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VOLUME 2, ISSUE 7, JULY 2014
Design and Implementation of controller for Wind driven PMSG based Standalone System
G.VIJAYALAKSHMI, M.ARUTCHELVI, S.LENIN PRAKASH
An optimized algorithm in visual cryptography for the concealment of JPEG colour images
AMIR HOSEIN JAFARI, HADI SHAHRIAR SHAHHOSEINI
Small-Signal Transfer-Function Extraction of a Lossy Buck Converter Using ASM Technique
A.SKANDARNEZHAD, A.RAHMATI, A.ABRISHAMIFAR, A.KALTEH
An Analysis and Performance Evaluation of KMPR selection in OLSR and AODV Protocols in a VANET network using NS-2
MS. SHRADDHA V.YENGADE, PROF. MS. JAYSHRI. D.DHANDE, DR. MAHENDRA. A.GAIKWAD
Design and Simulation of Cascaded H- Bridge Quasi Z-source Multilevel Inverter for Photovoltaic Applications
D.UMARANI, DR.R.SEYEZHAI
Performance Evaluation & Simulation of Solar Power System
SUPREETH K, K SHANMUKHA SUNDAR, D.BALAMURUGAN
Anti-Windup PID Based Wind Generation with Power Smoothing Elements
B.PRATHIBA, CH.SAMPATH KUMAR, SHAIK KHAMURUDDIN
Multi Scale Decomposition and Edge Preserving Filter Based Satellite Image Resolution Enhancement – A Review
Manjoor.Syed, S.Naga Kishore Bhavanam
Copy Move Image Forgery Detection using Block and Feature Based Method
TUSHANT A. KOHALE, DR. S.D. CHEDE, PROF. P.R.LAKHE
Design and analysis of Intelligent Transport Systems in VANETs using AODV Routing Protocol in NS2
VALSANGKARFARID, PROF SHIRGAN S.S, KADGANCHI HARSHAD
Comparative Analysis Between BPSK and QPSK Modulation Technique Based on BER Analysis using V-BLAST Based MMSE Technique
MR. PRASHANT BHATI, MR. KISHOR P JADHAV
Hardware efficient watermarking technique for finite state sequential circuit using STG
JEEBANANDA PANDA, ANKUR BHARADWAJ, NEETA PANDEY, ASOK BHATTACHARYYA
Design and Analysis of Balanced Doubled Feed Square Patch Antenna using Finite Element Method
PRIYANKA BANSAL, DR. DARSHAN SINGH SIDHU
Improvement of Voltage Profile using D-STATCOM – Simulation under sag and swell condition
BRIJESH PARMAR, PROF. SHIVANI JOHRI, CHETAN CHODAVADIYA
Abstract
Design and Implementation of controller for Wind driven PMSG based Standalone System
G.VIJAYALAKSHMI, M.ARUTCHELVI, S.LENIN PRAKASH
Abstract: The main aim of the project is to use an ac/dc/ac power converter to extract power from variable speed Permanent Magnet Synchronous generator (PMSG) and feed it to supply a standalone load. The output voltage and frequency of the PMSG is variable in nature due to non uniform wind velocities . In order to condition and feed it to a load we need power electronic interface. The variable three phase ac output at the PMSG is rectified by a diode rectifier and the dc link is maintained constant by a boost converter. The boost converter is provided with a closed loop feedback control, which is designed using PI controller. In this controller the output voltage is continuously sensed and duty ratio of the switch is varied to maintain the DC output voltage. The converter output is fed to 3 phase inverter which employs a sine PWM technique, the output of which can be fed to a load or grid. The inverter is incorporated with both real and reactive power control to match the grid or load specifications. The power converters and together with independent control systems can effectively improve the output voltage and frequency of the wind PMSG feeding an isolated load. The whole system is simulated using MATLAB/ Simulink and the results are shown. Hardware implementation of the system in open loop is done in the laboratory with a Wind turbine Emulator and inverter setup. The inverter pulses are generated in 120 deg and 180 deg mode with variable frequency using C2000 Piccolo launchpad evaluation kit.
Keywords: Permanent Magnet synchronous Generator(PMSG), PI controller, Closed loop boost converter, Closed loop inverter , Standalone load, C2000 launch pad evaluation kit.
