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Articles 9571 - 9600 of 11603

Full-Text Articles in Artificial Intelligence and Robotics

Research On Augmented Reality Method Based On Unmarked Recognition, Li Qian, Shangbing Gao, Zhigeng Pan, Zhengwei Zhang, Chenghua Fang, Shengquan Wang Jan 2019

Research On Augmented Reality Method Based On Unmarked Recognition, Li Qian, Shangbing Gao, Zhigeng Pan, Zhengwei Zhang, Chenghua Fang, Shengquan Wang

Journal of System Simulation

Abstract: As a kind of technology of superposing the virtual objects upon reality scene, AR (Augment Reality) expands the information quantity of the actual scene by virtual information. Aiming at the deficiency of previous AR application methods, the AR application method of unmarked recognition based on the optimized filtering was proposed in this paper. In this algorithm, filtering was used for image preprocessing to solve the poor matching efficiency problems of the past recognition algorithms, then three-dimensional model was established in two-dimensional images and the model was rendered in the two-dimensional plane. The experimental results show that, compared with …

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Study On Multi-Objective Collaborative Optimization Of Switched Reluctance Motor Based On Chaos Fruit Fly Optimization Algorithm, Xiaoping Zhang, Shenghua Rao, Zhang Zhu, Zhao Xuan Jan 2019

Study On Multi-Objective Collaborative Optimization Of Switched Reluctance Motor Based On Chaos Fruit Fly Optimization Algorithm, Xiaoping Zhang, Shenghua Rao, Zhang Zhu, Zhao Xuan

Journal of System Simulation

Abstract: Switched reluctance motor (SRM) is difficult to get the best solution due to its complicated process and high professional requirement. Therefore, a collaborative multi-objective optimization method based on chaotic fruit fly algorithm is proposed in the paper. The initial solution is obtained by traditional design method, and the performance is verified by finite element analysis (FEA). The extreme learning machine (ELM) is applied to obtain the non-parameter model of SRM based on the sample data from FEA. The chaotic fruit fly algorithm is proposed for design optimization. Simulation results demonstrate that better coefficient of torque ripple and efficiency can …

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Study On The Effect Of Salt Fog On Polluted Insulator Under Switching Impulse, Jianghai Geng, Zhong Zheng, Jiang Shuo, Fangcheng Lü, Yunpeng Liu, Songsong Zhou Jan 2019

Study On The Effect Of Salt Fog On Polluted Insulator Under Switching Impulse, Jianghai Geng, Zhong Zheng, Jiang Shuo, Fangcheng Lü, Yunpeng Liu, Songsong Zhou

Journal of System Simulation

Abstract: Water is mixed with soluble conductive material in haze so that the air has certain conductivity, resulting in extra mixed pollution components on the surface of the existing polluted insulator. In this paper, with the XP10-160 ceramic suspension insulator being used as the sample, the switching impulse test of the clean and polluted insulator is carried out by simulating high conductivity fog under the natural environment by salt fog method. This paper analysis the flashover characteristics of switching impulse under different salt density and water fog conductivity. The effect of high conductivity fog on the field intensity distribution of …

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Research Of Nonlinear Time Series Prediction Method For Motion Capture, Tianyu Huang, Yunying Guo Jan 2019

Research Of Nonlinear Time Series Prediction Method For Motion Capture, Tianyu Huang, Yunying Guo

Journal of System Simulation

Abstract: In this paper, we study the nonlinear time series prediction method for action capture. A prediction method based on the capture data is studied and implemented by analyzing human motion data to solve the data loss and correction problem caused by sensor failure. Based on this research purpose, the simulation experiment assumes that a sensor in the sequence of actions fails, then uses eight kinds of machine learning methods, and evaluates them with six indexes. The prediction results of different methods are compared and the predicted motions are visualized. Through the experiments, data prediction accuracy by random forest, decision …

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Simulation Evaluation Method Of Mission Sustainability For Operational Unit, Yan Xu, Junhai Cao, Tailiang Song, Gao Long, Zhang Qiang Jan 2019

Simulation Evaluation Method Of Mission Sustainability For Operational Unit, Yan Xu, Junhai Cao, Tailiang Song, Gao Long, Zhang Qiang

