Study On Effect Of Neglecting Transient Terms Of Momentum Equations On Simulation Models Of Single Phase Heated Tubes,
2020
1. College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China; ;2. Shanghai Engineering Research Center of Intelligent Management and Control for Power Process, Shanghai 200090, China;
Study On Effect Of Neglecting Transient Terms Of Momentum Equations On Simulation Models Of Single Phase Heated Tubes, Yingwei Kang, Yanan Wang, Daogang Peng, Pengyuan Zheng, Yang Ping
Journal of System Simulation
Abstract: A model of single phase heated tubes was presented, based on which the effect of neglecting transient terms of momentum equations on model performance was investigated by simulating a heated tube of the superheater of a power plant boiler. It is found that neglecting the transient terms of momentum equations can significantly decrease the dynamic accuracy of the model; under various step disturbances, neglecting the transient terms of momentum equations can speed up the dynamic response of the enthalpy-temperature channel of the model nearly 4 times; under the step disturbance of the inlet steam flux, neglecting the transient terms …
Surrogate Model Based Processor Architectural Design Space Exploration Algorithm,
2020
1. Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing 100190, China; ;2. Institute of Computing Technology,Chinese Academy of Sciences, Beijing 100190, China; ;3. University of Chinese Academy of Sciences, Beijing 100190, China;
Surrogate Model Based Processor Architectural Design Space Exploration Algorithm, Hongwei Wang, Ziyuan Zhu, Jinglin Shi, Yongtao Su, Hongmei Shi, Zhiguo Liu
Journal of System Simulation
Abstract: A novel surrogate model based penalty-distance multi-objective expected improvement (PDMOEI) algorithm was proposed for processor architectural design space exploration (DSE): first using a Kriging interpolation technique to construct a surrogate model, then adopting the surrogate model based PDMOEI algorithm to search the Pareto points and finding the globally multi-objective optimized architectural parameter configurations. The proposed algorithm was compared with the multi-objective expected improvement (MOEI) algorithm, the non-dominated sorting genetic algorithm II (NSGA-II) algorithm and the metamodel-assisted NSGA-II (MA-NSGA-II) algorithm by performing two experiments. Experimental results show that, the proposed algorithm achieves better Pareto points pursuing performance than …
Research On Semi-Active Control Strategy Of High Speed Railway Pantograph-Catenary System Based On Model Predictive Control,
2020
1. Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China; ;
Research On Semi-Active Control Strategy Of High Speed Railway Pantograph-Catenary System Based On Model Predictive Control, Zhiling Ren, Lin Dong, Wang Yue, Guangquan Zhang
Journal of System Simulation
Abstract: For the pantograph catenary coupling problem, the semi-active control strategy of pantograph catenary system was proposed. According to the established pantograph catenary model and the contact force history data, it used the MPC prediction technique to predict the next moment of contact force. The predicted value and the theoretical value error were calculated, and the MPC controller output the calculated results to the ER damper. The change of the control input of the contact force was provided by the current damper, which made the actual value close to the theoretical value. Experimental results show that the semi-active …
Efficient Resource Search Mechanism In Selfish Mobile Peer-To-Peer Network,
2020
1. Institute of Information, Hunan University of Humanities, Science and Technology, Loudi 417000, China; ;
Efficient Resource Search Mechanism In Selfish Mobile Peer-To-Peer Network, Liu Hao, Xuelong Zhang
Journal of System Simulation
Abstract: Because of the influence of node's own state and other factors, the node in mobile P2P network often shows the selfishness and resource preference, which greatly affects the resource search efficiency of the network system. Aiming at this problem, a novel resource search mechanism was proposed based cooperation degree of nodes in selfish mobile Peer-to-Peer network. In the search mechanism, through the comprehensive evaluation of the node's information forwarding rate, the overall similarity and the core degree, the node with the highest degree of cooperation was selected as the relay node for information forwarding. At the same time, through …
Analysis Of Static Equilibrium Workspace For Under-Constrainted Cable-Driven System With Multi-Robots,
2020
School of Mechatronic Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
Analysis Of Static Equilibrium Workspace For Under-Constrainted Cable-Driven System With Multi-Robots, Zhigang Zhao, Li Wei, Youde Li, Yanlin Wang, Ma Yan
Journal of System Simulation
Abstract: For the under-constrainted system that multi-robots tow the payload by cables, which does not meet the condition of force closure and equations are generally not compatible, so the accurate workspace can't be found out. The static equilibrium equation of the system was established, and then the least squares principle combined with the Monte-Carlo method was put forward. When the movement is low speed or quasi static for the payload, the approximate static equilibrium workspace can be found out quickly and the expression of the cable tension is given by using the normal equations and QR decomposition respectively. When position …