Keywords: Permanent Magnet synchronous Generator(PMSG), PI controller, Closed loop boost converter, Closed loop inverter , Standalone load, C2000 launch pad evaluation kit.
Abstract
An optimized algorithm in visual cryptography for the concealment of JPEG colour images
AMIR HOSEIN JAFARI, HADI SHAHRIAR SHAHHOSEINI
Abstract: In this article, a visual cryptography method has been presented which exhibits significant improvement over previous approaches in terms of computation cost, volume of information and the quality of the recovered images. By means of this algorithm, JPEG images, without having to be decompressed and then encrypted, are directly converted to distinct shares and placed within other images as covered images. In this way, it is no longer necessary to decompress the JPEG image and to encrypt each share separately and this cuts down on computation overhead. Another advantage of our work is that, contrary to previous methods which were used to conceal two pieces of share images in other images with 9 times the size, here we were able to conceal them in images with a smaller size (i.e. 4 times the size). Also in contrast to lower quality of covered images in previous methods, in this approach, no tangible change of quality is noticed in covered images and thus, they don’t raise the curiosity of the invader.
Keywords: Visual cryptography; Secret image; Pixel; DCT coefficients.
Keywords: Visual cryptography; Secret image; Pixel; DCT coefficients.
Abstract
Small-Signal Transfer-Function Extraction of a Lossy Buck Converter Using ASM Technique
A.SKANDARNEZHAD, A.RAHMATI, A.ABRISHAMIFAR, A.KALTEH
Abstract: Nowadays, step-down power converters such as buck scheme are widely employed in a variety of applications such as power supplies, spacecraft power systems, hybrid vehicles and DC motor drives. This paper determines the small signal averaged switch model (ASM) of the buck converter with parasitic elements consideration. Lossy analysis helps one to better understanding of the time-frequency domain behaviour and accurate designing the feedback control circuitry. After determining the control-to-output and audio-successability transfer functions, finally the proposed model results are validated by simulations in PSpice and Matlab software.
Keywords: Buck Converter, Parasitic Elements, Small-Signal Transfer-Function, Averaged Switch Model.
Keywords: Buck Converter, Parasitic Elements, Small-Signal Transfer-Function, Averaged Switch Model.
Abstract
An Analysis and Performance Evaluation of KMPR selection in OLSR and AODV Protocols in a VANET network using NS-2
MS. SHRADDHA V.YENGADE, PROF. MS. JAYSHRI. D.DHANDE, DR. MAHENDRA. A.GAIKWAD
Abstract: Recent advances in wireless technologies have given rise to the emergence of vehicular ad hoc networks (VANETs). In such networks, the limited coverage of Wi-Fi and the high mobility of the nodes generate frequent topology changes and network fragmentations. Vehicular Ad-hoc Networks (VANETs) are a special type of Ad-hoc networks. They can be utilized to guarantee road safety, to avoid potential accidents and make new forms of inter-vehicle communications so they will be an important part of the future Intelligent Transportation Systems (ITS).To enhance the safety of drivers and to provide the comfortable driving environment, messages decoding for KMPR (Kinetic Multipoint Relay) selection in OLSR (optimized link state routing) and AODV (ad-hoc on demand distance vector) Protocols in a VANET network using NS-2. As MPR (Multipoint Relay) selection in OLSR and AODV protocol in VANET suffer from message decoding issues that purpose to resolve message decoding issues and improve delivery time. We have proposed KMPR selection in OLSR and AODV protocol in VANET .The Performance of KMPR selection in OLSR and AODV protocol in VANET will be evaluated in terms of Packet Loss, Network Load, throughput, cost and delay using simulation platform NS-2 .In this paper we have proposed selection of KMPR for an analysis and performance evolution of all parameters and packet loss have shown to minimize that approximately 50% of the KMPR chosen the first step of the protocol.
Keywords: VANETs, Routing Protocols, OLSR, AODV, KMPR.
Keywords: VANETs, Routing Protocols, OLSR, AODV, KMPR.
Abstract
2D Modelling single sheet tester
DAHMANE HACHI, BACHIR NAAS, BADREDDINE NAAS, MOUSSAOUI.D
Abstract: In this study a Single Sheet tester is simulated using a 2D Finite elements methods by Matlab. Its main goal is to find the best geometrical structure. The simulations have been performed using the magnetic vector potential A formulation and have been limited to a magnetostatic case. The influence of the geometrical parameters and there magnetic properties are taken account in order to optimise the conception of the device.
