Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Simulation (131)
- Virtual reality (41)
- Genetic algorithm (40)
- Numerical simulation (40)
- Path planning (39)
-
- Modeling and simulation (35)
- Particle swarm optimization (34)
- Deep learning (33)
- Modeling (33)
- Multi-objective optimization (29)
- Digital twin (27)
- Fault diagnosis (27)
- Simulation model (23)
- Reinforcement learning (22)
- System simulation (22)
- Neural network (21)
- Visualization (21)
- Optimization (19)
- System dynamics (19)
- Virtual simulation (19)
- Complex network (17)
- Traffic simulation (17)
- UAV (17)
- Permanent magnet synchronous motor (16)
- Unity3D (16)
- Energy consumption (15)
- Support vector machine (15)
- Collision detection (14)
- Deep reinforcement learning (14)
- Parameter identification (14)
- Publication Year
Articles 2011 - 2040 of 3382
Full-Text Articles in Physical Sciences and Mathematics
Weapon Effectiveness Simulation System (Wess), Yonglin Lei, Yao Jian, Zhu Ning, Yifan Zhu, Weiping Wang
Weapon Effectiveness Simulation System (Wess), Yonglin Lei, Yao Jian, Zhu Ning, Yifan Zhu, Weiping Wang
Journal of System Simulation
Abstract: Combat Systems Effectiveness Simulation (CESS) is an important supportive means to combat systems analysis and conceptual design. When confronted with issues like model reusability, simulation composability, and system evolvability, traditional approaches to develop CESS systems find their limitations. Based on years experiences in CESS field and best practices found in overseas CESS simulation systems, a model architecture based CESS modeling methodology was proposed. Around a sophisticated CESS model architecture, a generic CESS system, named WESS, was realized. The functional features, software architecture, application processes, and key aspects of WESS were introduced. A typical case study demonstrates the functionalities of …
Research On Full-Circuit Simulation Platform For Conducted Noise Pre-Evaluation, Shangbin Ye, Jiajia Zhang, Yicheng Zhang, Yongtao Yao
Research On Full-Circuit Simulation Platform For Conducted Noise Pre-Evaluation, Shangbin Ye, Jiajia Zhang, Yicheng Zhang, Yongtao Yao
Journal of System Simulation
Abstract: As conducted noise frequency band of power convertor in electric vehicle is stricter than that in normal industrial equipment, a conducted noise simulation modeling method is needed which is suit for wide frequency range. A full-circuit conducted noise modeling method based on component model was proposed, in which high frequency dynamic characteristic was simulated by the active device model, complex impedance characteristic at full frequency band was described by the passive model, distributed parameter of bus structure and near-field coupling parameter were extracted to simulate their influence on coupling path of conducted noise. On the basis, full-circuit simulation platform …
Speed-Aware-Based Reliable Probabilistic Route In Manet, Yaohua Chen, Lingxi Peng, Gu Peng
Speed-Aware-Based Reliable Probabilistic Route In Manet, Yaohua Chen, Lingxi Peng, Gu Peng
Journal of System Simulation
Abstract: For broadcast problem of routing in MANET, speed-aware-based reliable probabilistic route discovery (SRPR) scheme was proposed. SRPR considered speed vector and all nodes were divided into reliable nodes and un-reliable nodes. A node among reliable nodes closest to destination was assigned a high probabilistic routing decision by greedy forwarding strategy. The reliability of routing was improved and the number of routing hop was reduced by SRPR scheme. Ad Hoc On-demand Distance Vector (AODV) routing was adopted in the experiments. Simulation results show that the proposed routing protocol mitigates the broadcast storm problem and outperforms in term of number of …
Double Bare Bones Particle Swarm Algorithm For Solving Flexible Job-Shop Scheduling Problem, Yueming Dai, Minghui Wang, Wang Chun, Wang Yan
Double Bare Bones Particle Swarm Algorithm For Solving Flexible Job-Shop Scheduling Problem, Yueming Dai, Minghui Wang, Wang Chun, Wang Yan
Journal of System Simulation
