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Articles 1441 - 1470 of 3382
Full-Text Articles in Physical Sciences and Mathematics
Precisely Algorithm And Simulation Of Plurality Of Random Deployed Circulars’ Total Coverage Area, Zhang Ye, Liu Kui, Yuzhi Chen, Junyang Liu, Jianchao Du
Precisely Algorithm And Simulation Of Plurality Of Random Deployed Circulars’ Total Coverage Area, Zhang Ye, Liu Kui, Yuzhi Chen, Junyang Liu, Jianchao Du
Journal of System Simulation
Abstract: A precisely algorithm of total coverage area when a plurality of circulars are random deployed and overlapping with each other is needed. The key issues of the solution are the calculating principle of the overlapping area, the differentiation and enumeration of the multi-overlapping circulars, and the calculation of the multi-shaped curved edges. Based on the inclusion-exclusion principle, overlapping area was added or subtracted to the amount area. The computer calculation process was proposed. Because the circulars are random deployed, in order to ensure the area coverage, the area cover rate problem of repeatedly deployment of the circulars were …
Investigation Of Hybrid Positioning Algorithm Based On Wifi, Fucheng Yin, Wu Dong, Wang Yan, Zhicheng Ji
Investigation Of Hybrid Positioning Algorithm Based On Wifi, Fucheng Yin, Wu Dong, Wang Yan, Zhicheng Ji
Journal of System Simulation
Abstract: TDOA(Time Difference of Arrival) and AOA(Angel of Arrival) methods require additional sensing mechanisms and have poor positioning accuracy used in WiFi environment, so a novel TDOAAOE hybrid positioning algorithm was proposed. The proposed algorithm used the AOE (Angle of Emission) information instead of AOA information to estimate the position of a WiFi-based mobile terminal. In this method, access points emitted signals with angle information encoded in beacon packets through directional antennas; which was rotated by motors. WiFi-based mobile devices estimated angles of the access points by receiving and decoding these beacon packets, which calculated the position themselves. This method …
Digital Simulation And Synthesis Of Yunnan Out-Of-Print Woodcuts Based On Nicks, Li Jie, Jianxia Hou, Xuesong Wang, Xu Dan, Yuanyuan Pu
Digital Simulation And Synthesis Of Yunnan Out-Of-Print Woodcuts Based On Nicks, Li Jie, Jianxia Hou, Xuesong Wang, Xu Dan, Yuanyuan Pu
Journal of System Simulation
Abstract: Woodcut printing is a painting, in which knife and wood block are used instead of pen and paper. Yunnan out-of-print woodcut is an extension of the woodcut printing. By working with a single block and multiple printings, Yunnan out-of-print woodcut can produce special effects of color overlap. Following the working process of it, an automatic method was studied based on nicks to synthesize a virtual Yunnan out-of-print woodcut. Image was sliced out by using color clustering. A global orientation field was got which reflected the gradient information. Real nicks guided by streamlines was placed based on orientation field. The …
Numerical Simulation Study Of Impact Of Stagger Angle And Radius Ratio On Performance Of Combined Type Vawt, Xiucong Fu, Xiaoting Liang, Baoxing Ou, Chili Wu, Ruheng Zhao, Yuepeng Li, Kaihong Pi, Xiao Shuai
Numerical Simulation Study Of Impact Of Stagger Angle And Radius Ratio On Performance Of Combined Type Vawt, Xiucong Fu, Xiaoting Liang, Baoxing Ou, Chili Wu, Ruheng Zhao, Yuepeng Li, Kaihong Pi, Xiao Shuai
Journal of System Simulation
Abstract: Darrieus-Savonius combined rotor could effectively improve the performance of sole type vertical axis wind turbine. In order to investigate the impacts of radius ratios and stagger angles on the combined rotor, and their best combination, aerodynamic simulations of different radius ratios and stagger angles were studied. The numerical simulation is based on 2D unsteady incompressible air model and realizable k-ε turbulence model. The result indicates that the radius ratio represents the occupied swept area of Savonius rotor, the larger radius ratio, the higher proportion of the positive momentum outputs (M≥0) in a rotation period. In addition, …
Simulation On The Asynchronous Reverse Ventilation In Multi-Airshaft Mine, Zongxiang Li, Baosheng Lu, Tianming Wang, Yadi Wang
Simulation On The Asynchronous Reverse Ventilation In Multi-Airshaft Mine, Zongxiang Li, Baosheng Lu, Tianming Wang, Yadi Wang
Journal of System Simulation
Abstract: To describe accurately the change process of airflow and gas in mine ventilation system during mine reverse ventilation period, the software TF1M3D was used to research the asynchronous reverse ventilation in multi-airshaft mine. The possible appeared three ventilator working conditions that shutdown, single operation, dual machine operation were defined and the according three codes were given respectively which were used to be the judgment of ventilator working condition. A numerical simulation test was made with the eighth of Hebi Colliery, the simulation results is consistent with the actual testing records of gas density. At the beginning of reverse …
