Pub Date : 2015-11-26DOI: 10.1109/NUICONE.2015.7449615
Parmar Prashant, A. Joshi, Vaibhav Gandhi
A brain-computer interface (BCI), also referred to as a mind-machine interface (MMI) or a brain-machine interface (BMI), provides a non-muscular channel of communication between the human brain and a computer system. With the advancements in low-cost electronics and computer interface equipment, as well as the need to serve people suffering from disabilities of neuromuscular disorders, a new field of research has emerged by understanding different functions of the brain. The electroencephalogram (EEG) is an electrical activity generated by brain structures and recorded from the scalp surface through electrodes. Researchers primarily rely on EEG to characterise the brain activity, because it can be recorded non-invasively by using portable equipment. The EEG or the brain activity can be used in real time to control external devices via a complete BCI system. A typical BCI scheme generally consists of a data acquisition system, pre-processing of the acquired signals, feature extraction process, classification of the features, post-processing of the classifier output, and finally the control interface and device controller. The post-processed output signals are translated into appropriate commands so as to control output devices, with several applications such as robotic arms, video games, wheelchair etc.
{"title":"Brain computer interface: A review","authors":"Parmar Prashant, A. Joshi, Vaibhav Gandhi","doi":"10.1109/NUICONE.2015.7449615","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449615","url":null,"abstract":"A brain-computer interface (BCI), also referred to as a mind-machine interface (MMI) or a brain-machine interface (BMI), provides a non-muscular channel of communication between the human brain and a computer system. With the advancements in low-cost electronics and computer interface equipment, as well as the need to serve people suffering from disabilities of neuromuscular disorders, a new field of research has emerged by understanding different functions of the brain. The electroencephalogram (EEG) is an electrical activity generated by brain structures and recorded from the scalp surface through electrodes. Researchers primarily rely on EEG to characterise the brain activity, because it can be recorded non-invasively by using portable equipment. The EEG or the brain activity can be used in real time to control external devices via a complete BCI system. A typical BCI scheme generally consists of a data acquisition system, pre-processing of the acquired signals, feature extraction process, classification of the features, post-processing of the classifier output, and finally the control interface and device controller. The post-processed output signals are translated into appropriate commands so as to control output devices, with several applications such as robotic arms, video games, wheelchair etc.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131080955","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449633
Aesha Sheth, C. Kotwal, S. Pujara
Voltage instability in power system is a major issue in electrical power system operation. Voltage instability occurs mainly due to deficit of reactive power at load buses during some contingency or under increased loading condition. Flexible AC Transmission System (FACTS) devices can improve the voltage stability with reduction of losses and generation cost. Thyristor Controlled Series Compensator (TCSC) is a series FACTS device, which can improve voltage stability with improved power transfer capability of the transmission line. Like other FACTS devices, TCSC is costly and it is required to find its optimal location and size for improvement of voltage stability. Here Particle Swarm Optimization (PSO) and PSO with time varying acceleration coefficient (PSO-TVAC), used to locate a TCSC of an optimum rating for voltage stability improvement of power system. Line Stability Index (LSI) is considered here for optimization purpose which provides the information about the stability condition of a power system and its proximity to voltage collapse. The analysis has been demonstrated on a standard IEEE 6-bus system with some modification in load data and overloading condition using MATLAB. PSO-TVAC gives fast convergence than PSO.
