Pipeline Design And Simulation Optimization Of Hydraulic Driving System For Rape Windrower,
2020
College of Engineering, Huazhong Agricultural University, Wuhan 430070, China;
Pipeline Design And Simulation Optimization Of Hydraulic Driving System For Rape Windrower, Caixia Shu, Yan Lei, Li Lei, Cairui Han, Yajun Jiang, Youchun Ding, Qingxi Liao
Journal of System Simulation
Abstract: Based on disadvantages with large pipeline size and tube loss about the existing hydraulic driving system of rape windrower, according to the pipelines of hydraulic drive system for rape windrower, the relationship between the tube loss and pipeline structure parameters was analyzed and determined. Combined with the effect of tube losses, minimum bend radius and cost, the comprehensive scoring method was used to optimize the pipe diameter of the header, horizontal and vertical conveyor assembly operating branches. Consistency was.determined between the simulation of the tube loss by FLUENT module of the ANSYS and the result obtained by fuzzy evaluation …
Properties Of Terahertz Wave Propagation In Inhomogeneous Plasma Sheath,
2020
1. School of Science, Air Force Engineering University, Xi’an 710051, China; ;
Properties Of Terahertz Wave Propagation In Inhomogeneous Plasma Sheath, Jiang Jin, Changxing Chen, Wang Cheng, Ting Chen, Tianxiang Zhou, Yunfei Ling
Journal of System Simulation
Abstract: The communication blackout usually happens when the hypersonic vehicles voyage in the near space. According to the data provided by radio attenuation measurement C (RAM C) voyage experiment, two models of inhomogeneous plasma sheath were established after dividing the near space into two spatial layers to build two mathematical models. The principle of interaction between plasma and terahertz wave was analyzed through numerical calculation, getting the properties of terahertz wave propagation in plasma sheath. The simulation shows that the terahertz wave frequency band selected as communication frequency band used in near space can solve the problem of communication blackout. …
Simulative Study Of Machining Mechanism Of Material In Micro-Edm,
2020
1. Department of Computer Engineering, Dongguan Polytechnic, Dongguan 523808, China; ;2. DG-HUST Manufacturing Engineering Institute, Dongguan 523808, China; ;
Simulative Study Of Machining Mechanism Of Material In Micro-Edm, Wang Shi, Jianwen Guo, Wuxue Jiang, Wenliang Cao
Journal of System Simulation
Abstract: Great complexity and randomness exist in micro-electrical discharge machining (micro-EDM) process. Considering the limitations of molecular dynamics model and numerical model based on heat transfer theories in studies on machining mechanism of micro-EDM, a hybrid modeling method in which the two-temperature model and molecular dynamics simulation model were integrated was used to construct the machining model for the anode in micro-EDM process, and the corresponding parallel simulation platform was built based on MPI technology. In this simulation model, a heat source was placed in the electron system to mimic the thermal action of the discharge channel on the anode …
Improved Apit Localization Algorithm Based On Wireless Sensor Network,
2020
Institute of Electrical Automation, Jiangnan University, Wuxi 214122, China;
Improved Apit Localization Algorithm Based On Wireless Sensor Network, Wu Dong, Zhicheng Ji, Zhang Biao
Journal of System Simulation
Abstract: To address the problems of Approximate Point-In-Triangulation Test (APIT) algorithm in Wireless Sensor Network requiring high anchor node density, Out-To-In or In-To-Out error judgment, nodes failure and so on, an improved APIT localization algorithm based on Wireless Sensor Network was proposed. The method based on directional searched node and combined with RSSI ranging calculation by Gaussian fitting method was used to deal with error judgment. Besides, a geometrical method was used to process the failure nodes. The simulation results show that the improved localization algorithm performs greatly better, both in positioning accuracy and number of error judgment, than the …
Simulation Analysis Of Load Characteristic Of Thin Seam Shearer Drum,
2020
1. College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China; ;
Simulation Analysis Of Load Characteristic Of Thin Seam Shearer Drum, Lijuan Zhao, Tian Zhen, Xunan Liu, Xie Bo
Journal of System Simulation
Abstract: In order to analysis the load characteristics of thin seam shearer drum under complex geological conditions, the determination conditions of tooth working state were proposed, the drum load calculation scheme was designed according to the condition of coal seam and the working state of shearer. A thin seam shearer drum as the object of research, the load spectrums of drum under five typical working conditions were calculated, the law of cutting resistance moment and cutting power with different drum revolution speed and haulage speed was analyzed. The results show that: the load fluctuation from cutting hard inclusions is …
Building Arc-Sprial Search Models Of Dipping Sonar Based On Transcendental Target Moving Course,