Energy Efficiency Optimization For Discrete Manufacturing Workshop Based On Discrete Teaching-Learning-Based Optimization Algorithm, Junhui Xu, Wang Yan
Energy Efficiency Optimization For Discrete Manufacturing Workshop Based On Discrete Teaching-Learning-Based Optimization Algorithm, Junhui Xu, Wang Yan
Journal of System Simulation
Abstract: Because the discrete manufacturing workshop is multi-objective and multi-constraint, an energy efficiency optimization model whose optimization objective was to minimize the total energy consumption was built for discrete manufacturing workshop. Besides, an improved teaching-learningbased (TLBO) optimization algorithm for discrete energy efficiency workshop optimization was proposed. This improved algorithm introduced adaptive parameter in training phase to improve the learning efficiency and adaptability of the algorithm. In addition, second discrete process was introduced in the teaching stage and learning stage, respectively. This algorithm could be applied to the optimization of discrete manufacturing workshop under the precondition of ensuring the …
Bubble Dynamics Simulation In Transformer Oil Under Ac Electric Field, Zhao Tao, Yunpeng Liu, Fangcheng Lü, Liu Shan
Bubble Dynamics Simulation In Transformer Oil Under Ac Electric Field, Zhao Tao, Yunpeng Liu, Fangcheng Lü, Liu Shan
Journal of System Simulation
Abstract: The dynamics of gas bubbles in transformer oil was theoretically explored. A numerical model was introduced for the bubble dynamics in the transformer oil under AC electric field. The electrodynamic force was calculated by integrating the Maxwell stress tensor on the surface of the bubble, and then the bubble trajectory was obtained through the force calculation of the bubble under the AC electric field. Notably, trajectories calculated indicate the bubble aggregation in concentrated area of the electric field between the needle-plane electrode, and different bubble radius will affect the trajectory of the bubble. Also, different bubble radiuses cause a …
Arm-Based Real-Time Video Stabilization Enhancement Algorithm, Xiaoquan Chen, Zhang Lei, Huang Hua
Arm-Based Real-Time Video Stabilization Enhancement Algorithm, Xiaoquan Chen, Zhang Lei, Huang Hua
Journal of System Simulation
Abstract: Considering the performance characteristic of ARM processor, an ARM-based real-time video stabilization enhancement algorithm was proposed that identified shakiness of video and implements motion smoothing in the space of geometric transformations. The algorithm identified the shakiness of video with the amplitudes’ change of translation and rotation. Then the optimal path could be obtained by linear interpolation on translational vector and rotational angle. Stable frames were generated by implementing motion compensation of translation and rotation transformations respectively. Because the algorithm used linear interpolation in the space of rigid transformations, it was much faster than the previous algorithms. Moreover, it …
Can Bus Simulation System Based On Opnet, Yantao Liu, Xu Jing, Guiyang Xia, Qin Na
Can Bus Simulation System Based On Opnet, Yantao Liu, Xu Jing, Guiyang Xia, Qin Na
Journal of System Simulation
Abstract: CAN (Controller Area Network) is a typical kind of serial communication protocol. To solve the problem of bus contention, CAN adopts the mechanism of non-destructive bitwise arbitration. In order to realize simulation study on this mechanism, simulation models of Medium Access Control (MAC), process models, node models and network model of CAN were built. End-to-End delay of the simulation network was obtained by simulating these models under the condition of whether there existed a bus contention. The correctness of these models was proved by extensive simulation experiments and rigorous analyses. The models can be used in simulation study …
Research Of Smart Shopping System, Lilong Chen, Jianwen Song, Zhou Wei, Liguo Zhang, Zhigeng Pan
Research Of Smart Shopping System, Lilong Chen, Jianwen Song, Zhou Wei, Liguo Zhang, Zhigeng Pan
Journal of System Simulation
Abstract: Hypermarket is quite large in area, and rich in many different kinds of goods, the customer needs to spend a lot of time looking for the products and waiting in check-out queues; And hypermarket not only needs to invest a lot of manpower and financial resources in links such as shopping guide and check-out, and the efficiency is not high, but also lack of statistical means in spending habits of each customer. It has an important significance in the hypermarket to create a smart shopping system by putting mobile information technology, automatic identification technology (RFID technology, for …