Journal of System Simulation

Abstract: To analyze and evaluate support capabilities of operational units and scientifically describe the operational mission sustainability of weapon systems, the typical mission models for individual operational unit and operational units were established according to system engineering ideology. The mission status of operational units was defined, and the parameters including mission sustainability and equipment availability of operational units were proposed. An operational unit mission process simulation model was established with the agent-based method, which provides a simulation method for operational unit mission sustainability evaluation and technical means for the operational unit support capability assessment problem. A case study of …

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Model Of Target Assignment In Joint Fire Strike Operations, Chen Hui, Yaping Ma Jan 2019

Model Of Target Assignment In Joint Fire Strike Operations, Chen Hui, Yaping Ma

Journal of System Simulation

Abstract: The assignment of firepower resources in combination to the target is one of the key problems in planning work of joint fire strike operations. According to the characteristics of joint fire strike target assignment problem, and synthetically considering the factors such as strike sequence, damage grade, threats, cost-effectiveness, damage, a multi-objective optimization model of target assignment problem is established. By combining the MOEA/D and the multi-level co-evolutionary framework, a multi-objective optimization model is proposed to solve the target assignment based on the multi-level cooperative MOEA/D algorithm, and the related genetic evolution mechanism is designed. The simulation …

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Asymmetry Investigation On Radial Tire Contact Pressure Distribution, Haibo Huang, Xudong Yu, Jinpeng Liu, Yao Zhen Jan 2019

Asymmetry Investigation On Radial Tire Contact Pressure Distribution, Haibo Huang, Xudong Yu, Jinpeng Liu, Yao Zhen

Journal of System Simulation

Abstract: The asymmetric pressure distribution in tire contact patch has significant impact on the vehicle fuel economy, tire wear and tire dynamics. In this paper, a FEA model for 205/55R16 semi-steel radial tire was built and verified by static pressure experiments. The influences of tire structural parameters and vehicle driving parameters on asymmetry factor for exploring the asymmetry of the pressure distribution in contact patch were investigated in the steady-state rolling condition. The results show that the influence of the parameters ranging from +50% to -50% on the asymmetry factor of the contact pressure distribution is nonlinear. The impact order …

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Multi-Objective Optimization Of The Main Circuit And Control Parameters Of The Buck-Boost Matrix Converter, Xiaoping Zhang, Wenhao Song, Hongping Zhu Jan 2019

Multi-Objective Optimization Of The Main Circuit And Control Parameters Of The Buck-Boost Matrix Converter, Xiaoping Zhang, Wenhao Song, Hongping Zhu

Journal of System Simulation

Abstract: The optimization of main circuit parameters and control parameters of the Buck-Boost matrix converter has been investigated. The study takes the main circuit parameters and control parameters as optimization object and takes the harmonic distortion of output voltage, capacitance voltage deviation and inductance current deviation of the converter as optimization target. Firstly, multi-objective optimization satisfaction function is established correspondingly. Meanwhile, the fitness function is built and solved to achieve a set of optimizing parameters based on the fruit fly algorithm, which makes each optimizing target achieve synergistic optimal. Finally, the optimization effect is verified by simulation. The results show …

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Modeling And Analysis For Underwater High-Speed Supercavitaing Torpedo, He Zhen, Aiping Pang, Jinghua Wang, Fanwei Meng, Guangxiong Wang Jan 2019

Modeling And Analysis For Underwater High-Speed Supercavitaing Torpedo, He Zhen, Aiping Pang, Jinghua Wang, Fanwei Meng, Guangxiong Wang

Journal of System Simulation

Abstract: Supercavitation technology can significantly reduce skin-friction drag of underwater torpedo, and therefore dramatically increase the velocity and attack power of underwater weapons. Because the torpedo is almost entirely enveloped by a supercavity, the hydrodynamic problems of the high-speed supercavitating torpedo (HSST) are complex. The hydrodynamic forces acting on cavitator, fin, and the planing force along the longitude plane of the underwater HSST are analyzed. A benchmark nonlinear dynamics model of supercavitating torpedo is established based on the basic dynamic equations of the longitude plane, and the specific parameters of HSST are calculated. In the longitude plane the motion equation …

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In-Cylinder Process Simulation Of Swashplate Revoloving Cylinder Piston Engine Based On Fluid-Structure Interaction, Li Xin, Chengshi Yang, Peng Bo Jan 2019

In-Cylinder Process Simulation Of Swashplate Revoloving Cylinder Piston Engine Based On Fluid-Structure Interaction, Li Xin, Chengshi Yang, Peng Bo

