By analyzing the transient short-circuit current and leakage magnetic field in a transformer, it is proposed that the axial short-circuit electric force is a dynamic one. In order to give the force effect on the windings, clamps and pressboards, a mass-spring vibrating system is used as a model for study. The theoretical analysis is verified by simulation using MATLAB. Preventive measures are proposed based on the discussion of reasons for the axial instability in transformers.
{"title":"Stability Analysis of Large Transformer Windings","authors":"Weilu Zhu, Cai-Hong Yan, Lanying Zhao","doi":"10.1109/ICECE.2010.1029","DOIUrl":"https://doi.org/10.1109/ICECE.2010.1029","url":null,"abstract":"By analyzing the transient short-circuit current and leakage magnetic field in a transformer, it is proposed that the axial short-circuit electric force is a dynamic one. In order to give the force effect on the windings, clamps and pressboards, a mass-spring vibrating system is used as a model for study. The theoretical analysis is verified by simulation using MATLAB. Preventive measures are proposed based on the discussion of reasons for the axial instability in transformers.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"127 1","pages":"4235-4238"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80399190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
One of important requirements for many Wireless sensor network applications is to prolong network lifetime. The cluster head consumes more energy than other member nodes, because it gathers data from its member nodes, processes it (e.g. data fusion), and transfers data to the sink node or to the base station that maybe located remotely. Therefore, the cluster head should be elected periodically within the cluster to avoid the quick death of the head node and make all node loads distribute evenly. Based on the extensive analyzing of those algorithms such as LEACH, a cluster algorithm for electing cluster heads based on threshold energy is presented. The lifetime is suggested to be expressed as to both the maximum last node dying time and the minimum time difference between the last node dying and the first node dying. In order to obtain the effect, threshold energy was obtained and evaluated. The threshold energy is related to the initial energy of each node (Eo), number of nodes(n), energy consumption of cluster head (ECch), and energy consumption of cluster members (ECcm). The main purpose is to obtain the maximum network lifetime. What we now have done just to analyse the static threshold energy. When the optimal Dynamic threshold energy is adapted in the algorithm, the lifetime can be prolonged while the performance of network can maintain unabated. Results demonstrate that this algorithm which is more effective routing protocol prolongs the network lifetime when cluster heads are elected with the optimal threshold energy.
{"title":"Cluster Algorithm for Electing Cluster Heads Based on Threshold Energy","authors":"Ying Huang, Cong Huang","doi":"10.1109/ICECE.2010.657","DOIUrl":"https://doi.org/10.1109/ICECE.2010.657","url":null,"abstract":"One of important requirements for many Wireless sensor network applications is to prolong network lifetime. The cluster head consumes more energy than other member nodes, because it gathers data from its member nodes, processes it (e.g. data fusion), and transfers data to the sink node or to the base station that maybe located remotely. Therefore, the cluster head should be elected periodically within the cluster to avoid the quick death of the head node and make all node loads distribute evenly. Based on the extensive analyzing of those algorithms such as LEACH, a cluster algorithm for electing cluster heads based on threshold energy is presented. The lifetime is suggested to be expressed as to both the maximum last node dying time and the minimum time difference between the last node dying and the first node dying. In order to obtain the effect, threshold energy was obtained and evaluated. The threshold energy is related to the initial energy of each node (Eo), number of nodes(n), energy consumption of cluster head (ECch), and energy consumption of cluster members (ECcm). The main purpose is to obtain the maximum network lifetime. What we now have done just to analyse the static threshold energy. When the optimal Dynamic threshold energy is adapted in the algorithm, the lifetime can be prolonged while the performance of network can maintain unabated. Results demonstrate that this algorithm which is more effective routing protocol prolongs the network lifetime when cluster heads are elected with the optimal threshold energy.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"2 1","pages":"2692-2695"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79246292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pulverized coal concentration and velocity of primary air pipe are two important parameters for direct-fired pulverized system, because they influence much on the economics and safety of boiler. This paper mainly introduces a kind of air & coal on-line monitoring system for power plant boiler. The new system makes the use of international advanced technique of AC charge-couple and digital processing. This system overcomes the technique difficulties of air &coal on-line monitoring systems at present. If the system applied in the power plant boiler, it can bring certain economic benefits and have broad industrial popularization and application prospect in the future.