{"title":"Optimal placement of TCSC for improvement of static voltage stability","authors":"Aesha Sheth, C. Kotwal, S. Pujara","doi":"10.1109/NUICONE.2015.7449633","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449633","url":null,"abstract":"Voltage instability in power system is a major issue in electrical power system operation. Voltage instability occurs mainly due to deficit of reactive power at load buses during some contingency or under increased loading condition. Flexible AC Transmission System (FACTS) devices can improve the voltage stability with reduction of losses and generation cost. Thyristor Controlled Series Compensator (TCSC) is a series FACTS device, which can improve voltage stability with improved power transfer capability of the transmission line. Like other FACTS devices, TCSC is costly and it is required to find its optimal location and size for improvement of voltage stability. Here Particle Swarm Optimization (PSO) and PSO with time varying acceleration coefficient (PSO-TVAC), used to locate a TCSC of an optimum rating for voltage stability improvement of power system. Line Stability Index (LSI) is considered here for optimization purpose which provides the information about the stability condition of a power system and its proximity to voltage collapse. The analysis has been demonstrated on a standard IEEE 6-bus system with some modification in load data and overloading condition using MATLAB. PSO-TVAC gives fast convergence than PSO.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125041055","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449632
Ankit Sharma, D. Adhyaru, T. Zaveri, Priyank Thakkar
Gujarati is one of the ancient Indian languages spoken widely by the people of Gujarat state. This paper is concerned with the recognition of handwritten Gujarati numerals. For recognition of Gujarati numerals zoning based Feature extraction method is used. Numeral image is divided in 16×16, 8×8, 4×4 and 2×2 Zones. After feature extraction through the zoning method, Naive Bayes classifier and multilayer feed forward neural network classifier are implemented for the classification of numerals. For the database generation, 14,000 samples of each numeral are used. The overall recognition rates of this method used for recognition of Gujarati numeral using 16×16, 8×8, 4×4 and 2×2 zoning with neural network are 93.03%, 95.92%, 91.89% and 61.78% and with Naive Bayes classifier are 75%, 85.60%, 81% and 53.75% respectively.
{"title":"Comparative analysis of zoning based methods for Gujarati handwritten numeral recognition","authors":"Ankit Sharma, D. Adhyaru, T. Zaveri, Priyank Thakkar","doi":"10.1109/NUICONE.2015.7449632","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449632","url":null,"abstract":"Gujarati is one of the ancient Indian languages spoken widely by the people of Gujarat state. This paper is concerned with the recognition of handwritten Gujarati numerals. For recognition of Gujarati numerals zoning based Feature extraction method is used. Numeral image is divided in 16×16, 8×8, 4×4 and 2×2 Zones. After feature extraction through the zoning method, Naive Bayes classifier and multilayer feed forward neural network classifier are implemented for the classification of numerals. For the database generation, 14,000 samples of each numeral are used. The overall recognition rates of this method used for recognition of Gujarati numeral using 16×16, 8×8, 4×4 and 2×2 zoning with neural network are 93.03%, 95.92%, 91.89% and 61.78% and with Naive Bayes classifier are 75%, 85.60%, 81% and 53.75% respectively.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"245 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116150328","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449614
P. Pranav, Pinky J. Brahmbhatt, U. Rao
Present day long format sensors generate a large volume of data thus demanding high-speed data acquisition systems, processing and real-time image display. USB owing to it's features like high data transmission, plug and play, hot plugging, portability, simple interface etc. is best suited for such applications with minimum power and real estate. An attempt is made to design USB based PC peripheral for data acquisition systems/ PC peripheral thus eliminating bulky conventional data acquisitions systems and to design USB (FT2232H) based data acquisition (DAQ) system. Analog front-end device (AFE) with 16-bit ADC is used to quantify analog to 16-bit digital data at 10MSps. `LabVIEW' is a graphical programming environment used for real-time data acquisition, processing and display. This paper summarizes details on design aspects of DAQ system and test results. The developed hardware is low cost, portable, miniaturized, and reliable even at high speeds thus giving an edge over contemporary bulky DAQ systems.
{"title":"USB based high speed data acquisition system","authors":"P. Pranav, Pinky J. Brahmbhatt, U. Rao","doi":"10.1109/NUICONE.2015.7449614","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449614","url":null,"abstract":"Present day long format sensors generate a large volume of data thus demanding high-speed data acquisition systems, processing and real-time image display. USB owing to it's features like high data transmission, plug and play, hot plugging, portability, simple interface etc. is best suited for such applications with minimum power and real estate. An attempt is made to design USB based PC peripheral for data acquisition systems/ PC peripheral thus eliminating bulky conventional data acquisitions systems and to design USB (FT2232H) based data acquisition (DAQ) system. Analog front-end device (AFE) with 16-bit ADC is used to quantify analog to 16-bit digital data at 10MSps. `LabVIEW' is a graphical programming environment used for real-time data acquisition, processing and display. This paper summarizes details on design aspects of DAQ system and test results. The developed hardware is low cost, portable, miniaturized, and reliable even at high speeds thus giving an edge over contemporary bulky DAQ systems.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122871530","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449622
Pradip Panchal, Palak Patel, V. Thakkar, Rachna Gupta
This paper presents an effective approach for the application of Face Recognition using Local Binary Pattern operator. The face image is firstly divided in to the sub regions to generate the locally enhanced Local Binary Histogram, which provide the features information on pixel level by creating LBP labels for histogram. Global Local Binary Histogram for the entire face image is obtained by concatenating all the individual local histograms. As a pre-processing technique the differential excitation of pixel is used to make the algorithm invariant to the illumination changes. The performance of the algorithm is verified under constrains like pose, illumination and expression variation.