Keywords: Single Sheet tester SST, finite elements, H coils methods, Power loss.
Keywords: Single Sheet tester SST, finite elements, H coils methods, Power loss.
Abstract
Design and Simulation of Cascaded H- Bridge Quasi Z-source Multilevel Inverter for Photovoltaic Applications
D.UMARANI, DR.R.SEYEZHAI
Abstract: In this paper, a cascaded five level Quasi Z-Source inverter is proposed for photovoltaic applications. The proposed topology employs an LC network between the DC source and inverter circuitry to achieve boost as well as inversion operation. The output voltage of the proposed inverter is controlled by using modulation index and shoot through state. Various modulation strategies have been reported in the literature for the proposed topology. But this paper focuses on the implementation of simple boost, maximum boost and constant boost control strategies with third harmonic injected phase shift PWM. The performance parameters of the proposed topology are computed and comparison is provided for all the three control strategies. Simulations of the circuit configuration for the above mentioned control methods have been performed in MATLAB/Simulink and the results are verified.
Keywords: Quasi Z-Source inverter, Simple Boost, Maximum Boost, Constant Boost control, Pulse Width Modulation (PWM), Phase shifted pulse width modulation (PSPWM)
Keywords: Quasi Z-Source inverter, Simple Boost, Maximum Boost, Constant Boost control, Pulse Width Modulation (PWM), Phase shifted pulse width modulation (PSPWM)
Abstract
Implementation of Intrusion Detection System using GA
MS.LATA JADHAV, PROF.C.M.GAIKWAD
Abstract: In recent years, computer systems are facing increased number of security threats because of rapid expansion of computer networks. Different soft computing techniques have been proposed in recent years to develop the Intrusion Detection System. This paper presents an effective genetic algorithm (GA) approach for intrusion detection and the software implementation. The Genetic algorithm is used to derive the set of classification rules from audit data and support confidence framework is utilizes as fitness function to judge the quality of each rule. Then the generated rules are used to detect or classify network intrusions. The proposed method is easy to implement while providing the flexibility to either generally detect network intrusions. Experimental results show the more effective detection rates based on benchmark DARPA data sets on intrusions.
Keywords: Genetic algorithm, Intrusion Detection, support confidence framework.
Keywords: Genetic algorithm, Intrusion Detection, support confidence framework.
Abstract
Identical Frames Based Video Steganography
SUKHJINDER SINGH, NEERAJ GILL, GAGANDEEP KAUR
Abstract: Steganography is a technique employed for hiding the secret data under cover object. It resolves the problem of network security and provides secure communication through public and private channels. The cover can be text, image, audio or video. In this technique, the secret information is concealed in a video cover. Video file contains some identical frames, which are selected to hide the data. When steganography by this process is used, the probability to uncover the secret information by an attacker is very less as compared to the other methods to hide data frame-by-frame in a sequential manner. It also increases the robustness of data in case of frame dropping and frame adding attacks. In this proposed work a modified technique has been used to embed the data. This technique involves the application of wavelet transform on cover file followed by the application of LSB technique in sub bands. Lower frequency sub-band is selected to hide the encrypted data in cover file. The performance metrics such as Peak Signal to Noise Ratio (PSNR), Mean Square Error (MSE) and Mean Absolute Error (MAE), have been considered for experiment verification.
Keywords: Wavelet transform, Identical frames, Encrypted data, LSB
Keywords: Wavelet transform, Identical frames, Encrypted data, LSB
Abstract
Search-Based Simulink Model Testing
VIDEET M VISAVADIYA, BHAVNA K PANCHOLI
Abstract: Search-based test-data generation techniques have been widely used in code level testing. Testing of various functional and non-functional properties has been targeted, as has fulfilling certain structural coverage criteria. This work takes a step further to attempt test-data generation at the higher levels of abstraction offered by Simulink models. Code testing has been proven successfully at industrial level and industries are working on it since many years. Hence, a flexible tool for testing of models can be a great boon to the industry. Presently, less number of tools is available for this purpose and that was the motivation for me to make this framework. In my work I have investigated such models and have made a wide-ranging, adaptable, automatable framework for testing these models. This flexible testing framework allows analysis of even smallest unit of blocks as well as high level design blocks.
