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Research On Sparse Grid Non-Uniformity Correction Technologies For Infrared Imaging Resistor Array, Huijie Du, Hongming Zhao, Yu Hong, Gao Yang, Zhang Yi 2020 Science and Technology on Space System Simulation Laboratory, Beijing Simulation Center, Beijing 100854, China;

Research On Sparse Grid Non-Uniformity Correction Technologies For Infrared Imaging Resistor Array, Huijie Du, Hongming Zhao, Yu Hong, Gao Yang, Zhang Yi

Journal of System Simulation

Abstract: The non-uniformity characteristic is the crucial factors affecting the image quality projected by infrared imaging resistor array, and which affects the fidelity of the infrared scene simulation. The non-uniformity characters of the infrared imaging simulation resistor array were analyzed based on measured data; the sparse grid and the flood non-uniformity correction technologies were investigated and analyzed and based on the existing measuring technology the improved sparse grid method for engineering was proposed. Through measuring the non-uniformity data, establishing the linear look-up table and correcting the non-uniformity image, the non-uniformity correction algorithm was developed and validated. The result shows …


Evaluation Of Anti-Multipath Performance To Satellite Navigation Signal Tracking On L1/E1/B1 Frequency Band, Mao Hu, Dewei Wu 2020 School of Information and Navigation, Air Force engineering University, Xi'an 710077, China;

Evaluation Of Anti-Multipath Performance To Satellite Navigation Signal Tracking On L1/E1/B1 Frequency Band, Mao Hu, Dewei Wu

Journal of System Simulation

Abstract: Aiming at analysis requirement to anti-multipath performance of satellite navigation signal system, on the basis of expounding modulation types of latest navigation signal system on L1/E1/B1(1575.42MHz) frequency band, the analytical expressions of code tracking multipath error envelope and carrier phase multipath error based non-coherent early minus late process discriminator and arctangent discriminator was deduced respectively, the effect of receiver correlation distance, receiver front-end bandwidth and navigation signal modulation types to multipath error were analyzed through simulation. The results show that B1-C open service signal of BDS should adopt MBOC(6,1,1/11) modulation of similarly Galileo E1OS combination mode, and B1 …


Optimization Simulation For Job-Shop Scheduling For Reducing Manufacturing Energy Consumption, Xiaoxia Li, Xiaomao Huang, Jianxiao Liu, Liu Feng 2020 1. College of Information, Huazhong Agricultural University, Wuhan 430070, China;;

Optimization Simulation For Job-Shop Scheduling For Reducing Manufacturing Energy Consumption, Xiaoxia Li, Xiaomao Huang, Jianxiao Liu, Liu Feng

Journal of System Simulation

Abstract: To reduce the energy consumption in the manufacturing process by optimizing job-shop scheduling, the process of the machines' energy consumption was divided into different stages. The energy consumption of each stage was analyzed and modeled. The job-shop scheduling problem model for manufacturing energy consumption was developed. On the basis of the developed problem model, minimizing manufacturing energy consumption was used as the optimization goal and a simulated annealing algorithm was adopted to optimize the job-shop scheduling. A job scheduling scheme was generated randomly according to the coding rule. The job scheduling scheme generated randomly was used as the initial …


Simulation Contrast Analysis On Rigid And Flexible Movements Of Multi-Fins Coordinated Propulsion Mode, Xie Ou, Boquan Li, Yan Qin 2020 1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China;;2. School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;

Simulation Contrast Analysis On Rigid And Flexible Movements Of Multi-Fins Coordinated Propulsion Mode, Xie Ou, Boquan Li, Yan Qin

Journal of System Simulation

Abstract: A novel type of bionic underwater hybrid propulsion mode was proposed. By the means of the coordination control of the multi-fins, a propulsion mode combines the undulation propulsion of fish and the jet propulsion of jellyfish was developed, and was capable of achieving a serial of motions: undulating, jetting, turning, submerging, emerging and braking. The rigid and flexible water stabilizer kinematics model was established and the numerical simulation was performed for undulation and jet propulsion mode of the rigid and flexible water stabilizer by using a CFD method. The simulation results show that the dynamic characteristics and swimming performance …


