Uncalibrated Visual Servoing Based On Kalman Filter Optimized By Spsa,
2019
Shanghai Key Laboratory of Power Station Automation Technology, School of Mechatronics and Automation, Shanghai University, Shanghai 200072, China;
Uncalibrated Visual Servoing Based On Kalman Filter Optimized By Spsa, Jinqiang Zhang, Xianxia Zhang
Journal of System Simulation
Abstract: Considering the problem of robot uncalibrated visual servoing, this paper presents a method for online estimation of image Jacobian matrix based on Kalman filter optimized by simultaneous perturbation stochastic approximation algorithm. This method takes the robot image Jacobian matrix as the system state, and uses Kalman filter to observe the system state. In order to improve the performance of the filter, the simultaneous perturbation stochastic approximation algorithm is used to optimize the filter parameters. This method is used to estimate the image Jacobian matrix and to design the control strategy, which can avoid complicated system calibration process. The simulation …
Construction And Application Of Low Altitude Multi-Path Simulation System Based On Volume Distributive Target Simulation,
2019
Science and Technology on Special System Simulation Laboratory, Beijing Simulation Center, Beijing 100854, China;
Construction And Application Of Low Altitude Multi-Path Simulation System Based On Volume Distributive Target Simulation, Xiaolei Wang, Baiting Liu, Chaolei Wang, Zhaowei Yang, Yuhui Tao
Journal of System Simulation
Abstract: With the continuous development of broadband high-resolution radar technology, the existing simulation technology cannot meet the needs of complex RF target and low altitude multi-path simulation with multi scattering center characteristics. The paper takes broadband high-resolution RF imaging guidance system as application background. A method for constructing a low altitude multi-path semi-physical simulation system based on volume distributive target simulation is put forward. The RF complex volume distributive target control model and low altitude multi-path simulation control model are developed. A hardware-in-the-loop system with low altitude multi-path simulation is constructed. The experimental results show that the simulation model …
Modeling And Simulation Of Pem Fuel Cell / Battery Hybrid Vehicle,
2019
1. Department of Automotive and Ship Engineering, Yantai Vocational College, Yantai 264670, China; ;
Modeling And Simulation Of Pem Fuel Cell / Battery Hybrid Vehicle, Guizhi Sun, Sam Park, Zhongling Lin
Journal of System Simulation
Abstract: This paper describes modeling of a hybrid power system that supplies energy to an electric vehicle based on a hybrid system that uses a proton exchange membrane (PEM) fuel cell as a primary energy source and a battery pack as an ancillary energy storage system. A threshold approach has been employed for power control. When the power required by the vehicle exceeds a threshold, the battery works with the fuel cell to satisfy the dynamic response of vehicle. Otherwise the fuel cell works alone with regenerative braking enabling recharging of battery capacity. The proposed model has been simulated and …
Human Action Recognition Based On Depth Image,
2019
1. Department of Computer Scince and Technology, Hefei University, Hefei 230601, China; ;
Human Action Recognition Based On Depth Image, Tang Chao, Miaohui Zhang, Li Wei, Cao Feng, Xiaofeng Wang, Xiaohong Tong
Journal of System Simulation
Abstract: Because of the complexity and non-rigidity of human actions, traditional human action recognition based on RGB video data is a very challenging research topic. According to some deficiencies of existing recognition method based on RGB video data, a novel human action recognition method is proposed based on depth image data. In this new method, the block mean feature in the depth difference motion historical image is fused with the Gabor feature as mixed features and then a rotation forest algorithm is used to model. The experimental results show that the proposed method is simple, fast and efficient compared …
Design And Research On Mechanism Model Of Cyclone,
2019
Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation, North China Electric Power University, Baoding 071003, China;
Design And Research On Mechanism Model Of Cyclone, Zhang Yue, Han Pu
Journal of System Simulation
Abstract: The operating characteristics of the cyclone separator greatly affect the overall operating efficiency of the boiler, the gas-solid two-phase flow in the cyclone separator is complicated by the vortex flow. The mathematical model of different angles has been too complicated or one-sided to show its running mechanism. A mechanism model of the internal parameters of a cone assembly and a counter current cyclone separator has been established. The three cutting diameter calculation methods have been compared for grade separation efficiency. The pressure drop has been combined with the pressure drop of the subdivision of the system structure, and the …