Abstract: To solve flexible job shop scheduling problem, a double bare bones particle swarm algorithm (DBBPSO) was proposed to minimize the makespan. Combining Von-neumann bare bones particle swarm optimization algorithm and chaotic mutation bare bones particle swarm optimization algorithm, the algorithm DBBPSO used a communication method to cooperate evolution. This approach could keep balance between global exploration and local exploration, and a machine selection method was proposed based on the tenet of minimizing makespan. The proposed algorithm was compared with other algorithms on four benchmark problems and a scheduling optimization example. Simulation results indicate that the improved algorithm has …
Model Uncertainty Quantification For Dependent Variables Based On Random Set Theory, Zhao Liang, Zhanping Yang
Model Uncertainty Quantification For Dependent Variables Based On Random Set Theory, Zhao Liang, Zhanping Yang
Journal of System Simulation
Abstract: Random set theory provides a uniform mechanism for model uncertainty quantification in system analysis. An improved method was proposed based on random set theory for uncertainty quantification considering the dependence among system variables. The Nataf transformation was used to generate dependent random samples to be consistent with correlation coefficients information, and then the joint basic probability assignments for the multidimensional focal elements were calculated to construct the random set. The result of uncertainty quantification based on the random set can reflect the real system response under dependent variables. Simulation results show the presented method rationality.
State Feedback Control Of Hybrid Active Power Filter, Yunjian Wang, Xiaoyun Liu, Rongzhi Zhang, Nana Xue
State Feedback Control Of Hybrid Active Power Filter, Yunjian Wang, Xiaoyun Liu, Rongzhi Zhang, Nana Xue
Journal of System Simulation
Abstract: According to the current tracking of active power filter, a state feedback control strategy was applied to three-phase shunt hybrid active power filter system, replacing popular PID controller, to overcome the drawbacks of the PID controller, such as big overshoot, error compensation etc.. The mathematical model was established and the feedback control law was derived based on the topological structure of hybrid active power filter selected. Moreover, the current detection used ip-iq detection algorithm while the stability of capacitor voltage in DC side used PI control. MATLAB/Simulink was applied to simulate the HAPF system, comparing with …
Design And Simulation Of Cut Flat Boring Bar By Both Materials' Composite Structure, Xie Feng, Wenxuan Wang, Xiaobao Lei
Design And Simulation Of Cut Flat Boring Bar By Both Materials' Composite Structure, Xie Feng, Wenxuan Wang, Xiaobao Lei
Journal of System Simulation
Abstract: Because the stressed structure of the boring bar in machine tool is a cantilever beam, and it is very easy to produce vibration. To study the vibration problem of boring bar, the general structure of boring bar was improved into the built-in damping core boring bar structure composed of two materials, according to the principle of self-excited vibration's coupling flutter and forced vibration's dynamic damping. At the same time, according to the principle that reasonable arrangement of small stiffness of the boring bar could reduce vibration, the composite structure boring bar was cut flat expecting to reach optimal damping …
Design Of Real-Time Communication On Bus Using Dspace System, Yan Cheng, Decong Huo, Xie Song
Design Of Real-Time Communication On Bus Using Dspace System, Yan Cheng, Decong Huo, Xie Song
Journal of System Simulation
Abstract: The analysis of the problem of real-time communication on CAN bus was proposed using dSPACE simulator, and the solution was proposed. The CAN communication model based on dSPACE was designed using the methods of Interrupt or Enable to trigger the action. The spacecraft subsystem simulation model was built on the dSPACE, and the real-time communication was performed following the spacecraft CAN bus communication protocol, to implement the communication with large amount of data between subsystem simulation model and data handling subsystem. The simulation result verifies the validity of the communication method.