Modeling Approach For Predictive Maintenance Scheduling Model Based On Variable Conversion,
2020
No.36 Research Institute of CETC, Jiaxing 314033, China;
Modeling Approach For Predictive Maintenance Scheduling Model Based On Variable Conversion, Mingyi You
Journal of System Simulation
Abstract: A modeling approach for predictive maintenance (PdM) scheduling model based on decision variable conversion was proposed. Based on the proposed approach, a PdM scheduling model could be established by replacing the time decision variable in the corresponding classical time-based preventive maintenance (PM) scheduling model with product condition variable(s) and checking the correlation of the model parameters, maintenance effect and maintenance constraints with product condition. Based on the proposed modeling approach, the application case study considered an unreported predictive maintenance model in which system benefit was correlated with its condition. The proposed approach used the existing PM scheduling …
Combination Model Of Network Security Situation Prediction Based On Cooperative Games,
2020
Department of Computer Engineering, Dongguan Polytechnic, Dongguan 523808, China;
Combination Model Of Network Security Situation Prediction Based On Cooperative Games, Ke Gang
Journal of System Simulation
Abstract: Influenced by a variety of complicated factors, the network security situation has many characteristics, such as highly nonlinear, time-varying, and mutant. It is difficult to predict accurately with a single prediction method. In response to this shortage, a new combined prediction model for network security situation was proposed based on cooperation policy theory. The network security situation was predicted respectively by using the Elman neural network model, GM(1,1)model, support vector machine (SVM) mode. The Shapley value method of cooperative games was applied to determine the weight of each single prediction model, and the prediction results were weighted calculated to …
Modeling And Simulation Of Hvdc Systems By Three-Phase Dynamic Phasor,
2020
North China Electric Power University (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources), Changping District, Beijing 102206, China;
Modeling And Simulation Of Hvdc Systems By Three-Phase Dynamic Phasor, Yunhao Zhao, Chongru Liu, Gengyin Li, Feilong Yun
Journal of System Simulation
Abstract: A three-phase dynamic phasor (TPDP) model of High Voltage Direct Current (HVDC) systems was proposed. The proposed model could rapidly solve the dynamic characteristics of HVDC systems for AC system symmetrical and asymmetrical operating conditions. Switch functions model of converter was enhanced according to commutation process analysis of the converter. Due to the frequency characteristics analysis results, the TPDP model of HVDC systems with the converter, DC line and controller were established through dynamic phasor theory. Simulation results show that the proposed model is effective and acceptable..
Forestry Fire Spatial Diffusion Model Based On Integration Of Multi-Agent Algorithm With Cellular Automata,
2020
Institute of Disaster Prevention Science and Safety Technology, Central South University, Changsha 410075, China;
Forestry Fire Spatial Diffusion Model Based On Integration Of Multi-Agent Algorithm With Cellular Automata, Zhao Di, Zhisheng Xu
Journal of System Simulation
Abstract: In view of the existing ultrasonic detection signal attenuation, directional difference, complex propagation paths, and characteristics of the components of complex, a kind of intelligent concrete defect nondestructive detection algorithm based on multi resolution singular entropy was put forward. By using the wavelet algorithm, the ultrasonic signal was decomposed into high, low frequency components of multi scales for each component, then each component was decomposed by singular spectrum analysis, at the same time using the information entropy theory, the calculation of singular entropy as the characteristic defect detection value, using the GA-SVM algorithm was used to train the singular …
Research On Simulation Of Emergency Evacuation Guidance Under Biochemical Terror Attacks,
2020
University of Chinese Academy of Sciences, College of Engineering and Sciences, Beijing 100049, China;
Research On Simulation Of Emergency Evacuation Guidance Under Biochemical Terror Attacks, Sui Jie, Shengjie Long
Journal of System Simulation
Abstract: Biochemical terror attacks can cause numerous casualties, especially when it happens in public places such as subway station, which is densely populated, sealed, and complex in topography. And evacuating guidance plays an important role in reducing casualties. A guidance scheme was established based on both evacuating empirical formula and passengers escaping rules, according to evacuation problems in subway station. Meanwhile, the different features of passengers and their behaviors under attack were analyzed, as well as their impacts on evacuation. By simulating various evacuation situations based on social force simulation model, the importance of environmental features and passengers features in …