2020
Department of Teaching and Studying, Naval Flying Academy, Huludao 125001, China;
Building Arc-Sprial Search Models Of Dipping Sonar Based On Transcendental Target Moving Course, Wu Min
Journal of System Simulation
Abstract: Based on the known probable moving course of submarine targets, and the actual searching process of anti-submarine airplane, to search the target in the finite domain, the wind factor to affect searching process was analyzed. The arc-spiral searching model of dipping sonar and submarine moving models were built. In the factor of given ocean environments, the experimental results simulated and analyzed the arc-spiral searching course of dipping sonar. The experimentation compared and analyzed the influence of searching probabilities on curve searching, sector searching, and arc-spiral searching manners. The experimental results indicate that the searching probability of arc-spiral searching …
Study On Lane Keeping Performance With Electric Power Steering System,
2020
1. School of Mechanical Engineering, Department of Automotive Engineering, Univ. of Shanghai for Science and Technology, Shanghai 200093, China; ;2. Machinery Industry Key Laboratory for Mechanical Strength & Reliability Evaluation of Auto Chassis Components, Shanghai 200093, China;
Study On Lane Keeping Performance With Electric Power Steering System, Sun Tao, Zhengjin Xu, Songlin Zheng, Zhendong Zhang, Yuedong Sun
Journal of System Simulation
Abstract: With consideration of the characteristics of Electric Power Steering system (EPS), vehicle lane keeping system can make full use of EPS function as steering actuator for lane following assist. A couple of vehicle dynamic equations were derived for two operational modes including steering assistant mode and active steering mode. Meanwhile, vehicle single track handling model, nonlinear tire model, driver model, EPS model and corresponding optimal lane tracking algorithm were built and developed respectively. The lane keeping algorithm with EPS actuator was validated by virtue driver-in-the-loop approach based on the EPS experimental map from a certain type of …
Simulation Study On Scheduling Strategy Of Dynamic Vehicle Routing Problem,
2020
1. Institute of Software, Dalian Jiaotong University, Dalian 116045, China; ;2. School of Management, Dalian University of Technology, Dalian 116026, China;
Simulation Study On Scheduling Strategy Of Dynamic Vehicle Routing Problem, Ning Tao, Guo Chen, Chen Rong, Jin Hua
Journal of System Simulation
Abstract: For the purpose of solving the rescheduling of dynamic vehicle routing problem, the simulation model was established to minimize the cost and optimize the stability. The method of double chains structure coding was proposed. An improved hybrid multi-phases quantum particle swarm algorithm was proposed. An AHP (Analytic hierarchy process strategy) was introduced to obtain the optimal strategy from the Pareto solution. A novel method was applied to a dynamic simulation and the result of comparing with other classical algorithms verifies its effectiveness.
Autonomous Flight Control And Simulation Study Of Independent Developed Soft-Wing Uav,
2020
1. Shenyang Institute of Automation (SIA), Chinese Academy of Sciences (CAS), Shenyang 110015, China; ;
Autonomous Flight Control And Simulation Study Of Independent Developed Soft-Wing Uav, Juntong Qi, Jinda Liu, Shang Hong, Liying Yang, Mei Sen, Jianda Han
Journal of System Simulation
Abstract: Soft-wing UAV is composed of ram air parafoil hanging powered vehicle with ropes. The special structure of soft-wing UAV makes it possess apparent mass, flexible structure and relative motions, which are the difficulties of modeling and controlling of soft-wing UAV. Autonomous flight controller design method based on mathematical model can low-costly and high-efficiently achieve control algorithms for UAV. Based on the physical parameters of the self-designed soft-wing UAV, a 6 DOF mathematical model was built. A flight controller and visual simulation system was designed. By using the trajectory points simulation, the numerical and visual simulation was synchronously realized which …
Three-Dimensional Virtual Reassembling For Broken Artifact Fragments Based On Leap Motion,
2020
1. College of Information Science and Technology, Beijing Normal University, Beijing 100875, China; ;
Three-Dimensional Virtual Reassembling For Broken Artifact Fragments Based On Leap Motion, Haoran Lu, Zhang Yu, Miaomiao Niu, Wuyang Shui, Mingquan Zhou
Journal of System Simulation
Abstract: 3D laser scanning technique has been widely used to acquire geometry information of artifacts. The broken relics can be virtually restored with the help of computer technologies. Aiming at solving the problems of the automatic virtual restoration for broken artifact fragments, a new method of semi-automatic reassembly was proposed. The motions of the user’s hands were simulated by using the data captured by Leap Motion. The movement of each fragment model was controlled interactively so that two fragments could be roughly matched. The matching results were fed back to the user in real-time, and the user could optimize …