Motion Object Feature Extraction Method Based On Multi-Feature Fusion, Xidao Luan, Yuxiang Xie, Zhang Xin, Niu Xiao
Motion Object Feature Extraction Method Based On Multi-Feature Fusion, Xidao Luan, Yuxiang Xie, Zhang Xin, Niu Xiao
Journal of System Simulation
Abstract: Motion object feature extraction is the basis of motion object classification. Traditionally motion object classification mainly depends on single feature extraction which is sensitive to the aspects like motion object detection area, angle, scale and noise disturbance, thus decreases the classification efficiency. To solve these problems and improve the robustness of the algorithms, a motion object feature extraction method based on multi-feature fusion was proposed. In this method, width height ratio feature, rotation invariant uniform local binary pattern feature and SIFT feature were considered, and by fusing them into the SVM and KNN classifier, motion object classification was carried …
Numerical Simulation Of Aluminum Foam Cushion Performance Analysis On Set-Forward Overload Of Fuze, Kuahai Yu, Xuhui Zhang, Hongyu Xu, Li Rong, Xingguo Kang
Numerical Simulation Of Aluminum Foam Cushion Performance Analysis On Set-Forward Overload Of Fuze, Kuahai Yu, Xuhui Zhang, Hongyu Xu, Li Rong, Xingguo Kang
Journal of System Simulation
Abstract: Buffering protect of fuze under high-speed impact was realized using aluminum foam gasket with special pore structure, and numerical simulation method to achieve the buffer validity analysis. Numerical model of three-layered concrete target projectile penetration was established, and the numerical model was validated to be accurate by comparing the fuze acceleration curves of simulation and experiment results. Numerical simulations were completed to predict the cushioning effect for different foamed aluminum structures. The result reveals that foamed aluminum cushioning can reduce the load of the fuze, and the foam's void ratio and thickness will significantly affect the cushioning performance, and …
Modeling And Realization Of Radar Signal Environment Based On Systemvue, Limin Liu, Cheng Cheng, Zhuangzhi Han
Modeling And Realization Of Radar Signal Environment Based On Systemvue, Limin Liu, Cheng Cheng, Zhuangzhi Han
Journal of System Simulation
Abstract: Aiming at the practical requirements of electronic reconnaissance subsystem in an electronic countermeasure simulation system, according to electronic reconnaissance forms and the distribution of two parties, a modeling method of radar signal environment was proposed. It provided the mixed signals source for electronic reconnaissance subsystem. The signal modeling principle was proposed, which defined the position information of radar platform and target platform in trajectory layer. The angle information was defined in antenna layer, which realized radar signal modeling in signal layer. The radar signal environment simulation system of electronic countermeasure was established based on SystemVue at last. It is …
Location Method Of Insulators In Power Grid Patrol Aerial Images, Haiyan Cheng, Han Pu, Wang Di, Yongjie Zhai
Location Method Of Insulators In Power Grid Patrol Aerial Images, Haiyan Cheng, Han Pu, Wang Di, Yongjie Zhai
Journal of System Simulation
Abstract: A method to locate the insulators in the power grid patrol aerial images was proposed. OTSU algorithm improved by genetic algorithm was applied to segment insulators from backgrounds. The segmented images were filtered and reconstructed based on morphology algorithm. SketchUp software was used to build insulator samples, namely positive samples. The moment invariants of these samples and negative samples(background) were calculated respectively to train a classifier based on AdaBoost algorithm. By using the trained classifier, segmented insulators were classified and located coarsely. The Order Cut method (OC) was used to cut the original minimum circumscribed rectangle consisting of all …
Simulation Study On Price Control Model With Multiplicative Reference Effect, Yang Hui, Zhang Chen
Simulation Study On Price Control Model With Multiplicative Reference Effect, Yang Hui, Zhang Chen