{"title":"Pose, illumination and expression invariant face recognition using laplacian of Gaussian and Local Binary Pattern","authors":"Pradip Panchal, Palak Patel, V. Thakkar, Rachna Gupta","doi":"10.1109/NUICONE.2015.7449622","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449622","url":null,"abstract":"This paper presents an effective approach for the application of Face Recognition using Local Binary Pattern operator. The face image is firstly divided in to the sub regions to generate the locally enhanced Local Binary Histogram, which provide the features information on pixel level by creating LBP labels for histogram. Global Local Binary Histogram for the entire face image is obtained by concatenating all the individual local histograms. As a pre-processing technique the differential excitation of pixel is used to make the algorithm invariant to the illumination changes. The performance of the algorithm is verified under constrains like pose, illumination and expression variation.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127029533","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449605
D. Mehta, P. Kundu, A. Chowdhury
Transformer mineral oil has proved its suitability with transformer as an insulating medium, a coolant and a diagnostic tool over the past 100 years. Mineral oil is an environmental hazard which is not only toxic for human health, but also non-biodegradable and fast depleting (being a petroleum product). Also, this is not fire safe due to low flash & fire points. Transformer industry therefore, is seeing synthetic esters and natural esters liquids produced from various crop seeds (sunflower, soya bean etc.) as a substitute to mineral oil. The paper deals with challenges in designing, manufacturing, processing and operation of ester immersed transformers. It also discusses different tests carried out on natural ester liquid in factory received condition. The Paper also discusses the current status of Indian Transformer Industry in developing the ester immersed transformers for Indian utilities and development of Indian Standards on Green liquids.
{"title":"Indian transformer industry gearing up for next-gen green liquids","authors":"D. Mehta, P. Kundu, A. Chowdhury","doi":"10.1109/NUICONE.2015.7449605","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449605","url":null,"abstract":"Transformer mineral oil has proved its suitability with transformer as an insulating medium, a coolant and a diagnostic tool over the past 100 years. Mineral oil is an environmental hazard which is not only toxic for human health, but also non-biodegradable and fast depleting (being a petroleum product). Also, this is not fire safe due to low flash & fire points. Transformer industry therefore, is seeing synthetic esters and natural esters liquids produced from various crop seeds (sunflower, soya bean etc.) as a substitute to mineral oil. The paper deals with challenges in designing, manufacturing, processing and operation of ester immersed transformers. It also discusses different tests carried out on natural ester liquid in factory received condition. The Paper also discusses the current status of Indian Transformer Industry in developing the ester immersed transformers for Indian utilities and development of Indian Standards on Green liquids.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129138886","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449612
Hemang S. Pandya, Daivik M. Pandeji, Rohini K. Iyer, P. M. Purohit
Microgrid is a callow concept to utilize distributed generation optimally at load end of the conventional distribution networks. As most of the distributed energy resources are intermittent in nature the control and protection become very critical due to varying fault levels. Because of two way energy route in microgrid during Grid Connected mode the fault level drastically changes since grid generators also contribute to fault currents. The utmost importance has been given to protective relaying schemes for the microgrid in recent years. Digitization plays crucial role in the development of protection since the evolution of numerical relays. This paper presents the digital protection methodology for the microgrid using Particle Swarm Optimization (PSO) technique. The parallel feeder protection with the directional feature is introduced and Time Multiplier Setting (TMS) and Plug Setting Multiplier (PSM) for the same are optimized using PSO. A novel time grading scheme is introduced for the faster back up protection. MATLAB/SIMULINK environment is used to simulate the results.
