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Mohan Krishna S.,Vellore Institute of Technology | Mohan Krishna S.,Amrita University | Febin Daya J.L.,Vellore Institute of Technology | Febin Daya J.L.,Manonmaniam Sundarnar UniversityTamilnadu | And 2 more authors.
International Journal of Power Electronics and Drive Systems | Year: 2015

Speed Estimation without speed sensors is a complex phenomenon and is overly dependent on the machine parameters. It is all the more significant during low speed or near zero speed operation. There are several approaches to speed estimation of an induction motor. Eventually, they can be classified into two types, namely, estimation based on the machine model and estimation based on magnetic saliency and air gap space harmonics. This paper analyses the effect of incorrect setting of parameters like the stator resistance, rotor time constant, load torque variations and also Voltage unbalance on various adaptive control based speed estimation techniques fed from the machine model. It also shows how the convergence mechanisms of the adaptation schemes are affected during these conditions. The equivalent models are built and simulated offline using MATLAB/SIMULINK blocksets and the results are analysed. © 2015 Institute of Advanced Engineering and Science. All rights reserved. Source

Sambasivam G.,Pondicherry University | Ravisankar V.,Bharathiar University | Vengattaraman T.,Pondicherry University | Baskaran R.,Anna UniversityTamilnadu | Dhavachelvan P.,Pondicherry University
Procedia Computer Science | Year: 2015

In today's world web services are the known perception to all the users who uses the internet. The Web Service process involves service discovery, selection and ranking. Discovery is the process of matchmaking of user query with advertisements in the repository. Our motivation is to develop a model for web service discovery with the combined approach of service selection and ranking. In this paper, we have proposed a technique for web service discovery process, combining the keyword search and semantic search and ranking the services. The implementation results show that the proposed model performs better for the web service discovery process. © 2015 The Authors. Source

Ravisankar V.,BharathiarUniversityTamilnadu | Sujatha P.,Pondicherry University | Baskaran R.,Anna UniversityTamilnadu | Dhavachelvan P.,Pondicherry University
International Journal of Applied Engineering Research | Year: 2015

Information retrieval system plays a vital role in extraction of relevant information. Many researchers have been working on for satisfying user needs, tough the problem arises when accessing multiple languages‟ information. This Multilingual environment provides a platform where a query can be formed in one language and the result can be in the same language and/or different languages. This Methodology is suitable for analyzing the multilingual web services. Performance evaluation of Information Retrieval for monolingual environments especially for English are developed and standardized from its inception. There is no standardized evaluation model available for evaluating the performance of multilingual environments or systems. The unavailability of MLIR domain specific standards is a challenging task. This paper proposes a MLIR specific performance evaluation standard using Principal Component Analysis (PCA), which can facilitate the researchers and developers to improve the quality of the MLIR systems in the present and future scenarios. © Research India Publications. Source

Arunvivek G.K.,Anna UniversityTamilnadu
International Journal of Applied Engineering Research | Year: 2015

In this study properties of concrete contain natural and recycled fresh concrete waste aggregates (RFCWA) were investigated. RFCWA was obtained from Ready Mix Concrete plants. Natural coarse aggregate in concrete was replaced by RFCWA. The replacement proportions were 0%, 15%, 20%, 40%, 60%, 80% and 100%. Mechanical properties such as compressive strength, flexural strength and split tensile strength were determined for hardened concrete and for fresh concrete workability was determined. Rinsed Air Dried (RAD) method is used to improve the quality of RFCWA. The test result shown that concrete contain 15% RFCWA is optimum for producing normal strength recycled aggregate concrete. © Research India Publications. Source

Lavanya S.,Anna UniversityTamilnadu | Bhaskaran V.M.,AnnaUniversityTamilNadu
International Journal of Applied Engineering Research | Year: 2015

Wireless Sensor Network generally deployed in natural environment, so large number of security is emits are there. Protect the data in WSN require approaches that will make data transmission more secure from the attackers. Data transmission can be performed based on cluster using imperialist competitive algorithm. It can partition the cluster in to sub-clusters and compete with each other until one of these cluster nodes is preferred. For efficient data transmission to exploit key selection from elliptic curve as an Aeolian group with point as fundamentals,ECAES algorithm is used. To pass up fake identities in packet can be transferred, the dissimilar approach called fake agent attackers is used which prevent the traffics and fake distinctiveness of nodes located at communication range around target area. Energy efficiency can be improved by using Adequate energy which select the most appropriate neighbor node with position closeness and substitute node is not only required to be close to the faulty node to ensure the correctness of sensing, but also have higher residual energy to guarantee further constancy. So the efficient utilization of algorithm is used to reduce dropping ratio and minimize overhead © Research India Publications. Source

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