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- Keyword
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- Simulation (131)
- Virtual reality (41)
- Genetic algorithm (40)
- Numerical simulation (40)
- Path planning (39)
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- 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 1381 - 1410 of 3382
Full-Text Articles in Physical Sciences and Mathematics
Research And Design For Indoor Illumination Environment Evaluation System Based On Virtual Reality, Chengcheng Jiang, Xiandou Zhang
Research And Design For Indoor Illumination Environment Evaluation System Based On Virtual Reality, Chengcheng Jiang, Xiandou Zhang
Journal of System Simulation
Abstract: With the improvement of human life, some kinds of pollution which was neglected have been taken seriously, the light pollution is one of them. Some international organizations have been proposed light pollution prevention technical regulations and guidelines, these kinds of documents only limit the parameters like brightness on the point of lighting design, but not make any worldwide standards system to evaluate and prevent illumination pollution. Therefore, the quality of illumination environment especially indoor illumination environment is difficult to quantify. Indoor illumination environment evaluation system (EvaLighting0.1) aims to build a standard model for indoor illumination environment. In this model, …
Study Of Virtual Human Voice Interaction On The Soothing Effects Of Anxiety, Yang Yi, Dongdong Weng, Xue Song, Su Mo
Study Of Virtual Human Voice Interaction On The Soothing Effects Of Anxiety, Yang Yi, Dongdong Weng, Xue Song, Su Mo
Journal of System Simulation
Abstract: In recent years, virtual human has been widely applied in areas such as medicine, psychology and etc. However, its pacifying effect upon anxiety has not been empirically researched. For that reason, a human system including stereo display, face, motion and voice interaction was built as well as presenting a deep study of virtual human interaction on the soothing effects of anxiety. A stereoscopic virtual human system with high visual fidelity was built using the principle of 3d display. Chinese voice interaction as well as movement and expression driven function was achieved by improving Virtual Human Toolkit development package. With …
Kinect Based Serious Game Of Entertainment And Body Exercise For Elderly, Chen Hao, Liu Zhen, Chen Tian, Tingting Liu, Cuijuan Liu, Xianying Zhu
Kinect Based Serious Game Of Entertainment And Body Exercise For Elderly, Chen Hao, Liu Zhen, Chen Tian, Tingting Liu, Cuijuan Liu, Xianying Zhu
Journal of System Simulation
Abstract: China's population is aging rapidly and it is an interesting topic to use information technology to help the elderly to improve the quality of life. Based on the study of relative researches on Kinect applications, a 3D interactive table tennis game for the elderly was designed to improve the upper limb movement of the elderly. Emotion reasoning rules were built with agent theory to let virtual human display the feedback of the user’s operation by facial expression and voice. Preliminary test results show that the game is easy to operate and can provide a new method for elderly to …
Design Of Multi-Rotor Uavs’ Positioning Controller Based On Data Fusion, Qinghe Wang, Wan Gang, Xuefeng Cao, Lixiang Xie
Design Of Multi-Rotor Uavs’ Positioning Controller Based On Data Fusion, Qinghe Wang, Wan Gang, Xuefeng Cao, Lixiang Xie
Journal of System Simulation
Abstract: A dynamical model of multi-rotor UAVs was established, and a positioning controller of multi-rotor UAVs in an indoor environment was designed. In order to improve the accuracy of positioning, the specific tag was set to provide visual data for the UAV in interior space. Fusing the inertial data and the height data obtained from sensors of the UAV with visual data through the Extended Kalman Filter, and the UAV’s position was obtained from the estimation of flight state in real time. Simulation results show that the error of the UAV’s position reduces significantly after fusing the visual data, …
Real-Time Virtual Simulation Of Tidal Bore, Guisheng Fang
Real-Time Virtual Simulation Of Tidal Bore, Guisheng Fang
Journal of System Simulation
Abstract: Tidal bore is a kind of unique natural landscape and tourism resource in the world. Research on characteristic of tidal bore is very useful to help people realize surge prevention and disaster reduction and discover new resources of tidal bore. The traditional research method based on numerical simulation has great deficiencies in the aspect of interaction and real-time and visualization. The virtual simulation method was introduced to simulate the tidal bore. The Navier-Stokes equations were solved by the Smoothed Particle Hydrodynamics method to simulate dynamically the formation, evolution and dissipation of the tidal bore. The phenomena of the intersecting, …
