International Journal of Innovative Research in Electrical, Electronics, Instrumentation and Control EngineeringA monthly Peer-reviewed & Refereed journal
IJIREEICE meets the suggestive parameters outlined in the latest University Grants Commission (UGC) for peer-reviewed journals, ensuring high standards of research integrity, publication ethics, and academic excellence.
Abstract: A numerical study on MOSFET an important electronic device has been investigated in this paper. Aluminium is used as gate material and the substrate material is varied. Different characteristics such as output characteristics, transfer characteristics andon state resistance are obtained for each of these devices. The results are then compared and analyzed. The performance of the devices can be identified with these characteristics and the device which suits the required specifications can be identified based on these analysis.
Keyword: MOSFET, output characteristics, transfer characteristics and on state resistance.
Single Phase Module Integrated Converter Topology for Microgrid Network
M.PREMKUMAR, R.JEEVANANTHAM, S.MUTHUVIGNESHKUMAR
Abstract: The centralized approach of the traditional power grid would leads to national power blackout resulting in research for alternate solutions. This effort leads to the concept of smart grid. The single phase PV panel connected with micro inverter became efficient in now-a-days. The proposed topology deals with the analysis of single phase grid connected PV system with the help of microinverter topology. The work describes the representation of micro inverter for neglecting the domino effect. This paper, differentiate the microinverter from the string inverter in order to increase the efficiency of the micro grid. The main aim of the grid tied PV micro inverter is to convert the raw solar energy from the PV panels and feed it to the grid with high efficiency and high power quality. This topology consists of the buffer and cycloconverter to increase efficiency. The main advantages of the proposed topology are: 1) Eliminating the double frequency effect, 2) There is no requirement of additional circuitry and 3) Using long lifetime capacitors. The proposed approach is analyzed and experimentally verified.
Keywords: Microinverter, PV panel, Smart grid, Power quality
Abstract: Energy meter reading tedious process. Now a day energy meter reader goes to every premise and takes the reading manually then issues the bill. In manually reading human error possible and not provide reliable meter reading. To avoid this difficult task Automatic Energy Meter Reading (AMR) system is introduced. AMR is the technology that automatically collecting consumption and status of data from energy metering device and transferring the data to Electricity Board (EB) office by using Wireless Sensor Networks (WSN). After verifying customer‟s serial number bill will be issued then data has been stored into database. The proposed system automatically disconnect meter either load crosses concern limit or payment periods exists. It also does not provide electricity tampering and provide accurate meter reading.
Abstract: The objective of this paper is to investigate and find a solution by designing the PID and FUZZY Controllers for liquid level process. Measuring the level of liquids is a critical need in many industrial plants. Fuzzy control is based on fuzzy logic-a logical system that is much closer in spirit to human thinking and natural language than traitional logical systems. During the past several years, fuzzy control has emerged as one of the most active and fruitful areas for research in the applications of fuzzy set theory, especially in the realm of industrial processes, which do not lend themselves to control by conventional methods because of a lack of quantitative data regarding the input- output relations. The fuzzy logic controller (FLC) based on fuzzy logic provides a means of converting a linguistic control strategy based on expert knowledge into an automatic control strategy. Fuzzy Logic controller has better stability, small overshoot, and fast response. In this Paper, performance analysis of the PID controller and fuzzy logic controller has been done by the use of Matlab and Simulink and in the end comparison of various time domain parameters is done to prove that the fuzzy logic controller has small overshoot and fast response as compared to PID controller.
Abstract: Flow is the most significant parameter that is measured in process industry. In flow process set point tracing is the most important algorithm which is obtained using computing algorithm like PID, IMC, IMC-PID. IMC and IMC-PID controller characteristics is compared with conventional PID controller. To obtain the better performance to bring the process in desired set point. In process control application, spontaneous controllers are introduced. The different controllers are included in this paper (PID, IMC, IMC-PID). The most widely used trade controller is the PID (Proportional-Integral-Derivative) controller. Here the tuning of PID controller is done using Cohen coon method. The Internal Model Control (IMC)-based approach for controller design is one of them using IMC and its equivalent IMC based PID to be used in control applications in industries. IMC-PID is used for tracking set point for unsteady process.