Keywords: Model Testing, Search-based Testing Techniques, Testing Framework, High level model testing techniques.
Keywords: Model Testing, Search-based Testing Techniques, Testing Framework, High level model testing techniques.
Abstract
DSP-Based Control of Autonomous Vehicle Driven PMDC Motor
SELCUK GUVEN, HALIL IBRAHIM OKUMUS
Abstract: In this paper a direct current (DC) motor drive system for a vehicle tracking a given route is developed. The control of the system is performed using TMS320F2808 digital signal processor (DSP). The algorithm, which is used for DC motor control, is designed using Matlab/Simulink simulation software. The generated codes are built into the TMS320F2808 directly via CCS (Code Composer Studio) by favour of this software.
A permanent magnet DC (PMDC) motor is used in the vehicle. Motor control is performed based on digital signal controller. The H-bridge dc-dc converter which is driven by the pulse-width modulation (PWM) signals generated by micro controller changes the average value of the voltage applied to the motor and as a result the speed of the motor is controlled
Keywords: Autonomous vehicle, Permanent magnet DC machine, TMS320F2808 DSP, eZdsp F2808, Microcontroller
A permanent magnet DC (PMDC) motor is used in the vehicle. Motor control is performed based on digital signal controller. The H-bridge dc-dc converter which is driven by the pulse-width modulation (PWM) signals generated by micro controller changes the average value of the voltage applied to the motor and as a result the speed of the motor is controlled
Keywords: Autonomous vehicle, Permanent magnet DC machine, TMS320F2808 DSP, eZdsp F2808, Microcontroller
Abstract
Performance Evaluation & Simulation of Solar Power System
SUPREETH K, K SHANMUKHA SUNDAR, D.BALAMURUGAN
Abstract: Major challenges faced in implementing solar photovoltaic electric power generation are high initial cost, low conversion efficiency of solar modules & unpredictability of solar insolation fluctuations. Before erecting a PV plant of any capacity in any location, it is best to evaluate the performance of the plant for over a period of time well before the plant is actually installed. This can be accomplished with help of computer simulation. In this work, the performance of a 1.155kW solar pv roof top plant has been evaluated by creating a simulation model using MATLAB- SIMULINK. Simulation model is evaluated for different days’ insolation values without MPPT & with buck-boost converter & cuk converter, with distributed MPPT. Shadow analysis has been performed on the same module & its performance for different shading conditions. Simulation outputs for different days’ data were compared with the practical outputs of the plant & were found to match accurately.
Keywords: Solar Photovoltaics, Photovoltaic (PV), Solar Insolation, Maximum Power Point Tracking (MPPT), Voltage Ripple
Keywords: Solar Photovoltaics, Photovoltaic (PV), Solar Insolation, Maximum Power Point Tracking (MPPT), Voltage Ripple
Abstract
Torque Control in Switched Reluctance Motor by BFO Optimization
SOMBIR KUNDU, DR. NARESH KUMAR
Abstract: These motor are extensively used in aerospace, automotive and other home appliances. These motors have winding in the stator which is excited from a separate source. The control of these motor drives is obtained using converter circuits that control the excitation of the phase by switching converter switches. The conventional converter circuit suffers from low power factor and high harmonic content which in turns affects the performance of the motor drive. The aim of the work is to develop a suitable converter circuit that would give and improved power factor and low torque ripples. Three phase asymmetrical power converter using IGBT is used in the feedback of motor to control the power factor of motor. Further for minimization of ripples in torque and optimization technique named bacterial foraging optimization is used. It takes torque in the objective function and calculate ripples; assign new values to turn on and off angle of motor. So that an optimum position to the stator and rotor of motor can be assigned. Where ripple are minimum.
Keywords: SR motor,Matlab/Simulink,3-phase power converter, IGBT,BFO optimization, torque ripple minimization.
Keywords: SR motor,Matlab/Simulink,3-phase power converter, IGBT,BFO optimization, torque ripple minimization.