Queuing System Simulation Optimization Of Subway Stair Width, Yangsheng Jiang, Juanxiu Zhu, Hu Lu, Shifan Han 2020 1. School ofTransportation and Logistics, Southwest Jiaotong University, Chengdu 610031, Sichuan, China;;2. Key Laboratory of Comprehensive Transportation of Sichuan Province, Chengdu 610031, Sichuan, China;;3. National United Engineering Laboratory of Integrated and Intelligent Transportation, Chengdu 610031, Sichuan, China;

Queuing System Simulation Optimization Of Subway Stair Width, Yangsheng Jiang, Juanxiu Zhu, Hu Lu, Shifan Han

Journal of System Simulation

Abstract: Subway stair and passenger flow are described as a G/G(n, φ)/C/C state-dependent queuing system with a general random arrival interval and the general random service time that depends on the passengers number n and stair gradient φ. Simulation model of the queuing system was designed and optimization algorithm was developed. Thus, a new optimization method based on queuing system simulation for subway stair width was proposed. The simulation optimization method, the M/G(n)/C/C, and the D/D/1/C queuing model (the existing design code) were compared. The results show that: the stair widths of …


Stochastic Resonance In Time-Delayed Asymmetric Monostable System With Stable Noise, Shangbin Jiao, Li Jia, Zhang Qing, Xie Guo 2020 School of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China;

Stochastic Resonance In Time-Delayed Asymmetric Monostable System With Stable Noise, Shangbin Jiao, Li Jia, Zhang Qing, Xie Guo

Journal of System Simulation

Abstract: α stable noise with monostable system was combined to investigate the stochastic resonance of the asymmetric monostable with time delay or not driven by different stable noise. The numerical simulation study shows that the stochastic resonance exists not only in the asymmetric monostable system but also in the time-delayed asymmetric monostable system. The effects of the stability index α (0<α≤2) and symmetric parameter β(-1≤β≤1) of α stable noise, the monostable system parameter α, the amplification factor D of multiplicative stable noise, the asymmetry parameter r and the time delay on the signal-to-noise ratio gain of the system were explored.


Image Classification Based On Mixed Deep Learning Model Transfer Learning, Xiangbin Shi, Xuejian Fang, Deyuan Zhang, Zhongqiang Guo 2020 1. Department of Computer, Shenyang Aerospace University, Shenyang 110136, China;;2. Liaoning General Aviation Key Laboratory, Shenyang Aerospace University, Shenyang 110136, China;;3. College of Information, Liaoning University, Shenyang 110036, China;

Image Classification Based On Mixed Deep Learning Model Transfer Learning, Xiangbin Shi, Xuejian Fang, Deyuan Zhang, Zhongqiang Guo

Journal of System Simulation

Abstract: In order to obtain high discrimination image representations in limited amount of datasets, the method based on mixed deep transfer learning model was proposed. When trained CNNs transferred to the target datasets, fully-connected layers were replaced by RBM layers. The method retrained the RBM layers and Softmax classifier, then fine-tuned the mixed model with backpropagation algorithm. The RBM layers not only fully connected whole feature maps, but also learned the target datasets' statistical features in the view of the biggest logarithmic likelihood, to eliminate the effects caused by the content differences between datasets. The experimental results show that the …


Boundary Conditions For Model Of Random Kelvin Cell Open-Cell Foam And Its Application On Open-Cell Aluminum Foam, Minju Qi, Guangfa Gao 2020 1. Department of Computer and Information Engineering, Huainan Normal University, Huainan 232001, China;;

Boundary Conditions For Model Of Random Kelvin Cell Open-Cell Foam And Its Application On Open-Cell Aluminum Foam, Minju Qi, Guangfa Gao