Improving Dynamic Performance of Automatic Generation Control of Interconnected Power System by Combing Parallel EHV AC/ HV DC link
EMAD ALI DAOOD, SURYA PRAKASH, JYOTI SHRIVASTAVA
Abstract: This paper deals with load frequency control of 2 area interconnected Thermal power systems with EHVAC/HVDC links when subjected to small step load perturbations. For the present study, power system model consists of two areas thermal power plants having identical capacity. The system interconnection is considered namely (I) EHVAC transmission link only (II) EHVAC in parallel with HVDC transmission link. The HVDC link is considered to be operating in constant current control mode. To carry out the investigations, optimal AGC regulators are designed using proportional- plus-integral control strategy and implemented on the system under consideration in the wake of 1% step load perturbation in thermal area. The system responses will be simulated in Mat lab. Responses of deviation in frequencies, deviation in tie line power and integral of area control errors are plotted. By comparing the responses of the two model developed, one by using HVDC link and another without using HVDC link, the frequency deviation and settling time is lesser than without using HVDC link. Therefore by combining the transmission line by using HVDC link provides better dynamic performances in terms of overshoot and settling time. .
Keywords: Interconnected power systems; System dynamic performance; EHVAC//HVDC transmission link, MATLAB
Abstract: Location perception has become a quality in mobile systems, where a wide range of set of rulesand applications require dataof the placeof the contributingnodes. In lackof a priori trustworthy nodes the discovery and confirmationof fellow citizen positions becomes mainly challenging in the occurrenceof adversaries directing at injuring the system. In this paper, we reportthis exposedissue by suggestinga fully spreadsharedsolution that is strong against autonomous and colluding adversaries, and can be damaged only by avastbeing there of adversaries.
Keywords: Unstructured-Network, Position verification, Chinese remainder theorem, CRT-Algorithm, Back- tracking Algorithm.
Affect of Context on Think-aloud During Usability Evaluation
MOHAMMADI AKHEELA KHANUM, MUNESH C. TRIVEDI, SAJJAD ANEES NAGRAMI
Abstract: This paper investigates the effect of physical context on the outcomes of usability evaluation when think- aloud usability testing protocol is applied on children. Usability evaluation is performed with 18 children by assigning them randomly to two different physical settings: a lab and a field. Traditional think–aloud protocol is applied to elicit verbal comments from the children while solving tasks on the given system. The amount of verbalization, impact of test monitor on solving tasks, amount of prompting by the test monitor is quantitatively measured during the test sessions. The results indicates that context plays important role in influencing the results of usability evaluation and that think- aloud when applied in different physical contexts gives different results.
Study of Measurement and Control Aspects of Wind Tunnel
V.L. KAKATE, D S CHAVAN, P.B KARANDIKAR, NIRAJ MAHULKAR
Abstract: Wind energy is one of the cost effective renewable energy source. It is generated by horizontal axis and vertical axis wind turbines. Wind speed should be in the range of 5m/s to 15m/s for its effective generation. Low speed wind turbine development is in progress. Many leading research organizations, research labs in universities and wind energy industries around the globe are trying to develop micro or mini wind tunnel for feeding the electricity needs of urban houses. Energy generation from wind involves lot of electrical, mechanical and wind related parameters. Study of these parameters and their effect on electrical output is research topic for many decades. Testing of wind turbine with variation in wind parameters, electrical machines and tower type etc. are the major problems. Research centres of many establishments of leading companies such as suzlon has facilities to do such research work. Academic fraternity finds extremely difficult. One of the options is computer simulation. Wind tunnels of various sizes are available in leading educational organizations and companies. However most to them are of small and medium sizes and are suitable for performing specific tests pertaining to the particular product. This paper focuses on study of various wind tunnel parameters, types of tunnels, wind tunnel size and shape, air delivery, inlet-outlet dimensions and length of wind tunnel. Cooling of air, type of testing which can be performed etc are presented in this paper by keeping the major focus on electrical aspects in setting up wind tunnel.
Convergence Analysis Of RIP And OSPF In IPv6 Network
S. KAMALAKANNAN, S.VENKATESH, M.MOHAN
Abstract: Routing is the heartbeat of the Internet. Several routing protocols exist nowadays but the most common ones are Routing Information Protocol (RIP) and Open Shortest Path First (OSPF). The prime objectives of this project are to investigate the consequences of deploying RIP and OSPF simultaneously on a IPv6 network and to analyze Quality of Service (QoS).