New Voltage Balancing Method For Cascaded Rectifier Based On Predictive Power Model, Hongbin Pan, Linhai Liu, Zhiyong Xiao, Sicheng Ou, Maokun Zhu, Fen Xu
New Voltage Balancing Method For Cascaded Rectifier Based On Predictive Power Model, Hongbin Pan, Linhai Liu, Zhiyong Xiao, Sicheng Ou, Maokun Zhu, Fen Xu
Journal of System Simulation
Abstract: The dq synchronous system was built by constructing virtual orthogonal voltage and current based on second order generalized integrator. The predictive power model was derived to construct main control system of cascaded H-bridge rectifier combining the instantaneous power theory, which took the duty cycle of active and reactive power as control object. Then, a new voltage balancing control strategy was proposed dealing with the problem of DC voltage imbalance in cascaded H-bridge rectifier. The modification of active power was obtained by the voltage balance controller when the objective function of coupling effect achieves minimum and the active power was …
Viability Control Of Rigid Body Wheeled Robots For High Speed Obstacle Avoidance, Liu Lei, Gao Yan, Yuepeng Wu
Viability Control Of Rigid Body Wheeled Robots For High Speed Obstacle Avoidance, Liu Lei, Gao Yan, Yuepeng Wu
Journal of System Simulation
Abstract: The robot is taken as a point during most existing obstacle avoidance control methods for wheeled robot. These methods have limitations in actual situation. When a robot is considered as a rigid body, in order to get high speed performance, the relationship between robot model, contour and obstacle should be considered in detail. An approach to avoiding obstacle with high speed based on viability theory was proposed for wheeled robots. The line features were extracted from the obstacles, and then high dimension viability boundaries were designed via these features, rigid body contours and states of the robot. According to …
Simulation Technology Research On Streak Tube Imaging Lidar, Wenze Xia, Shaokun Han, Jingya Cao
Simulation Technology Research On Streak Tube Imaging Lidar, Wenze Xia, Shaokun Han, Jingya Cao
Journal of System Simulation
Abstract: A simulation model on streak tube imaging lidar was introduced. The range equation of lidar, the pulse model of illuminating laser and the scanning equation were used in the model. The system noise was analyzed. The experiment result shows the effectiveness of proposed simulation model. The effect of the pulse laser peak power on distance precision of reconstructed range image was analyzed. This method provided theoretical guidance and desired result inspection for designing of the streak tube imaging lidar.
Optimized Linear Active Disturbance Rejection Controller Design For Hydraulic Turbine Governing Systems, Huang Yu, Jiarong Wang
Optimized Linear Active Disturbance Rejection Controller Design For Hydraulic Turbine Governing Systems, Huang Yu, Jiarong Wang
Journal of System Simulation
Abstract: The linear active disturbance rejection control is difficult to obtain good control effect as its parameters are not easy to get. A gravitational search algorithm based on Nelder-Mead (NM) simplex search was presented. The replace mechanism of NM simplex search and the particles update method of gravitational search algorithm were combined together in this algorithm. Simplex method has strong local search ability, therefore, the algorithm can overcome the shortcomings of gravitational search algorithm plunging into the local optimal. The proposed algorithm was applied to the parameter optimization of linear active disturbance rejection controller of hydraulic turbine governor system. Simulation …
Self-Adaptive Multi-Swarm Particle Swarm Optimization Algorithm, Xuewen Xia, Bojian Wang, Jin Chang, Guoliang He, Chengwang Xie, Wei Bo
Self-Adaptive Multi-Swarm Particle Swarm Optimization Algorithm, Xuewen Xia, Bojian Wang, Jin Chang, Guoliang He, Chengwang Xie, Wei Bo
Journal of System Simulation
Abstract: To overcome the shortcomings of poor ability to escape a local optimal, premature convergence and low precision of the traditional particle swarm optimization algorithm (PSO), a self-adaptive multi-swarm particle swarm optimization (SMPSO) was proposed. In SMPSO, the whole population was divided into many parallel-evolution multi-swarms, the aim of which was to keep diversity of the population. Furthermore, a self-adaptive regrouping operator was proposed to reinforce the information sharing and interaction between different swarms. In addition, particles’ historical information were periodic sampling and the statistics results were used to direct the best solution to carry out a detecting …
Energy Consumption Analysis Of Discrete Manufacturing Based On Improved Principal Component Analysis Method, Chen Yan, Wang Yan
Energy Consumption Analysis Of Discrete Manufacturing Based On Improved Principal Component Analysis Method, Chen Yan, Wang Yan