Fault Spatial-Temporal Detecting And Diagnosis For Power Grid Based On Wavelet Analysis,
2020
1. School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China; ;
Fault Spatial-Temporal Detecting And Diagnosis For Power Grid Based On Wavelet Analysis, Li Gang, Pengcheng Xu, Longmei Han
Journal of System Simulation
Abstract: The monitoring data of modern power system have strong intrinsic relationship and its abnormal and fault signal is often hidden in big data sets, so the traditional Fourier transform analysis methods don't have the ability of time domain localization analysis. A new method based on time-frequency characteristics of wavelet analysis was proposed for singularity detection of transient signals in power system, which through decomposing the multi-scale one-dimensional transient signal wavelet, extracted high frequency and low frequency coefficient, and got fault time information while the signal de-noising; then based on the singularity detection of modulus maxima, the fault location information …
Attitude Control Of Vtol Hexrotor Aircraft Based On Lyapunov Theory,
2020
1. Nanjing University of Posts and Telecommunications, Nanjing 210023, China; ;
Attitude Control Of Vtol Hexrotor Aircraft Based On Lyapunov Theory, Xuemin Yuan, Kecai Cao
Journal of System Simulation
Abstract: The considered hexrotor is a symmetric VTOL-UAV with six rigid mono-directional propellers, and the interval between each propeller is 60°. In order to overcome the inherent geometric singularity of Euler angle description, quaternion representation was used to model. The effect of gyroscopic torques and reactive torques was taken into account when simplifying our model. An approach for hexrotor was proposed in which two nearly equivalent control laws were used to obtain asymptotic stability of attitude angles and attitude angular velocity of the hexrotor UAV. Simulation results emphasize the effectiveness of the proposed control scheme.
Optimized Composite Input Shaping Based On Residual Oscillation Suppressing,
2020
Research Institute of Mechanical Engineering; Southwest Jiaotong University, Chengdu 610031, China;
Optimized Composite Input Shaping Based On Residual Oscillation Suppressing, Huasen Liu, Wenming Cheng
Journal of System Simulation
Abstract: The optimized input shaping control method was proposed to reduce the under actuated overhead crane’s oscillation caused via the inertia force. The dynamic model of the overhead crane was proposed according to the physics structure of the crane. The probability distribution function of the crane’s swing frequency was obtained. The optimized multi-model composite based on the probability distribution function of the crane’s swing frequency was used as the feed-forward input to increase the frequency of robustness. Simulation results indicate that the optimized multi-model composite input shaping can reduce the oscillation the overhead crane.
Modeling And Quaternion Control Of X-Type Quadrotor,
2020
1. Hubei Inland Shipping Technology Key Laboratory, Wuhan 430063, China; ;2. Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Ministry of Education, School of Information Engineering,Wuhan University of Technology, Wuhan 430070, China;
Modeling And Quaternion Control Of X-Type Quadrotor, Shaobin Ding, Changshi Xiao, Jingen Liu, Yuanqiao Wen
Journal of System Simulation
Abstract: A comprehensive dynamic model of X-type quadrotor was established and simulated. Different from other widely used models that usually treated quadrotor as a single-rigid-body system, the rotors, propellers and the aircraft body were treated as a multi-rigid-body system in the proposed model. The 3D model wireframe was constructed using Solidworks and the important inertial parameters were extracted from the design data. Two types of multi-channel-double-loop vector PD flight controller were designed and fine tuned, one was based on quaternion feedback and the other was based on Euler angle feedback. The close-loop systems were simulated on Matlab/Simulink. The simulation results …
Research On Bifurcation Of A Class Of Cortical Eeg Model With Time Delay,
2020
1. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China; ;
Research On Bifurcation Of A Class Of Cortical Eeg Model With Time Delay, Chunsheng Li, Zhang Xue
Journal of System Simulation
Abstract: The bifurcation characters of a cortical-model with bidirectional time delays were studied, proposed by Robinson, et al. before. Considering transmitting delay between excitatory and inhibitory populations, the stability, bifurcation characters and bifurcation region were achieved. The relationship of cortical potential spectrum density and transmit delay was analyzed when white noise was introduced. Result shows that time delay between different population acts as an important role of model’s dynamic characters and stability, and numerical simulation verifies the theoretical analysis. This research shows the importance of transmit delay in cortical-model, and provides theoretical illustration for further research of epileptic …
