Time filter

Source Type

Nagaraj P.,MepcoSchlenk Engineering College
Aerospace Science and Technology | Year: 2015

This paper discusses about a procedure to minimize the differences between analytical and experimental results of a space vehicle model by applying the finite element model updating procedure, in order to optimize the structures and processes before hardware is acquired. The material and geometric parameter set is formed for modal updating based on sensitivity analysis. Optimal values of experimental model parameters are determined using orthogonal array method. The updated finite element model produces more reliable results with the measured values. The method avoids irregularity and mismatch between the experimental and analytical model data sets, allowing flexible but automated model updating using neural network predicted parameters. The numerical results are compared with the experimental measurements and the divergences are measured by natural frequency difference and modal assurance condition. By training the neural network model based on the results and simultaneously adjusting the structural parameters, it is possible to reduce the difference between the measured and the predicted frequency values. © 2015 Elsevier Masson SAS. All rights reserved.


Vincent P.,MepcoSchlenk Engineering College
Journal of Structural Engineering (India) | Year: 2013

This study focuses on the full replacement of coarse aggregate with coconut shell, which is an agricultural waste and is a lightweight aggregate. Studies have been carried out on the strength characteristics, both compressive and tensile strengths of concrete, produced using crushed granular coconut shell as coarse aggregate with the replacement of cement by silica fume in the ratios of 0%, 5%, 10%, and 15% by weight of cement. Based on trial mix method a suitable mix proportion was arrived. Mix ratio of 1:1.58:0.6 and water cement ratio of 0.4 was used for this study. The air dry densities of coconut shell concrete ranged from 1940 - 1985 kg/m3 and these are within the limit of structural lightweight concrete. The 28 days compressive strength and splitting tensile strength of coconut shell concrete with silica fume are 22.66 N/mm 2 and 2.94 N/mm2 respectively which satisfy the minimum requirement of structural lightweight concrete as per ASTM C330. The investigation showed that the compressive strength and tensile strength of coconut shell concrete with silica fume give better result than coconut shell concrete without silica fume and an addition of 10% of silica fume gave optimum result.


Anand I.V.,MepcoSchlenk Engineering College | Kamaraj A.,MepcoSchlenk Engineering College
2014 International Conference on Information Communication and Embedded Systems, ICICES 2014 | Year: 2014

The circuits like Logic gates, Adders, Multipliers are the basic building block of the digital circuits. These combinational circuits can be designed by using the concepts of the reversible logic. The reversible logic is either a physically reversible or logically reversible. In this paper the combinational circuits are logically reversible. One of the applications of the reversible logic is Quantum Cellular Automata (QCA). QCA has attracted feature of extremely small feature size (at the molecular or even atomic scale) and its ultra-low power consumption, making it one candidate for replacing CMOS technology. Thus the design and realization of the Basic Logic gates and Combinational circuits like ripple carry adder, serial adder, multiplexer are done by using the concept of Quantum Cellular Automata. Also, the area and cost of the QCA system is reduced with the help of Coplanar architecture arrangement of cells. The paper is organized as follows; the section one gives the overall introduction about QCA, Clocking of QCA and Wires in QCA. Section two gives information about the basic logic gates. In Section three, design and Simulation of Combinational circuits like half adder, full adder, ripple carry adders and multipliers are discussed. At last the Comparison of Quantum cost of the above designs due to Coplanar architecture was elaborated. © 2014 IEEE.


Jeevitha S.,MepcoSchlenk Engineering College | Rajan S.E.,MepcoSchlenk Engineering College | Rakesh T.,MepcoSchlenk Engineering College
Proceeding of the IEEE International Conference on Green Computing, Communication and Electrical Engineering, ICGCCEE 2014 | Year: 2014

Thermoelectric power generation has emerged as a promising alternative green technology for the power generation from waste-heat. Thermoelectric devices generate voltage and output electrical power from waste heat to electronic load by meansof the temperature difference across the devices serving as anenergy source. This paper presents the high gain DC-DC boost converter, that has the coupled inductor with voltage multiplier produces a high voltage gain from very low input voltages of Thermo Electric Generator (TEG) for a moderate duty cycle to reduce voltage and current stresses within the converter. In this investigation, 16W TEG module (TEP1-12656-0.6) is used as a DC source to analyze the proposed converter for various temperature differences (ΔT = 270°C, 245°C, 195°C, 145°C, 95°C, 45°C). A MPPT method of tracking the maximum power point and forcing the system to operate close to this point is used at ΔT=270°C using a Perturb and Observe (P&O) and Incremental Conductance (INC) algorithm. The proposed high gain DC-DC converter is simulated using PSIM 9.0 software package. Analysis and simulation are carried out, and the measured results are presented here for validity of the proposed technique. © 2014 IEEE.