{"title":"Digital protection strategy of microgrid with relay time grading using particle swarm optimization","authors":"Hemang S. Pandya, Daivik M. Pandeji, Rohini K. Iyer, P. M. Purohit","doi":"10.1109/NUICONE.2015.7449612","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449612","url":null,"abstract":"Microgrid is a callow concept to utilize distributed generation optimally at load end of the conventional distribution networks. As most of the distributed energy resources are intermittent in nature the control and protection become very critical due to varying fault levels. Because of two way energy route in microgrid during Grid Connected mode the fault level drastically changes since grid generators also contribute to fault currents. The utmost importance has been given to protective relaying schemes for the microgrid in recent years. Digitization plays crucial role in the development of protection since the evolution of numerical relays. This paper presents the digital protection methodology for the microgrid using Particle Swarm Optimization (PSO) technique. The parallel feeder protection with the directional feature is introduced and Time Multiplier Setting (TMS) and Plug Setting Multiplier (PSM) for the same are optimized using PSO. A novel time grading scheme is introduced for the faster back up protection. MATLAB/SIMULINK environment is used to simulate the results.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131966563","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449642
Ganrav Chanhan, Prasad Chandhari
Many people in this world are known to gestures, a powerful communication medium amongst humans. They say actions speak louder than words. Communicating with gestures is a powerful method. Industrial as well as robots used for home purpose are often controlled by remote controllers. The use of gestures as a way to control can help a lot providing ease and can be more useful for the handicapped. Gestures provide a separate complementary modality to speech for expressing ones ideas. Furthermore, Image processing is one of the most effective method used to process image signals. The main purpose of gesture recognition research is to identify a particular human gesture and convey information to the user pertaining to individual gesture. Sign language recognition from hand motions or postures is an active area in gesture recognition research for Human Computer Interaction (HCI). This paper aims to brief the practical approach of robotics through an effective method of image processing using gestures as a mode of control.
{"title":"Gestures based wireless robotic control using image processing","authors":"Ganrav Chanhan, Prasad Chandhari","doi":"10.1109/NUICONE.2015.7449642","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449642","url":null,"abstract":"Many people in this world are known to gestures, a powerful communication medium amongst humans. They say actions speak louder than words. Communicating with gestures is a powerful method. Industrial as well as robots used for home purpose are often controlled by remote controllers. The use of gestures as a way to control can help a lot providing ease and can be more useful for the handicapped. Gestures provide a separate complementary modality to speech for expressing ones ideas. Furthermore, Image processing is one of the most effective method used to process image signals. The main purpose of gesture recognition research is to identify a particular human gesture and convey information to the user pertaining to individual gesture. Sign language recognition from hand motions or postures is an active area in gesture recognition research for Human Computer Interaction (HCI). This paper aims to brief the practical approach of robotics through an effective method of image processing using gestures as a mode of control.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132067090","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449602
Akshay Mane, Mahesh Parihar, S. Jadhav, Bhavesh B. Digey
In this paper, Robotic application using a microcontroller ATmega2560 based kit mounted with low cost IR sensors for mapping and localization of unknown area is accurately carried out by using Kalman Filtering to determine or measure different parameters. This paper highlights the comparison between the accuracies of output data obtained from IR sensor using Average Technique as well as Kalman Filter. Various cases depending on robot movement in forward and backward direction and wheel rotation in clockwise and anticlockwise direction, are considered in this paper to calculate position encoder resolution. Also probabilistic estimation of actual position of robot is carried out using different techniques i.e Probability Density Function (P.D.F) for verifying the uncertainty in its position and found to be very close to actual position. Simultaneous Localization And Mapping (SLAM) is the only way a robot can navigate through an unknown environment with the use of minimum sensors and get reliable output of the same in identifying an unknown area. Using this method the robot not only create a map more accurate than GPS maps but also localize itself to determine its next position according to the map created more accurately at lower cost. Primarily used for creating a map of an unknown location, this concept can also be used to perform Qualitative Analysis of a given area by equipping the robot with appropriate sensors.