Research On Numerical Simulation Of Continuous Roll Forming Process Of Four-Roll Plate Bending Machines,
2019
School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
Research On Numerical Simulation Of Continuous Roll Forming Process Of Four-Roll Plate Bending Machines, Wang Yan, Xinqing Zhu, Jiefei Hu, Ximin Cui
Journal of System Simulation
Abstract: In order to improve the production process quality of four-roll plate bending machines, a four-roll bending mathematical model is established and a finite element simulation is used to verify its accuracy. The influence of side roller displacement, sheet thickness, and rotational speed on the radius and quality of the final shaped plate are analyzed. The simulation results show that as the displacement of side roll increases, the downtrend of the sheet forming radius gradually slows down and the quality of the formed sheet also decreases. Plastic strain fluctuation on plate surface decreases as the thickness increases, quality of thick …
Application Of Stochastic Petri-Net In Dynamic Evaluation Of Ecological Environmental Vulnerability In Mining Area,
2019
School of Management, Xi'an University of Architecture and Technology, Xi’an 710055, China;
Application Of Stochastic Petri-Net In Dynamic Evaluation Of Ecological Environmental Vulnerability In Mining Area, Guangqiu Huang, Quanchen Liu, Qiuqin Lu
Journal of System Simulation
Abstract: In order to establish the simulation model of vulnerable process of ecological environment in mining and evaluate ecological environment vulnerability dynamically, stochastic Petri-net (SPN) was adopted. The place set was divided into destruction state set, repair state set and virtual place set. Ways of representation and calculation method of these three types of places were given respectively. The state value of a place was to record actual change quantity of this place. The calculation of vulnerability was integrated into network system running naturally. Vulnerability algorithm based on SPN was given. In case study, a simplified SPN model …
Analysis Of Uas Avoidance Warning Criteria Based On "Τ-Τ",
2019
Department of Aircraft Control, Aviation University of Air Force, Changchun 130022, China;
Analysis Of Uas Avoidance Warning Criteria Based On "Τ-Τ", Zhiwei Zhang, Jianwu Tao, Shao Xiao
Journal of System Simulation
Abstract: In the process of UAV avoiding obstacles, the tau warning logic based on time is introduced. Based on the tau warning logic, the τ-τ warning logic is proposed, and the equal τ-τ warning curve is constructed. According to the range of maneuver of the own UAV, three warning areas are defined, including high-risk area, low-risk area and non-risk area. Aiming at the two planes in the case of parallel encounter and vertical encounter, in accordance with three different situations of the UAV’s speed greater than, equal to and less than the intruder’s speed, the method simulates the warning …
Cfd Based Analysis And Improvement Of The Flow Field Of Stirred Tank Reactor For Crystallization,
2019
School of Control Science and Engineering (SCSE), Dalian university of technology, Dalian 116024, China;
Cfd Based Analysis And Improvement Of The Flow Field Of Stirred Tank Reactor For Crystallization, Zewen Ma, Liu Tao, Xudong Sun
Journal of System Simulation
Abstract: The computational fluid dynamics (CFD) method is adopted to analyze the flow field of 1L stirred tank reactor for crystallization. A popular CFD software named FLUENT is used to analyze the influence of a single layer turbine agitator on the flow field in a stirred tank reactor. The standard turbulence model of k-ε is employed to simulate a three-dimensional single-phase flow field of water solution. Simulation studies indicate that the simulated flow field is consistent with real distribution of the flow field, while it is seen that uniform blending can be achieved in the lower and middle parts of …
Robust Fuzzy Adaptive Compensation Control Of Reconfigurable Manipulator,
2019
1. Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System, Tianjin 300384, China; ;
Robust Fuzzy Adaptive Compensation Control Of Reconfigurable Manipulator, Weimin Ge, Keke Yan, Xiaofeng Wang, Zengchang Liu
Journal of System Simulation
Abstract: Aiming at the uncertainty of the dynamics system of reconfigurable manipulator, a control law based on the fuzzy adaptive algorithm is proposed to adaptively approach the friction and external disturbance in the system, achieving the compensation control of the reconfigurable robot arm. At the same time, the robust items are added in the control law in order to improve the compensation precision and anti-interference performance of the control law, and reduce the approximation error of the algorithm. By Lyapunov stability theory, it is proved that the proposed fuzzy adaptive control law and the robust fuzzy adaptive control law can …
Online Modeling With Semi-Supervised Locally Weighted Partial Least Squares Based On Expectation Maximization Algorithm,
2019