Abstract: With the arrival of wireless technology the human efforts for accessing data at various locations has reduced by replacing wired infrastructure with wireless infrastructure and also providing access to devices having mobility. In the past, some believed wired networks were faster and more secure than wireless networks. But continual enhancements in wireless networking standards and technologies have eroded those speed and security differences. Since bandwidth has to be constrained, some of the key challenges in wireless networks are Signal fading, mobility, data rate enhancements, minimizing size and cost, user security and (Quality of service) QoS. This paper is intended to provide the reader with an overview of the Wireless networking and Challenges in wireless networks.
Keywords: Wireless Local Area Networks (WLANs), Wireless Personal Area Networks(WPANs), IEEE 802.11, Quality of Service (QoS), Wired Equivalent Privacy (WEP), Virtual Private Network (VPN)
Optimal Location and Sizing of Generator in Distributed Generation System
RASHMI PRIYA, SURYA PRAKASH, GEETA KUMARI, Z.R.KHAN AND KOMAL SINGH
Abstract: This paper presents a method for the optimal location and sizing of generator in Distributed generation in distribution systems. In this paper, our aim would be optimal distributed generation location and size for Power loss reduction in distribution network. In this paper, Genetic Algorithm (GA) is used for determine optimal location and size for placement distributed generators which referring two determined aim; the problem is defined and objective function is introduced. The proposed method is programmed and tested in a 16 bus distribution system using MATLAB software. The simulation results are given to verify the proposed analytical approaches.
Keywords: Distributed Generation (DG), Genetic algorithms (GA), Optimal location and sizing, Power loss.
Leakage Current Elimination in Single Phase Transformer less Grid Connected Power Systems
MS. JASMINE B, MRS. ANJUMOL C.S
Abstract: Eliminating the leakage current is one of most important issues for transformer less inverters in grid connected photovoltaic applications. The technical challenge is how to keep the common mode voltage constant to reduce the leakage current. For this purpose an improved single phase transformer less inverter is proposed. It has two additional switches connected in the dc side. The PWM pulses for those switches are given in such a way that the condition for making the common mode voltage constant is completely met. The common mode voltage can remain a constant during all the modes in the improved inverter. Both uni polar and double frequency control strategies are applied. By adopting uni polar PWM strategy, the leakage current reduced and a higher quality and lower THD of grid connected current are obtained using double frequency PWM.
Keywords: Common mode leakage current, improved transformer less inverter, Photovoltaic (PV) systems, Sinusoidal pulse width modulation (SPWM) strategy,
Low-Power Architectures and Self-Calibration Techniques of DAC for SAR-ADC implementation
ATUL THAKUR AND ALPANA AGARWAL
Abstract: SAR-ADC is best suited for low power applications where power has a trade-off with speed. Use of redundant circuitry reduces the on chip area making it cost effective. DAC is one of the components of SAR-ADC that introduces error voltage due to mismatch and consumes large power other than comparator. Low power DAC architectures have been studied and analysed. To account for capacitor mismatch issues self-calibration techniques have been discussed and analysed for 14-bit DAC implementation. All the architectures have been analysed for 100KS/s with 1.6MHz clock speed in 180nm technology with supply voltage of 1.8V. EDA tool used for design analysis is Cadence® Spectre®.
Keywords: Successive Approximation Register Analog-to-Digital Converter (SAR-ADC), Digital-to-Analog Converter (DAC), Electronic Design Automation (EDA), Least Significant Bit (LSB), Calibration.
A review of Defected Ground Structure (DGS) in Microwave Design
CHIRAG GARG, MAGANDEEP KAUR
Abstract: Electromagnetic bandgap (EBG) or alternatively called photonic band gap (PBG) structures have been attractive to obtain the function of unwanted frequency rejection and circuit size reduction. Researches on the PBG had been originally carried out in the optical frequency. Recently, there has been an increasing interest in microwave and millimeter wave applications of PBG circuits. This paper presents a tutorial overview of the new approach for designing compact filters like low pass, band stop and band pass having several advantages than Photonic Band Gap (PBG). This technique is termed as Defected Ground Structure (DGS). The basic conceptions and transmission characteristics with equivalent circuit models of varieties of DGS units are presented. Lastly, the main applications of DGS in microwave technology field have been described.