Research On Dynamic Generation Of 3d Lines In City Rail Transit Simulation System, Baoping Yan
Research On Dynamic Generation Of 3d Lines In City Rail Transit Simulation System, Baoping Yan
Journal of System Simulation
Abstract: The continuous integration of Virtual Reality Art and technology has effectively promoted the visual presentation of the traditional virtual simulation. In the process of design and development, through the realistic 3D modeling design with efficient game engine technology, the actual operation environment of virtual simulation objects could be completely simulated. In this field of combining with art design and technology, with science-based rule of rail transit, abstract and mathematical analysis, independent units were used to mutually splicing mechanism way. This mechanism effectively reduces the resource cost of the running system, it ensures the quality of the picture, and …
Ship Damage Floatation Calculation Based On Stl Model, Chunlei Liu, Yin Yong, Xiaofeng Sun, Xiufeng Zhang, Helong Shen
Ship Damage Floatation Calculation Based On Stl Model, Chunlei Liu, Yin Yong, Xiaofeng Sun, Xiufeng Zhang, Helong Shen
Journal of System Simulation
Abstract: In order to calculate the damaged floating state of bulk carrier,an iterative algorithm was discussed based on STL model of the ship shell and all the compartments. According to the STL model, the 3D database of ship was established, "weight Added method" and "iterative method" were used to calculate the floating state of the damage ship. Bulk carrier "DOLCE VITA" was taken as an example, “The normal ballast condition at arrival" and "Fully loaded with homogeneous cargo at departure" loading conditions were calculated, compared with calculated value of ship design software NAPA, the average error of trim is …
Application Of Model Prediction Control In Ship Dynamic Positioning Simulator, Xiaobin Qian, Yin Yong, Xiufeng Zhang, Xiaofeng Sun
Application Of Model Prediction Control In Ship Dynamic Positioning Simulator, Xiaobin Qian, Yin Yong, Xiufeng Zhang, Xiaofeng Sun
Journal of System Simulation
Abstract: According to the requirement of ship Dynamic Positioning simulator control simulation system, a model predictive control scheme was proposed for DP simulator with the proportional integrator. Ship Dynamic Positioning simulator was mainly used for training and competency assessment of DP operator. At present, DP Simulator mainly depends on imports and there is no domestic DP simulator with independent intellectual property rights. Dynamic Positioning controller is one of the key technologies, which determines the performance of DP simulator. Considering the unknown slowly-varying marine environment disturbance and vessel constraints, a dynamic positioning controller was designed based on the model predictive control …
Interactive Illustration Technologies For Energy Stations Using Unity3d, Gaoqi He, Kailin Yang, Jin Yi, Chen Qi, Haijie Li, Zhigeng Pan
Interactive Illustration Technologies For Energy Stations Using Unity3d, Gaoqi He, Kailin Yang, Jin Yi, Chen Qi, Haijie Li, Zhigeng Pan
Journal of System Simulation
Abstract: This paper presents one web-based interactive illustration system for energy stations using Unity3D as render engine. Interaction, scene rendering and data-driven visual analysis are the key technologies for this study. One low-coupling logical framework of virtual illustration is designed for five view layers using state pattern. From the viewpoint of event response and trigger on-demand, one concise human-computer-interaction interface is carried out. High-quality visualization of energy station is realized using Unity3D, which includes dynamic texture, water animation in water pipe, modeling and bake. Json database is used as transfer hub for external data access. Thus the dynamic …
Research On Motion Capture In Substation Virtual Environment, Yuping Huo, Xiu’E Zhang, Li Bing, Weiqing Li
Research On Motion Capture In Substation Virtual Environment, Yuping Huo, Xiu’E Zhang, Li Bing, Weiqing Li
Journal of System Simulation
Abstract: In the immersive transformer training simulator, using MEMS inertial motion capture system, the operator’s motion data was captured and analyzed. According to the typical operation in the substation virtual environment, the semantics of interaction were studied. SVM classification algorithm based on grid search and cross validation was used to recognize operator’s gestures. The identified gestures were used to actuate the virtual human’s action in the substation virtual environment. A priority classified character animation method with deformation weight control was proposed to render different priority level actions at the same time. Two modes of virtual operation performance, character animation sequences …
