Ram S.D.G.,Bharath Niketan Engineering College |
Ravi G.,Alagappa University |
Mahalingam T.,Alagappa University |
Kulandainathan M.A.,Control Electrochemical Research Institute
Applied Physics A: Materials Science and Processing | Year: 2011
Tuning the morphology, size and aspect ratio of free standing ZnO nanostructured arrays by a simple hydrothermal method is reported. Pre-coated ZnO seed layers of two different thicknesses (≈350 nm or 550 nm) were used as substrates to grow ZnO nanostructures for the study. Various parameters such as chemical ambience, pH of the solution, strength of the Zn 2+ atoms and thickness of seed bed are varied to analyze their effects on the resultant ZnO nanostructures. Vertically oriented hexagonal nanorods, multi-angular nanorods, hexagonal diskette and popcorn-like nanostructures are obtained by altering the experimental parameters. All the produced nanostructures were analysed by X-ray powder diffraction analysis and found to be grown in the (002) orientation of wurtzite ZnO. The texture co-efficient of ZnO layer was improved by combining a thick seed layer with higher cationic strength. Surface morphological studies reveal various nanostructures such as nanorods, diskettes and popcorn-like structures based on various preparation conditions. The optical property of the closest packed nanorods array was recorded by UV-VIS spectrometry, and the band gap value simulated from the results reflect the near characteristic band gap of ZnO. The surface roughness profile taken from the Atomic Force Microscopy reveals a roughness of less than 320 nm. © 2011 Springer-Verlag.
Senthil Kumar K.,Bharath Niketan Engineering College |
Ramkumar D.,Bharath Niketan Engineering College
Wireless Personal Communications | Year: 2015
Shortest path (SP) routing problem for static network has been addressed well in the recent past using different intelligent optimization techniques such as artificial neural network, ant colony optimization, particle swarm optimization, genetic algorithms (GA) etc. However, advancements in the wireless communication result in more and more wireless mobile networks such as mobile ad hoc network, wireless mesh network, etc. for which static path routing algorithms will not work well due to the dynamic nature of the mobile networks whose environmental conditions change over time. In this paper, we present a new method to address the SP routing problem for dynamic wireless sensor networks using well known optimization technique called GA. In this method, different paths which are formed randomly by the nodes between source and destination are modeled as chromosomes in the GA. Then, these chromosomes are undergone various genetic process such as selection, crossover and mutation to get new chromosomes. Every time the topology changes, network parameters such as sent packets, received packets, transmission time and dropped packets are estimated for each path and the optimized route is selected using fuzzy based fitness function applied to each chromosomes. © 2015 Springer Science+Business Media New York
Shenbagabalakrishnan B.,Bharath Niketan Engineering College |
Gayathri V.,Thiagarajar College of Engineering
International Journal of ChemTech Research | Year: 2014
Enhancing hydrogen storage through Nanostructures is one of the thrust area of research today. Among several materials studied, this allotropic form of carbon, namely Carbon Nanotubes (CNTs) proves to be one of the promising system owing to its unique properties like high surface area, porous and high stability to a list few important one. The possibility of hydrogen storage both in the inner and outer surfaces are well investigated by lot of theoretical as well as experimental works. The role of defects, doping and Structural variations of the different Nanomaterial are also analysed and found that some of these strongly affects the storage capacity. But still the DOE target could not be achieved that makes this issue an interesting topic of study. Here, the dependence of the hydrogen binding energy on the bond length and angles of the Nanotubes are analysed. Different types of Nanotubes like metallic and semiconductor with varying structures are considered for this study (1.57 Ȧ length of the C - C bond gives the binding energy value of 0.061eV). Apart from CNTs other contending materials such as Boron nitride are also considered. The adsorption binding energy values (as a function of different orientations of molecule and at different sites of Nanostructures) are compared and the results will be discussed in detail for hydrogen storage applications.
Raj K.P.,Bharath Niketan Engineering College |
Sekaren V.R.,P.A. College
2011 International Conference on Electrical and Control Engineering, ICECE 2011 - Proceedings | Year: 2011
The unified power flow controller is the most versatile and complex power electronic equipment that has emerged as the indispensable equipment for the control and optimization of power flow in electrical power transmission system. In this thesis the control of real and reactive power flow through a transmission line with the use of UPFC at the sending end is investigated. Computer simulation using MATLAB Simulink is done and the behavior of the UPFC is studied. In the UPFC based control of transmission line parameter control systems, it is observed that whenever the SSSC sources some real power into the transmission line it is manifested as a voltage drop across the DC link. The fall of the DC link voltage is an indication of real power demand from the receiving end. PI Controllers are used in this work in the control of DC voltage, AC voltage and power transfer. © 2011 IEEE.
Saravanan M.,Alagappa Chettiar College of Engineering And Technology |
Arulkumar P.V.,Bharath Niketan Engineering College
International Journal of Innovation and Sustainable Development | Year: 2013
This paper compares two familiar optimisation algorithms named Genetic Algorithm (GA) and Simulated Annealing Algorithm (SAA) to find out the best algorithm which is suitable for solving the cellular layout design problems. The objective is to minimise the movement of parts within the cell by appropriate placement of machines. In determining the physical location of work centres, some relative importance factors are considered. The priorities are given for the product, which has more volume and hazardous move and also to minimise back tracking move. Copyright © 2013 Inderscience Enterprises Ltd.