Abstract: Image fusion is defined as the process of combining two or more different images into a new single image retaining important features from each image with extended information content. The result of image fusion is a new image which is more suitable for human and machine perception or further image processing tasks such as segmentation, feature extraction and object recognition. This paper presents review on some of the image fusion techniques i.e. simple average, simple maximum, PCA, DCT, DWT. Comparative study of all these techniques concludes that DWT is better approach.
M SIVARAMAGANESH, M RAMYA, V GOWTHAM, T BHARATHI, G JEEVITHA
Abstract: The technology proliferation of Global Positioning System (GPS) is used to provide location based positioning, Navigation and time details in all climatic conditions and even anywhere any time. Though it comprises three units namely control unit, space and user unit and has become popularly used technology for time and location sensitive navigation, tracking and surveillance applications. The requirements of safety civilian in the sea as the maritime boundary (navigation) of a country cannot be achieved. The marine GPS navigation device and packages became a revolutionizing tool for fisherman boat’s maritime border crossing issues. The proposed system coins a low cost maritime border crossing alert system that amalgamating the potency of marine GPS device. It continuously monitoring, tracking, alerting and controlling the fisherman’s activity from the remote station located on the shore.
Keywords: Maritime border crossing; Low cost maritime border crossing alert system; Marine Global Positioning System
Abstract: This paper proposes new real time color recognition features, i.e., extracting primary colors for the purpose of vision-based human–computer interaction. Vision-based human–computer interaction could be achieved by analyzing segmented primary color regions. However, one of the challenges of color-based target tracking is that color distributions would change in different lighting conditions. This paper presents our investigation of color-based image segmentation, non-stationary color-based target tracking, color based mouse pointer, color based virtual music instruments, and color based virtual calculator. Our experiments show that Red, green and blue are the default color used for recognition process. Live video is captured from camera and the video is converted into number of frame images. This algorithm should monitor and process the every frame from the live video. Microphone and camera is used as an input devices. Here image processing is done through MATLAB for color recognition process.
Keywords: human computer interaction, color recognition, color segmentation, real time video.
BDD Ordering and Minimization Using Various Crossover Operators in Genetic Algorithm
RUPINDER KAUR, MANU BANSAL
Abstract: Binary Decision Diagram (BDD) is a data structure which is extensively used for compact representation of Boolean functions. On a more abstract level, BDDs can be considered as a compressed representation of sets or relations. BDDs are extensively used in CAD software to synthesize circuits (logic synthesis) and in formal verification. Ordering of BDDs play a major role in reduction of nodes and hence the area. In this paper, genetic algorithm with three crossover operators namely order, cycle and partially mapped has been proposed for minimization of shared ordered BDDs .The results have been compared using these three operators for Multi-input Adder Benchmark Circuits.
Intrusion Detection Using Random Naives Bayes Classifier In Smart Grids
PURNIMA.N, OMPRAKASH P
Abstract: Smart grids (SG) represent succeeding step in modernizing this electrical grid. The communications network is combined with the Smart grid so as to collect data that may be used to increase the potency of the grid, reduce power consumption, and improve the reliability of services, among different varied benefits. Smart Grid communication networks are distinctive in their giant scale. . The Wireless networks in communication setting are going to be exposed to several threats, in order that SGDIDS can realize attacks using Random Forest Naives Bayes Classifier. Random Forest Naives Bayes is trained using information that's relevant to their level and additionally improves detection. This paper proposes a FPGA primarily based network intrusion detection in communication network of smart Grid to detect and classify malicious data and possible cyber attacks.
Design of a Low Drop-Out Voltage Regulator using VLSI
NIDA AHMED, G.D.DALVI
Abstract: A Low-Voltage Low-Dropout(LDO) Voltage Regulator that can operate with a very small Input–Output Differential Voltage with nm CMOS technology in turn increasing the Packing Density, provides for the new approaches towards power management is proposed. A Simple Symmetric Operational Trans-Conductance Amplifier is used as the Error Amplifier (EA), with a current splitting technique adopted to boost the gain. This also enhances the closed-loop bandwidth of the LDO Regulator. In the rail-to-rail output stage of the EA, a Power Noise Cancellation Mechanism is formed, minimizing the size of the Power MOS transistor. These advantages allow the proposed LDO Regulator to operate over a wide range of operating conditions while achieving maximum current efficiency, less output variation for a variable load transient, and effectively appreciable Power Supply Rejection Ratio. The compact area of the proposed LDO regulator leads to a chip area efficient low drop-out Voltage Regulator which finds its applications for portable electronics, i.e. cellular phones, pagers, laptops, etc.
