Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6895004
W. Doorsamy, W. Cronje
Predictive maintenance philosophy is fast becoming a norm in industry, where prognostics and diagnostics in electrical machines are essential. The efficiency and reliability of the technique being utilized depend profoundly on measurement accuracy and analysis. Frequency analysis is commonly used in the interpretation of measurements for condition monitoring purposes. This paper presents a study of techniques in frequency analysis in condition monitoring of electrical rotating machines. Different performance characteristics of various spectral estimation techniques are compared for application in incipient fault diagnosis. The study includes an evaluation of a Bayesian spectral estimation method together with more conventional practices such as the standard periodogram, Welch and Music methods. The investigation uses an example of shaft voltage based condition monitoring in machines for a specific case of eccentricity. Results of the study indicate that the Bayesian method, although unconventional in fault diagnostics, is exceptionally robust and exhibits qualities well-suited to the application.
{"title":"A study on Bayesian spectrum estimation based diagnostics in electrical rotating machines","authors":"W. Doorsamy, W. Cronje","doi":"10.1109/ICIT.2014.6895004","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6895004","url":null,"abstract":"Predictive maintenance philosophy is fast becoming a norm in industry, where prognostics and diagnostics in electrical machines are essential. The efficiency and reliability of the technique being utilized depend profoundly on measurement accuracy and analysis. Frequency analysis is commonly used in the interpretation of measurements for condition monitoring purposes. This paper presents a study of techniques in frequency analysis in condition monitoring of electrical rotating machines. Different performance characteristics of various spectral estimation techniques are compared for application in incipient fault diagnosis. The study includes an evaluation of a Bayesian spectral estimation method together with more conventional practices such as the standard periodogram, Welch and Music methods. The investigation uses an example of shaft voltage based condition monitoring in machines for a specific case of eccentricity. Results of the study indicate that the Bayesian method, although unconventional in fault diagnostics, is exceptionally robust and exhibits qualities well-suited to the application.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134454392","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6894898
Ashok Kumar, Vasav Gautam, P. Sensarma
This paper presents a transformer-less, single stage, doubly grounded, buck-boost single phase inverter. The inverter is derived from SEPIC converter by replacing its output side inductor with a coupled inductor. Stand-alone operation of the inverter is discussed with resistive and inductive load. Simulation results are given to validate the operational ability of proposed inverter.
{"title":"A SEPIC derived single stage buck-boost inverter for photovoltaic applications","authors":"Ashok Kumar, Vasav Gautam, P. Sensarma","doi":"10.1109/ICIT.2014.6894898","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6894898","url":null,"abstract":"This paper presents a transformer-less, single stage, doubly grounded, buck-boost single phase inverter. The inverter is derived from SEPIC converter by replacing its output side inductor with a coupled inductor. Stand-alone operation of the inverter is discussed with resistive and inductive load. Simulation results are given to validate the operational ability of proposed inverter.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"3 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131958147","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6894901
H. Kim, J. H. Jung, E. Nho, I. D. Kim, T. Chun, H. Kim
The power loss of a high power voltage disturbance generator is analyzed to design a high efficient generator. The major components of the generator are 3-phase autotransformer, series transformers, and SCR thyristors, which guarantee cost-effective hardware. To maximize the efficiency of the generator the current through these components should be minimized. The only one parameter that can be adjusted to determine the current level is the turn-ratio of the series transformer. Therefore, the power loss analysis is carried out with the variation of the turn ratio.
{"title":"Power loss analysis of 3-phase voltage disturbance generator with variation of series transformer turn-ratio","authors":"H. Kim, J. H. Jung, E. Nho, I. D. Kim, T. Chun, H. Kim","doi":"10.1109/ICIT.2014.6894901","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6894901","url":null,"abstract":"The power loss of a high power voltage disturbance generator is analyzed to design a high efficient generator. The major components of the generator are 3-phase autotransformer, series transformers, and SCR thyristors, which guarantee cost-effective hardware. To maximize the efficiency of the generator the current through these components should be minimized. The only one parameter that can be adjusted to determine the current level is the turn-ratio of the series transformer. Therefore, the power loss analysis is carried out with the variation of the turn ratio.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116429351","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6894947
Li-Na Tang, H. Su, G. Tang
This paper deals with the state observer design problem for a networked control linear system. First, based on a functional transformation to the system output, the networked control system with both network transmission delays of controller-to-actuator and sensor-to-controller was transformed into an equivalent system with only delayed control inputs. Then, by using the transformed system, a state observer for the original networked control system is designed. The design algorithm is proposed and the state estimate accuracy of the state observer is analyzed. Theoretical derivation indicates the state observation error can tend to zero at any decay rate specified in advance. Simulation results show the effectiveness of the proposed design approach.