Anuradha C.T.,MepcoSchlenk Engineering College | Saravanan R.,PandianSaraswathi Engineering College
International Journal of ChemTech Research | Year: 2015

In Madurai, there are 18,646 industries functioning, which resulted in contamination of ground water characteristics in the nearby area to analyses the soil contamination. The disturbed soil samples were collected from 6 locations (4 industrial areas, 1 residential area and 1 agricultural area) at 0.3m depth. The chemical properties of soil such as pH, Electrical conductivity, Organic matter, Total dissolved solids, Macro nutrients and Micro nutrients were determined. The geo co-ordinates of sampling location were obtained using GPS. Based on the concentration of chemical constituents present in soil in all the locations, a continuous surface has been created by various spatial interpolation techniques such as Inverse Distance Weighted, Spline, Kriging and trend using GIS technology. By cross validation technique the interpolation techniques for various chemical parameters are identified. In order to assess the degree of soil contamination the consistency index map is generated. This map can be used to classify the study area as very high to low contaminated soil. Thus the GIS approach of analyzing soil contamination provides permanent base for monitoring contaminated sites and also to understand the level and extent of contamination. From this project the comparative analysis among land uses can be made, so that we can prefer areas for various land usage and can recommend crops based on the report. In this project we will also do a comparative study between each interpolation technique with the manually tested value and find out the best interpolation technique. © 2015, Sphinx Knowledge House. All rights reserved.


Hynes N.R.J.,MepcoSchlenk Engineering College | Nagaraj P.,MepcoSchlenk Engineering College | Sujana J.A.J.,MepcoSchlenk Engineering College
Materials and Design | Year: 2014

Friction stud welding is a promising technique in many applications related to oil and gas industries. It is used to attach grating to offshore oil platforms in areas where arc welding is not permitted because of the risk of causing a fire or explosion. Attachment of anodes inside seawater discharge pipelines in a gas processing plant is performed by this process. This solid state joining process permits metal combinations such as welding of aluminum studs to steel which would be problematic with arc welding because of the formation of thick and brittle inter-metallic compounds. In the present work, AA 6063 is joined to AISI 1030 steel using friction stud welding machine. Properties that are of interest to manufacturing applications such as Young's modulus, longitudinal velocity, bulk modulus and shear modulus are evaluated by means of an ultrasonic flaw detector. At the interface of the joint, there is an increase of 4.4%, 1.8%, 1.15% and 4.42% is observed for the properties Young's modulus, longitudinal velocity, bulk modulus and shear modulus respectively. This is due to the formation of intermetallic compound and increase in hardness at the interfacial region. Energy Dispersive X-ray analysis confirms the presence of FeAl as the intermetallic compound. Scanning Electron Microscope evaluation shows the presence of an unbound zone at the center of the inner region which is due to the minimum rotational speed and low axial load experienced at that point. In the unbound zone, there is an incomplete bond between dissimilar metals and it is detrimental to joint strength. Optimum value of friction time and usage of pure aluminum interlayer during the friction stud welding process hinders the formation of unbound zone and enhances the quality of AA 6063/AISI 1030 joints. The tensile strength of AA 6063/AISI 1030 joint was found to be 36.64% and 78.15% lower than that of AA 6063 and AISI 1030 respectively. Reasons for lower joint strength are attributed to low frictional pressure, non-optimal rotational speed and friction time, improper mechanical mixing, presence of oxide layer and formation of brittle intermetallic compound at the joint interface. © 2014.