Simulation and Analysis of Brushless DC Motor Based on Sinusoidal PWM Control
JAINESH M. PATEL, HITESH V. HIRVANIYA, MULAV RATHOD
Abstract: This Paper is Presented According to the Control Strategy of the Pulse Width Modulation Techniques. Sinusoidal Pulse Width Modulation (SPWM) is used for Simulation of Brushless DC Motor Drive. Also the Hall Sensors are used to Sense the Rotor Position. According to the Hall Signal of Sense from the Rotor we get Six Signals. By Comparing Reference Speed and Actual Speed we get Error signal, now this Error Signal is compared with the Triangle Wave Generator and finally we get Final Error Signal. By Adding Previous Six Signals with this Error Signal of output will get Six Pulse, the Generated Six Gate Pulse given into the Inverter Circuit. The Simulation software used for the same is MATLAB/SIMULINK.
Keywords: Brushless DC Motor, Sinusoidal Pulse Width Modulation (SPWM), Simulation using MATLAB Simulink
Abstract: Due to propagation delay differences from source to destination in various multipath traced by the signal, the pulse width of the received signal may increase from that of the transmitted signal. Propagation delay differences constitute dispersion which introduces Inter Symbol Interference (ISI).The errors induced by ISI results in reduced bit rate of the communication system. In order to enhance the overall system’s performance, equalizers are introduced which aim for minimizing the ISI to allow recovery of transmit symbols. This paper deals with Constant Modulus Algorithm (CMA) Equalizer, the blind adaptive equalizer, to decrease the Bit Error Rate (BER) of the Wide Band Code Division Multiple Access (WCDMA) downlink system thereby improving the system’s performance. Reduction in BER lessens the radiation effects that lead to several health hazards.
Effect of various Crossover operators in Memetic algorithm on Multi-input adders
ANAMIKA, MRS. MANU BANSAL
Abstract: Binary Decision Diagram (BDD) is an important data structure play a major role in reduction of nodes and computation time. In this paper, Memetic algorithm with various crossover operators has been proposed for reduction of BDD node count and the execution time. The results have been compared using various Crossover operators (namely ordered, partially mapped and cyclic) for multi-input Adder Benchmark Circuits.
Different Control Strategies for Unified Power Quality Conditioner – A Review
AAKASH S. SHAH, PROFESSOR VISHNU PATEL, PROFESSOR MANISH PATEL
Abstract: Power quality has become an important factor in power systems. The main causes of a poor power quality are harmonic currents, poor power factor, supply-voltage variations, etc. To mitigate power quality problems, we have various equipments like active filter, passive filter, unified power flow controller and unified power quality conditioner etc. Among from them unified power quality conditioner was widely studied by many researchers as an eventual method to Improve power quality of electrical distribution System. To obtain the proper operation from UPQC, we need to control power filters of UPQC. To control them, there are different topology has been introduce. In this paper; several techniques a r e discussed and compared in terms of performance a n d implementation.
Keywords: Power quality, series and shunt active filter, unified power quality conditioner, control strategies, voltage control and current control.
Abstract: Recently Voltage stability issues have gained significant attention, due to voltage instability incidents. Voltage instability is the progressive and uncontrollable fall or rise of the voltage at some buses of the system which affects mainly reactive power increment. Voltage stability issues include the reactive power loss compensation techniques. In this paper a hybrid model of decision making based on two algorithms namely Swarm Optimization and Genetic Algorithm based implementation is proposed. The optimization problem is defined by obtaining the optimal locations of the Var compensators and to minimize the total reactive power loss in a power system network. The simulation observation illustrates an improvement in relative loss compensation in comparison to existing models.
Keywords: Power flow controller, swarm optimization, genetic algorithm, adaptive learning.