Journal of System Simulation
Abstract: Due to the complexity of energy consumption of the discrete manufacturing system and the interaction between energy consumption indexes, the result of energy consumption analysis is hard to obtain, establishing energy efficiency evaluation index of discrete system, based on the three levels of energy consumption of products, equipment energy efficiency, the energy efficiency of task process. Furthermore, a method was proposed to analyze the discrete manufacturing process energy consumption based on improved principal component analysis method. The method introduced importance weights, overcame the shortcoming of traditional component analysis, which only emphasized the information weights, combined the subjective and …
Modeling And Simulation For Target Complex Trajectory Of Ballistic Missile, Jiawei Li, Jiang Jing, Chongyang Liu, Binbin Shi
Modeling And Simulation For Target Complex Trajectory Of Ballistic Missile, Jiawei Li, Jiang Jing, Chongyang Liu, Binbin Shi
Journal of System Simulation
Abstract: Aiming at the complexity and multi-phase process of the trajectory of target complex formed by ballistic missile in space, a phased modeling approach is proposed. Due to the differences of the motion characteristics at different phases, based on the phased modeling thought, the release model of coast decoy in symmetric release structure is established under the corresponding coordinate systems. Under the consideration of several factors: the number, mass, initial state, and vanishing condition, the generation process of multiple batches of boost debris trajectories is designed. The main target trajectory of ballistic missile, decoys release process and multiple batches of …
Assessment Model Of Conflict Probability At Airport Surface Intersection, Weijun Pan, Xiaolin Luo, Kang Rui, Chenyu Huang, Zhenghong Xia, Wenbin Qiu
Assessment Model Of Conflict Probability At Airport Surface Intersection, Weijun Pan, Xiaolin Luo, Kang Rui, Chenyu Huang, Zhenghong Xia, Wenbin Qiu
Journal of System Simulation
Abstract: Based on aircraft characteristics, the assessment model of conflict probability at airport surface intersection was studied to ensure the safety of airport ground safety. The engine jet effect distance was introduced to expand the scope of intersection conflict, describing the process of aircraft conflict. The model with the actual operation data was verified, and the speed interval's impact on the model was analyzed and discussed. In the view of three motion states of aircraft, this model analyzed the variations in conflict probability. When speed variation range is 0.5m/s, probability analysis of the conflict is more ideal, and can improve …
Flow Visualization Based On Enhanced Streamline Line Integral Convolution, Han Min, Haichao Zhang, Maosong Bian, Danchen Zheng
Flow Visualization Based On Enhanced Streamline Line Integral Convolution, Han Min, Haichao Zhang, Maosong Bian, Danchen Zheng
Journal of System Simulation
Abstract: In order to show the flow information clearly and reduce the calculation of linear integral convolution, an enhanced streamline linear integral convolution algorithm was proposed. The generation of streamlines were improved. Critical points were detected and the points’ area with a gradient fill was generated. Combined two integration methods in different areas, the integration step was updated adaptively. Utilizing the parallelism of GPU and GLSL (OpenGL shading language), the algorithm further improved the sharpness of the output image. Experiments show that the improved linear integral convolution algorithm posses both the speedability and the precision. And the flow visualization of …
Numerical Analyses And Research Of Lc And Rc Filter Circuits For Nonperiodic Signal, Zhou Jing, Jianbin Zhou, Hong Xu, Yingjie Ma, Wang Min, Zhou Wei
Numerical Analyses And Research Of Lc And Rc Filter Circuits For Nonperiodic Signal, Zhou Jing, Jianbin Zhou, Hong Xu, Yingjie Ma, Wang Min, Zhou Wei
Journal of System Simulation
Abstract: With a numerical method, LC and RC filter circuits were used to the nonperiodic signal filtering analyses in DC power output voltage. By applying the method of numerical solution of differential equation, the numerical recursive solution of circuit differential equations could be obtained, thus, numerical models of circuits could be established. The numerical models could be used to the quantitative analysis of nonperiodic signal. The defects of LC and RC filter circuits in DC power output voltage filtering were indicated, LRC filter circuit was introduced, and numerical simulation results show that this circuit can overcome the defects of LC …
Research On Characteristics Of City Agglomeration Compound Traffic Network, Chengbing Li, Wei Lei, Yucheng Hao
Research On Characteristics Of City Agglomeration Compound Traffic Network, Chengbing Li, Wei Lei, Yucheng Hao