Sundareswaran N.,MepcoSchlenk Engineering College | Vinoth P.,MepcoSchlenk Engineering College
Proceedings - 2014 3rd International Conference on Eco-Friendly Computing and Communication Systems, ICECCS 2014 | Year: 2014

The emergence of mobile internet indirectly spreads the malware more rapidly. The potential effects of malware propagation on mobile users and service providers would not be compromised. Malware residing in the internet can now use mobile devices and networks to propagate. To counter the challenge of mobile malware, we need to adopt more robust security enforcement mechanism. Our research problem is to deploy an efficient preventing system to help infected nodes to recover from further infection. Our system design uses cloud environment rather than the mobile devices, therefore co-location of multiple virtual machines and sharing the same resources increase the speed of analysis and allowing the application of multiple detection techniques simultaneously with the consideration of the heterogeneity of mobile devices and malware to prevent the malware propagation under the real world mobile system. The proposed system takes exact replicas of the phones in virtual environment. Application provisioning, maintenance, high availability and disaster recovery are inherent in the virtual environment. Our work considers the case of cross-OS malware. © 2014 IEEE.


Jeeva S.,MepcoSchlenk Engineering College | Prabha N.R.,MepcoSchlenk Engineering College | Bhavani R.,MepcoSchlenk Engineering College
Proceedings of IEEE International Conference on Circuit, Power and Computing Technologies, ICCPCT 2016 | Year: 2016

The continuity of supply and quality of power supplied to the customers must be uninterrupted from the reliability point of view. The Dynamic Voltage Restorer (DVR) is a custom power device which has an advantage of fast dynamic response and can generate real or reactive power independently. This paper presents the improved topology for DVR by the integration of Proton Exchange Membrane Fuel Cell (PEMFC) with boost converter as a DC input to the DVR. Thus the proposed DVR ensures a constant DCvoltage across the DC link during the process of voltage compensation with active power injection to the grid. The performance of the proposed work is endorsed by comparing the results with conventional DVR and the simulation results are also validated to prove the effectiveness of the proposed work. © 2016 IEEE.


Suresh S.,Kalasalingam University | Kannanand S.,Ramco Institute of Technology | Manikandan B.V.,MepcoSchlenk Engineering College
Proceedings of IEEE International Conference on Circuit, Power and Computing Technologies, ICCPCT 2016 | Year: 2016

This paper presents the performance and power quality analysis of Asymmetrical Cascaded Multilevel Inverter in terms of various parameters like voltage, current and Total Harmonic Distortion. Simulations of Asymmetrical Cascaded Multilevel Inverter are performed and analyzed for different levels of output voltages with harmonic profile. Genetic Algorithm is used to find out the switching angles at fundamental frequency through optimized harmonic elimination technique. From simulation and experimental results, Genetic Algorithm has improved the harmonic profile of voltage and current for various possible Modulation Index values. Experimental results are compared with the simulation results for showing reduction of lower order harmonics after applying Genetic Algorithm based switching angles. Improvement has been achieved in voltage and current waveform. Total Harmonic Distortion and switching losses have been measured for various Modulation Index values. © 2016 IEEE.


Dharshana K.S.,MepcoSchlenk Engineering College | Balasubramanian K.,MepcoSchlenk Engineering College | Arun M.,MepcoSchlenk Engineering College
Proceedings of IEEE International Conference on Circuit, Power and Computing Technologies, ICCPCT 2016 | Year: 2016

As cloud computation becomes mainstream, the need to ensure the privacy of the data entrusted to third parties keeps raising. But the actual computation inside cloud microprocessors remains unencrypted. Thus, the opportunity of leakage is theoretically possible. Therefore, to address the challenge of protecting the computation inside the microprocessor, we introduce novel general purpose architecture for secure data processing. This new design utilizes single instruction architecture and provides native processing of the encrypted data at the architecture level. The security of the solution is assured by a variance of Paillier's Homomorphic encryption scheme, used to encrypt data when given as input manually and when retrieved from a memory location. So, here we use Paillier scheme (in homomorphic encryption) to work with One Instruction Set Computer (OISC). © 2016 IEEE.

Loading MepcoSchlenk Engineering College collaborators
Loading MepcoSchlenk Engineering College collaborators