disasters is the important guarantee to public safety, and the effective and feasible evacuation simulation method is theoretically and practically significant. The main methods seldom consider the dynamic evolution of disasters, so a dynamic Evacuation Route Replanning Based on Psychology (DERR) method is proposed. DERR method focuses on the psychological parameters of disaster avoidance of people. According to the change of disasters area, DERR can perform the real time evacuation process by using A* routing algorithm to re-plan and optimize the evacuation path. The simulation experiment shows the evacuation process of this method. …
Structure Learning Of Fuzzy-Tree Based On Rigorous Binary Tree Code And Genetic Algorithm,
2020
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;;2. School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China;
Structure Learning Of Fuzzy-Tree Based On Rigorous Binary Tree Code And Genetic Algorithm, Changliang Liu, Ziqi Wang
Journal of System Simulation
Abstract: To solve the problems of information redundancy and low optimization efficiency in the structure learning of fuzzy-tree model, a method based on rigorous binary tree code and genetic algorithm is proposed. The structure of fuzzy-tree model is coded by rigorous binary tree code, which improves the information redundancy of the existing matrix code. Considering the particularity of the code and the convergence of the algorithm, an improved genetic algorithm is proposed to optimize the structure of fuzzy-tree model. The experimental results show that the algorithm has good stability and computing speed on different data sets, and can find a …
Modeling And Simulation For Target Complex Trajectory Of Ballistic Missile,
2020
Air Force Early Warning Academy, Wuhan 430019, China;
Modeling And Simulation For Target Complex Trajectory Of Ballistic Missile, Jiawei Li, Jiang Jing, Chongyang Liu, Binbin Shi
Journal of System Simulation
Abstract: Aiming at the complexity and multi-phase process of the trajectory of target complex formed by ballistic missile in space, a phased modeling approach is proposed. Due to the differences of the motion characteristics at different phases, based on the phased modeling thought, the release model of coast decoy in symmetric release structure is established under the corresponding coordinate systems. Under the consideration of several factors: the number, mass, initial state, and vanishing condition, the generation process of multiple batches of boost debris trajectories is designed. The main target trajectory of ballistic missile, decoys release process and multiple batches of …
Dynamic Model Of Dual Flux-Controlled Memristor And Fpga Hardware Circuit Realization,
2020
School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
Dynamic Model Of Dual Flux-Controlled Memristor And Fpga Hardware Circuit Realization, Haoqi Chen, Xiaohong Zhang
Journal of System Simulation
Abstract: Based on the classical Chua’s chaotic circuit, a 5-Dimentional and dual flux-controlled memristive chaotic circuit system is designed. The nonlinear characteristics of the circuit are analyzed numerically and the results show that the circuit has rich chaotic dynamical behavior. The novel memristive continuous system is transformed into digital system by first-order discrete processing. Based on DSP Builder and FPGA technology, a hardware platform of Cyclone Ⅳ E series EP4CE10F17C8N chip realizes the digital system of the model. The design results indicate that the digital memristive system avoids the drift and instability of analog components, the display performance of the …
Credibility Assessment Of Fault Injection Simulation Based On Feature Selective Validation,
2020
School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China;
Credibility Assessment Of Fault Injection Simulation Based On Feature Selective Validation, Li Sheng, Yuxiao Li
Journal of System Simulation
Abstract: Aiming at the complexity and large number feature details of the data of fault injection simulation which lead to the difficulty for the single indicators or expert visual assessment methods to obtain the accurate assessment results, and the evaluation expert giving the interval complementary judgment matrix on the basis of AHP method which lead to the difficulty for the weights of credibility indicators to be determined, a multi-indicator comprehensive credibility assessment model based on Feature Selection Verification (FSV) is proposed. It can calculate the quantitative credibility values and the qualitative credibility values of the credibility indicators. In order …
An Improved Particle Swarm Optimization Algorithm And Its Application In Clustering Analysis,
2020
1. Institute of Complex System and Advanced Control Northeast Petroleum University, Daqing 163318, China;;2. Heilongjiang Provincial Key Laboratory of Networking and Intelligent Control; Daqing 163318, China;;
An Improved Particle Swarm Optimization Algorithm And Its Application In Clustering Analysis, Chuang Wang, Zhang Yong, Xuegui Li, Hongli Dong