Journal of System Simulation
Abstract: Considering customers' reference-dependent behavior, modeling and simulation study of the revenue management pricing problem with multiplicative reference effect was focused on, which defined the concept of multiplicative reference effect, described the characteristics of the reference effect function and the demand function with multiplicative reference effect, constructed the optimal control model with continuous time and continuous prices, proposed the Hamilton-Jacobi equation, provided simulation algorithm and designed simulation experiments to compare the pricing strategies under different demand circumstances. The simulation study shows that the reference effect has substantial impact on pricing paths and total revenues. The results provide management …
Simulation Of Coal Flow Movement Process In Coal And Gas Outburst Of Roadway Network, Zongxiang Li, Yadi Wang, Chunhua Zhang, Tianming Wang
Simulation Of Coal Flow Movement Process In Coal And Gas Outburst Of Roadway Network, Zongxiang Li, Yadi Wang, Chunhua Zhang, Tianming Wang
Journal of System Simulation
Abstract: In order to improve the simulation accuracy of the process in coal and gas outburst disaster period, time step method was put forward to describing the movement and accumulation of coal flow in roadway network when coal and gas outburst happened. Downward dip angles of tunnel were taken as the independent variables, model for distribution weight of coal output was built based on “Downward Priority” principle, and the model could adapt to downward roadway, nearly horizontal roadway and upward roadway. Strength change of outburst coal was established based on the collapse model. Combining with the coal and gas outburst …
Research And Application Of Cloud Manufacturing Service Platform For Crane, Yang Chen, Zhongjie Wang, Zhaohui Liu, Nana Yu
Research And Application Of Cloud Manufacturing Service Platform For Crane, Yang Chen, Zhongjie Wang, Zhaohui Liu, Nana Yu
Journal of System Simulation
Abstract: Based on the research fruits of cloud manufacturing, the cloud manufacturing platform for crane was focused on. Based on the connotation analysis of the crane manufacturing, the key technologies of manufacturing resource access and cloud service modeling were discussed. A multi-level dynamic matching model and a comprehensive matching algorithm were proposed. The construction and testing of the cloud manufacturing platform was carried out, and the future works were given.
Modeling And Numerical Simulation Of Micro-Tube Scale Effects In 3dp Process, Congping Chen, Xiaoyun Wang, Jieguang Huang, Li Bo
Modeling And Numerical Simulation Of Micro-Tube Scale Effects In 3dp Process, Congping Chen, Xiaoyun Wang, Jieguang Huang, Li Bo
Journal of System Simulation
Abstract: Wall slip and viscous dissipation are two main scale effects in 3DP (Three dimensional printing) process, which has influences on the material's flow properties and thermophysical properties and the printing quality. According to the two phenomena above, theoretic models of wall slip and viscous dissipation were established, respectively, and the software Polyflow was used to study the two scale effects and their interactions with molten ABS in micro-tubes of different radius. Simulation results show that wall slip level increases with the slip coefficient decreasing, and material's velocity decreases with the increase of tube radius; Viscous dissipation level decreases …
Simulation And Improvement Of Automobile Front Cover Assembly Work Based On Delmia, Lizhen Zhang, Shao Qi, Jiaqing Yang, Mengmeng Yang, Song Zheng, Dai Peng
Simulation And Improvement Of Automobile Front Cover Assembly Work Based On Delmia, Lizhen Zhang, Shao Qi, Jiaqing Yang, Mengmeng Yang, Song Zheng, Dai Peng
Journal of System Simulation
Abstract: In order to prevent potential occupational disease in automobile front cover assembly location caused by manual handling, a comprehensive evaluation and improvement method of ergonomics was proposed aiming at front cover assembly work ergonomics based on DELMIA. The ergonomics problems in automobile front cover assembly were evaluated quantitatively and comprehensively by using the methods of rapid upper limb assessment (RULA) and lifting equation analysis (NIOSH), and the process or tools were judged whether they should be improved according to the evaluation results. By simulation, analysis and improvement of front cover assembly work, the improvement plans which aimed at the …