Research On Welding Process Modeling And Narrow Operating Area Searching For Shipbuilding Block, Zhaohui Wu, Yunfei Yang, Qianya Cai, Wenmin Zhu
Research On Welding Process Modeling And Narrow Operating Area Searching For Shipbuilding Block, Zhaohui Wu, Yunfei Yang, Qianya Cai, Wenmin Zhu
Journal of System Simulation
Abstract: To solve the status that the welding operation is difficult because of the narrow segmented regions in shipbuilding block, the searching algorithm of narrow operating area combined with welding process simulation model was presented. Block model of ship, welding process model and welding resource model were completed to establish the block welding process simulation model. The collision and interference detection was used to check the space required by the welding operation rapidly, and then the potential narrow operating area based on the sequence planning of assembly process was achieved. The area can provide effective input for the man-machine engineering …
Modal Analysis Of Iced Conductor Galloping For Continuous Spans, Xiaohui Liu, Lufei Zhang, Yan Bo, Xiaoyan Zhang
Modal Analysis Of Iced Conductor Galloping For Continuous Spans, Xiaohui Liu, Lufei Zhang, Yan Bo, Xiaoyan Zhang
Journal of System Simulation
Abstract: The parameter analysis was presented for continuous spans vibration induced by single-span conductor galloping. The fine finite element model of continous spans and insulator strings was set up by ABAQUS softwart, the aerodynamic load was defined by UEL. So the dynamic response of continuous spans induced by single-span conductor galloping were numerically simulated in ABAQUS. The numerical simulation results show that the structure parameters have obvious effect on the vibration amplitude of the displacements and tention, low order modes have great influence on the vibration amplitede of the displacements, high order modes have great influence on the vibration amplitude …
Research On Herd Behavior Simulation Based On Scale Free Network In Artificial Stock Market, Wu Jiang, Zhang Hui, Chuan Tang
Research On Herd Behavior Simulation Based On Scale Free Network In Artificial Stock Market, Wu Jiang, Zhang Hui, Chuan Tang
Journal of System Simulation
Abstract: To study the mechanism of herd behavior, an artificial stock market multi-agents model was established based on a scale free network investor relationship structure. Four kinds of investors were defined, which are fundamentalists, noise traders, speculators, and trend followers. Investors made a transaction according to their own specific investment strategy, and were meanwhile influenced from own neighbors, so the herd behavior came into being among these investors. The simulation results show that there is a positive relationship between the total herd behavior level of investors and the volatility of returns, and a significant difference between herding levels for four …
Modeling And Control Simulation Research Of Macro-Micro 3-Rpr Parallel Mechanism, Youxiong Xu, Zhou Hao, Songqing Zhu, Renjie Gu
Modeling And Control Simulation Research Of Macro-Micro 3-Rpr Parallel Mechanism, Youxiong Xu, Zhou Hao, Songqing Zhu, Renjie Gu
Journal of System Simulation
Abstract: According to the contradiction between the large stroke and high precision of the parallel mechanism, a novel macro-micro 3-RPR parallel mechanism was presented which used the electrohydraulic servo control system as the macro driven and used the piezoelectric precision control system as the micro driven. Then, the macro-micro coupling dynamic model of the macro-micro 3-RPR parallel mechanism was deduced by principle of Virtual work. Its multi-software co-simulation model was built, including Adams mechanical module, AMESim hydraulic and piezoelectric diver module, Matlab/Simulink control module. According to the 3-RPR parallel mechanism characteristics of multi-input multi-output, nonlinear, strong coupling and so …
Selection Of Simulation Model Based On Principal Component Analysis, Jiao Song, Shaojie Mao, Zhenqi Ju, Chu Wei
Selection Of Simulation Model Based On Principal Component Analysis, Jiao Song, Shaojie Mao, Zhenqi Ju, Chu Wei
Journal of System Simulation
Abstract: To reduce the subjectivity of result for selecting the simulation model when the reference output is complete, the selection method of simulation model based on principal component analysis and grey comprehensive evaluation was proposed. The simulation outputs were divided into three kinds of static data, gradual data and fast data according to the data feature, and the measure models of differences for each kind data were given. The correlation among the feature differences was eliminated via principal component analysis, and several independent principal components were gained. The independent principal components were integrated based on grey comprehensive evaluation, and …