High Fault Coverage ATPG for Industrial Application using DYNAMIC SAT Technique
V.M.THOULATH BEGAM, DR. S.BAUL KANI
Abstract: It is a novel technique for automatic test pattern generation which well detects both easy to detect faults and hard to detect faults. ATPG based on this SAT technique dynamic clause activation (DCA) generates a limited number of test patterns which can cover more faults. ATPG based on implication graph have problems to cope with hard-to- detect faults. ATPG based on Boolean satisfiability does not work on a structural form. In SAT solver method the problem is transferred in to a Boolean formula and a SAT solver is used to solve this problem. It has disadvantages such as overhead for CNF transformation and over specified solutions. In the proposed method, the solving problem is directed by structural information which is provided dedicated data structures. The technique is designed such that the efficient solving techniques and data structures of SAT solver do not have to be modified. This is a crucial to retain the high efficiency of a SAT based algorithm. The proposed method is fast and provides a very high fault efficiency and useful in large industrial circuit.
Keywords: ATPG, Boolean Satisfiability, Dynamic SAT, Fault Coverage, SA technique.
Abstract: It is vital to image any given target with highest resolution so as to visualize the hotspots onboard and subsequently minimize the same to avoid any threat from the enemy, to visualize the given target better for suitable actions be it for agriculture, navigation, detection of different materials under the soil, etc. Imaging radar, like High Resolution Radar (HRR), offers a combatant the capability to perform long range surveillance with high quality imagery for positive target identification. To improve the time resolution, Time-Frequency Transform (TFT) methods of High Resolution Radar (HRR) imaging have been studied. Unlike traditional Fourier based processing time- frequency transform (TFT) allows variable time resolution of the entire event that falls within the HRR coherent integration period to be extracted as part of the imaging process. In this present work HRR imaging using time frequency transform to produce scattering or reflectivity centre’s of maneuvering targets for different values of angular velocity and observation time, and it is observed that the cross range resolution has been improved.
Keywords: High Resolution Radar, Cross Range Resolution, Translational Motion, Rotational Motion.
Distortion Power Analysis of Energy Efficient Lamps and Proposed Filtering Solution
GEENA SHARMA
Abstract: The aim of this paper is to analyze various power quality indices and luminous efficacy of different types of luminaries (Incandescent Lamp, Fluorescent Lamp, Compact Fluorescent Lamp and Light Emitting Diode). CFLs and LEDs are considered as highly energy efficient luminaries as compared to widely prevalent, low cost incandescent lamps. The replacement of Incandescent Lamps by CFLs and LEDs have resulted in reduction in active power consumption, a reduction in peak current and reduction in distribution system losses. All these aspects have positive impact on energy consumption. However, the other aspect – viz. harmonic distortions in CFLs and LEDs is not being appropriately addressed, which might cause unforeseen problems in the power supply grids, particularly in rural feeders in India. The paper represents comparative analysis of luminous efficacy, distortion power and power factor occurring in different types of luminaries (as defined in IEEE – 1459:2000 Standard).
Comprehensive Study of Speed Control And Power Loss Analysis Using Rotor Resistance And Slip Power Recovery Method
DHAVAL D. MER, RAKESHKUMAR A. PATEL, MANISH G. PRAJAPATI
Abstract: Wound rotor induction motors have been popular for decades in the cement and mining industry for starting and driving large grinding mill. A wound rotor induction motor is large ac motor that controlled starting characteristics and adjustable speed capability. Slip power recovery wound rotor induction motor drives are used in high power, limited speed range applications where control of slip power provides the variable speed drive system. Traditional method of speed control of slip ring induction motor is variable resistance method but losses occurs are more. So, in this paper rotor resistance method and slip power recovery system is used for the speed control of slip-ring induction motor and analysis of speed and power loss is carried out. MATLAB/Simulink is used to simulate this both method for slip-ring induction motor and prove that in rotor resistance method speed control is possible but the system loss is increase whereas in slip power recovery system by change in firing angle of inverter we can change speed of motor and save power which is loss in resistance.
Keywords: Slip power; MATLAB/Simulink; Firing angle; Slip Power Recovery System
Design & Development of an efficient inverter System for Single-Phase Non-Conventional Energy System
BINDU B
Abstract: This paper proposed a transformer less inverter for use in residential solar energy systems. There is a strong trend in the photovoltaic (PV) inverter technology to use transformerless topologies in order to acquire higher efficiencies combining with very low ground leakage current. The operation principle, control strategy and characteristics of the system are described. The new and traditional system configuration has compared in this paper. Analysis and simulation results will be presented to demonstrate the new features. An improvement in inverter efficiency and a reduction in cost have been achieved by omitting the 50 Hz power transformer (transformerless). The design and control issues associated with the development of a 40 W prototype single-phase stand alone photovoltaic system is discussed in this paper. Voltage level controller and PWM inverter systems have been realized by usingPIC16F877A microcontrollers. An experimental system was implemented to demonstrate the effectiveness of the proposed system. Simulation and experimental results are given to verify the system’s efficiency. Simulated model for system is designed using MATLAB Simulink. The paper focuses on some known problems and challenges for transformerless inverters. Topologies without transformers have big advantages like low weight, volume and cost. In addition they often reach higher efficiencies than topologies with transformers. Therefore they are important for future developments.