Abstract
Anti-Windup PID Based Wind Generation with Power Smoothing Elements
B.PRATHIBA, CH.SAMPATH KUMAR, SHAIK KHAMURUDDIN
Abstract: This paper proposes a capacitor clamped multi level inverter anti wind up wind power generation system with power smoothing elements. This technology will place voltage of the capacitor in defined range by replacing with super capacitor. In this paper An Anti wind controller is inserted to overcome the physical limitations of wind turbines. This anti wind up controller uses mainly a pid controller to saturate the output of equipment. A space vector modulation method is proposed in this paper to reduce harmonic distortion caused by the super capacitor in capacitor clamped inverters. Implemented clearly shown in paper. Proposed circuit is analyzed by simulation MATLAB/SIMULINK.
Keywords: flying capacitor, grid, anti wind up, PID Controller
Keywords: flying capacitor, grid, anti wind up, PID Controller
Abstract
Multi Scale Decomposition and Edge Preserving Filter Based Satellite Image Resolution Enhancement – A Review
Manjoor.Syed, S.Naga Kishore Bhavanam
Abstract: Resolution enhancement (RE) schemes which are not based on wavelets has one of the major drawbacks of losing high frequency contents which results in blurring. The discrete wavelet- transform-based (DWT) Resolution Enhancement scheme generates artifacts (due to a DWT shift-variant property). A wavelet-Domain approach based on dual-tree complex wavelet transform (DT-CWT) & nonlocal means (NLM) is proposed for RE of the satellite images. A satellite input image is decomposed by DT-CWT (which is nearly shift invariant) to obtain high-frequency sub bands. Here the Lanczos interpolator is used to interpolate the high-frequency sub bands & the low-resolution (LR) input image. The high frequency sub bands are passed through an NLM filter to cater for the artifacts generated by DT-CWT (despite of its nearly shift invariance). The filtered high-frequency sub bands and the LR input image are combined by using inverse DT- CWT to obtain a resolution-enhanced image. Objective and subjective analyses show superiority of the new proposed technique over the conventional and state-of-the-art RE techniques.
Keywords: Dual-Tree Complex Wavelet Transform (DT-CWT), Lanczos Interpolation, Resolution Enhancement (RE), shift variant.
Keywords: Dual-Tree Complex Wavelet Transform (DT-CWT), Lanczos Interpolation, Resolution Enhancement (RE), shift variant.
Abstract
Copy Move Image Forgery Detection using Block and Feature Based Method
TUSHANT A. KOHALE, DR. S.D. CHEDE, PROF. P.R.LAKHE
Abstract: Digital images are the most important source of information. The availability of powerful digital image processing software’s, makes it relatively easy to create as well as manipulate and make digital forgery from one or multiple images. In today’s world it is easy to developed the image forgery by adding or removing some elements from the image which result in a of image tampering. A copy-move forgery is created by copying and pasting content within the same image, and post-operating it. The detection of copy-move forgeries has become one of the most actively researched topics in image forensics department. The key objectives of the proposed method is to study the effect of different types of tampering on the digital image, detect image forgery by copy-move under many types of attacks by combining block-based and feature based method and accurately locating the duplicated region.
Keywords: image, image forgery, copy-move image forgery detection, block and feature based methods.
Keywords: image, image forgery, copy-move image forgery detection, block and feature based methods.
Abstract
ECG Denoising using Wavelet Transform
REEMA S. KALDA, PRAMOD J. DEORE
Abstract: ECG gets easily corrupted by noise and human artifacts. Denoising of ECG is very important issue in medical engineering. This paper presents the Wavelet based method that is Wavelet Transform Modulus Maxima(WTMM), for the removal of white Gaussian noise (AWGN) from ECG signal. Wavelet used here for decomposing the signal into various scales is Db6. This method basically deals with finding out the singularities and local maxima of wavelet transform is used to analyse these singularities. Hard and soft thresholding methods are used to obtain the coefficients of interest and to suppress the noise components. Inverse wavelet transform is used to reconstruct the signal.
Keywords: ECG, Lipschitz exponents, Singularities, Wavelet Transform.
Keywords: ECG, Lipschitz exponents, Singularities, Wavelet Transform.