Journal of System Simulation

Abstract: The random Kelvin cell open-cell foam model, the further investigations on the boundary conditions of the model were carried out using the Python scripting language and the commercial code ABAQUS. The ‘floating' edges in boundary, owing to being cut with slanted planes, were eliminated. The compressive behaviors of the material under free boundary condition and fixed boundary condition were investigated and comparatively analyzed. On the basis of the above results, the periodic boundary condition was developed, and the method of setting the periodic boundary condition under several different conditions was discussed. The methodology for the design and implement for …


Processing Method Of Space Locations Of Virtual Human Based On Wavelet Transform And Kalman Filter, Liang Feng, Zhili Zhang, Xiangyang Li, Zhibo Tang 2020 State Key Discipline Laboratory of Armament Launch Theory and Technology, The Second Artillery Engineering University, Xi'an 710025, China;

Processing Method Of Space Locations Of Virtual Human Based On Wavelet Transform And Kalman Filter, Liang Feng, Zhili Zhang, Xiangyang Li, Zhibo Tang

Journal of System Simulation

Abstract: For the problem of inadequate smoothness of space location coordinate and large error of acceleration information, a processing method based on wavelet transform and Kalman filter was proposed to realize the valid control of virtual human' motion process after eliminating error points of motion data. Main acceleration information could be achieved based on the filter method of wavelet transform, and weak tracking Kalman filter was introduced to realize the amendment and smoothness of space location coordinates and acceleration information. Compared to the conventional Kalman filter method, the proposed method could achieve more exact and smooth space location and acceleration …


Path Planning And Control Simulation Of Unpowered Unmanned Aerial Vehicle (Uav) Returning To The Airport, Yijun Zhang, Yiqun Dong, Zhan Guang, Jianliang Ai 2020 1. Institute of Aircraft Design, Department of Mechanics and engineering science, Fudan University, Shanghai 200433, China;;

Path Planning And Control Simulation Of Unpowered Unmanned Aerial Vehicle (Uav) Returning To The Airport, Yijun Zhang, Yiqun Dong, Zhan Guang, Jianliang Ai

Journal of System Simulation

Abstract: The unpowered Unmanned Aerial Vehicle (UAV) return to the airport unpoweredly is a link of large risk and complex technology during the flight, and it is the key stage which affects the flight safety of the UAV. The basic control strategy and path planning of the unpowered UAV's back to the airport were studied, and the method which calculated the average drag of the return was proposed. Under the condition of multiple constraints, the flight control model of the UAV's return was established. It is proved that the result of the simulation is effective and has built a foundation …


Simulation Of Three Level Inverter Neutral Point Potential Control Based On Three Level Dc/Dc Converter, Kun Xia, Xiaodi Li, Xiaobo Ding, Yanneng Zeng, Yiming Wang, Xu Po 2020 1. University of Shanghai for Science and Technology, Shanghai 200093, China;;

Simulation Of Three Level Inverter Neutral Point Potential Control Based On Three Level Dc/Dc Converter, Kun Xia, Xiaodi Li, Xiaobo Ding, Yanneng Zeng, Yiming Wang, Xu Po

Journal of System Simulation

Abstract: The DC capacitor voltage unbalancing of NPC three-level inverter not only makes the AC output performance worse, but also reduces the DC capacitors' service life and even damages the power devices. A method based on three-level DC/DC converter was put forward to control the neutral point potential of three-level inverter. This method realized power conversion with three-level DC/DC converter topology, boosting voltage and stabilizing the neutral point potential of DC link at the same time. It would regulate switches working states according to the constraint rules on the sum of switches off time deciding bus voltage and the ratio …


Application Of Recursive Least Square Method In Identication Of Dehydrogenation Reator, Guoyou Li, Ningning Gao, Wenhua Xia 2020 Key Laboratory of Industrial Computer Control Engineering of Hebei Province, Yanshan University, Qinhuangdao, 066004, China;

Application Of Recursive Least Square Method In Identication Of Dehydrogenation Reator, Guoyou Li, Ningning Gao, Wenhua Xia