Research On Highline Cable Parametric Design Platform Of Alongside Replenishment At Sea, Li Nan, Zhuobin Wei, Xuejun He, Shiyun Zhang
Research On Highline Cable Parametric Design Platform Of Alongside Replenishment At Sea, Li Nan, Zhuobin Wei, Xuejun He, Shiyun Zhang
Journal of System Simulation
Abstract: High cable is an important part of the horizontal replenishment equipment at Sea. Its performance directly affects the safety of replenishment at sea. Because there is not a suitable high cable dynamic model in the domestic, for the first time to take the high cable as a multi-body system and established the flexible-body dynamics model. Then the optimization design model of high cable which is on the basis of the model was established. Meanwhile it set up the parametric design platform of high cable by using ADAMS to parameterize the optimization design model. The optimization design results of a …
Dynamic Evolvement And Emergence Modeling For Distributed Operational Systems Capability, Yinghui Yang, Jianhua Li, Mingli Nan, Chen Qiang, Jifang Wen
Dynamic Evolvement And Emergence Modeling For Distributed Operational Systems Capability, Yinghui Yang, Jianhua Li, Mingli Nan, Chen Qiang, Jifang Wen
Journal of System Simulation
Abstract: Aiming at dynamic characteristic of battlefield environment, particularity of operational systems, function heterogeneity and nonlinear effect of operational units, a new dynamic evolvement and emergence modeling method for distributed operational systems capability was proposed. Operational systems super-network model composing of unit layer and network & system layer was built based on super-network theory, and relationship between two layers was analyzed. Concepts of unit capability, network & system capability, systematic capability and fire procedure link were defined. Unit to capability mapping relationship and capability to capability relationship were researched respectively. Affects of unit self-effect, units' inter-effect, network promotion and battlefield …
Study On Influence Of Community Structure On Opinion Topic Propagation Of Micro-Blog, Hengmin Zhu, Hu Wei, Ma Jing, Wei Jing
Study On Influence Of Community Structure On Opinion Topic Propagation Of Micro-Blog, Hengmin Zhu, Hu Wei, Ma Jing, Wei Jing
Journal of System Simulation
Abstract: Micro-blog gathers a large number of users, and community structure is a typical feature of Micro-blog network. In order to explore the influence of community structure on the opinion topic propagation of Micro-blog, users' psychology was analyzed for selecting their followees, and a model for constructing Micro-blog network was proposed which could modify community structure of network with a community factor. Experiments testify the effect of the community factor on micro-blog network structure, and use a SIR model to analyze the influence of different topic source nodes and community factors on the topic propagation of simulated networks. The result …
Simulation Investigation Of Rumor Spreading Model Base On Two-Layer Scale-Free Networks, Zhihua Qin, Yongmei Liu
Simulation Investigation Of Rumor Spreading Model Base On Two-Layer Scale-Free Networks, Zhihua Qin, Yongmei Liu
Journal of System Simulation
Abstract: Relationship network is a carrier of rumor spreading. Separating the media from the relationship network, a two-tier rumor spreading model was proposed based on tunable clustering scale-free network and SIQR spreading model. Meanwhile the rumor spreading rules of the new model were developed. In simulation experiments, the influence associated with the three parameters of the media layer was analyzed by using the Mult-Agent system Netlogo4.0.2. It is found that improving the sensitivity of the media, regulating media ethics and expanding the scope of the media can curb the spread of rumors.
