Thiruvallur, India
Thiruvallur, India

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Krishna K.L.,Sri Venkateswara College of Engineering | Reena D.,S.V.C.E.T.
2014 International Conference on Information Communication and Embedded Systems, ICICES 2014 | Year: 2014

Sigma-Delta modulators are commonly used in applications that require high resolution. In this paper a IV second order sigma delta ADC is presented. In this paper over sampling concept is used to address the problem of power dissipation and noise in ADCs. A second order sigma delta modulator is implemented using CMOS 130nm technology. Oversampling ratio is 128 and total power dissipation is found to be 68μW and area occupied is found to be 24μm ×30μm. © 2014 IEEE.

Vadivelu K.R.,SVCET
International Journal on Electrical Engineering and Informatics | Year: 2015

Optimal reactive power planning is one of the major and important problems in electrical power systems operation and control. This is nothing but multi-objective, nonlinear, minimization problem of power system optimization. This paper presents the relevance of New Improved Differential Evolution (NIDE) algorithm to solve the Reactive Power Planning (RPP) problem based on Multi-objective optimization. Minimization of total cost of energy loss and cost of FACT controlers installments are taken as the objectives incorporating (RPP) problem. With help of New Voltage Stability Index (NVSI), the critical lines and buses are identified to install the FACTS controllers. The optimal settings of the control variables of the generator voltages, transformer tap settings and provision and parameter settings of the FACT controllers SVC, TCSC, and UPFC are considered for reactive power planning. The approach applied to IEEE 30 and 72-bus Indian system for minimization of active power loss. Simulation results are compared with other optimization algorithm. © 2015, School of Electrical Engineering and Informatics. All rights reserved.

Venkatesh C.,AITS | Sekhar C.C.,SVCET | Venugopal M.,AITS | Kumar M.B.P.,AITS
2013 International Conference on Optical Imaging Sensor and Security, ICOSS 2013 | Year: 2013

In present days there is a huge interest on underwater communication systems for various applications to explore aqueous environments. Intelligent robots and cooperative multi-agent robotic systems can be very efficient tools to speed up search and research operations in remote areas. Robots are also useful to do jobs in areas and in situations that are hazardous for human. Under water robots explores the science and technologies for the interpretation of underwater video footage, the identification of underwater features, human-robot interaction, vehicle control, position estimation and mechanical design. Key applications for under water are the assessment of marine habitats and biodiversity on coral reefs. In this paper, a wireless underwater robot system is designed in order to study the behavior of small living organisms. A idea has been presented for underwater robot system which is consists of two parts, first is the underwater mechanical robot and the second is ZigBee wireless based robot which controls and moves the first part. By this system different patterns motion control (Linear, Circular.) has been performed and monitoring the underwater robot control with the help of water proof RF wireless camera and also explore the details present around the mobile robot. © 2013 IEEE.

Vijay Kumar Y.N.,SVCET | Sivanagaraju S.,UCEK | Suresh C.V.,Vasireddy Venkatadri Institute of Technology
Ain Shams Engineering Journal | Year: 2015

The utilization of electrical energy due to urbanization and industrialization is increasing day by day, and due to this, there is chance of increasing the uncertainties in a given power system and that affects the economy of the country. The conventional power system in the presence of flexible AC transmission system (FACTS) controllers is an alternative to solve this problem and can increase the power system capability to handle rapid changes in operating conditions of the system. In general, multi-line FACTS controllers are effective than single line FACTS controllers. In this paper, a detailed mathematical modeling of IPFC is presented and the effect of an optimal location is also analyzed. A novel optimization algorithm i.e. modified BAT algorithm is proposed to solve optimal power flow problem in the presence of IPFC including system constraints and device limits. The proposed methodology has been tested on standard test systems. © 2015 Faculty of Engineering, Ain Shams University.

Raja R.S.,PET Engineering College | Manisekar K.,Center for Manufacturing science | Manikandan V.,SVCET
Key Engineering Materials | Year: 2011

Fibre reinforced polymer composites play an incredible role in almost all spheres of day to day life and the field of carbon composites is one of the prime research area in recent decade. Polymers are mostly reinforced with fibre or fillers to obtain better mechanical properties. The properties of the polymer composites can be improved largely by varying the type of filler/fibre materials and its volume percentage. Composites properties depend on the size, shape and other physical properties of the reinforcements. A relative easy way to improve the mechanical properties of a polymer is the addition of filler materials. In all particulate filled systems, the adhesion between the matrix and filler plays a significant role in determining the key properties such as strength and toughness. The mechanical properties of composites are also influenced by the filler's nature, size and distribution profile, aspect ratio, volume fraction, the intrinsic adhesion between the surfaces of filler and polymer. In this paper, the effect of filler material on mechanical properties of E-Glass fibre reinforced polymer has been studied out by varying filler materials. For these study three different types of specimens were prepared, viz FRP without filler material, the FRP with 10 volume percentages of carbon black and the FRP with 10 volume percentage of Fly ash as filler material. The polyester composites were fabricated by hand-layup method. Mechanical properties of the specimens are analyzed using computerized Universal Testing Machine as per ASTM D 638 standards. The resulting behavioral patterns of the FRP with filler material are listed and compared to those of the FRP without filler material. Mechanical properties such as ultimate tensile strength, percentage of elongation, yield strength, Poisson's ratio and percentage reduction in area were found out. © (2011) Trans Tech Publications.