{"title":"Development and Implementation of Air & Coal On-line Monitoring System Based on AC Induction for Power Plant Boiler","authors":"Xue Zhaomei, Jing Xiaoyang","doi":"10.1109/ICECE.2010.207","DOIUrl":"https://doi.org/10.1109/ICECE.2010.207","url":null,"abstract":"Pulverized coal concentration and velocity of primary air pipe are two important parameters for direct-fired pulverized system, because they influence much on the economics and safety of boiler. This paper mainly introduces a kind of air & coal on-line monitoring system for power plant boiler. The new system makes the use of international advanced technique of AC charge-couple and digital processing. This system overcomes the technique difficulties of air &coal on-line monitoring systems at present. If the system applied in the power plant boiler, it can bring certain economic benefits and have broad industrial popularization and application prospect in the future.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"112 1","pages":"807-810"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79404090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper starts with expatiating on the semantic meanings of intelligence, science and technology. Firstly explains the connotation of concepts of the human intelligence, the artificial intelligence, the intelligence science and technology. Secondly discusses the construction of the knowledge system of intelligence science and technology. Thirdly analyzes the elements of the human intelligence science, the artificial intelligence science and the artificial intelligence technology. Lastly sets up the knowledge system of intelligence science and technology by integrating these elements. Some interesting research conclusions are obtained, i.e. the intelligence denotes the intelligent ability; the meaning of intelligence is that human or machine are able to cognize the world and understand it; the knowledge system of intelligence science and technology is composed of two kinds of theories and four kinds of technologies which are the brain theory, the machine reasoning theory, the machine perception technology, the knowledge discovery technology, the expert system technology, and the robot technology.
{"title":"Semantic Analysis on Knowledge System of Intelligence Science and Technology","authors":"Ying-hui Huang, Guan-yu Li","doi":"10.1109/ICECE.2010.459","DOIUrl":"https://doi.org/10.1109/ICECE.2010.459","url":null,"abstract":"This paper starts with expatiating on the semantic meanings of intelligence, science and technology. Firstly explains the connotation of concepts of the human intelligence, the artificial intelligence, the intelligence science and technology. Secondly discusses the construction of the knowledge system of intelligence science and technology. Thirdly analyzes the elements of the human intelligence science, the artificial intelligence science and the artificial intelligence technology. Lastly sets up the knowledge system of intelligence science and technology by integrating these elements. Some interesting research conclusions are obtained, i.e. the intelligence denotes the intelligent ability; the meaning of intelligence is that human or machine are able to cognize the world and understand it; the knowledge system of intelligence science and technology is composed of two kinds of theories and four kinds of technologies which are the brain theory, the machine reasoning theory, the machine perception technology, the knowledge discovery technology, the expert system technology, and the robot technology.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"PP 1","pages":"1868-1871"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84337548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The signals collected by Doppler blood flow instrument have the noise inevitably due to measurement system, signals interference and turbulent flow of blood flow. The chaotic signals are non-stationary signals, and contain some of the peaks and mutations. The denoising method using the traditional Fourier transform analysis is powerless. The wavelet analysis can simultaneously carry on the analysis in the time frequency range to the signals, so that it can more effectively distinguish the mutant part of the signals and noise to achieve signals denoising. This article used threshold denoising principle based on wavelet transform. Denoising signals are reconstructed in order to achieve the denoising purpose. The denoising system applied the db9 wavelet of Matlab7.0 Toolbox and soft denoising method for collection of the primary waveform to wavelet analysis. Results illustrate that this method can extract characteristics of signals effectively and have good value in practice.