Keywords: DC–AC power conversion, photovoltaic (PV) systems, transformerless inverter, PIC microcontroller, DC- DC Converter, Solar energy.
Design and Modeling of a Miniature DC–DC Converter
SANJNA SALIM, RENU JOSE
Abstract: The power module for min iature Inertial Nav igation System demanded reduction in volume and footprint and it had to be housed inside the min iature INS package. Three such power modules are required for powering the three electrical chains of miniature INS. Also as demanded by the improved sensor electronics, the peak output power was increased from 57 W to 65 W. The reduction in volume and increase in power demanded power density enhancement of around three times fro m the existing system. The objective of t he paper is to design a dc - dc converter satisfying the required specifications for an input voltage range of 22-36 V and providing mu ltiple outputs +5V, +/-15 V, +/-30V and + 28Vwith a targeted efficiency of >80%. Also grouping the outputs to sets into HMCs was also attempted. The paper discusses various steps right from the topology selection to the design of the components. Design validation using SABER software is also done.
Keywords: Min iaturization, power density improvement, magnetic, Hybrid M icro Circuit (HM C), Lo w Drop out Regulator (LDO)
Three level buck converter with improved dynamic performance using linear-non linear control
RESHMA.P.S, RENU JOSE
Abstract: Dynamic response of a converter plays an important role in many applications which change load in a rapid manner, especially in Po L(Po int of load)applicat ions. Here a new method for imp roving the dynamic response of a converter is presented. Here separate control schemes are imp lemented during steady state as well as transient load conditions. A three level buck converter topology with fast transient response is discussed here. This topology does not require a soft start up circuitry for three level buck converter. Simu lation model is done in Matlab/Simu lin k and the result shows a great improvement in dynamic response of the system.
Abstract: The art icle proposes an approach to tune the various controllers employed in flo w process. The objective is to maintain the desired flow by means of a float in the rotameter. The process model is identified by step test. Various controller tuning methods like Z-N and IMC are applied to the obtained process model. The results are compared and the best among the two is validated and highlighted through time do main specificat ion. Experimental results confir m that Internal Model Control (IM C) has better performance when co mpared to Ziegler Nichols method (z-n).
Keywords: PID controller, Ziegler-Nichols (Z-N), Internal Model Control (IM C), Flo w Process.
Abstract: This Paper deals with the tuning of PID controller using conventional methods and computational technique like Part icle Swarm Optimizat ion. The main objective is to prove that the response obtained is more stable, robust and efficient when PID is tuned using PSO. The obtained value is compared with conventional methods like Ziegler Nicholas, Cohen-coon and Internal Model Control. The cr iteria used for comparison include time domain specifications, Performance index, robustness of the system, servo and regulatory responses.
Abstract: Temperature Measurement is one of the major controlling parameter in Industries like Level, Flow, Pressure etc. One of such Temperature process es is taken in this paper and Modelling of the Process has been carried out and Transfer function of the Single Input Single Output (SISO) system. For the particular temperature process controller transfer function has been determined and control parameters such as Proportional Gain, Integral Time and Derivative time are identified. They are numerous methods of developing a Proportional Integral and Derivative (PID) Controller, amongst them some methods are adopted in this paper and Comparisons of Time Do main specifications of those controllers has been carried out and Performance Index metrics such as Integral Absolute Error (IA E), Integral Square Error (ISE), Integral Time Absolute Error (ITA E), Mean Square Error (M SE) of those controllers are also compared. The Results are obtained fro m above comparisons and the optimu m controller has been identified.
Keywords: PID controller, FOPTD, IA E, ITA E, ISE, M SE.