Satheesh Raja R.,PET Engineering College | Manisekar K.,Center for Manufacturing science | Manikandan V.,SVCET
Materials and Design | Year: 2014

This paper describes the mechanical behavior of fly ash impregnated E-glass fiber reinforced polymer composite (GFRP). Initially the proportion of fiber and resin were optimized from the analysis of the mechanical properties of the GFRP. It is observed that the 30. wt% of E-glass in the GFRP without filler material yields better results. Then, based on the optimized value of resin content, the varying percentage of E-glass and fly ash was added to fabricate the hybrid composites. Results obtained in this study were mathematically evaluated using Mixture Design Method. Predictions show that 10. wt% addition of fly ash with fiber improves the mechanical properties of the composites. The fly ash impregnated GFRP yields significant improvement in mechanical strength compared to the GFRP without filler material. The surface morphologies of the fractured specimens were characterized using Scanning Electron Microscope (SEM). The chemical composition and surface morphology of the fly ash is analyzed by using Energy Dispersive Spectroscopy (EDS) and Scanning Electron Microscope. © 2013 .

Venkatesan E.,VLSI Design | Kolanchinathan V.P.,SVCET
2014 International Conference on Information Communication and Embedded Systems, ICICES 2014 | Year: 2014

This paper presents a hardware implementation of a digital watermarking system that can insert invisible watermark information into video streams in real time. The watermark embedding is processed in the integer based wavelet transformation, lifting and least significant bits approach. To achieve high performance, the proposed system architecture employs pipeline structure and uses parallelism. Hardware implementation using field programmable gate array has been done, and an experiment was carried out using a custom versatile breadboard for overall performance evaluation. Experimental results show that a hardware-based video authentication system using this watermarking technique features minimum video quality degradation and can withstand certain potential attacks, i.e., cover-up attacks, cropping, and segment removal on video sequences. Furthermore, the proposed hardware based watermarking system features low power consumption, low cost implementation, high processing speed, and reliability. © 2014 IEEE.

MuraliMohanBabu Y.,SVCET | Subramanyam M.V.,SREC | GiriPrasad M.N.,JNTUA
Procedia Computer Science | Year: 2015

In synthetic aperture radar (SAR) imaging, pulses of microwave energy are transmitted towards the ground surface (target). The backscattered signal energy is measured at the receiving end. In this process, a speckle noise is added because of the coherent imaging system and makes the study of images very difficult. For better SAR image processing, the speckle has to be removed in the initial stages of processing and maintain all texture features efficiently. The (Block Matching 3D algorithm) BM3D method is generally considered as state of art method in denoising of SAR images. Still some amount of speckle left with images. This is due to sampling conversion at transmitter and receiver. In this paper, it is proposed a technique to despeckle the speckle noise to the maximum extent while maintaining the edge characteristics. This technique uses un-sampling at both the ends. © 2015 The Authors.

Chandrasekhar C.,SVCET | Reddy S.N.,Andhra University
International Journal of Signal and Imaging Systems Engineering | Year: 2014

With the development in VLSI technology, leading to growth in transistor count on a single chip have led to increase in implementation of complex signal processing algorithms. 3D DWT is a complex algorithm for video coding which is replacing motion estimation and compensation technique. In this paper, a review of various 2D architectures for DWT-IDWT is discussed, complexity measures of 2D DWT architectures for VLSI implementation is presented. A 3D model for DWT-IDWT is developed and is verified for its functionality for video encoding. The simulation results demonstrate the advantages of 3D DWT-IDWT model over 2D for video encoding. The developed model can be used for medical applications. Copyright © 2014 Inderscience Enterprises Ltd.

Rao S.R.,SVCET | Padmanabhan G.,A.P.S. University | Naidu K.M.,SVCET | Reddy A.R.,SVCET
Procedia Engineering | Year: 2014

Metal-matrix composites (MMCs) have been increasingly used in automotive and aerospace industries because of their superior properties compared to unreinforced alloys. These materials are difficult-to-machine by conventional machining methods because of the hard and abrasive reinforced particles. The present work investigates the effect of voltage, electrolyte concentration and feed rate on radial over cut in electrochemical drilling of Al/B4Cp metal matrix composites. Experiments have been conducted on electrochemical machine according to the principles of Taguchi's design of experiments method. Regression analysis was employed to develop mathematical model for radial over cut. Adequacy of the developed mathematical model has been tested using analysis of variance. Effect of machining parameters and their interactions were studied through the contour plots. © 2014 The Authors.

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