Adaptive Quick Artificial Bee Colony Algorithm Based On Opposition Learning, Xiaojian Yang, Yiwei Dong
Adaptive Quick Artificial Bee Colony Algorithm Based On Opposition Learning, Xiaojian Yang, Yiwei Dong
Journal of System Simulation
Abstract: On the basis of analyzing such shortcomings of the artificial bee colony algorithm (ABC) as slow convergence, low convergence precision and premature convergence, the opposition-learning adaptive quick artificial bee colony algorithm (OAQABC) was proposed. A new step size was proposed, which made the around food source parameter of quick artificial bee colony algorithm (QABC) adaptive, and combined the opposition-based learning to improve the employed bee phase. The experimental results show that OAQABC has better performance than basic ABC and QABC. Also the optimization performance of OAQABC is better than particle swarm optimization (PSO) algorithm and Cuckoo Search (CS) algorithm …
Design Of Virtual Prototype For Lunar Rover In Training Simulation System For Teleoperation, Miao Yi, Ti Zhou
Design Of Virtual Prototype For Lunar Rover In Training Simulation System For Teleoperation, Miao Yi, Ti Zhou
Journal of System Simulation
Abstract: To implement the requirements of training and simulation for the teleoperation of lunar rover, the methods of modeling lunar rover is studied in the simulation of virtual prototype on ADAMS, a framework was proposed for the simulation system of lunar rover, the 3D-ontology model of virtual prototype was given, the relative relations were analyzed among parts, and relatively fixed parts were partitioned by combining. The constraints relations were modeled by kinematics pair, and the dynamics moment in the motions were added for the relative moving of parts. A series of experiments were designed to validate that the simulation of …
Research On Simulation Of Heat Source Model Based On Finite Element Method In Surface Grinding, Wang Yan, Jianhua Xie, Xiong Wei, Yang Lin, Zhang Sheng
Research On Simulation Of Heat Source Model Based On Finite Element Method In Surface Grinding, Wang Yan, Jianhua Xie, Xiong Wei, Yang Lin, Zhang Sheng
Journal of System Simulation
Abstract: Considering the influence of cutting chip thickness on the heat flux distribution, the discrete loading method of heat source model and its effects on numerical calculation error were analyzed. A novel load method towards heat source model with a non-integral function distribution was put forward based on the discretizing idea of finite element method (FEM). On the basis of the new provided load method, simulations about typical grinding conditions were conducted using parabolic and Rayleigh distribution heat source model, to analyze the influence law of heat source model on grinding temperature field. Compared with the measured grinding temperature and …
Simulative Analysis Of Capacity Of Transmission Data For Drilling Fluid Based On Cfd, Hongyuan Zheng, Bai Rui, Shuijing Lü, Ce Liu
Simulative Analysis Of Capacity Of Transmission Data For Drilling Fluid Based On Cfd, Hongyuan Zheng, Bai Rui, Shuijing Lü, Ce Liu
Journal of System Simulation
Abstract: Drilling fluid is a typical information transmission medium in the field of oil industry. But for a long time, the lack of relevant research on the data carrying capacity of its data results in difficult to develop high performance mud pulse generator. The CFD simulation technology as a tool; to the actual oil down-hole working environment as the background, and to the depth of the parameters for variables, water-based drilling fluid data transmission capacity were systematically researched. The corresponding relationship between the mud pressure wave transport rate and the depth of the mud at 1000~6000 m depth was obtained, …
Study On Goaf Treatment And Settlement Simulation Of Existing Overlying Highway Subgrade, Tiejun Cui, Yundong Ma, Laigui Wang
Study On Goaf Treatment And Settlement Simulation Of Existing Overlying Highway Subgrade, Tiejun Cui, Yundong Ma, Laigui Wang
Journal of System Simulation
Abstract: To avoid that mining impacts on the settlement of above highway roadbed, goaf treatment schemes were put forward, such as roof blasting, filling mining and filling mining+roof blasting. According to the rules it is set that the subgrade settlement limit is 0.3 m, and filling rate is 0.85, 0.9 and 0.95. PFC3D explosion model to simulate the blasting was introduced, 7 schemes were put forward for simulating methods of filling body, and the 7 schemes were implemented. The simulation results show that the igneous rock 4 in rock migration process has the function of inhibitting the movement of the …
Structure Optimum Of Packer Slips Based On Test And Numerical Simulation, Xiaohua Zhu, Shengqi Chao, Zulin Liu, Chen Bo, Haibing Tang, Kaifeng Liang