Journal of System Simulation

Abstract: Using dynamic mesh technology, In-cylinder working process of the engine is detailedly designed in this article regarding the new swashplate revolving cylinder piston engine. We establish the numeral simulation model of the engine working process based on fluid-structure interaction, the pressure and temperature distribution of the In-cylinder gas in the six thermal process is obtained, and the temperature distribution of the hot end components is presented. The results show that the working process of the engine is reasonably organized. The biggest thermal load appears in the intake flow process. The wall temperature of the gas side is lower …

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Numerical Simulation Of Thermal Properties Of Active Phased Array Antenna, Wang Yong, Ting Lu, Longwen Wu, Changwu Xiong, Weng Xia, Ping'an Du Jan 2019

Numerical Simulation Of Thermal Properties Of Active Phased Array Antenna, Wang Yong, Ting Lu, Longwen Wu, Changwu Xiong, Weng Xia, Ping'an Du

Journal of System Simulation

Abstract: The grid priority modeling and multi-level meshing techniques are applied to analyze the thermal properties of the active phased array antenna with the micro/mini channels cooling method for simplifying modeling process, reducing the mesh quantity and saving the cost of computation effectively. The multi-level meshing technique can refine the mesh near the boundary of the complex components significantly without changing the mesh quantity in the model, which improves the mesh’s quality obviously. Through the thermal simulation and experiment measurement of the antenna, the temperature and pressure field are obtained. It is proved that the addressed approach can …

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Abnormal Behavior Detection Via Super-Pixels Time Context Feature, Chen Ying, Dandan He Jan 2019

Abnormal Behavior Detection Via Super-Pixels Time Context Feature, Chen Ying, Dandan He

Journal of System Simulation

Abstract: In order to accurately locate the abnormal behavior, an anomaly detection method based on time context features of super-pixels is proposed. For feature representation, the video frames are firstly segmented into super-pixels. The super-pixels of foreground are then selected according to their pixel ratios of foreground. Super-pixels matching adjacent frames are selected based on the gray-level histogram and the information of location to enhance the temporal context of super-pixel features. The statical value of multilayer histogram of optical flow of matched super-pixels are taken as the feature for detection. In the phase of detection, the sparse combination learning algorithm …

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An Anti-Occlusion Adaptive Particle Filtering Algorithm, Li Ju, Mingwei Cao, Yu Ye, Xia Yu, Lifan Zhou Jan 2019

An Anti-Occlusion Adaptive Particle Filtering Algorithm, Li Ju, Mingwei Cao, Yu Ye, Xia Yu, Lifan Zhou

Journal of System Simulation

Abstract: Considering the influence of local occlusion on particle filter tracking algorithm, an anti occlusion adaptive particle filtering algorithm is proposed. It adopts a rectangle as the tracking window, and uses the K mean clustering algorithm to complete particle clustering in resampling, and then obtains the particle subgroup. It estimates the final state according to particles subgroups, and modifies the tracking window. When the area changes more than 5%, the tracking window maintains the same as the one in last frame. Otherwise, the tracking window will change according to the size of moving object, which is a self-adaptation process. At …

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Fusing Local And Global Features For Human Action Recognition, Tang Chao, Miaohui Zhang, Li Wei, Cao Feng, Xiaofeng Wang, Xiaohong Tong Jan 2019

Fusing Local And Global Features For Human Action Recognition, Tang Chao, Miaohui Zhang, Li Wei, Cao Feng, Xiaofeng Wang, Xiaohong Tong

Journal of System Simulation

Abstract: Recognizing human actions according to video features is an important research topic in a wide scope of applications. In this paper, we propose a robust human motion detection method that combines canny operator with the combination of local and global optic flow methods. Meanwhile, this paper presents a simple but efficient action recognition algorithm using fusion visual features. The mixed features fuse two action descriptors, namely centre distance-based space time interest point and curvature function-based Fourier descriptors. The frame-based human action classifier is developed using random forests algorithm. Experimental results show that the proposed method is accurate, efficient and …

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Three-Dimensional Imaging Modeling And Simulation Of Ships Based On Wide-Band Monopulse Radar, Guijie Diao, Xiaojian Xu, Ni Hong, Junjie Lu Jan 2019

Three-Dimensional Imaging Modeling And Simulation Of Ships Based On Wide-Band Monopulse Radar, Guijie Diao, Xiaojian Xu, Ni Hong, Junjie Lu

Journal of System Simulation

Abstract: A three-dimensional imaging model for ship target on sea surface is developed based on wide-band monopulse radar system and synthetic aperture radar (SAR) system. The time-varying electromagnetic (EM) scattering of ships is calculated according to the SAR geometry and the monopulse antenna model. The signal received by every antenna element is obtained, and then, the time-domain signals in the sum, azimuth and elevation difference channels are established. Through analyzing the three-dimensional image results in different grazing angles, the model validity is demonstrated.