在本文中，机器人应用使用基于微控制器ATmega2560的套件，安装低成本的红外传感器，通过卡尔曼滤波来确定或测量不同的参数，精确地进行未知区域的测绘和定位。本文重点比较了用平均法和卡尔曼滤波对红外传感器输出数据的精度。在计算位置编码器分辨率时，本文考虑了机器人前后运动和车轮顺时针、逆时针旋转的各种情况。利用概率密度函数(Probability Density Function, P.D.F)等不同的技术对机器人的实际位置进行概率估计，以验证机器人位置的不确定性，并发现与实际位置非常接近。同时定位和绘图(SLAM)是机器人在未知环境中使用最少传感器并获得可靠输出以识别未知区域的唯一方法。利用这种方法，机器人不仅能绘制出比GPS地图更精确的地图，而且还能以更低的成本对自己进行定位，根据绘制的地图更精确地确定自己的下一个位置。这个概念主要用于创建未知位置的地图，也可以通过为机器人配备适当的传感器来对给定区域进行定性分析。
{"title":"Robotics based simultaneous localization and mapping of an unknown environment using Kalman Filtering","authors":"Akshay Mane, Mahesh Parihar, S. Jadhav, Bhavesh B. Digey","doi":"10.1109/NUICONE.2015.7449602","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449602","url":null,"abstract":"In this paper, Robotic application using a microcontroller ATmega2560 based kit mounted with low cost IR sensors for mapping and localization of unknown area is accurately carried out by using Kalman Filtering to determine or measure different parameters. This paper highlights the comparison between the accuracies of output data obtained from IR sensor using Average Technique as well as Kalman Filter. Various cases depending on robot movement in forward and backward direction and wheel rotation in clockwise and anticlockwise direction, are considered in this paper to calculate position encoder resolution. Also probabilistic estimation of actual position of robot is carried out using different techniques i.e Probability Density Function (P.D.F) for verifying the uncertainty in its position and found to be very close to actual position. Simultaneous Localization And Mapping (SLAM) is the only way a robot can navigate through an unknown environment with the use of minimum sensors and get reliable output of the same in identifying an unknown area. Using this method the robot not only create a map more accurate than GPS maps but also localize itself to determine its next position according to the map created more accurately at lower cost. Primarily used for creating a map of an unknown location, this concept can also be used to perform Qualitative Analysis of a given area by equipping the robot with appropriate sensors.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133369535","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 : 2015-11-01DOI: 10.1109/NUICONE.2015.7449634
Anand Sheth, M. Shah, V. Patel, Vijendra Kharbikar
With advancement in modern power electronics, low voltage, high current DC power supply is used extensively in industrial applications like arc furnace, fusion technology, arc welding etc. Conventional isolated full bridge DC-DC converter has many limitations like lower efficiency, higher weight and size. The main aim of this paper is to meet design requirements for many industrial applications like isolation between source and load, minimization of switching loss, high conversion efficiency, lower output voltage and current ripple and compactness. Phase shifted full bridge topology along with ZVS (Zero Voltage Switching) is selected to reduce switching losses and to improve the performance of the power supply. In low voltage applications, conduction loss of the diode bridge rectifier at secondary side contributes significant power losses. To improve the efficiency of converter synchronous rectifier technique is adopted. Simulation is done in PSIM software to validate the performance of power supply with isolated phase shifted full bridge topology along ZVS and center tap synchronous rectifier.
{"title":"Design and implementation of isolated 30 V, 30 A DC power supply using synchronous rectifier","authors":"Anand Sheth, M. Shah, V. Patel, Vijendra Kharbikar","doi":"10.1109/NUICONE.2015.7449634","DOIUrl":"https://doi.org/10.1109/NUICONE.2015.7449634","url":null,"abstract":"With advancement in modern power electronics, low voltage, high current DC power supply is used extensively in industrial applications like arc furnace, fusion technology, arc welding etc. Conventional isolated full bridge DC-DC converter has many limitations like lower efficiency, higher weight and size. The main aim of this paper is to meet design requirements for many industrial applications like isolation between source and load, minimization of switching loss, high conversion efficiency, lower output voltage and current ripple and compactness. Phase shifted full bridge topology along with ZVS (Zero Voltage Switching) is selected to reduce switching losses and to improve the performance of the power supply. In low voltage applications, conduction loss of the diode bridge rectifier at secondary side contributes significant power losses. To improve the efficiency of converter synchronous rectifier technique is adopted. Simulation is done in PSIM software to validate the performance of power supply with isolated phase shifted full bridge topology along ZVS and center tap synchronous rectifier.","PeriodicalId":131332,"journal":{"name":"2015 5th Nirma University International Conference on Engineering (NUiCONE)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134478914","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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