Mailam Engineering College

India

Mailam Engineering College

India
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Periyaazhagar D.,Bharath University | Irusapparajnar G.,Mailam Engineering College
International Journal of Power Electronics and Drive Systems | Year: 2016

In this paper, the suggested topologies are gained by cascading a full bridge inverter with dissimilar DC sources. This topology has several new patterns adopting the fixed switching frequency, multicarrier control freedom degree with mixture conceptions are established and simulated for the preferred three-phase cascaded multilevel inverter. In outstanding switching arrangement terminations, there are convinced degrees of freedom to produce the nine level AC output voltages with terminated switching positions for producing altered output voltages. These investigations focus on asymmetrical cascaded multilevel inverter engaging with carrier overlapping pulse width modulation (PWM) topologies. These topologies offer less amount of harmonics present in the output voltage and superior root mean square (RMS) values of the output voltages associated with the traditional sinusoidal pulse width modulation. This research studies carries with it MATLAB/SIMULINK based simulation and experimental results obtained using appropriated prototype to prove the validity of the proposed concept. © 2016 Institute of Advanced Engineering and Science. All rights reserved.


Ramalingam M.,Mailam Engineering College
European Journal of Scientific Research | Year: 2012

In the art of utilizing the web services/ resources, authorization plays more vital role. A semantic-aware access control mechanism assures to provide an access right to the authorized users. Few access control models consider the rich semantic relations between the requested service as well as the availing services. However, they offer only coarsegrained access, which will not filter out the services that do not met both the service providers' policies as well as the users' policies. To solve the issues, a new framework is proposed in this paper. The framework is comprised of two separate ontologies to maintain the semantic information of policies that are submitted by users and service providers and the semantic information of services, a service locator for identifying the exact services and an access control engine for offering access to the users. The framework is implemented and its performance is analyzed using precision, recall and F-score measures. The measured values prove that the framework is effectual in offering fine-grained web services. © EuroJournals Publishing, Inc. 2012.


Rajini Girinath D.,Mailam Engineering College
Telecommunication Systems | Year: 2013

The aim of the research is to regulate the vehicular traffic in the most effective and efficient way in Vehicular Adhoc Networks (VANET). The challenges faced by the existing networks are ripple effect of reclustering, communication complexity, mobility, throughput and delay in an urban environment. Moreover unpredictable topology changes in VANET, obstruct expected packet delivery ratio and leads to congestion by overheads for link maintenance. The existing routing techniques suffer from excessive loss of data, delay and need for continuous monitoring where group member's loss their link in randomwaypoint mobility scenarios. In this paper, a novel hierarchical model combining the features of hierarchical clustering, hybrid mobility model and location based 2hop Multicast Flooding (L2MF) for data forwarding has been proposed. By comparing the proposed protocol with previous protocols, the enhanced performance in packet delivery ratio, control overhead, and end-to-end delay has been proved. © 2011 Springer Science+Business Media, LLC.


Ravisankar R.,Government of Tamilnadu | Sivakumar S.,Mailam Engineering College | Chandrasekaran A.,SSN College of Engineering | Kanagasabapathy K.V.,Indira Gandhi Center for Atomic Research | And 2 more authors.
Applied Radiation and Isotopes | Year: 2015

The study of heavy metal pollution in coastal sediments assumes importance with respect to environmental ecology in view of the rapid industrialization and increased anthropogenic activities. The concentrations of Mg, Al, K, Ca, Ti, Fe, V, Cr, Mn, Co, Ni and Zn were measured in twenty sampling sites along the east coast of Tamilnadu, India by energy dispersive X-ray fluorescence spectroscopy (EDXRF). Natural background values were used to delineate their origin as geogenic or anthropogenic. To interpret and assess the contamination status for heavy metals in sediments, four metal pollution indices used such as an enrichment factor, a geo-accumulation index, a contamination factor and a pollution load index. Multivariate statistical methods were applied to identify the source of heavy metals. Heavy metal toxicity risk was assessed using sediment quality guidelines. The presented methodology was used to determine the anthropogenic origin of heavy metals in the sediment. © 2015 Elsevier Ltd.


Govindan P.,Mailam Engineering College | Srinivasan V.,Annamalai University
Journal of Advanced Microscopy Research | Year: 2016

In this study, an attempt has been made to reinforce Poly Lactic Acid (PLA) with Basalt/Sisal fibers. Three different proportions of hybrid composites were prepared by blending PLA and treated basalt/sisal fibers using Twin Screw Extruder. The extruded pellets were then moulded to ASTM standards using Injection Moulding technique. The mechanical properties such as tensile, flexural and Impact strength were investigated and DSC is employed to study the crystallization and melting behavior of composites. Thermo-mechanical properties of hybrid composites were studied using Dynamic Mechanical Analysis (DMA) and Thermo Gravimetric Analysis (TGA). Scanning Electron Microscopy (SEM) conducted on the fracture surfaces of the hybrid composites reveals superior interfacial linkage between the hybrid fiber and Poly lactic acid matrix. The results suggest that PLA reinforced with 10 wt% of basalt and 10 wt% of sisal fibers (PBSi-3) were found to have good mechanical and thermal properties when compared to PBSi-2 (7.5% Basalt and 7.5% Sisal) and PBSi-1 (5% Basalt and 5% Sisal) composites. Copyright © 2016 American Scientific Publishers All rights reserved.