Journal of System Simulation

Abstract: The current production methods of styrene at home and abroad are mainly dhydrogenation of ethylbenzene which accounts for more than 90% of styrene production capacity in the world. To save energy, it was needed to optimize the system and its premise was to know the mathematical model of ethylbenzene dehydrogenation reactor. Due to the complexity of the reactor internal structure, mechanism modeling was more difficult to establish objective and accurate mathematics models. To solve this problem, it was used recursive least squares to conduct parameter identification. On the basis of actual plant data, ethylbenzene dehydrogenation reactor mathematical model was …


Simulation Research Of Maglev Train During Uphill And Downhill Process, Songqi Li, Kunlun Zhang, Guoqing Liu, Chen Yin 2020 Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education,Southwest Jiaotong University, Chengdu 610031, China;

Simulation Research Of Maglev Train During Uphill And Downhill Process, Songqi Li, Kunlun Zhang, Guoqing Liu, Chen Yin

Journal of System Simulation

Abstract: In the low speed EMS maglev test line experiments in Zhuzhou, it was found that vehicles are prone to hit the tracks, when the maglev train travels uphill or downhill through the tracks with slopes. This seriously affected the safety and comfort of the vehicle. In order to study the problem, a single low speed EMS maglev train carriages-track model with four degrees of freedom was built. It simulated and analyzed dynamic behaviors of the vehicle going uphill on different track curves, under different vehicle -track parameters. The simulation results show that the vehicle parameters, vehicle speed, and the …


Framework And Methodology For Logistics Simulation Based On Fidelity Theory, Yukun Liu, Fu Yu, Mengrui Shan 2020 1. School of Automation, Beijing University of Posts and Telecommunications, Beijing 100876, China;;

Framework And Methodology For Logistics Simulation Based On Fidelity Theory, Yukun Liu, Fu Yu, Mengrui Shan

Journal of System Simulation

Abstract: The quality issue of simulation was studied from the perspective of fidelity. The basic concepts and dimension structures of simulation fidelity and simulation utility were defined according to the features of discrete event logistics system (DELS) simulation after a relationship analysis between fidelity and problems in DELS simulation. A fidelity-based four-stage lifecycle framework with prescriptive contents for each stage was constructed to improve the quality of simulation implementation. A simulation fidelity management process model (FMPM) was built to ensure three processes: pre-control of fidelity design, in-process fidelity management, and afterward fidelity evaluation. Operable methods and tools such …


Design And Implementation Of Real Confrontation Oriented Simulation Models For Artillery Firepower, Baoyu Xu, Hongjun Zhang, Guo Hong, Guangming Xu 2020 1. College of Command Information Systems, PLA University of Science and Technology, Nanjing 210007, China;;2. PLA 65067 Force, Shenyang 110035, China;

Design And Implementation Of Real Confrontation Oriented Simulation Models For Artillery Firepower, Baoyu Xu, Hongjun Zhang, Guo Hong, Guangming Xu

Journal of System Simulation

Abstract: Aiming at the training requirement of real confrontation, a simulation method based on real equipment for artillery firepower was proposed on the basis of the analysis of artillery firepower attacking behavior characteristics. By comprehensive use of the sensor, exterior ballistic calculation, satellite positioning, geographic information and damage assessment technology, using a embedded simulation method, a simulation model of artillery firepower fused information collection of artillery firing data, ballistic endpoint simulation and damage assessment was built, which could reflect systematically and comprehensively artillery firepower attacking process and the result of the strike in the actual combat environment. The model …


Qos-Aware Scheduling For Data Intensive Workflow, Wan Cong, Cuirong Wang, Wang Cong 2020 College of Information Science and Engineering, Northeastern University, Shenyang 110004, China;

Qos-Aware Scheduling For Data Intensive Workflow, Wan Cong, Cuirong Wang, Wang Cong

Journal of System Simulation

Abstract: The development of technology enables people to access resources from different data centers. Resource management and scheduling of applications, such as workflow, that are deployed on the cloud computing environment have already become a hot spot. A QoS-aware scheduling algorithm for data intensive workflow on multiple data center environment was proposed. Scheduling data intensive workflow on multiple data center environment has two characteristics: A large amount of data is distributed in different geographical locations, the process of data migration will consume a large amount of time and bandwidth; secondly, the data centers have different price and resources. Data migration …


