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Acharya S.,College of St. Joseph | D'Mello D.A.,Canara Engineering College
Proceedings of the International Conference on Inventive Computation Technologies, ICICT 2016 | Year: 2017

Cloud computing is a vigorous technology by which a user can get software, application, operating system and hardware as a service without actually possessing it and paying only according to the usage. Load balancing is a critical aspect that ensures that all the resources and entities are well balanced such that no resource or entity neither is underloaded nor overloaded. The load balancing algorithms can be static or dynamic. In this paper, an enhanced dynamic load balancer based on HTV load balancer has been implemented which permits the user to input the number of hosts, VMs, job requests and also the type of application to perceive priority considerations for executing the jobs. The results obtained from the proposed load balancer portrays that it is adept to achieve better performance, resource utilization and load balancing than the HTV load balancer. © 2016 IEEE.

Bhat S.,Canara Engineering College | Nagaraja H.N.,Ahmedabad University
International Journal of Electrical Power and Energy Systems | Year: 2015

The buck-boost converter is controlled using different algorithms like voltage mode control, current mode control, V2 control, enhanced V2 control, Sliding Mode Control (SMC), and Proportional Integral (PI) control. In all these algorithms the steady state error is more. On combining PI control and sliding mode control the steady error can be minimized. In industry and commercial applications involving Photo-Voltaic (PV) systems, uses buck-boost converter. In this converter above control algorithms are implemented using hardware circuitry or microcontroller. In industry and commercial applications Digital Signal Processor (DSP) is used for automation purposes and the same DSP can be used to implement control algorithms so as to get maximum electrical energy from solar energy. The efficient utilization of resources such as DSP is achieved as we are using the same DSP for implementing control algorithm. In the proposed study, PI control method and sliding mode control methods are combined to obtain a Proportional Integral Sliding Mode Control (PISMC) and it is used to control the buck-boost converter which is used to drive the electrical loads from solar energy. The buck-boost converter is designed, simulated and implemented. The algorithms PI, SMC and PISMC are simulated in using MATLAB simulink and then implemented in DSP TMS 320 2808. In the proposed study PISMC, a stable and efficient output voltage is obtained in which the steady state error and maximum overshoot are minimum. The PISMC is better in terms of transient and steady state performances as validated by our experiments. The proposed study will work in real-time since DSP is used for implementing the control algorithms and found to be better in terms of speed and regulation. The proposed DSP based PISMC can also be used to control other types of DC-DC converters. ©2015 Elsevier Ltd. All rights reserved.

Suresh R.,Canara Engineering College | Samuel G.L.,Indian Institute of Technology Madras
Procedia Engineering | Year: 2012

In the present study, an attempt has been made to investigate the effect of cutting parameters on cutting forces and tool wear in hard turning of AISI H13 tool steel using ceramic tool. The machining experiments were performed in accordance to Central Composite Design (CCD). The second order regression model of machining forces and tool wear has been developed. The influence of each operating factors have been studied through analysis of variance (ANOVA) technique. The obtained results reveal that, cutting speed and depth of cut have significant effect on feed force whereas feed rate and depth of cut are factors that significantly influences on thrust force. The depth of cut and cutting speed has predominant effect on tool wear. Feed rate have less significant effect on tool wear. But, in case of cutting force modeling, all the three parameters have significant effect. Key parameters and their effects on tool wear and cutting forces have also been presented in graphical contours which may help for choosing operating parameter preciously. Optimized model indicates desirability level for economy in hard turning process. © 2012 Published by Elsevier Ltd.

