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 …
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 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 …
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 …
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. …
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.
Embedded Real Time Network Multimedia Data Transmission Method,
2020
The College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000, China;
Embedded Real Time Network Multimedia Data Transmission Method, Zaijian Wang, Ting Wan, Dandan Wu, Qingqing Xing
Journal of System Simulation
Abstract: To improve the speed of data acquisition and real-time video transmission, Filed Programmable Gate Array (FPGA) as the core processor, the Verilog HDL was used to describe the circuit function realization to realize the high-speed access of Synchronous Dynamic Random Access Memory (SDRAM) based on a typical network real-time transmission network multimedia service data. The new high-speed real-time transmission of video data took full advantage of the characteristics of FPGA parallel processing to improve video data acquisition and transmission rates. The experimental results demonstrate the effectiveness of the method.
Wormhole Attack Detection Scheme Design In Zigbee Network,
2020
1. PLA Information Engineering University, Zhengzhou 450004, China; ;
Wormhole Attack Detection Scheme Design In Zigbee Network, Yanqing Shi, Chen Wei, Bin Yu
Journal of System Simulation
Abstract: Wormhole attacks destroy the network topology, routing discovery and resource allocation in ZigBee network. A wormhole attack detection scheme was proposed, based on the definition of wormhole node, explicit wormhole node and implicit wormhole node. The scheme marked wormhole nodes by judging the matching between neighborhood and communication radius. On this basis, the scheme designed a type recognition mechanism of wormhole nodes. Safety analysis and experiment results show that the scheme detects wormhole attacks effectively with low communication overhead and computation cost.
Research On Power/Electrical Integrated Simulation Platform Of Nuclear Power Plant Based On Pscad,
2020
1. Shenyang Institute of Engineering, Institute of Electric Power, Shenyang 110136, China; ;
Research On Power/Electrical Integrated Simulation Platform Of Nuclear Power Plant Based On Pscad, Ye Peng, Qin Wei, Teng Yun, Yaoning Hu
Journal of System Simulation
Abstract: Nuclear power plant (NPP) has the characteristics such as complex internally operation, being sensitive to power network changing and large mathematical models. According to electromagnetic transient simulation platform PSCAD, an integrative simulation platform was established to reflect power regulation characteristic in the power section of nuclear power plant (NPP) and the dynamic operation conditions when NPP was incorporated into power system. With the powerful dynamic control ability and abundant library elements of PSCAD, simulation results proved the power regulation capability in NPP. Disturbed capability analysis of NPP was made during the load-following process after NPP merges into power grid, …
Research On Panoramic Image Mosaic Method Based On Camera Calibration,
2020
1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450052, China; ;
Research On Panoramic Image Mosaic Method Based On Camera Calibration, Jialin Ma, Jinming Zhang, Weixin Sun
Journal of System Simulation
Abstract: A panoramic mosaic method was proposed based on camera calibration, geometric distortion correction and rotation transformation processing was done for stitching image, in order to improve the accuracy of image registration and panorama stitching quality. The homography was acquired by calculating the camera linear calibration, and the inside and outside parameters of the homography were separated. The radial distortion of the image was calculated by the inside parameters, and the image geometric distortion was corrected; a sequence of images was transformed in the same world coordinates using the external parameters; image registration was achieved accurately though the same name …
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 …
Fractional Modeling And Simulation Analysis Of Single-Phase Pwm Rectifier,
2020
School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China;
Fractional Modeling And Simulation Analysis Of Single-Phase Pwm Rectifier, Zheng Zheng, Fangjun Ma, Yanfang Wei
Journal of System Simulation
Abstract: The modeling problem of single-phase PWM rectifier was studied, based on the fact that actual capacitance and inductance is the fractional in nature. The mathematical model of single-phase PWM rectifier was established by using fractional calculus theory, based on modeling method analysis of fractional Caputo definition and PWM rectifier topology. According to instantaneous power theory, for DC component value, the peak to peak value AC component, and the time of dynamic response of the DC side capacitor voltage were analyzed. In theory, DC component value does not change with the order number capacitance, while the AC component is opposite, …
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 …
Frequency Diverse Array Radar For Range-Angle Estimation Based On Difference Co-Array,
2020
1. College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China; ;
Frequency Diverse Array Radar For Range-Angle Estimation Based On Difference Co-Array, Huang Ling, Zhiming He, Li Xiang, Yang Fan
Journal of System Simulation
Abstract: Because of the coupling in range and angle responses, which could not estimate directly both the range and angle information of a target, a sub-array scheme of distance-angle joint estimation of a target for frequency diverse array (FDA) radar was proposed. The entire array was divided into two subarrays, which employed two different frequency offsets. For aperture extension, each subarray adopted difference co-array structure to provide O(N2)degrees of freedom by only N physical sensors when the second-order statistics of the received data was used. Therefore, the targets range and angle could be estimated directly …
E-Learner's Emotion Regulation Model With Undirected Gaussian Graphical Model,
2020
1. Center of Network and Information Technology, Xinjiang University, Urumqi 830046, China; ;2. Xinjiang Laboratory of Multi-Language Infornation Technology, Xinjiang University, Urumqi 830046, China; ;
E-Learner's Emotion Regulation Model With Undirected Gaussian Graphical Model, Jiwei Qin, Turgun· Ibragim, Huiguo Zhang
Journal of System Simulation
Abstract: Based on the absence of emotion in the background, e-Learner's emotion regulation model with simple variable can't fit the sparse and complex data in e-Learning, an e-Learner's emotion regulation model was proposed by Undirected Gaussian Graphical Model, which emphasized on many kinds of factor influences in emotion regulation. Correlation analysis, statistics, Gaussian undirected graph model fit the data to understand the relationship between data variables by using Chow-Liu algorithm, which searched for the smallest BIC forests and built e-learner's emotion regulation model based on the e-Learner's log. This model gives a basis for emotion regulation in e-Learning.