Abstract
Design and analysis of Intelligent Transport Systems in VANETs using AODV Routing Protocol in NS2
VALSANGKARFARID, PROF SHIRGAN S.S, KADGANCHI HARSHAD
Abstract: The wireless medium plays a vital role in communication era in sharing information from one mobile device to another. These wireless devices (nodes) can form a temporary network called Ad-hoc network or they can use existing cellular network. Vehicular Ad-hoc Networks (VANETs) is a type of Ad-hoc network in which vehicles acts as nodes and communicates with the roadside units. VANETs are more helpful in implementing the Intelligent Transport Systems concepts to provide traffic situation, weather conditions and to perform safety warnings by using authentication mechanisms. In this paper, AODV routing protocol is used to implement the Intelligent Transport Systems (ITS) concepts in VANET. A simulation is performed using AODV routing protocol in NS2 to study the hurdles involved in providing a secure and data transfer between the vehicular nodes. The data analysis is done based on the results collected from the simulation environment. The data’s are traced out to find the absolute details of the network. Finally, the graphs are plotted for Throughput of dropped packets and Throughput of packets generated.
Keywords: VANET, AODV, Network Simulation, Intelligent Transport Systems, NS2.
Keywords: VANET, AODV, Network Simulation, Intelligent Transport Systems, NS2.
Abstract
Comparative Analysis Between BPSK and QPSK Modulation Technique Based on BER Analysis using V-BLAST Based MMSE Technique
MR. PRASHANT BHATI, MR. KISHOR P JADHAV
Abstract: The rich-scattering wireless channel is capable of huge theoretical capacities. The multiple input multiple output (MIMO) antenna system provides very promising gain in capacity without increasing the use of frequency spectrum, throughput, and power consumption in wireless communication. This also shows less sensitivity to fading, hence it leads to a breakthrough in the data rate of wireless communication systems. There are many schemes that can be used to MIMO systems such as space-time block code, space-time trellis code, and the Vertical Bell Labs Space- Time Architecture (V-BLAST). The V-BLAST is an ordered successive cancellation method applied to receiver and at every stage the stream with the highest SNR is decoded. In this proposes paper the analysis and performance of general MIMO system V-BLAST architecture with MMSE technique is used for linear detectors in fading channels with different antenna selections and digital modulation methods. In this proposed paper a comparative analysis between bpsk and qpsk modulation technique is given.
Keywords: MIMO, SIC, V-BLAST, MMSE.
Keywords: MIMO, SIC, V-BLAST, MMSE.
Abstract
Design of patch antenna based on metamaterial
PIYUSH MOGHE, P.K.SINGHAL
Abstract: Many needs of new generation communication system would be filled by electrically small, efficient antennas having significant bandwidth, if we reconcile these contradictory requirements. The introduction of metamaterials has provided an alternate design approach to obtain efficient electrically small antennas. These are the artificial materials which have engineered electromagnetic responses that are not readily available in nature. A micro-strip antenna based on metamaterial is proposed in this paper is to investigate the response of an antenna enclosed in metamaterial. With this design the return loss of -43dB has been achieved at the frequency of 1.6142 GHz.
Keywords: Microstrip antenna, Metamaterial based antenna
Keywords: Microstrip antenna, Metamaterial based antenna
Abstract
Multilevel Inverter Topology And Modulation Techniques A Review
ARPITA, TALI NAGWANI
Abstract: The requirement of high-voltage, high-power converters capable of producing high-quality waveforms forced the development of power switching and reduced switching frequency devices and equipments. Multilevel inverters proved itself as a vital utility with regard to semiconductor power switch voltage limit barriers. Presently research is ongoing to improve their capabilities further through optimized control techniques, and to minimize both component count and manufacturing cost. Owing to voltage limits power switches are typically cascaded in series and configured as multilevel structures. The outputs thus obtained are superior in quality resulting in reduced filter and overall system size requirement. Switching losses are greatly reduced, with lower switching frequency operation while mentaining high-power quality.