Abstract: Most biometric systems that are presently used in real time applications typically use a single biometric characteristic to authenticate the user. A biometric system which is based only on a single biometric identifier in making a personal identification is often not able to meet the desired performance requirements. Multimodal b io metrics is an emerging field of bio metric technology, where more than one biometric trait to improve the combined performance. We design a bimodal bio met ric system wh ich integrates FKP and Face. Hence this paper has focused on the extraction o f featu res fro m FKP and Face using Scale Invariant Feature Transform ( SIFT), and the key po ints are derived fro m FKP and Face and then they are clustered using K-Means Algorithm. The centroid, mean and variance of key extracted image of K-Means are stored in the database which is compared with the query FKP and Face features to prove the recognition and authentication . The co mparison is based on the XOR operat ion . Results are performed on the Poly-U FKP and Face database to check the proposed FKP and Face recognition method. It can be used to overcome some of the limitations of a single b io metrics, increases the performance.
Keywords: Bio metric, SIFT A lgorith m, Feature Extract ion, K-Means Algorith m
Design and Implementation of Area Optimized ALU using GDI Technique
AKSHAY DHENGE, ABHILASH KAPSE, SANDEEP KAKDE
Abstract: Area and power are the two vital issues in analog circuit design and synthesis of ULSI and VLSI circu its which depends on various critical design parameters. The purpose of this paper is the design and implementation of an Arith metic Logic Unit (A LU) using area optimizing techniques such as complementary & Gate-Diffusion-input (GDI). The main sub-blocks of ALU are Adder, Subtractor, shifter and Logical Block. Th is work evaluates and compares the performance and optimized area of ALU with Static CMOS techniq ue and GDI technique in 250n m CM OS (1P5M-1 Poly 5 Metal) process technology. Simulat ions are performed by using Tanner EDA 13.2 tools using model file 250n m CMOS technology. At first, using Tanner 13.2 EDA S-Ed it Tool, the circuits are implemented with Static CMOS technology and then with GDI techniques. Simu lations results validate the proposed concept and verify that GDI technique decreases the area used by ALU and increase the speed of ALU.
Keywords: A LU, VLSI, GDI, CMOS, Lo w Po wer, Power Dissipation, Optimized A LU.
Abstract: The analysis study has been done for a First Order Plus Delay Time (FOPDT) model controlled by Proportional Integral Derivative (PID), proportional integral(PI),Internal Model Controller(IM C) and Model Predictive Control (MPC) using MATLAB software. The study has been done for both MPC and conventional control methods to design the controller for the level tank system and the results has been compared in terms of rise time, settling time and maximu m overshoot. The conventional PID controller gives corrective action only after error has developed but not in advance but MPC provides corrective action in advance. The objective of this study is to investigate the Model predictive control (MPC) strategy, analyze and co mpare the contro l effects with conventional control strategy in maintaining a water level system. A Co mparison between the performance of Conventional controller and MPC Controller has been performed in which MPC Controller g ives better system parameter in terms of Riseti me(tr), Settling time(ts) and maximu m overshoot(Mp).
Implementation of Adaptive Filtering Algorithm for Speech Signal on FPGA
RUPALI V. MANE, DR. M.T.KOLTE
Abstract: Th is project gives the study of the principles of Adaptive Noise Cancellation (ANC) and its Applications. Adaptive noise Cancellat ion is an alternative technique of estimat ing signals corrupted by additive noise or interference. In signal processing methods of removing noise, levels of noise rejection are not attainable without prior knowledge about speech signal and noise. But in this method of noise cancellation with no a priori knowledge of signal or noise, noise rejection can be achieved satisfactorily. FPGA implementation of adaptive filtering algorith m is studied in this project wo rk. Two adaptive Filtering Algorithms are imp lemented LMS and wiener. LMS filter is designed in VHDL. Here wiener filter is implemented in adaptive manner to accommodate the varying nature of speech signal. The adaptive wiener filter is implemented in time domain rather than in frequency domain. This adaptive wiener filer is uses two method for speech enhancement TSNR and HRNR. The basic principle of wiener filter is to obtain the estimate of speech signal corrupted by noise. The noise reduction process applies spectral gain to short time spectrum value of noisy speech signal. This gain is expressed as function of priori SNR which is estimated using decision - directed approach. TSNR is used to eliminate the drawback of decision directed approach and retains its advantage. But in noise reduction process some harmonics which a part of o rig inal speech signals are suppressed. For that HRNR method is used to recover these harmonics. The resulting artificial signal is produced in order to refine the a priori SNR used to compute a spectral gain able to preserve the speech harmonics.