Periyaazhagar D.,Bharath University | Irusapparajan G.,Mailam Engineering College
International Journal of Modelling, Identification and Control | Year: 2016

This paper represents the comparison of carrier-based bipolar pulse width modulation technique such as phase disposition, phase opposition disposition, alternating phase opposition disposition, carrier overlapping and variable frequency for the choice of three phase nine level cascade multilevel inverters. In this paper, cascade multilevel inverter topology with a multiconversion cell consists of two unequal voltage sources and it produces nine level output voltages at load terminal. Simulation results are performed by using MATLAB/Simulink. It indicates that alternating phase opposition disposition pulse width modulation provides higher output voltage with less harmonic distortion for all pulse width modulation techniques. It is also observed that the carrier overlapping pulse width modulation technique provides higher fundamental RMS output voltage for all pulse width modulation techniques. Copyright © 2016 Inderscience Enterprises Ltd.


Ravisankar R.,Government of Tamilnadu | Sivakumar S.,Mailam Engineering College | Chandrasekaran A.,Vellore Institute of Technology | Prince Prakash Jebakumar J.,Indian National Institute of Engineering | And 3 more authors.
Radiation Physics and Chemistry | Year: 2014

Natural and artificial radionuclide pollutants of the marine environment have been recognized as a serious environmental concern. The natural radioactivity levels in beach sediment samples collected from Thazhankuda (Cuddalore) to Kodiyakkarai along East Coast of Tamilnadu have been determined. Sediment sample were collected by a Peterson grab sampler from 10m water depths parallel to the shore line. The grab sampler collects 10cm thick bottom sediment layer from the seabed along the 20 stations. The radioactivities of 20 samples have been measured with a NaI(Tl) detector. The average specific activities for 238U, 232Th, and 40K were found to be 3.67, 37.23 and 387.17Bqkg-1 respectively. The results have been compared with other radioactivity measurements in different countries. It shows that the average activity of 238U and 40K is lower whereas 232Th is slightly greater than the compared worldwide average value. The radiation hazard due to the total natural radioactivity in the study area was estimated by different approaches such as the radium equivalent activity (Raeq), absorbed dose rate (DR), hazard indices, the annual gonadal dose equivalent (AGDE) and annual effective dose equivalent (AEDE) are compared with the international recommended values. Multivariate Statistical analyses (Pearson Correlation, Cluster and Factor analysis) were carried out between the parameters obtained from the radioactivity to know the existing relations and to study the spatial distribution of radionuclide. © 2014 Elsevier Ltd.


Kalaivani M.,Mailam Engineering College | Suganthi S.,Mailam Engineering College
International Journal of Control Theory and Applications | Year: 2016

This project deals with the application of distribution generation with energy storage system connected to the low- voltage microgrid by coupling inverter for simultaneous energy management and other aucillary services that include the compensation of power quality disturbances. To address inaccurate power sharing problems in autonomous islanding microgrid, an enhanced droop control method through online virtual impedance adjustment is proposed. First, a term associated with DG reactive power, imbalance power, or harmonics power is added to the conventional real-power frequency droop control. Vector proportional integral (VPI) control algorithm is presented for storage inverter, which enables storage unit to be charged or discharged according to assumed schedule and to contribute to power quality improvement through the compensation of reactive power, current harmonics and unbalance .The feasibility of the proposed method is verified by simulated (by using MATLAB software) and experimental results from a low-power microgrid prototype. © International Science Press.


Ramya R.,Mailam Engineering College | Krishna Kumar V.,Mailam Engineering College
International Journal of Control Theory and Applications | Year: 2016

Three phases Switched Boost Inverter (SBI) for induction Motor drive have been proposed. Switched boost inverter topology is arrived from Z-source inverter alteration. The Z-source inverter (ZSI) uses pair of L and C network impedance connected between the inverter and the Power Source. The merit of using ZSI in motor drive is that, it can be operated in buck or boost mode. When adapting the ZSI to induction motor drives, it minimizes the torque ripple, when operating in boost mode. In ZSI the impedance arrangement increases the cost, size and weight of the inverter. Hence in the proposed topology the ZSI is replaced by SBI. The SBI minimizes the pair of L and C component to single. And also the PV panel is connected to the SBI for enhancing the utilization of Dc supply. The performance of the SBI is continuous and better when the PV is connected. The analysis of three phases SBI, along with induction motor drive control strategy have been enlightened in this paper. From the literature, induction motor has many control strategies for minimizing the torque ripple and harmonic spectrum. Those strategies requirements increase the cost. Hence the proposed work has been validated using Matlab2013a. When adopting three phase SBI to drive three phase induction motor results better improvement in torque ripple minimization, Total Harmonic Distortion (THD).The MPPT on PV panel is used to increases the performance Of the induction motor, when the MPPT is high at which the PV panel produces the maximum power is analyzed in this paper. © International Science Press.


Muthukumar G.G.,Mailam Engineering College | Victoire T.A.A.,Anna University
2011 1st International Conference on Electrical Energy Systems, ICEES 2011 | Year: 2011

This paper demonstrates the control parameter optimization using a hybrid Differential Evolution (DE) - Adaptive Neuro-Fuzzy Inference System (ANFIS) technique for permanent-magnet brushless DC (BLDC) motor drive system ensuring deadbeat response. The parameter settings are further used in adaptive current and speed controllers to attain the objective in a BLDC drive system. The parameters of both inner-loop and outer-loop PI controllers, which vary with the operating conditions of the system, are adapted in order to maintain deadbeat response for current and speed. The ANFIS is modeled using the evenly distributed operating points selected within preset regions of system loading. The optimized data from DE are used to train the ANFIS that could deduce the controller parameters at any other loading condition within the same region of operation. © 2011 IEEE.

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