Analysis And Design Of Lfc System With Governor Dead-Band Via Generalized Active Disturbance Rejection Control,
2020
School of Control & Computer Engineering, North China Electric Power University, Beijing 102206, China;
Analysis And Design Of Lfc System With Governor Dead-Band Via Generalized Active Disturbance Rejection Control, Shuaibing Chang, Tan Wen, Zhiyong Zeng
Journal of System Simulation
Abstract: To eliminate the effect of the governor dead-band nonlinearities and guarantee the system stability, for load frequency control (LFC) of power systems with governor dead-band nonlinearity, the active disturbance rejection control (ADRC) was adopted, and the effectiveness of the control method was verified through the describing function method. A linearized method of dead-band was proposed, and the generalized active disturbance rejection control (GADRC) was adopted. Further, an error compensation scheme was proposed to eliminate the dead-band nonlinearities effectively. Simulation results show that the proposed error compensation scheme can eliminate the dead-band nonlinearity effectively and guarantee the control performance of …
System Modeling And Simulation For Cylinder Controlled By Servo Valve Of Hydraulic Looper In Hot Strip Mills,
2020
1. Equipment Maintenance Plant, WISCO, Wuhan 430080, China; ;
System Modeling And Simulation For Cylinder Controlled By Servo Valve Of Hydraulic Looper In Hot Strip Mills, Guilin Tao, Weigang Li
Journal of System Simulation
Abstract: Starting from the flow characteristics of cylinder controlled by servo valve of hydraulic looper in hot strip mills, a new mathematic model for hydraulic cylinder controlled by servo valve was established by analyzing and deducing the flow characteristics of two chambers of hydraulic cylinder. The model is different from the traditional equivalent model of “load-pressure flux”, and it is adaptable to many structural forms such as symmetric cylinder, asymmetric cylinder and piston cylinder. The simplified equivalent model was deduced by the simplified method of automatic control principles. The simulation experiments were carried out on a practical cylinder controlled …
Trajectory Optimization And Tracking Controller Based On Gauss Pseudo Spectral Method For Hypersonic Vehicle,
2020
Shanghai Aircraft Design and Research Institute, Shanghai 201210, China;
Trajectory Optimization And Tracking Controller Based On Gauss Pseudo Spectral Method For Hypersonic Vehicle, Tao Chao
Journal of System Simulation
Abstract: For a complex nonlinear mass dynamic model in the ascent stage for a hypersonic vehicle with multiple constrains including state constrains, control constrains, boundary constrains and path constrains, a trajectory optimization methodology based on Gauss Pseudo Spectral was proposed for the hypersonic vehicle. The optimal controller of the trajectory optimization results was chosen as the reference command. For the rigid body dynamics of the hypersonic vehicle, a nonlinear dynamic inverse control combined with PD control methodology was proposed to track the reference command. The simulation results demonstrate that, for the minimum fuel consuming trajectory optimization of the ascent …
Model For Multi-Area Interaction Control Based On User Strategy,
2020
PLA Information Engineering University, Zhengzhou 450004, China;
Model For Multi-Area Interaction Control Based On User Strategy, Gong Bi, Bin Yu
Journal of System Simulation
Abstract: To solve the problem of multi-area interaction, a model based on user strategy was established. The structure of model was proposed according to security area and user strategy, and transfer path and relevant concept were put forward. The model was instantiated based on portable storage device, the multi-area interaction scene was set up, and the interaction controller structure was designed. Experiments were set up to simulate the host read/write memory process. By judging the host's read/write jurisdiction to memory partition and whether the transfer path can be arrived, the experimental results show that the model can realize interaction control …
Coordinated Simulation Of Emg Prosthetic Hand Based On Matlab And Adams,
2020
1. College of Automation, Harbin University of Science and Technology, Harbin 150080, China; ;
Coordinated Simulation Of Emg Prosthetic Hand Based On Matlab And Adams, You Bo, Shoutong Tao, Huang Ling, Bojun Li, Hanqing Zhao
Journal of System Simulation
Abstract: In order to reduce the costs and expense during prosthetic hand research process, a simulation system of prosthetic hand was built by using the virtual technology. Building the multi-DOF prototype model of prosthetic hand with virtual modeling software Pro/E, the model was imported into software ADAMS to verifying the feasibility of prosthetic hand kinematic simulation. Through the interface modular part (ADAMS /control) of MATLAB and ADAMS, using Simulink module of MATLAB software built the prosthetic hand model control system of EMG (electromyography), changing the model information of the corresponding hand movements into actual expected angel of prosthetic hand joints. …