{"title":"Observer design for networked control systems","authors":"Li-Na Tang, H. Su, G. Tang","doi":"10.1109/ICIT.2014.6894947","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6894947","url":null,"abstract":"This paper deals with the state observer design problem for a networked control linear system. First, based on a functional transformation to the system output, the networked control system with both network transmission delays of controller-to-actuator and sensor-to-controller was transformed into an equivalent system with only delayed control inputs. Then, by using the transformed system, a state observer for the original networked control system is designed. The design algorithm is proposed and the state estimate accuracy of the state observer is analyzed. Theoretical derivation indicates the state observation error can tend to zero at any decay rate specified in advance. Simulation results show the effectiveness of the proposed design approach.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115164863","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6894918
A. Bhattacharya, S. Choudhury
Service composition is one of the key issues in web engineering to satisfy users query on the fly. The efficient composition technique demands low execution time. Moreover, the approach should include the fast delivery of an alternative plan in case of failure in run-time. Most of the existing techniques are unable to deliver any result in case of partial matching with the requirement of the user. In this paper, we have proposed a meta-model in terms of a Graph to work on the above said issues. The Graph that contains information required for composition is prepared offline and is used for generating query specific composition plan. The methodology for finding out the specific composition plan, for partial matching also, is illustrated with an example. The solution is expected to behave in an efficient way in terms of providing dynamic service composition techniques.
{"title":"A Graph based meta-model for speed-up service composition on web","authors":"A. Bhattacharya, S. Choudhury","doi":"10.1109/ICIT.2014.6894918","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6894918","url":null,"abstract":"Service composition is one of the key issues in web engineering to satisfy users query on the fly. The efficient composition technique demands low execution time. Moreover, the approach should include the fast delivery of an alternative plan in case of failure in run-time. Most of the existing techniques are unable to deliver any result in case of partial matching with the requirement of the user. In this paper, we have proposed a meta-model in terms of a Graph to work on the above said issues. The Graph that contains information required for composition is prepared offline and is used for generating query specific composition plan. The methodology for finding out the specific composition plan, for partial matching also, is illustrated with an example. The solution is expected to behave in an efficient way in terms of providing dynamic service composition techniques.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116420140","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6894877
Jeong-Il Kang, Jonghee Han, Sang-Kyoo Han
A high-efficiency boundary conduction mode (BCM) tapped-inductor boost converter for constant output current applications is proposed. Besides the well-known advantages from the BCM operation such as the significantly relieved diode reverse-recovery and switching loss, the proposed converter shows a switching frequency which is insensitive to the output voltage variations. This makes the proposed converter very attractive in small form factor mobile LED driver applications. The circuit is analyzed in detail, and a design guideline is presented. Experimental results from an LED backlight driver prototype for a 14" notebook computer are also presented.
{"title":"High-efficiency boundary conduction mode tapped-inductor boost LED driver","authors":"Jeong-Il Kang, Jonghee Han, Sang-Kyoo Han","doi":"10.1109/ICIT.2014.6894877","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6894877","url":null,"abstract":"A high-efficiency boundary conduction mode (BCM) tapped-inductor boost converter for constant output current applications is proposed. Besides the well-known advantages from the BCM operation such as the significantly relieved diode reverse-recovery and switching loss, the proposed converter shows a switching frequency which is insensitive to the output voltage variations. This makes the proposed converter very attractive in small form factor mobile LED driver applications. The circuit is analyzed in detail, and a design guideline is presented. Experimental results from an LED backlight driver prototype for a 14\" notebook computer are also presented.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123807974","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6895021
Ojo Adejare Akintunde, Ilugbiyin Olalekan Ayodeji
This study focused on the level of penetration of Internet usage among undergraduate students in Nigeria using Obafemi Awolowo University as a case study. Result showed that about 92% of undergraduate students have embraced the Internet and are using it consistently. The online mean time is 3.5 hrs/week while on the average, undergraduate experience of Internet usage is about 4 years. We found also that the students use the Internet mostly for e-mail, information search and online chatting; all of these were found to have significant impact on their academics and social life. Further analysis revealed that gender attitude is also an important issue; male students appear to use the Internet more than their female counterparts; just as science based students use it more than the non-science based students. The paper therefore recommends appropriate policies for all higher schools of learning in Nigeria to facilitate further diffusion and use of the Internet.