{"title":"Denoising Research of Doppler Blood Flow Signals with Wavelet Transform","authors":"Yi-kai Shi, Liang Deng, Qin Yao, Bo Tang","doi":"10.1109/ICECE.2010.1172","DOIUrl":"https://doi.org/10.1109/ICECE.2010.1172","url":null,"abstract":"The signals collected by Doppler blood flow instrument have the noise inevitably due to measurement system, signals interference and turbulent flow of blood flow. The chaotic signals are non-stationary signals, and contain some of the peaks and mutations. The denoising method using the traditional Fourier transform analysis is powerless. The wavelet analysis can simultaneously carry on the analysis in the time frequency range to the signals, so that it can more effectively distinguish the mutant part of the signals and noise to achieve signals denoising. This article used threshold denoising principle based on wavelet transform. Denoising signals are reconstructed in order to achieve the denoising purpose. The denoising system applied the db9 wavelet of Matlab7.0 Toolbox and soft denoising method for collection of the primary waveform to wavelet analysis. Results illustrate that this method can extract characteristics of signals effectively and have good value in practice.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"50 1","pages":"4846-4849"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84454027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Based on ultrasonic principle, the car rain protection airproof performance test method was proposed after the main problems of the current artificial rain test were put forward. In the new method, the detection and evaluation was separated which means that the real-time detection, in the use of ultrasonic, could be achieved as the car enter the venue and according to the on-site analysis of the collected data, by the master computer, the evaluation could be given. The test results show that the new test method would save time and simplify the test procedure and so on.
{"title":"Car Rain Protection Airproof Performace Test Method Based on Ultrasonic","authors":"He Xiao-ming, Liu Wei-juan","doi":"10.1109/ICECE.2010.145","DOIUrl":"https://doi.org/10.1109/ICECE.2010.145","url":null,"abstract":"Based on ultrasonic principle, the car rain protection airproof performance test method was proposed after the main problems of the current artificial rain test were put forward. In the new method, the detection and evaluation was separated which means that the real-time detection, in the use of ultrasonic, could be achieved as the car enter the venue and according to the on-site analysis of the collected data, by the master computer, the evaluation could be given. The test results show that the new test method would save time and simplify the test procedure and so on.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"19 1","pages":"565-568"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84511309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Photovoltaic energy has nowadays an increased importance in electrical power applications. However, the output power provided via the photovoltaic conversion process depends on solar irradiation and temperature. Therefore a multiple-input DC/DC converter is proposed for stand-alone photovoltaic lighting system with battery storage in this paper. Compared with the traditional stand-alone photovoltaic system, which merely use one muti-input biderictional DC/DC converter control the battery charge or discharge effectively, protect battery and prolong its natural life as well as have high conversion efficiency and low cost for photovoltaic lighting system. Muti-input converter implements bi-directional energy transfer in the system, so the key of energy management is control bi-directional converter effectively. Finally the simulation and experimental verifications are also presented.
{"title":"Multiport DC/DC Converter for Stand-alone Photovoltaic Lighting System with Battery Storage","authors":"Shengyong Liu, Xing Zhang, Haibin Guo, Jun Xie","doi":"10.1109/ICECE.2010.950","DOIUrl":"https://doi.org/10.1109/ICECE.2010.950","url":null,"abstract":"Photovoltaic energy has nowadays an increased importance in electrical power applications. However, the output power provided via the photovoltaic conversion process depends on solar irradiation and temperature. Therefore a multiple-input DC/DC converter is proposed for stand-alone photovoltaic lighting system with battery storage in this paper. Compared with the traditional stand-alone photovoltaic system, which merely use one muti-input biderictional DC/DC converter control the battery charge or discharge effectively, protect battery and prolong its natural life as well as have high conversion efficiency and low cost for photovoltaic lighting system. Muti-input converter implements bi-directional energy transfer in the system, so the key of energy management is control bi-directional converter effectively. Finally the simulation and experimental verifications are also presented.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"43 1","pages":"3894-3897"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84545448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The importance of VV & A has been concerned widely. In this paper, a VV & A process model overlay for the development process of a certain guidance simulation system is put forward, and the main purpose, tasks, participant, and usable methods of each activity in VV & A process are focused, after analyzing the functional components and development process of which. The research findings is summary and refining of our efforts, and is stabile foundation for VV & A standards for guidance simulation system.