Jeevanantham A.K.,Vellore Institute of Technology |
Kannan S.M.,Bharath Niketan Engineering College
ARPN Journal of Engineering and Applied Sciences | Year: 2013
Selective assembly is an economic method to obtain perfect precision assemblies by using the components manufactured with wide tolerance specifications. The mating component's tolerances are divided into equal number of groups. The manufactured components are segregated according to these groups and the components from the corresponding groups are assembled interchangeably in the conventional method. The required clearance can be achieved at this assembly method that is tighter than those achieved at the normal fabrication method with lowest total cost. Still there are more variations in the clearance range. In this paper, a new optimization method is proposed to find the best combination of the selective groups to minimize assembly variation for the complex assemblies. A case example is analyzed for piston, cylinder and piston ring assembly. Fuzzy evolutionary programming (EP) method is used to obtain the best combination of the selective groups to control the assembly variation. Selective assembly is successfully applied for a piston and cylinder assembly using fuzzy EP method to achieve minimum clearance variation without sacrificing the benefit of wider tolerance in manufacturing. © 2006-2013 Asian Research Publishing Network (ARPN).
Rajkumar K.,Bharath Niketan Engineering College |
Applied Mechanics and Materials | Year: 2013
In this paper, an attempt to overcome the problem of brittleness of concrete, by adding polypropylene fibers to the concrete is made. The performance of the polypropylene fiber reinforced concrete will be investigated experimentall under two point middle third of monotonic load for various types of polypropylene fibers and FRP Wrapping. © (2013) Trans Tech Publications, Switzerland.
Kasinathan P.,Bharath Niketan Engineering College |
Vairamani R.,P.A. College |
Sundramoorthy S.,Mepco Schlenk Engineering College, Sivakasi
IET Power Electronics | Year: 2013
Reactive power compensation is a main problem in the control of electric power system. Reactive power from the source increases the transmission losses and reduces the power transmission ability of the transmission lines. In addition, reactive power must not be transmitted throughout the transmission line to a longer distance. Consequently, flexible ac transmission systems devices such as static compensator unified power-flow controller (UPFC) and static volt-ampere compensator are used to ease these harms. UPFC is the mainly adaptable and composite power electronic equipment that has emerged as the vital equipment for the control and optimisation of power flow in electrical power transmission system. In this study, a d-q model-based UPFC is developed with proportional-integral (PI) and PID controller. The above controllers are simulated using MATLAB and their performance is analysed. Outcome of the analysis shows the superiority of PID control over the PI control method. Also this study presents comparative evaluation (both controllers) of dynamic response when initial and final load disturbances. © The Institution of Engineering and Technology 2013.
Pounraj K.,Bharath Niketan Engineering College |
Selvaperumal S.,Syed Ammal Engineering College
International Journal of Applied Engineering Research | Year: 2014
Reactive power compensation is a main predicament in the control of electric power system. Reactive power from the source increases the transmission losses and decreases the power transmission aptitude of the transmission lines. In adding together, reactive power must not be transmitted throughout the transmission line to a longer distance. Accordingly Flexible AC Transmission Systems (FACTS) devices such as static compensator (STATCOM) unified power flow controller (UPFC) and static volt-ampere compensator (SVC) are worn to effortlessness these problems. The unified power flow controller is the primarily pliable and composite power electronic apparatus that has emerged as the very important paraphernalia for the control and optimization of power flow in electrical power transmission system. In this manuscript a DQ model based UPFC is developed with PI, PID, Fuzzy and ANN controllers. The above controllers are simulated using MATLAB and their performance is analyzed. Outcome of the Analysis shows the dominance of ANN control over the conventional control method. Also this script presents relative estimation (Conventional and ANN Controllers) of dynamic performance when initial and final load strife. © Research India Publications.
Saravanan M.,Sri Krishna College of Engineering And Technology |
Arulkumar P.V.,Bharath Niketan Engineering College
International Journal of Advanced Manufacturing Technology | Year: 2015
The placement of production equipments plays a major role in designing a layout in cellular manufacturing. The better placement increases the productivity. This article introduces a new algorithm to design and optimize a fixed area cellular layout problem by using an artificial bee colony (ABC) technique which is based on the intelligent foraging behavior of a honeybee. The objective of this article is to determine the physical arrangement of work centers by minimizing the total traveling distance of the product. Volume of the product and distance between the work centers are the important factors that affect layout design. Some relative importance factors like priority of products, hazardous moves, and back-tracking moves are considered in this article. Layout moment ratio helps to compare the different proposed layouts. The higher layout moment ratio is the more desirable layout. Also this article compares the results of ABC technique with genetic algorithm (GA) and simulated annealing (SA) algorithm based on the total moment value, layout moment ratio, number of iterations, computation time, and back-tracking movements. Finally, it concluded that ABC is a better technique to solve fixed area cellular layout problems than the mentioned algorithms with high dimensionality. © 2015, Springer-Verlag London.