Pinning Control For Synchronization Of Hr Biological Neural Networks:Linear Active Disturbance Rejection Approach,
2020
School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China;
Pinning Control For Synchronization Of Hr Biological Neural Networks:Linear Active Disturbance Rejection Approach, Wei Wei, Wen Jiao
Journal of System Simulation
Abstract: Synchronization of a complex network whose nodes are Hindmarsh-Rose biological neurons was considered. Coupling strengths of the whole network were always taken as the tuning variables. However, coupling strengths may not be changeable. In addition, synchronization was affected by different disturbances. In view of above factors, pinning control was utilized and linear active disturbance rejection control (LADRC) was designed. By this approach, synchronization was achieved in according to synchronization errors of the controlled nodes and the couplings among nodes. In the simulations, coupling strength was fixed at a relative small value, and no external disturbance case …
Optimization Model Of Cis Network Architecture Based On Information Flow,
2020
School of Information and Navigation Air Force Engineering University, Xi’an 710077, China;
Optimization Model Of Cis Network Architecture Based On Information Flow, Jianhua Li, Junwei Zhao
Journal of System Simulation
Abstract: In order to explore the internal relationship between Command Information System (CIS) network and combat system, a layered combat system model was built, including organizational relationship layer, information interaction layer and communication link layer. Conception of the system coupling intensity was defined, which reflected the influence of network architecture to combat system. An optimization model of CIS network architecture aimed at maximizing the ratio of system coupling intensity to cost coefficient was built. A route programming genetic algorithm was designed and applied into simulation of Air Offensive Campaign (AOC) system network. The results show that the model and algorithm …
Research On Damage Ratio Considering Target-Location Error,
2020
1. The Artillery Engineering Department, Ordnance Engineering College, Shijiazhuang 050003, China; ;
Research On Damage Ratio Considering Target-Location Error, Xieen Song, Weidong Song, Ma Qian
Journal of System Simulation
Abstract: Different computing methods for target-location error have much influence on the result of cluster target damage ratio. In order to find a suitable method, based on existing damage ratio analytical method and error combination method, several new ideas, such as error synthesis method, random target method, were proposed. By analyzing specific examples and comparing the results, the accuracy and application conditions for each method were reached. Random target method was proved to be the best on the whole; error combination method was optimal when it could meet the conditions of analytical method and data error combination; target-location …
Simulation On Spontaneous Combustion Of Goaf Under “U” Type Ventilation And Improvement,
2020
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 Liaoning 123000, China; ;3. Tunnel & Underground Structure Engineering Center of Liaoning, Dalian Jiaotong University, Dalian 116028, China; ;
Simulation On Spontaneous Combustion Of Goaf Under “U” Type Ventilation And Improvement, Tiejun Cui, Yundong Ma, Laigui Wang
Journal of System Simulation
Abstract: To understand the change of temperature and heating area, in different time, in the process of spontaneous combustion of goaf under “U” type ventilation, the model was proposed based on the theory of particle flow. The three basic problems of Oxygen equivalent flow and reaction with the coal were solved, and implemented with FISH. According to the actual working condition, the heating process was simulated, which could be divided into three stages, and the characteristics of the six warming development time were analyzed, finding that the heating area change was related with the oxygen flow in the process of …
From The Tree Of Knowledge And The Golem Of Prague To Kosher Autonomous Cars: The Ethics Of Artificial Intelligence Through Jewish Eyes,
2020
Edith Cowan University
From The Tree Of Knowledge And The Golem Of Prague To Kosher Autonomous Cars: The Ethics Of Artificial Intelligence Through Jewish Eyes, Nachshon Goltz, John Zeleznikow, Tracey Dowdeswell
Research outputs 2014 to 2021
This article discusses the regulation of artificial intelligence from a Jewish perspective, with an emphasis on the regulation of machine learning and its application to autonomous vehicles and machine learning. Through the Biblical story of Adam and Eve as well as Golem legends from Jewish folklore, we derive several basic principles that underlie a Jewish perspective on the moral and legal personhood of robots and other artificially intelligent agents. We argue that religious ethics in general, and Jewish ethics in particular, show us that the dangers of granting moral personhood to robots and in particular to autonomous vehicles lie not …