Journal of System Simulation
Abstract: In order to serve the economic development of city agglomeration, revealing the characteristics of city agglomeration compound traffic network was focused on. The model of city agglomeration compound traffic network was built using the site mapping method based on analysis of the structure of city agglomeration compound traffic network. The characteristics and specific calculation method based on complex network theory were put forward. Compound traffic network of road and rail traffic network was generated through an empirical study of Hu-Bao-E city group, and node degree, node degree distribution, average path length, clustering coefficient of this network be computed …
Grey Wolf Optimizer For Parameters Identification Of Induction Motor With Improved Model, Xiaoyi Lü, Huang Song, Wang Yan, Zhicheng Ji
Grey Wolf Optimizer For Parameters Identification Of Induction Motor With Improved Model, Xiaoyi Lü, Huang Song, Wang Yan, Zhicheng Ji
Journal of System Simulation
Abstract: According to the problems of inaccurate parameters estimation of the induction motor in high-performance control, a grey wolf optimizer was used to identify the parameters of the induction motor. Grey wolf optimizer is a new meta-heuristic. It is simple and flexible to implement, and has fewer parameters to tune. Considering that two typical dynamic mathematical models have different identification precision on different parameters, the improved identification model of the induction motor was proposed. Compared with typical model, simulation results show that the proposed model obviously improves the identification performance of resistances especially stator resistance, verifying the validity …
Modeling And Simulation Of Offshore Support Vessel Anchoring Operation, Hongbo Sun, Chaojian Shi, Wenjin Lin
Modeling And Simulation Of Offshore Support Vessel Anchoring Operation, Hongbo Sun, Chaojian Shi, Wenjin Lin
Journal of System Simulation
Abstract: In order to understand the configurations of mooring line and working wire, tension variation at release point of working wire and the influence of the offshore support vessel during anchoring operation, a mathematical models of OSV anchoring operation was established. According to the MMG (Ship Manoeuvring Mathematical Model Group) ship motion mathematical modeling theory, a 6dof ship motion mathematical model was built. And a 6dof cable motion mathematical model was established with finite difference method. A coupling ship-cable-anchor-cable system model was established. The system motion simulations were carried out, and the results indicate that the model …
Design And Simulation Of Regional Differently Filtering Method Of Fbp Algorithm For Multilayer Spherical Shell, Jingtao Xia, Qunshu Wang, Jiming Ma, Hei Dongwei, Sheng Liang, Fuli Wei, Guzhou Song
Design And Simulation Of Regional Differently Filtering Method Of Fbp Algorithm For Multilayer Spherical Shell, Jingtao Xia, Qunshu Wang, Jiming Ma, Hei Dongwei, Sheng Liang, Fuli Wei, Guzhou Song
Journal of System Simulation
Abstract: Aiming at the CT detection technology research for multilayer spherical shell with great density difference, the parallel beam CT projection and image reconstruction system model were built and a software platform was developed. Combined with theoretical analysis and computer simulation, the filtering method of FBP theory for image reconstruction was focused on. A special scanning mode was limited to make the projection sinogram of multilayer spherical shell show a regional spatial distribution, which was divided up combined with image analysis and priori knowledge. Then, according to the frequency characteristic and reconstruction demand, RL and SL functions were respectively used …
Numerical Simulation On Self-Synchronization Of Double Mass Vibrating System With Tri-Exciter, Yongjun Hou, Le Yu, Fang Pan, Zhou Ran
Numerical Simulation On Self-Synchronization Of Double Mass Vibrating System With Tri-Exciter, Yongjun Hou, Le Yu, Fang Pan, Zhou Ran
Journal of System Simulation
Abstract: A double mass vibrating system of self-synchronization with tri-exciter was put forward. The dynamic differential equation of the double mass vibrating system was established and the electromechanical coupling mathematical model was got. The new electromechanical coupling simulation model was built. By the method of controlling variables, the effects of various factors, such as stiffness of middle spring, resonance, centrifugal force and motor mounting position on self-synchronization of the system and phase difference were studied in a numerical experiment manner. The research results show this system can achieve a stably synchronized motion under certain conditions. The stiffness of intermediate spring, …