1.School of Internet of Things Engineering, Institute of Automation, Jiangnan University, Wuxi 214122, China; ;2.Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education), Jiangnan University, Wuxi 214122, China;
Online Modeling With Semi-Supervised Locally Weighted Partial Least Squares Based On Expectation Maximization Algorithm, Weili Xiong, Mingchen Xue, Yanjun Li
Journal of System Simulation
Abstract: As only small proportion of labeled data can be obtained from chemical processes, an online soft sensing modeling method based on semi-supervised locally weighted partial least squares is proposed . The labeled and unlabeled historical data are accumulated to construct training database. The similarity between the newly measured data and the sample points in the database are calculated and used as the weight of each data point. The semi-supervised locally weighted partial least squares model is constructed, and the Expectation Maximization (EM) algorithm is employed to estimate the parameters of the model. Online prediction achieves simulation results of debutanizer …
Historical Data Modeling Based On State Observation,
2019
Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation(North China Electric Power University), Baoding 071003, China;
Historical Data Modeling Based On State Observation, Dong Ze, Erxin Yin
Journal of System Simulation
Abstract: Aiming at the problem that the conventional historical data modeling method can not overcome the influence of disturbance on modeling accuracy, a historical data modeling method based on state observation is proposed. In this method, the data with the characteristic from dynamic to steady state are selected from the historical data as the modeling data, which is subjected to zero initialization processing based on the final steady state value. The processed data is then divided into two segments. The first segment is used to track the state of the prediction model, and the final observed state is used as …
Facial Expression Recognition Based On Improved Dictionary Learning And Sparse Representation,
2019
1.School of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China; ;2.College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
Facial Expression Recognition Based On Improved Dictionary Learning And Sparse Representation, Li Ming, Xiujiao Peng, Wang Yan
Journal of System Simulation
Abstract: In order to overcome the problems induced by illumination andocclude in facial expression recognition and reduce the time required by sparse representation classification, the facial expression recognition algorithm withfusion of HOG feature and improved KC-FDDL dictionary learning sparserepresentation is put forward. Improved K-means cluster and Fisher discriminationdictionary learningis implemented on thetraining setgenerated by extracting HOG features of normalized expression image.Facial expression classification is conducted by thesparse representation with weighted residuals. Experimental results on the Cohn-Kanade databaseshow that this method is lower time-consumingand more accurate for similar facial expression classification than other facial expression classification methods.
Modeling And Simulation Of Difg Unit With Stator Inter-Turn Fault,
2019
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;
Modeling And Simulation Of Difg Unit With Stator Inter-Turn Fault, Boqiang Xu, Liling Sun, Wenjuan Du
Journal of System Simulation
Abstract: The mathematical model of doubly fed induction generator (DFIG) with stator inter-turn fault, which presents itself as standard form state space equation, is deduced and established, for the first time. The corresponding simulation model, i.e. Matlab S-function block is developed and embedded in a Matlab built-in routine simulating DFIG unit comprising wind turbine, converter, related mechanical/electrical control and DFIG. The simulation model of DFIG unit with stator inter-turn fault is established, which is a beneficial extension of Matlab simulation. The stability of DFIG unit under the healthy and faulty conditions is analyzed by using simulation. The results show …
Research And Application Of Damage Development Of Rock Mass With Complex Structure Under Horizontal Offset,
2019
1.College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, China; ;2.Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Fuxin 123000, China; ;3.Tunnel & Underground Structure Engineering Center of Liaoning, Dalian Jiaotong University, Dalian 116028, China; ;
Research And Application Of Damage Development Of Rock Mass With Complex Structure Under Horizontal Offset, Tiejun Cui, Shasha Li, Yundong Ma, Laigui Wang
Journal of System Simulation
Abstract: In order to understand the stress and strain of the complex overlying strata with horizontal offset in service time of mining, the model of the overburden mining regions is created by PFM with the simulation platform of PFC3D. The overlying strata contains five layers including intrusive igneous rock, of which the bottom rock has anticline and syncline structure due to tectonic stress. The stress and strain characteristics of the five layers of rock mass are analyzed. Studies show that it takes the compressive stress 379 years to penetrate the overlying strata. The strongest penetrate path of the compressive stress …