Suresh R.,Canara Engineering College | Basavarajappa S.,Davangere University | Samuel G.L.,Indian Institute of Technology Madras
International Journal of Refractory Metals and Hard Materials | Year: 2012

The hard turning process with advanced cutting tool materials has several advantages over grinding such as short cycle time, process flexibility, compatible surface roughness, higher material removal rate and less environment problems without the use of cutting fluid. However, the main concerns of hard turning are the cost of expensive tool materials and the effect of the process on machinability characteristics. The poor selection of the process parameters may cause excessive tool wear and increased work surface roughness. Hence, there is a need to study the machinability aspects in high-hardened components. In this work, an attempt has been made to analyze the influence of cutting speed, feed rate, depth of cut and machining time on machinability characteristics such as machining force, surface roughness and tool wear using response surface methodology (RSM) based second order mathematical models during turning of AISI 4340 high strength low alloy steel using coated carbide inserts. The experiments were planned as per full factorial design (FFD). From the parametric analysis, it is revealed that, the combination of low feed rate, low depth of cut and low machining time with high cutting speed is beneficial for minimizing the machining force and surface roughness. On the other hand, the interaction plots suggest that employing lower cutting speed with lower feed rate can reduce tool wear. Chip morphology study indicates the formation of various types of chips operating under several cutting conditions. © 2012 Elsevier Ltd.

Suresh R.,Canara Engineering College | Gaitonde V.N.,Alagappa Chettiar College of Engineering And Technology | Samuel G.L.,Indian Institute of Technology Madras | Davim J.P.,University of Aveiro
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture | Year: 2013

The hardened steel materials have great demand for the manufacturing of automotive, aircraft and machine tool components due to their better strength, wear resistance and high thermal stability. The hard machining offers many potential benefits compared to grinding, which remains the standard finishing process for critical hardened surfaces. To enhance the implementation of this technology, questions about the ability of this process to produce surfaces that meet the surface finish and integrity requirements must be answered and it must be justified economically. With the development of harder work materials, the tool material technology is advancing at a faster rate so as to enable machining of these materials by higher material removal rate with reliability of performance. This review article presents an overview of the previous research on machining of hard steel materials. It mainly focuses on the influence of extrinsic factors on machinability of hardened steels, such as variation of cutting forces, chip morphology, tool wear and resulting surface integrity in the machined surface. © 2013 IMechE.

Bhat S.,Canara Engineering College | Nagaraja H.N.,Visvesvaraya Technological University
Proceedings of the 2014 International Conference on Advances in Energy Conversion Technologies - Intelligent Energy Management: Technologies and Challenges, ICAECT 2014 | Year: 2014

In a large number of industrial applications, it is required to convert a fixed dc voltage to a different dc voltage level, with a regulated output. To perform this task, a dc-dc converter is needed. There are three basic converters namely Buck, Boost and Buck-Boost. This paper presents a comprehensive study on the influences of filter elements on buck converter performance. The MOSFET switch is used as a switch and its behavior is analysed using a switching model and this model is used to study the switch performance on the Buck converter. In the proposed method, the filter elements, inductors and capacitors are varied and its effect on the performance of buck converter is studied. In a Buck converter these elements are varied one at a time and its effect on the performance is seen. The buck converter is designed for an input voltage of 30V and output voltage of 12V. This paper also gives better insight into transient state and steady state performances of the Buck converter when the filter elements are varied. The proposed design is better in terms of less ripple content, good regulation, better efficiency and excellent transient properties. © 2014 IEEE.

Suresh R.,Canara Engineering College | Basavarajappa S.,Davangere University | Samuel G.L.,Indian Institute of Technology Madras
Measurement: Journal of the International Measurement Confederation | Year: 2012

Hard turning with multilayer coated carbide tool has several benefits over grinding process such as, reduction of processing costs, increased productivities and improved material properties. The objective was to establish a correlation between cutting parameters such as cutting speed, feed rate and depth of cut with machining force, power, specific cutting force, tool wear and surface roughness on work piece. In the present study, performance of multilayer hard coatings (TiC/TiCN/Al 2O 3) on cemented carbide substrate using chemical vapor deposition (CVD) for machining of hardened AISI 4340 steel was evaluated. An attempt has been made to analyze the effects of process parameters on machinability aspects using Taguchi technique. Response surface plots are generated for the study of interaction effects of cutting conditions on machinability factors. The correlations were established by multiple linear regression models. The linear regression models were validated using confirmation tests. The analysis of the result revealed that, the optimal combination of low feed rate and low depth of cut with high cutting speed is beneficial for reducing machining force. Higher values of feed rates are necessary to minimize the specific cutting force. The machining power and cutting tool wear increases almost linearly with increase in cutting speed and feed rate. The combination of low feed rate and high cutting speed is necessary for minimizing the surface roughness. Abrasion was the principle wear mechanism observed at all the cutting conditions. © 2012 Published by Elsevier Ltd. All rights reserved.