Research Of Non-Dead-Time Control Method On Single-Phase Off-Grid Inverter Based On H6 Topology, Kun Xia, Li Jing, Ge Yue, Lirong Shen, Yiming Wang, Xu Po
Research Of Non-Dead-Time Control Method On Single-Phase Off-Grid Inverter Based On H6 Topology, Kun Xia, Li Jing, Ge Yue, Lirong Shen, Yiming Wang, Xu Po
Journal of System Simulation
Abstract: A novel non-dead-time control strategy based on H6 topology was proposed. Through detecting the value and direction of the output voltage and current of inductor, the power switches of bridge arm were modulated if they were in the same direction, and the freewheeling switches were modulated if they were opposite. In order to protect the DC bus voltage from shorting out, the dead time should be added during the zero-crossing of voltage and current. And the states of switches were adjusted by calculation of the control module. Then most dead time could be eliminated. The simulation model for the …
Intelligent Effectiveness Evaluation And Optimization On Weapon System Of Systems Based On Deep Learning, Li Ni, Yuhong Li, Guanghong Gong, Xiaodong Huang
Intelligent Effectiveness Evaluation And Optimization On Weapon System Of Systems Based On Deep Learning, Li Ni, Yuhong Li, Guanghong Gong, Xiaodong Huang
Journal of System Simulation
Abstract: In the process of conventional WSoS (Weapon System of Systems) operational effectiveness evaluation, multiple complex steps including reconfiguring the scenario, rerunning the WSoS simulation system, and conducting effectiveness evaluation model calculations are taken. For the problems of conventional effectiveness evaluation method, such as the complex process and time-consuming, the intelligent evaluation method of WSoS combat effectiveness based on machine learning regression is proposed, and the optimization process of combat effectiveness based on evolutionary strategy is introduced. Taking the full connection depth regression network as the prediction model, the guiding selection principles of network hidden layer number and sample …
Blind Image Quality Assessment Based On Natural Scene Statistics, Haiyang Li, Weiguo Cao, Shirui Li, Kelu Tao, Li Hua
Blind Image Quality Assessment Based On Natural Scene Statistics, Haiyang Li, Weiguo Cao, Shirui Li, Kelu Tao, Li Hua
Journal of System Simulation
Abstract: Nowadays blind/referenceless image spatial quality evaluator (BRISQUE) based on natural scene statistics is one of the state-of-the-art no-reference algorithms. But it only analyzes the original image and ignores the difference of the features constructed. Here an improved algorithm BRISQUEs is proposed and implemented by three steps. First, we apply mean subtracted contrast normalized to the gradient images and construct a new feature vector to assess quality. Second, we weight some key features of BRISQUE to improve assessment. After the two assessments obtained, a further average is made to weaken the bias from different assessments. Through the experiments on the …
Soft Sensor Of Particle Size Of Grinding Process Based On Improved Csapso Neural Networks, Zhou Ying, Huimin Zhao, Chen Yang, Wang Long
Soft Sensor Of Particle Size Of Grinding Process Based On Improved Csapso Neural Networks, Zhou Ying, Huimin Zhao, Chen Yang, Wang Long
Journal of System Simulation
Abstract: Aiming at the problems that the particle size can’t be measured online and the offline analysis by lab sample existing in large-time delay, by combining the characteristics of the one stage grinding circuit, the soft sensor model of particle size was proposed by the combination of improved chaotic self-adaptive particle swarm optimization and BP neural network algorithm. Taking advantages of chaotic theory ergodicity and PSO global optimal searching ability, the algorithm above couldadjust the weights of BP network adaptively and avoid falling into the local optimum. As a result of MATLAB simulation, the measurement accuracy of the improved CSAPSO-BP …
Method To Calculate Multi-Objective And H2/H∞ Control Of Vehicle Vertical Vibration System, Jianjun Meng, Bai Huan, Mou Jian, Yin Ming, Xuri Guan
Method To Calculate Multi-Objective And H2/H∞ Control Of Vehicle Vertical Vibration System, Jianjun Meng, Bai Huan, Mou Jian, Yin Ming, Xuri Guan
Journal of System Simulation
Abstract: Aiming at the disadvantage of single object in railway vehicle damping system,the multi-objective optimal control law of railway vehicle damping system was devised to balance shock absorption control and energy saving control. To improve the riding comfortability and reduce the energy consumption, the multi-objective H2/H∞ output-feedback controller based on LMI was developed for an active suspension of 6-DOF vertical vibration model of railway vehicle. Norm H2 of the actuator output was taken as the energy consumption indexes, and norm H∞ of the vertical vibration displacement, the acceleration and the nutation angle was taken as …