Analysis Of Rubber Conveyor Belt Sag Resistance Experiment Table Dynamics, Mao Jun, Wang Xin, Hongyue Chen 2020 College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China;

Analysis Of Rubber Conveyor Belt Sag Resistance Experiment Table Dynamics, Mao Jun, Wang Xin, Hongyue Chen

Journal of System Simulation

Abstract: To study the dynamic characteristics of rubber conveyor belt sag resistance bench working process, by hydraulic cylinder pressure, roll eccentricity error and st2000 conveyor belt thickness error as system incentive, a 3-DOF dynamics sag resistance test bench dynamic model was established. The model was solved by using Simulink. The results show that: as provided by the hydraulic cylinder pressure force of 10, 000 N, in the time domain, the vibration of the idler roller and pass roller slants big, which need to improve the connection stiffness. In the frequency domain, the excitation frequency and the natural frequency have larger …


Computational Investigation Into Thermal-Mechanical Coupling Characteristics Of Disc Brake Under Anti-Lock Braking Condition, Lijun Zhang, He Zhen, Dejian Meng 2020 School of Automotive Engineering, Tongji University, Shanghai 201804, China;

Computational Investigation Into Thermal-Mechanical Coupling Characteristics Of Disc Brake Under Anti-Lock Braking Condition, Lijun Zhang, He Zhen, Dejian Meng

Journal of System Simulation

Abstract: The braking condition has great influence on the thermal-mechanical coupling characteristics of disc brake. A three-degree-of-freedom dynamic model of braking vehicle was built. The braking force was determined by an anti-lock braking system (ABS) which adopted the threshold-logical control strategy of wheel slip rate. With the model, anti-lock braking processes on dry and wet were simulated. In the meantime, for the sake of comparison, non-anti-lock braking processes were simulated on corresponding road. A thermal-mechanical coupling finite element model of a ventilated disc brake was established. Thermal-mechanical coupling characteristics of brake disc and brake lining were calculated under different braking …


Study On Aircraft Scheduling Optimization Based On Improved Genetic Algorithm, Yaohua Li, Wang Lei 2020 Aeronautic Engineering College, Civil Aviation University of China, Tianjin 300300, China;

Study On Aircraft Scheduling Optimization Based On Improved Genetic Algorithm, Yaohua Li, Wang Lei

Journal of System Simulation

Abstract: Aircraft scheduling was studied, and an optimization model of aircraft assignment based on the objective function of maximize total profit was suggested. It considered its cost and benefits by combining fleet and aircraft. In the view of the feature of this model, the innovation of genetic algorithm chromosome was carried on, and these chromosomes formatted chromosome groups. The groups interior could cross over and mutate, and the probability of crossover and mutation could dynamically adjust in accordance with adaptive values to accelerate the convergence speed, the model was resolved fast in this way. In the process of simulation with …


Control Allocation Method For Split-Drag-Rudders With Asymmetrical Deflection, Xiaobo Qu, Weiguo Zhang, Jingping Shi 2020 School of Automation, Northwestern Polytechnical University, Xi'an 710072, China;

Control Allocation Method For Split-Drag-Rudders With Asymmetrical Deflection, Xiaobo Qu, Weiguo Zhang, Jingping Shi

Journal of System Simulation

Abstract: The split drag rudders (SDRs) were usually used for the yaw control of tailless flying wing aircraft with the symmetric deflection mode. This approach was simple and effective, but the upper and lower deflectors of the SDRs were constrained to deflect symmetrically, limiting the distribution and control mode of the deflectors, reducing the maximum available moment in pitch axis and roll axis, affecting the handling performance of the aircraft flying at low speed. A certain flying wing UAV was used as the study model. The CFD method was adopt to investigate the aerodynamic characteristic of SDRs operating in either …


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