Structure Optimum Of Packer Slips Based On Test And Numerical Simulation, Xiaohua Zhu, Shengqi Chao, Zulin Liu, Chen Bo, Haibing Tang, Kaifeng Liang
Journal of System Simulation
Abstract: The permanent packer is an essential tool for segment fracturing during shale gas exploitation. The structure of the slips directly affects its setting ability. For Y440 type packer, setting and sealing tests were carried out, and the results show that the packer exists slip during sealing operation, which may exacerbates slip and even slip off under the condition of shock and vibration in a wellbore. Finite element models were established based on nonlinear explicit dynamic analysis method. According to the comprehensive evaluation on the stress value, plastic deformation and the slippage of slips with the different tooth …
Simulation Approach To Temperature Measuring Using Image Color Based On Support Vector Regression, Ren Yan, Xiaomin Zhou, Guan Wei, Fu Li, Xinyu Chen
Simulation Approach To Temperature Measuring Using Image Color Based On Support Vector Regression, Ren Yan, Xiaomin Zhou, Guan Wei, Fu Li, Xinyu Chen
Journal of System Simulation
Abstract: As it is all known, it is difficult to measure high temperature directly in complex industrial environment. Thus, a new temperature soft-measuring method based on Support Vector Regression (SVR) was proposed. SVR model was used to fit the complex nonlinear mapping relationship between the feature values of color images of the high temperature object and its temperature. And then the trained model could predict the temperature by inputting the features of colorimages. Simulation results demonstrate that the improved algorithm has excellent generalization ability and predictive ability. What’s more, this model needs less support vectors and learns faster.
On Linear Mmse Based Turbo-Equalization Of Nonlinear Volterra Channels, Yecai Guo, Weiwei Ma, Zhang Shan, Ruizhi Zhou
On Linear Mmse Based Turbo-Equalization Of Nonlinear Volterra Channels, Yecai Guo, Weiwei Ma, Zhang Shan, Ruizhi Zhou
Journal of System Simulation
Abstract: Nonlinear intersymbol interference is one of the important factors affecting the satellite channel, and it is very necessary to eliminate and reduce the effect. On the basis of using the Volterra series decomposition to denote the nonlinear channel, linear Minimum Mean Square Error (MMSE) based Volterra channel turbo equalization algorithm was proposed. In this proposed algorithm, after the linear MMSE equalizer and its two approximation algorithms were derived, the proposed linear MMSE based Volterra channel turbo equalization exact and approximate algorithms could not only eliminate the linear and nonlinear intersymbol interference but also reduce the computation complexity. Simulation results …
Failure Risk Identification Model And Simulation Of Supply Chain Under O2o E-Commerce Model, Zhang Hao, Mingkun Wang
Failure Risk Identification Model And Simulation Of Supply Chain Under O2o E-Commerce Model, Zhang Hao, Mingkun Wang
Journal of System Simulation
Abstract: With the expansion of Online to Offline (O2O) e-commerce market size, how to effectively prevent the occurrence of supply chain failure risk becomes the key factor to ensure O2O e-commerce market to operate well. The key influencing factors of the supply chain failure risk were analyzed and sorted. Based on causal relationship between various influencing factors, Bayesian network was constructed to analyze crucial factors. The application of triangle fuzzy number was introduced to gather value of conditional probability of Bayesian network. A case study on the failure risk identification model of fresh agricultural product supply chain under O2O model …
Optimal Real-Time Pricing Model Of Smart Grid Based On Markov Decision Process, Jiangbo Li, Wang Bo, Gao Yan, Huizhen Zhang
Optimal Real-Time Pricing Model Of Smart Grid Based On Markov Decision Process, Jiangbo Li, Wang Bo, Gao Yan, Huizhen Zhang
Journal of System Simulation
Abstract: Real-time electricity price strategy is the effective means to save electricity and improve user electricity utility value. A real-time electricity price optimization model based on Markov Decision Process was raised. Using finite horizon method, the model structure the mathematical model which makes the expected utility maximum of supply side and demand side, and optimize the existing electricity utility function according to decreasing risk theory which using logarithmic form can describe the power utility of user more accurate. Particle Swarm Optimization was used to solve this model and make the results compare with the situation of fixed power price, the …
Adaptive Dynamic Programming In Raw Meal Fineness Control Of Vertical Mill Grinding Process Based On Extreme Learning Machine, Xiaofeng Lin, Weikai Kong