{"title":"Assessment of internet usage amongst Nigerian students — A case study approach","authors":"Ojo Adejare Akintunde, Ilugbiyin Olalekan Ayodeji","doi":"10.1109/ICIT.2014.6895021","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6895021","url":null,"abstract":"This study focused on the level of penetration of Internet usage among undergraduate students in Nigeria using Obafemi Awolowo University as a case study. Result showed that about 92% of undergraduate students have embraced the Internet and are using it consistently. The online mean time is 3.5 hrs/week while on the average, undergraduate experience of Internet usage is about 4 years. We found also that the students use the Internet mostly for e-mail, information search and online chatting; all of these were found to have significant impact on their academics and social life. Further analysis revealed that gender attitude is also an important issue; male students appear to use the Internet more than their female counterparts; just as science based students use it more than the non-science based students. The paper therefore recommends appropriate policies for all higher schools of learning in Nigeria to facilitate further diffusion and use of the Internet.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129016935","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6894986
Jonghoon Kim, Dmitry Nikitenkov
This paper investigates a new approach based on the fuzzy logic-controlled methodology that is suitable for analyzing and evaluating large format LiMn2O4 cell performance via online state-of-health (SOH) prediction for energy storage system (ESS) applications. The proposed method for online SOH prediction is comprised of two parts. First of all, the values of the cell resistance R and maximum cell capacity Qmax are calculated from four factors such as voltage, current, time, and temperature that were measured during charge-discharge sequence at unknown temperature. Specifically, in order to minimize of SOH jump and drops with temperature variation, temperature compensation for R normalization is efficiently implemented. Then, using two values R and Qmax previously calculated at unknown temperature, present SOH of an arbitrary LiMn2O4 cell can be predicted using the defined fuzzy-logic inference system. The main advantage of this approach is wide parameters tuning possibility for good correspondence of SOH decay with time, and the possibility to perform suitable online SOH estimation. The proposed model used as part of either a Matlab/Simulink model or an integral part of the battery management system (BMS)-micro controller unit (MCU) of STM32F105VC, was verified by the comparison with experimental data of Samsung SDI 60Ah LiMn2O4 cell and a method for SOH prediction by measuring cell capacity during fully charging/ discharging sequence.
{"title":"Fuzzy logic-controlled online state-of-health (SOH) prediction in large format LiMn2O4 cell for energy storage system (ESS) applications","authors":"Jonghoon Kim, Dmitry Nikitenkov","doi":"10.1109/ICIT.2014.6894986","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6894986","url":null,"abstract":"This paper investigates a new approach based on the fuzzy logic-controlled methodology that is suitable for analyzing and evaluating large format LiMn2O4 cell performance via online state-of-health (SOH) prediction for energy storage system (ESS) applications. The proposed method for online SOH prediction is comprised of two parts. First of all, the values of the cell resistance R and maximum cell capacity Qmax are calculated from four factors such as voltage, current, time, and temperature that were measured during charge-discharge sequence at unknown temperature. Specifically, in order to minimize of SOH jump and drops with temperature variation, temperature compensation for R normalization is efficiently implemented. Then, using two values R and Qmax previously calculated at unknown temperature, present SOH of an arbitrary LiMn2O4 cell can be predicted using the defined fuzzy-logic inference system. The main advantage of this approach is wide parameters tuning possibility for good correspondence of SOH decay with time, and the possibility to perform suitable online SOH estimation. The proposed model used as part of either a Matlab/Simulink model or an integral part of the battery management system (BMS)-micro controller unit (MCU) of STM32F105VC, was verified by the comparison with experimental data of Samsung SDI 60Ah LiMn2O4 cell and a method for SOH prediction by measuring cell capacity during fully charging/ discharging sequence.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129662648","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6895003
H. Park, J. Jeon
This paper proposes a method to implement an image filtering module by using 3×3 mask on FPGA. The 3×3 mask filter module has an advantage of minimizing a usage of memory and a propagation delay from input to output. Depending on coefficient value of 3×3 mask filter module, we can acquire several image processing effects such as mean filtering, median filtering, and edge enhancement. When we applied Laplacian filter to enhance sharpness of an image by using the 3×3 mask filter module, not only edges components but also noise components of an image were enhanced by Laplacian filter. So we propose an adaptive edge enhancement by using Laplacian filter that is a method to enhance edge components except noise components of an image by analyzing a variance of pixel data in 3×3 mask. We applied the adaptive edge enhancement by using Laplacian filter to an infrared camera and conducted an experiment about its effect. The experimental result proves that the proposed method is effective to implement the edge enhancement of an image with minimum usage of memory in real time.