Thirumalaivasan R.,Vellore Institute of Technology | Prabhu N.,Canara Engineering College | Janaki M.,Vellore Institute of Technology | Kothari D.P.,JB Group of Institutions
International Journal of Electrical Power and Energy Systems | Year: 2013

The Generalized Unified Power Flow Controller (GUPFC) is one of the most versatile flexible ac transmission system (FACTS) controllers which controls the active and reactive power flows in multiple transmission lines originating from a substation while controlling the sending end bus voltage. The sending end bus voltage is regulated by control of shunt reactive current while the active and reactive power flows in the transmission line are regulated by series injected voltages. This paper reports the analysis and study of Subsynchronous Resonance (SSR) characteristics of hybrid compensated system with GUPFC. The various operating mode combinations of series and shunt converters are considered to investigate their effect on SSR characteristics. The methods of analysis of SSR with GUPFC is based on the evaluation of damping torque, eigenvalues of the system and transient simulation. The computation of damping torque considers D-Q model of GUPFC to determine the torsional mode stability. The study is performed on a system adapted from IEEE Second Benchmark Model (SBM). The results demonstrate the effectiveness of series real injected voltage in mitigating the SSR. © 2013 Elsevier Ltd. All rights reserved.

Shwetha Nayak B.,Canara Engineering College
IET Conference Publications | Year: 2013

Network security is a large and growing area of concern for every network. The more we invent for the good of humanity, humans try to negate the good factor and hence the fear of viruses and hacking. Research has to move in the direction of preserving and guarding network environments which today are facing an ever increasing number of security threats in the form of Trojan worm attacks and viruses that can damage the Computer systems and communication channel. Firewalls are used as a security check point in a network environment; nevertheless there are still various types of security issues which are on the rise. In order to strengthen the network from illegal access the concept of IDS (Intrusion Detection System) is gaining popularity around the world. The applications of the data mining in the computer security field improves the development of IDS in order to work on these applications it is essential to classify the degree of attacks in IDS and use it through data mining. Despite the use of IDS we cannot be completely certain about its workability and results of IDS use have been uncertain. To plug the loopholes we need to adjust the detection strategy according to the degree of attack activities to ensure error free results.

Thirumalaivasan R.,Vellore Institute of Technology | Janaki M.,Vellore Institute of Technology | Prabhu N.,Canara Engineering College
IEEE Transactions on Power Systems | Year: 2013

Hybrid series compensation using static synchronous series compensator (SSSC) and passive series capacitor can improve the stability of the system, increases the power transfer capability and is useful for the fast control of power flow. This paper analyzes the subsynchronous resonance (SSR) characteristics of the hybrid series compensated power system in detail and proposes a simple method for the extraction of subsynchronous components of line current using filter. The extracted subsynchronous frequency component of line current is used to inject a proportional subsynchronous voltage in series with the transmission line which suppresses subsynchronous current in the transmission network. This novel technique is termed as subsynchronous current suppressor. The design of subsynchronous current suppressor is based on damping torque analysis and using genetic algorithm. A novel graphical representation of series resonance condition when SSSC is incorporated in the system is presented. The detailed study of SSR is carried out based on eigenvalue analysis, transient simulation and damping torque analysis. The results of the case study on a system adapted from IEEE First Benchmark Model demonstrates the effectiveness and robust performance of subsynchronous current suppressor in damping of SSR under various system operating conditions. © 2012 IEEE.

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