Journal of System Simulation
Abstract: In this paper, a novel artificial fish swarm particle swarm optimization algorithm (AF-PSO) is proposed corresponding to the shortcomings of the standard particle swarm algorithm including the fast convergence speed in the initial stage, the easiness to fall into premature convergence in the late, the local optimization and the poor ability to global search. This paper firstly introduces the crowding factorδ and the Markov chain, and then adds the artificial fish swarm algorithm to the particle swarm optimization algorithm. By calculating the crowding factor, the velocity model is updated to switch among four modes: foraging, clustering, following and random. …
Intelligent Effectiveness Evaluation And Optimization On Weapon System Of Systems Based On Deep Learning,
2020
1. School of Automation Science, Beihang University (BUAA), Beijing 100191, China;;
Intelligent Effectiveness Evaluation And Optimization On Weapon System Of Systems Based On Deep Learning, Li Ni, Yuhong Li, Guanghong Gong, Xiaodong Huang
Journal of System Simulation
Abstract: In the process of conventional WSoS (Weapon System of Systems) operational effectiveness evaluation, multiple complex steps including reconfiguring the scenario, rerunning the WSoS simulation system, and conducting effectiveness evaluation model calculations are taken. For the problems of conventional effectiveness evaluation method, such as the complex process and time-consuming, the intelligent evaluation method of WSoS combat effectiveness based on machine learning regression is proposed, and the optimization process of combat effectiveness based on evolutionary strategy is introduced. Taking the full connection depth regression network as the prediction model, the guiding selection principles of network hidden layer number and sample …
Research On Nodes Re-Optimization Of Microwave Relay Network,
2020
1. College of Information and Communication, National University of Defense Technology, Wuhan 430019, Chnia;;
Research On Nodes Re-Optimization Of Microwave Relay Network, Yunjun Lu, Kebin Chen, Mengyao Han, Yiqiao Jin
Journal of System Simulation
Abstract: The microwave relay network nodes are studied and the topology is optimized. Considering the link attenuation probability, node attraction coefficient and communication redundancy, the optimal link set is obtained by genetic algorithm with the idea of network topology optimization. By calculating the degree of each node in the optimal link set and sorting the node with the value of degree, the candidates of the trunk nodes are given. The microwave relay network topology given by the conventional method is optimized. The method has certain versatility. It can be applied to the selection of other network trunks and relay nodes …
Dynamic Equivalent Modeling And Simulation Of Wind Farm Based On Asw-Fcm Algorithm,
2020
1. Science & Technology College, North China Electric Power University, Baoding 071000, China;;2. College of Control and Computer Engineering, North China Electric Power University, Baoding 071000, China;
Dynamic Equivalent Modeling And Simulation Of Wind Farm Based On Asw-Fcm Algorithm, Mudan Li, Yinsong Wang
Journal of System Simulation
Abstract: A new dynamic equivalent modeling method is proposed for the wind farm of directly-driven wind turbine with permanent magnet synchronous generator (D-PMSG). The wake effect and wind direction change between multiple wind turbines are considered to calculate the effective input wind speed, the effective wind speed, rotor speed, pitch angle and output power are selected as the multi-group indicators after analyzing the wind turbine operating characteristics. Considering the differences and relevance of the operating conditions between the turbines, an adaptive sample weighting fuzzy C-means clustering algorithm (ASW-FCM) is designed to optimally cluster the wind farm. The clustered wind turbine …
Blind Image Quality Assessment Based On Natural Scene Statistics,
2020
1. Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, 100190, China;;2. University of Chinese Academy of Sciences, Beijing, 100049, China;
Blind Image Quality Assessment Based On Natural Scene Statistics, Haiyang Li, Weiguo Cao, Shirui Li, Kelu Tao, Li Hua
Journal of System Simulation
Abstract: Nowadays blind/referenceless image spatial quality evaluator (BRISQUE) based on natural scene statistics is one of the state-of-the-art no-reference algorithms. But it only analyzes the original image and ignores the difference of the features constructed. Here an improved algorithm BRISQUEs is proposed and implemented by three steps. First, we apply mean subtracted contrast normalized to the gradient images and construct a new feature vector to assess quality. Second, we weight some key features of BRISQUE to improve assessment. After the two assessments obtained, a further average is made to weaken the bias from different assessments. Through the experiments on the …