Multi-Agent Based Modelling And Simulation For Understanding Tempo-Spatial Patterns Of Surgery Wait Times,
2020
Department of Computer and Information Science, Southwest University, Chongqing 400715, China;
Multi-Agent Based Modelling And Simulation For Understanding Tempo-Spatial Patterns Of Surgery Wait Times, Tao Li, Luo Liang, Zili Zhang, Lai Hong, Fuyuan Xiao
Journal of System Simulation
Abstract: In order to characterize the self-organized tempo-spatial patterns of wait times in a healthcare service system, a multi-agent cardiac surgery service model (MA-CSS model) was proposed based on the multi-agent modeling within the context of cardiac surgery services. This model pays a special attention to how patients' and hospitals' behaviors and interactions affect the dynamics and relevant patterns of wait times with respect to some key factors, such as geographic accessibility to services, hospital resourcefulness, and wait times. By experimenting with the MA-CSS model, it was observed that certain regularities in wait times emerged from the simulation, which were …
Application Of Chirp Signal In Underwater Acoustic Supervision System For Illegal Throwing Sand Behavior Detection,
2020
1. Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, School of Information Science and Technology, Xiamen University, Xiamen 361005, China; ;
Application Of Chirp Signal In Underwater Acoustic Supervision System For Illegal Throwing Sand Behavior Detection, Zhangting Zhong, Yuan Fei, Jiale Wang, En Cheng
Journal of System Simulation
Abstract: To find an efficient and convenient method to determine whether a dredging is illegal is a very meaningful research content. A method of detection of throwing sand behavior based on Chirp signal was studied and three implementation schemes (subsection FFT fast correlation), FRFT and DeChirp were designed. The feasibility of the three schemes was verified by Wu Yuan Bay experiment and the simulation results. Anti-multipath and anti-noise performance of FRFT transform is the best. The performance of dechirp is the worst. Through the analysis, it comes out the conclusion: when the multipath effect is serious, FRFT algorithm …
Redevelopment Of Fuel Cell Ground Vehicle Simulation Model Based On Advisor Software,
2020
1. School of Mechanical Engineering, Nan tong University, Nantong 226019, China; ;
Redevelopment Of Fuel Cell Ground Vehicle Simulation Model Based On Advisor Software, Mingyu Huang, Zhang Zheng, Jiawen Deng, Qiongye Lu, Hongjun Ni, Yidan Zhou
Journal of System Simulation
Abstract: Vehicle simulation software ADVISOR does not set a vehicle model and driving cycles which can be used to simulate ground vehicle. The fuel cell vehicle model was redeveloped in the software including changed parts parameters and driving cycles according the actual vehicles. The fault of battery control part and fuel cell power output limit part in the default control strategy was analyzed and modified. Through simulating, the results show that the redeveloped vehicle model can simulate on new driving cycles and control strategy is more reasonable. The verification module for control effects of the control strategy was set …
Dynamics Analysis And Intelligent Prediction Of Aquaculture Data,
2020
1. College of Information Science and Technology, Hainan University, Haikou 570228, China; ;
Dynamics Analysis And Intelligent Prediction Of Aquaculture Data, Jiezhuo Zhong, Zhigang Tu, Wencai Du, Wu Wei
Journal of System Simulation
Abstract: Data analysis on environmental factors data is crucial to aquaculture, in which three significant parameters were discussed, they are temperature, PH and dissolved oxygen. Fixing some missing data and inaccurate records in the sampling process by high-order curve fitting. Meanwhile, the use of filtering method was adopted to divide systematic errors and rhythms inside parameters. Analysis from different water layers and different time suited the true environment well, which provided effective references for engineering problems. Radial Basis Function Neural Networks was well applied in tracking the parameters trend both globally and locally.
Real-Time Scheduling Algorithm Of Dynamic With Fault-Tolerant In Heterogeneous Distributed Systems,
2020
1. Dongguan Polytechnic, Dongguan 523808, China; ;
Real-Time Scheduling Algorithm Of Dynamic With Fault-Tolerant In Heterogeneous Distributed Systems, Chongjie Dong, Yuqiang Chen
Journal of System Simulation
Abstract: The traditional heterogeneous distributed real-time scheduling algorithm didn't give consideration to the dynamic behavior of tasks. An aperiodic non-preemptible and heterogeneous distributed dynamic fault-tolerant model and presenting two fault-tolerant scheduling algorithms was proposed based on this model: DRFSA algorithm and DSFSA algorithm. DRFSA(Dynamic and Reliability-driven of hybrid with Fault-tolerant Scheduling Algorithm)algorithm is to improve the system reliability as the scheduling objective through the reasonable scheduling. DSFSA (Dynamic and Schedulability-driven of hybrid with Fault-tolerant Scheduling Algorithm) algorithm is to improve schedulability as the scheduling objective and tries to enhance the schedulability through less task execution time. Both algorithms can dispatch …