Robust Control Of Free-Floating Two-Flexible-Link Space Manipulator Based On Observer, Xiaoyan Yu, Chen Li
Robust Control Of Free-Floating Two-Flexible-Link Space Manipulator Based On Observer, Xiaoyan Yu, Chen Li
Journal of System Simulation
Abstract: The joint motion robust control and optimal flexible vibration control of a free-floating two-flexible-link space manipulator based on linear observers was discussed. The dynamic model of a free-floating space manipulator with two flexible links was established by the momentum conservation and the Lagrange equations. Based on singular perturbation approach and choosing appropriate local coordinate frame, a slow subsystem and a flexible-link fast subsystem were obtained. The corresponding controllers were proposed for the two subsystems, which was the linear observer based robust slow subsystem controller and the linear observer based flexible link fast subsystem optimal controller. Numerical simulation demonstrates …
Modeling And Simulation Of Magnetostrictive Impact Drive Mechanism, Zhao Ran, Quanguo Lu
Modeling And Simulation Of Magnetostrictive Impact Drive Mechanism, Zhao Ran, Quanguo Lu
Journal of System Simulation
Abstract: A model of magnetostrictive impact drive mechanism (IDM) was built to predict the step size and velocity, in which the dynamical model and the second order non-linear model of magnetostrictive material based on Jiles-Atherton model were considered. The simulation model was developed by utilizing MATLAB /Simulink software, and the data of IDM's displacement and velocity was obtained based on the model. The experimental system was built to testify the given model. The results illustrate that the error between experiment and simulation results are less than 15% within the range of driving current 0.2~0.4A and working frequency 10~100Hz. The …
Numerical Simulation And Aerodynamic Effect Research For Multi-Warhead Projection, Yuan Wu
Numerical Simulation And Aerodynamic Effect Research For Multi-Warhead Projection, Yuan Wu
Journal of System Simulation
Abstract: In order to study the complex aerodynamic problem in multi-warhead projection, and also establish the practical analysis method for nonlinear aerodynamic characteristics, the separation process was simulated by using CFD technology as well as Monte Carlo method for a statistical research, while effects of the projection condition, multi-body intervene and unsteady characteristic during the separation process were discussed. The present research shows that the main forms of the submunition movement are radial separation and pitching movement; the direction of mass center motion and attitude motion is determined by the projection condition, however the attitude motion is also sensitive to …
In-Cylinder Flow Analysis And Verification Of Opposed-Piston Two-Stroke Engine, Fukang Ma, Changlu Zhao, Zhenfeng Zhao, Wang Hao, Yu Xia, Cao Yan, Jiqing Zhang
In-Cylinder Flow Analysis And Verification Of Opposed-Piston Two-Stroke Engine, Fukang Ma, Changlu Zhao, Zhenfeng Zhao, Wang Hao, Yu Xia, Cao Yan, Jiqing Zhang
Journal of System Simulation
Abstract: The effects of flat piston uniform scavenging chamber, flat piston non-uniform scavenging chamber and pit piston non-uniform scavenging chamber on the in-cylinder flow were analyzed. Uniflow scavenging zero-dimensional model was used to qualitative analysis in-cylinder flow organizational process and influence rule for opposed-piston two-stroke engine. Results show that uniform scavenging chamber can organize swirl and increase scavenging efficiency and non-uniform scavenging chamber can organize tumble and increase turbulent kinetic energy. Scheme 3 is favorable to organize tumble and maintain the in-cylinder turbulence intensity, which is increased by 150 percent.