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Research On Parametric Modeling Of Radar Electronic Warfare Visual Simulation, Jinliang Guo, Zhang Yang, Xiaoyan Li, Xue Yuan Jan 2019

Research On Parametric Modeling Of Radar Electronic Warfare Visual Simulation, Jinliang Guo, Zhang Yang, Xiaoyan Li, Xue Yuan

Journal of System Simulation

Abstract: In order to improve the versatility of electronic warfare scene simulation and reduce the repeated development, a parametric modeling approach was proposed. Based on the visual simulation development model of Vega Prime, the modular simulation architecture was designed to provide a unified design structure for parametric modeling. The method of parameter extraction and description was researched to standardize the design of simulation model parameters. Parameter constraint rules were researched to associate model parameters, avoid the conflict between parameters, and simplify parameter instantiation. A parametric visual simulation system of electronic warfare was designed and implemented. The parametric modeling process …

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Key Techniques Of Remote Visualization Of 3d Seismic Volume Supporting Multi-User, Lianen Ji, Zhao Ni, Shiyi Liang, Huang Bo Jan 2019

Key Techniques Of Remote Visualization Of 3d Seismic Volume Supporting Multi-User, Lianen Ji, Zhao Ni, Shiyi Liang, Huang Bo

Journal of System Simulation

Abstract: During the remote visualization of large-scale seismic volume for multi-user concurrent interaction, traditional task scheduling approaches could lead to large amount of I/O operation and repetitive calculation of volume texture blocks. So, a more efficient multi-task scheduling strategy was proposed, which rearranged the schedule order of volume rendering tasks through computing their viewpoint correlation. Furthermore, an optimized design of LRU based on parallel protection lock was made. In order to improve the network transmission efficiency and quality of seismic visualization image simultaneously, and to meet the requirement of users to observe the region of interest (ROI) preferentially, the …

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Real-Time Video Webgis With Virtual-Reality Fusion, Yihao Yu, Tan Chong, Zhou Zhong, Wu Wei Jan 2019

Real-Time Video Webgis With Virtual-Reality Fusion, Yihao Yu, Tan Chong, Zhou Zhong, Wu Wei

Journal of System Simulation

Abstract: At present, smart cities have already become an important trend of urban governance in the information era. As an effective display method to the smart cities, augmented virtual environment technology has long been a common concern of researchers. However most of current augmented virtual environment technologies have the disadvantages of high hardware requirements, poor cross-platform capability, so it is difficult to promote to the common users. To solve this problem, in this paper, we put forward a fusion method based on WebGL, which combines the real-time monitor video stream with the 3D geographic scene, resulting in an augmented …

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Research On Open Cell Effect Based On Vacation Queueing Model, Wenwen Pan, Bingyu An, Zangbo Chi, Mingmin Zhang, Zhuxin Hu Jan 2019

Research On Open Cell Effect Based On Vacation Queueing Model, Wenwen Pan, Bingyu An, Zangbo Chi, Mingmin Zhang, Zhuxin Hu

Journal of System Simulation

Abstract: The paper analyzes the related influence factors when closed residential area is open to its surrounding roads. Using the traffic flow theory, the evaluation system of AHP and vacation queuing model based on Markov chain are established. After describing and quantifying the road traffic impact about the open community, we put forward some suggestions about the open of closed residential community. At the same time, the evaluation and improvement rate are proposed under different conditions such as changing the structure of the community, changing the surrounding road structure and changing the traffic flow off. In consideration of traffic lights, …

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Operational Evaluation Of Traffic Guidance Systems Based On Multi-Agent-Based Simulation, Keshuang Tang, Hengjia Zhang, Yixie Bowen Jan 2019

Operational Evaluation Of Traffic Guidance Systems Based On Multi-Agent-Based Simulation, Keshuang Tang, Hengjia Zhang, Yixie Bowen

Journal of System Simulation

Abstract: To study the optimization effect of variable message sign-based traffic guidance system on the utilization efficiency of transportation resource, the multi-agent-based model is used to develop simulation and evaluation platform. The simulation experiments of three typical traffic guidance strategies are carried out. The effect of guidance is evaluated by the indexes as average driving time, average searching time for parking lot and parking failure rate. The result shows that the driving and parking guidance can help reduce the average driving time and the parking failure rate respectively. The influence of the traffic guidance system on the traffic operation status …