{"title":"FPGA design and implementation of edge enhancement by using 3×3 mask filter","authors":"H. Park, J. Jeon","doi":"10.1109/ICIT.2014.6895003","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6895003","url":null,"abstract":"This paper proposes a method to implement an image filtering module by using 3×3 mask on FPGA. The 3×3 mask filter module has an advantage of minimizing a usage of memory and a propagation delay from input to output. Depending on coefficient value of 3×3 mask filter module, we can acquire several image processing effects such as mean filtering, median filtering, and edge enhancement. When we applied Laplacian filter to enhance sharpness of an image by using the 3×3 mask filter module, not only edges components but also noise components of an image were enhanced by Laplacian filter. So we propose an adaptive edge enhancement by using Laplacian filter that is a method to enhance edge components except noise components of an image by analyzing a variance of pixel data in 3×3 mask. We applied the adaptive edge enhancement by using Laplacian filter to an infrared camera and conducted an experiment about its effect. The experimental result proves that the proposed method is effective to implement the edge enhancement of an image with minimum usage of memory in real time.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126266769","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}
Pub Date : 2014-09-11DOI: 10.1109/ICIT.2014.6894892
Kyeung-cheol Bae, Seong-chon Choi, Ji-Hwan Kim, C. Won, Yong-Chae Jung
This paper proposes dynamic battery modeling for LiFePO4 battery simulator. LiFePO4 battery of Li-ion type battery has best characteristic in other type of batteries. So this paper describes LiFePO4 battery model for battery simulator. LiFePO4 battery's voltage waveform is non-linear and changed by transient load. So the shepherd model is applied to describe this non-linear waveform and thevenin battery model is applied to present characteristics of behavior corresponding to the changing of transient load. Also, in order to apply battery model to battery simulator, proposed battery model is converted to discrete time model. Parameters of proposed battery model are estimated in experimental. The proposed battery model is compared getting the voltage waveforms of the battery using experiment with simulation's waveforms is verified.
{"title":"LiFePO4 dynamic battery modeling for battery simulator","authors":"Kyeung-cheol Bae, Seong-chon Choi, Ji-Hwan Kim, C. Won, Yong-Chae Jung","doi":"10.1109/ICIT.2014.6894892","DOIUrl":"https://doi.org/10.1109/ICIT.2014.6894892","url":null,"abstract":"This paper proposes dynamic battery modeling for LiFePO4 battery simulator. LiFePO4 battery of Li-ion type battery has best characteristic in other type of batteries. So this paper describes LiFePO4 battery model for battery simulator. LiFePO4 battery's voltage waveform is non-linear and changed by transient load. So the shepherd model is applied to describe this non-linear waveform and thevenin battery model is applied to present characteristics of behavior corresponding to the changing of transient load. Also, in order to apply battery model to battery simulator, proposed battery model is converted to discrete time model. Parameters of proposed battery model are estimated in experimental. The proposed battery model is compared getting the voltage waveforms of the battery using experiment with simulation's waveforms is verified.","PeriodicalId":240337,"journal":{"name":"2014 IEEE International Conference on Industrial Technology (ICIT)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126635810","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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