Adaptive Dynamic Programming In Raw Meal Fineness Control Of Vertical Mill Grinding Process Based On Extreme Learning Machine, Xiaofeng Lin, Weikai Kong
Journal of System Simulation
Abstract: The grinding process of vertical mill raw meal in cement industry features nonlinear, strong coupling and long time-delay, which is difficult to model precisely and implement stable control for raw meal fineness. Against the problem, a production index prediction model of vertical mill raw meal grinding process was established using Extreme Learning Machine (ELM). Adaptive dynamic programming (ADP) was used to control the raw meal fineness, whose action and critic networks were implemented by online sequential extreme learning machine. In the meaning of simulation, the results show that the proposed method is valid and helpful to reduce the …
Research On Control Strategy Of Switched Reluctance Motor Drive System For Mine Electric Locomotive, Xiaoping Zhang, Yanhong Zhou, Zhang Zhu
Research On Control Strategy Of Switched Reluctance Motor Drive System For Mine Electric Locomotive, Xiaoping Zhang, Yanhong Zhou, Zhang Zhu
Journal of System Simulation
Abstract: Due to simple structure features, low cost, small starting current, large starting torque, and reliability, Switched Reluctance Motor (SRM) are very suitable for application in the mine electric locomotive electric transmission system. The basic structure and working principle of SRM were introduced, considering the working characteristics of mine electric locomotive, direct torque control strategy based on adaptive fuzzy PI control was proposed. Design method of the strategy was elaborated, after which simulation verification of control effect and comparison analysis with traditional methods were conducted. Simulation results show that, the control strategy effectively solves the problem of large torque ripple …
Finite Element Simulation Of Ultrasonic Guided Wave To Detect Through-Type Defects In Pipe, Hongwei Hu, Zexiang Wang, Guangkai Sun, Peng Gang
Finite Element Simulation Of Ultrasonic Guided Wave To Detect Through-Type Defects In Pipe, Hongwei Hu, Zexiang Wang, Guangkai Sun, Peng Gang
Journal of System Simulation
Abstract: To get the relationship between the defects and ultrasonic guided wave, the dispersion characteristic of guided wave in pipe was studied. Then the finite element model of a pipe with a through-type defect was established. Taking the axial and circumferential defects with different sizes as research objects, the relationship between the defect location and defect size with the ultrasonic guided wave reflection coefficients was studied, using a control variable method, by finite element simulation. The results show that there is a linear relationship between the circumferential sizes of the defect and the reflection coefficients for through-type defects …
Nacelle Wind Speed Correction Of Wind Turbine Generation Units Based On Wind Speed Measured By Anemometer Tower, Gao Feng, Xiyun Yang, Wang Wei, Zhang Lei
Nacelle Wind Speed Correction Of Wind Turbine Generation Units Based On Wind Speed Measured By Anemometer Tower, Gao Feng, Xiyun Yang, Wang Wei, Zhang Lei
Journal of System Simulation
Abstract: In consideration that there are great calculation errors in theoretical correction of nacelle wind speed, the entire range of wind speed was divided according to changes of control strategies for wind turbine generation unit. The nacelle transfer function (NTF) was defined by higher-order polynomial fitting to identify a method for correcting nacelle wind speed based on wind measurements of the anemometer tower. It doesn’t only overcome problems like poor practicability of IEC standards NTF, but also has higher fitting precision than simple linear fitting without intervals. By introducing intermediate intervals, the problem about discontinuous NTF in different sections …
Measuring Principle Research On Fundamental Wave Of Grid Based On Curve Fitting Model, Liyun Liu, Zhezhao Zeng
Measuring Principle Research On Fundamental Wave Of Grid Based On Curve Fitting Model, Liyun Liu, Zhezhao Zeng
Journal of System Simulation
Abstract: Measuring principle of grid fundamental wave based on algebraic polynomial model is proposed. Its main idea is to optimize parameters of algebraic polynomial model so as to accurately fit the power grid fundamental wave signal to be measured based on the recursive least squares (RLS), and then the steepest descent method was adopted to iteratively calculate zeros of the fitting polynomial model, and then fundamental frequency was obtained according to time difference of the adjacent two zeros. Fundamental wave amplitude could be obtained according to the fitting model values corresponding to the middle of the adjacent two zero points. …