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Master-Slave Control Method Of Dexterous Hands Based On Data Glove, Kangjun Pan Jan 2019

Master-Slave Control Method Of Dexterous Hands Based On Data Glove, Kangjun Pan

Journal of System Simulation

Abstract: With the limitations of artificial intelligence, automatic control, and sensor, the dexterous hand in unstructured environments is still very difficult to achieve fully autonomous operation. A master-slave control method of dexterous hands with the combination of data glove and stepper motors is proposed. By the CybergloveII device, human finger joints’ motion data is gathered in real time, then, the motion data are matched to the dexterous hand’ joints respectively. A communication protocol is designed to transfer the motion data between the PC and the ICB. Lastly, the motion data are transferred to the ICB through a serial interface and …

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Rgbd Image Co-Segmentation Via Saliency Detection And Graph Cut, Xiaoyang Li, Lili Wan, Henan Li, Shenghui Wang Jan 2019

Rgbd Image Co-Segmentation Via Saliency Detection And Graph Cut, Xiaoyang Li, Lili Wan, Henan Li, Shenghui Wang

Journal of System Simulation

Abstract: In order to solve the problem that it is difficult to accurately segment images with similar colors in the foreground, we propose a RGBD image co-segmentation algorithm that utilizes saliency detection and graph cut. Our algorithm not only achieves the co-segmentation of multiple images, but also uses depth data to solve the foreground and background confusion problem caused by color similarity. Depth is incorporated into a superpixel segmentation algorithm to change each RGBD image into a set of superpixel blocks. A graph model of superpixels is constructed and saliency detection is used to extend the seed nodes area. The …

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Analysis Of Fuzzy Control Constant Current Charging Characteristic For Breaking And Making Capacitor Of Permanent Magnet Circuit Breaker, Peng Jin, Xianbing Wang, Xiangao Wang, Xichen Ye, Wang Huan Jan 2019

Analysis Of Fuzzy Control Constant Current Charging Characteristic For Breaking And Making Capacitor Of Permanent Magnet Circuit Breaker, Peng Jin, Xianbing Wang, Xiangao Wang, Xichen Ye, Wang Huan

Journal of System Simulation

Abstract: In order to realize the precise control of breaking and making capacitors constant current charging for the permanent magnet (PM) circuit breaker, a fuzzy constant current charging technology of breaking and making capacitors is put forward. On the basis of analyzing the working characteristics for breaking and making capacitors constant current charging, the membership functions of current deviation e, deviation changing rate ec and output variable u for breaking and making capacitors constant current and fuzzy control rules are set up. The establishment of a two-dimensional lookup table replacing the complex fuzzy control algorithm can effectively improve the …

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Physically-Based Interactive Virtual Clothing Animation Simulation, Shi Min, Junzheng Wang, Tianlu Mao, Yaning Liu Jan 2019

Physically-Based Interactive Virtual Clothing Animation Simulation, Shi Min, Junzheng Wang, Tianlu Mao, Yaning Liu

Journal of System Simulation

Abstract: Realistic effective clothing animation simulation involves many factors, including the lifelike animation rendering, stable animation modeling, interaction control of the adjustable parameter and so on. An interactive clothing animation method based on physics is studied. According to the content feature of model and animation resources, we design an effective way of storage and provide the interface to adjust the parameters interactively. We build implicit constraint dynamics system, accelerated collision detection and the constrained optimization calculation model, and calculate clothing animation. The simulation based on Unity 3D engine is rendered to present garment animation simulation effect under different virtual light. …

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Volume Rendering For Ct Images Based On 3d Gradient Amplitude, Luo Ming, Shuifa Sun, Liwen Wang, Fangmin Dong Jan 2019

Volume Rendering For Ct Images Based On 3d Gradient Amplitude, Luo Ming, Shuifa Sun, Liwen Wang, Fangmin Dong

Journal of System Simulation

Abstract: In order to maintain the partial shape characteristics of the three-dimensional space of interest in the process of CT images volume rendering, a transfer function method based on the three dimensional gradient amplitude is proposed. Edge detection and denoising segmentation are employed to obtain the complete edge structure of the interested area. The distance between the image sequences pixels and the edge in the body data is calculated, so that the framework can be formed with the distance data brought into the Kindlmann transfer function. Therefore, a new transfer function is achieved. The comparison experiment with semi-automatic transfer function …