Dfig Grid Connection Simulation Method Used For Transient Analysis Of Black-Start, Liqing Liu, Zengqiang Mi, Du Ping, Yuliang Wan, Yuan He
Dfig Grid Connection Simulation Method Used For Transient Analysis Of Black-Start, Liqing Liu, Zengqiang Mi, Du Ping, Yuliang Wan, Yuan He
Journal of System Simulation
Abstract: Establishing a grid connection model of doubly-fed induction generator based wind turbine (DFIG) could be useful in the research and verification of black-start strategy in isolated power grid containing wind power. A DFIG grid connection simulation method based on Simulink was proposed. Through analyzing the operation characteristics of doubly-fed induction generator in no-load and grid-connected conditions, its dual-operation simulation model was established. According to the grid-connection theory of DFIG, the established doubly-fed induction generator model was combined with wind turbine, converter and other built-in modules, and the DFIG grid connection model was built with its control system added. …
Simulation And Analysis On Coupled Vibration Of Fracturing Truck Process, Chuan Wang, Zhenqiang Xie, Guorong Wang, Shimin Zhang, Hou Wen, Li Jun, Zhou Xu, Chu Fei
Simulation And Analysis On Coupled Vibration Of Fracturing Truck Process, Chuan Wang, Zhenqiang Xie, Guorong Wang, Shimin Zhang, Hou Wen, Li Jun, Zhou Xu, Chu Fei
Journal of System Simulation
Abstract: In order to study the effect of vibration of engine and fracturing pump on truck body during fracturing operation, lumped parameter method and state space method were used to build multi-body dynamics coupling model between the balanced suspension, tires, engine, fracturing pump and the frame. Based on this model, the MATLAB/Simulink software was applied to simulate the characteristic of rotational speed, stiffness and damping of the 2 500 fracturing truck during fracturing operation. The results show that the maximum intensity of vertical vibration is stronger hundreds times than pitch motion. Vibration frequency range of 0~10 Hz …
Research On Reactor Modeling Simulation Based On Neutron Equivalence Homogeneous Theory, Ma Jin, Zhibin Liu, Bingshu Wang, Xinhui Duan
Research On Reactor Modeling Simulation Based On Neutron Equivalence Homogeneous Theory, Ma Jin, Zhibin Liu, Bingshu Wang, Xinhui Duan
Journal of System Simulation
Abstract: A mathematical nuclear CANada Deuterium Uranium (CANDU) reactor steady and transient modelling simulation is built to get the axial thermal power distribution. With a relatively small number of nodes (100-500 nodes) to present the core, based upon two energy group Neutron Diffusion Formulation and a typical spatial discretization, according to equivalence theory and homogeneous method, this is accomplished by properly defining the nuclear properties (absorption and fission cross sections, diffusion coefficient, etc.) characterizing each of the nodes finished. The 390 channels thermal power distribution is calculated under Linux language environment. The thermal power difference is within 5% error with …
Research On Intelligent Hauling Speed Regulation System Based On Shearer's Reliability, Xunan Liu, Lijua Zhao, Dongmin Gai, Zhangyu Du, Liangying Hao
Research On Intelligent Hauling Speed Regulation System Based On Shearer's Reliability, Xunan Liu, Lijua Zhao, Dongmin Gai, Zhangyu Du, Liangying Hao
Journal of System Simulation
Abstract: Under the mine, Shearer's hauling speed affected the shearer's efficiency and reliability. Taking MG32570*2/325-BWD shearer as research object, from shearer's reliability, by using Simulink, the intelligent speed regulation system was established, based on shearer key parts' reliability. The building & simulation of hauling motor load torque block and recommended optimum hauling speed generation block which was fitted by neural network was solved. The simulation results show that: this system can achieve the recommended speed, which is traced by hauling speed rapidly and accurately. When consistent coefficient and cutting depth are 2.85 and 0.58m, the hauling motor's maximum speed is …
Research On Visual Objective Test Method Of High-Level Flight Simulator, Zhangfa Liu, Huiyong Li
Research On Visual Objective Test Method Of High-Level Flight Simulator, Zhangfa Liu, Huiyong Li
Journal of System Simulation
Abstract: With the development of commercial aircraft, the demand of high-level flight simulator will increase. In addition to development and production, qualification test is a key link to ensuring the quality of simulator. Visual system plays an important role of flight simulator. In order to meet the requirement of qualification from CAAC, visual objective test based on main qualification test guide of flight simulator was developed. It is very significant that test requirements, test theory and test methods of visual objective test item were researched deeply, including transport delay, field of view, system geometry, surface contrast, brightness, surface resolution, light …