Method Of Power System Energy Storage Configuration Based On Flexibility Promotion,
2019
1.School of Optical-Electrical and Computer Engineering, University of Shanghai for Science & Technology, Shanghai 200093, China; ;
Method Of Power System Energy Storage Configuration Based On Flexibility Promotion, Weiqing Sun, Li Zhen, Yiming Tan, Fenglei Lü, Wenping Qiu, Hongzhong Li
Journal of System Simulation
Abstract: To solve the problem of renewable energy access and aiming at system’s response capability to short-term uncertainty, power system flexibility and its evaluation index are defined. A method of energy storage configuration based on flexibility evaluation is proposed. The uncertainty from power supply is analyzed. Aiming at the uncertainty of renewable energy, a source flexibility evaluation index is defined. The principle and method of energy storage configuration are presented from the aspect of siting and sizing. The energy storage configuration model is created and solved considering both the system flexibility requirements and energy storage costs based on the …
Optimization Design Of Fuzzy Energy Management For Plug-In Hybrid Electric Vehicles,
2019
1.School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; ;
Optimization Design Of Fuzzy Energy Management For Plug-In Hybrid Electric Vehicles, Xiaolan Wu, Zhifeng Bai, Xiaohui Shi, Binggang Cao
Journal of System Simulation
Abstract: Because of complex system configuration, it is difficult to find precise mathematics model of PHEV drivetrain. The fuzzy controller design depends mainly on expert’s experience and has much subjectivity. A fuzzy energy management strategy (EMS) based on particle swarm optimization (PSO) is presented. In this EMS, the fuzzy rules obtained from expert knowledge are unaltered and the PSO is used to optimize the parameters of membership functions of the fuzzy controller. The provided EMS model is built by Matlab/simulink and embedded in the Advisor software for simulation and comparative analysis. The result shows that, compared with the conventional …
Apriori-Based Association Rule Algorithm And Its Application In Power Plant,
2019
1.School of Mechatronical Engineering and Automation, Shanghai University, Shanghai 200072, China; ;
Apriori-Based Association Rule Algorithm And Its Application In Power Plant, Wencheng Huang, Jia Li, Daogang Peng, Li Wang
Journal of System Simulation
Abstract: The data mining technology for historical data of power plant has the problem of low efficiency as the data dimension is high and data size is large. Some parameters are set without theoretical guidance and the objective parameter value is not reasonably determined in the corresponding algorithm of data mining. A mining algorithm with improved quantitative association rule based on Apriori is proposed. Aiming at the economical operation of power plant, target guidance is used to constrain the dimension and compress the quantity in sample space, which improves the mining efficiency and determines the parameter’s target value reasonably. …
Application Of Pwa-Based Safety Diagnosis Method In Cstr System,
2019
College of Information and Control Engineering, China University of Petroleum (East China), Qingdao 266580, China;
Application Of Pwa-Based Safety Diagnosis Method In Cstr System, Yuhong Wang, Yang Pu
Journal of System Simulation
Abstract: A safety diagnosis method based on piecewise affine (PWA) model is proposed for ensuring the safety of the petrochemical process. In the method, the petrochemical system is modeled in PWA form which can well describe the nonlinear and hybrid characteristic of the system. Then a formal verification algorithm based on reachable analysis is used to get reachable sets of system states according to the established model. It can predict whether the system is in danger or not in advance so as to take the corresponding measures to ensure the reliability and safety of the system. The proposed method is …
Unsteady State Diffusion Of Pollutants During Cargo Compartment Fire,
2019
1.State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China; ;
Unsteady State Diffusion Of Pollutants During Cargo Compartment Fire, Yang Dong, Liu Zhen, Shibin Yang, Xiaozhe Sun
Journal of System Simulation
Abstract: The transport of the pollutant gas and smoke in aircraft cargo compartment is investigated numerically on the occurrence of fire disaster. The analysis model based on the volume fire source is established. The 3D unsteady Navier-Stokes equations and transport equations are solved using finite-volume method. The distribution of the temperature is achieved and the unsteady transport principle of pollutant gases and the smoke is analyzed. Numerical results match well with the experiments results, which verifies the correctness of the numerical method. Results show that the ceiling spray behavior is observed when the thermal air is driven by the buoyancy …