Keywords: Cascaded H-bridge, cascaded neutral-point, capacitor clamped inverter, five-level inverter, multicarrier phase-shifted pulse-width modulation (MCPS-PWM), multilevel inverter (MLI), transistor-clamped inverter
Keywords: Cascaded H-bridge, cascaded neutral-point, capacitor clamped inverter, five-level inverter, multicarrier phase-shifted pulse-width modulation (MCPS-PWM), multilevel inverter (MLI), transistor-clamped inverter
Abstract
Hardware efficient watermarking technique for finite state sequential circuit using STG
JEEBANANDA PANDA, ANKUR BHARADWAJ, NEETA PANDEY, ASOK BHATTACHARYYA
Abstract: Intellectual Property Protection (IPP) is very important for a design created by IP owner. For this, IP owner embeds watermark in its design. One such type of technique is suggested by Oliviera, in which modification of State Transition Graph (STG) of a digital circuit takes place in such a way that it is not possible for the intruder to find that there is a watermark embedded in the circuit. It is also possible to prove the piracy of the design in court-of-law. A method for state reduction in the watermarked circuit has been proposed in this paper. The comparison of simulation of non-watermarked, watermarked circuit with existing technique and the modified reduced state watermarked circuit is done using ModelSim Simulator. The Detection of Piracy can be done by using a counter circuit.
Keywords: Intellectual Property Protection, State Transition Graph, Watermark, Finite state machine, Signature sequence
Keywords: Intellectual Property Protection, State Transition Graph, Watermark, Finite state machine, Signature sequence
Abstract
Design and Analysis of Balanced Doubled Feed Square Patch Antenna using Finite Element Method
PRIYANKA BANSAL, DR. DARSHAN SINGH SIDHU
Abstract: This paper presents the design and implementation of a square patch antenna using finite element method. A balanced square patch antenna model has been constructed using FEM (Finite Element Method) with COMSOL multiphysics environment. A parametric analysis is carried out to analzse the performance of the proposed antenna on the basis of Antenna impedance, Radiation frequency and Radiation pattern. The proposed antenna is made for 6 GHz frequency. From the simulation results it is found that very good radiation lobes with negligible side lobes are obtained. The optimum values of power density and impedance of the antenna are also obtained at optimum frequency 6.18 GHz.
Keywords: FEM, MPA, Radiation, Impedance
Keywords: FEM, MPA, Radiation, Impedance
Abstract
An Improved Buck PFC Converter with High Power Factor
E.VENKATA CHALAPATHI, P.ANJAPPA, V.RAMESH
Abstract: In This paper an improved buck power factor correction (PFC) converter topology is proposed in this paper. By adding an aux-iliary switch and two diodes, the dead zones in ac input current of traditional buck PFC converter can be eliminated. An improved constant ON-time control is proposed and utilized in this improved buck PFC converter to force it that operates in critical conduction mode (CRM).In this paper of voltage source and current wave form in by using MATLAB/SIMULINK
Keywords: Buck Power Factor Correction (PFC), critical conduction mode (CRM), zero voltage switching (ZVS).
Keywords: Buck Power Factor Correction (PFC), critical conduction mode (CRM), zero voltage switching (ZVS).
Abstract
Improvement of Voltage Profile using D-STATCOM – Simulation under sag and swell condition
BRIJESH PARMAR, PROF. SHIVANI JOHRI, CHETAN CHODAVADIYA
Abstract: The study of shunt connected FACTS devices is a connected field with the problem of reactive power compensation and better mitigation of transmission related problems in today‟s world. In this paper we study the shunt operation of FACTS controller, the STATCOM, and how it helps in the better utilization of a network operating under abnormal conditions. Voltage sags and a swell in the medium and low voltage distribution grid impact on sensitive loads is severe. In this paper, the performance of voltage-source converter-based shunt compensators used for load voltage control in electrical power distribution network has been analyzed and compared, when a nonlinear load is connected across the load bus. . Possible control schemes and their effects on the oscillation attenuation are also studied. This research paper described DSTATCOM principles and voltage restoration methods for balanced and/or unbalanced voltage sags and swells in a distribution system. Simulation results were presented to illustrate and understand the performances of DSTATCOM under voltage sags/swells conditions. The MATLAB simulation verification of the results derived has been obtained using a model of the three-phase DSTATCOM.
Keywords: Voltage Source Converter(VSC), Distributed Static Compensator (DSTATCOM), Flexible Alternating Current Transmission System, (FACTS), load voltage control, Transient, nonlinear load, swell condition.
Keywords: Voltage Source Converter(VSC), Distributed Static Compensator (DSTATCOM), Flexible Alternating Current Transmission System, (FACTS), load voltage control, Transient, nonlinear load, swell condition.