{"title":"VV & A Process of Guidance Simulation System","authors":"Jiao Peng","doi":"10.1109/ICECE.2010.628","DOIUrl":"https://doi.org/10.1109/ICECE.2010.628","url":null,"abstract":"The importance of VV & A has been concerned widely. In this paper, a VV & A process model overlay for the development process of a certain guidance simulation system is put forward, and the main purpose, tasks, participant, and usable methods of each activity in VV & A process are focused, after analyzing the functional components and development process of which. The research findings is summary and refining of our efforts, and is stabile foundation for VV & A standards for guidance simulation system.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"59 1","pages":"2540-2543"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84572492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Based on PMSM dynamics and nonlinear load characteristics, a new nonlinear speed controller is designed with vector control scheme. The proposed controller was composed of backstepping speed controller and error regulator based on RBF neural network. The former was designed to ensure a desired speed tracking control, and the later was derived to realize the robust adaptive control against load torque variations. A second-order filter is adopted to reduce the speed overshoot in the starting course of PMSM. Backstepping control system of PMSM based on RBF neural network was established in Simulink. With dSPACE system and the external drive circuit, the completed control system hardware-in-loop real-time simulation was achieved successfully. Simulation and experimental results show the backstepping control system of PMSM based on RBF neural network Given in this paper can remain its good speed dynamic tracking performance and strong robustness when load torque disturbances appeared.
{"title":"Backstepping Control of PMSM Based on RBF Neural Network","authors":"Yang Qian, Liu Weiguo, Luo Guangzhao","doi":"10.1109/ICECE.2010.1224","DOIUrl":"https://doi.org/10.1109/ICECE.2010.1224","url":null,"abstract":"Based on PMSM dynamics and nonlinear load characteristics, a new nonlinear speed controller is designed with vector control scheme. The proposed controller was composed of backstepping speed controller and error regulator based on RBF neural network. The former was designed to ensure a desired speed tracking control, and the later was derived to realize the robust adaptive control against load torque variations. A second-order filter is adopted to reduce the speed overshoot in the starting course of PMSM. Backstepping control system of PMSM based on RBF neural network was established in Simulink. With dSPACE system and the external drive circuit, the completed control system hardware-in-loop real-time simulation was achieved successfully. Simulation and experimental results show the backstepping control system of PMSM based on RBF neural network Given in this paper can remain its good speed dynamic tracking performance and strong robustness when load torque disturbances appeared.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"6 1","pages":"5060-5064"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84878289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
On the basis of reasonably simplifying the structure of disc cutter, the rolling force is used as the vibration source and based on equivalent stiffness method, the method to establish a general vibration differential equation of rolling rock in the rolling direction is further discussed. Through theoretical derivation, a conclusion can be drawn that the range of the vibration frequency is ωf-1.414ωf. Finally, taking an experimental disc cutter rolling concrete as the example, under the certain cutting condition, the vibration model is established and then the vibration frequency is calculated which is approximate equal to 17, 000HZ, so as to lay a theoretical foundation for further analyzing the dynamic performance of the cutter in rock-breaking process.
{"title":"Establishment and Dynamic Analysis of Vibration Model of TBM Disc Cutter in the Rolling Direction","authors":"Kui Zhang, Yi-min Xia, Qing Tan, Zhijie Xu","doi":"10.1109/ICECE.2010.234","DOIUrl":"https://doi.org/10.1109/ICECE.2010.234","url":null,"abstract":"On the basis of reasonably simplifying the structure of disc cutter, the rolling force is used as the vibration source and based on equivalent stiffness method, the method to establish a general vibration differential equation of rolling rock in the rolling direction is further discussed. Through theoretical derivation, a conclusion can be drawn that the range of the vibration frequency is ωf-1.414ωf. Finally, taking an experimental disc cutter rolling concrete as the example, under the certain cutting condition, the vibration model is established and then the vibration frequency is calculated which is approximate equal to 17, 000HZ, so as to lay a theoretical foundation for further analyzing the dynamic performance of the cutter in rock-breaking process.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"27 1","pages":"919-921"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84994156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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