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Research On Inner And Outer Loop Control Of Active Suspension With Linear Motor, Farong Kou, Fang Tao, Ren Quan, Chen Long Jan 2019

Research On Inner And Outer Loop Control Of Active Suspension With Linear Motor, Farong Kou, Fang Tao, Ren Quan, Chen Long

Journal of System Simulation

Abstract: In order to improve the dynamic performance of active suspension with linear motor, the control strategy of LQR control and quasi proportional resonance control was designed. A two-degree-of-freedom vehicle model with active suspension and a linear motor mathematical model were established, and the correctness of the linear motor model was verified by experiments. The influence of the inner loop controller parameters on the controller performance and the response characteristics of the linear motor were analyzed by Matlab/simulink, and the parameters of the inner and outer loop controller were determined. The PID control and quasi proportional resonant control were …

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Virtual Vascular Stent Implantation Model Based On Fbs, Chenxi Huang, Yongtao Hao, Haowei Xing, Chen Fei Jan 2019

Virtual Vascular Stent Implantation Model Based On Fbs, Chenxi Huang, Yongtao Hao, Haowei Xing, Chen Fei

Journal of System Simulation

Abstract: Vascular stent intervention can expand the narrow coronary artery. Doctors analyze the patient's two-dimensional vascular images based on experience and select the stent. In this paper, vascular stent implantation is modeled and analyzed by Function-Behavior-Structure. The stent model is established by virtual reality modeling language and the stent implantation process is simulated. By combining FBS product design method with the virtual reality interaction technology, the virtual stent selection and implantation are adjusted until getting the best result. The prototype system can establish a personalized implantation model. The stent is selected accurately based on the specificity of patient's …

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Research On Modeling And Simulation Of Ac/Dc Hybrid Power Distribution System, Ye Peng, Li Shan, Sun Feng, Han Yue, Zhang Tao, Jiajue Li Jan 2019

Research On Modeling And Simulation Of Ac/Dc Hybrid Power Distribution System, Ye Peng, Li Shan, Sun Feng, Han Yue, Zhang Tao, Jiajue Li

Journal of System Simulation

Abstract: As DC loads and power supply are more and more applications in the grid, AC/DC power distribution system is the future development trend of the low voltage power grid. The modeling and simulation of AC/DC hybrid power distribution system are studied in this paper. Considering the power control, DC bus voltage control and DC power supply and load access, the hierarchical control model of voltage source converter for AC / DC hybrid distribution system and the control strategy of each layer are proposed, and on this basis, the mathematical model of each module is established. Based on PSCAD electromagnetic …

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Optimization Of Material Release For Printed Circuit Board Template Based On Data Mining, Shengping Lü, Qiangsheng Yue, Liu Tao Jan 2019

Optimization Of Material Release For Printed Circuit Board Template Based On Data Mining, Shengping Lü, Qiangsheng Yue, Liu Tao

Journal of System Simulation

Abstract: Data mining were employed for the optimization of material release of PCB (Printed Circuit Board) template. PCB scrap ratio related parameters were specified and prediction model variables were chosen according to hypothesis test. Multiple linear regression (MLR), Chi-squared automatic interaction detector, artificial neural network and support vector machine approaches for the prediction of scrap ratio were employed. Evaluation indictors called as superfluous ratio, supplement release ratio and weighted sum of the two were presented; the material release simulation was conducted and then the four approaches were compared and MLR was taken as the preferred one. Adjust coefficient …

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Airframe Damage Region Division Evaluation Method Based On Boundary Grid Gradient, Shuyu Cai, Lizhong Shi Jan 2019

Airframe Damage Region Division Evaluation Method Based On Boundary Grid Gradient, Shuyu Cai, Lizhong Shi

Journal of System Simulation

Abstract: In order to provide decision support for efficiently choosing and evaluating airframe damage region division methods, the characteristic of airframe damage region was analyzed, evaluating indicator of damage image division-boundary grid gradient was established. By introducing entropy method, combining with indicator of boundary grid gradient, the optimization of TOPSIS was presented, and the evaluation system of airframe damage region division was completely established. Airframe damage region division evaluation experiments were performed by different gray level entropy threshold of damage division image. Experimental results showed that, the proposed method efficiently represented division status of damage adjacency region, and avoided the …

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