Ratnakanth Babu M.J.,Government of Andhra Pradesh |
Satish Kumar K.,Lingayas Institute of Management and Technology |
Dhananjayarao E.N.,Andhra University |
Jai Sankar G.,Andhra University |
And 2 more authors.
International Journal of Earth Sciences and Engineering | Year: 2012
Land use/Land cover mapping serve as a basic inventory of land resources throughout the world. Whether regional or local in scope, remote sensing offers a means of acquiring and presenting land cover data in timely manner. The geographical location of the study area is between 16°30′40″N latitudes and 80°37′10″E longitudes to know the amount of runoff in the study area, SCS-CN method was used. SCS-CN method uses the soil information, rainfall, storm duration, soil texture, type & amount of vegetation cover and conservation practices are considered. The runoff is computed for classified areas, and then land use/land cover pattern of selected mandals was studied. The land use/land cover patterns were visually interpreted and digitized using ERDAS IMAGINE software. In the study it was observed that agricultural area (61.4%) is dominant. The raster data is processed in ERDAS and geo-referenced and then LU/LC map, drainage map, contour map were generated in GIS. After analyzing the runoff obtained using SCS-CN, the suitable cropping for the available water is suggested. © 2012 CAFET-INNOVA TECHNICAL SOCIETY.
Panditta I.K.,National Institute of Technology Srinagar |
Ambardhar R.,National Institute of Technology Srinagar |
Dembi N.J.,Lingayas Institute of Management and Technology
AIAA Journal | Year: 2010
A new methodology for determining redundant reactions of beams is presented in this paper. This methodology is based on the principle of quasi work, which is a powerful pseudoenergy theorem deduced from Tellegen's theorem. It takes topography of a structural system as a variable in addition to the variables involved in conventional energy methods, variational principles, and finite element methods. The concept of topologically similar system lies at the heart of the principle of quasi work. This concept is explored for beams to define topologically similar beams and topologically equivalent beams. The principle of quasi work is validated for beams and subsequently used for determining redundant reactions of indeterminate and continuous beams. Further, a unique concept of reference beam is developed. Equation of deflection curve of this reference beam is used to solve redundant reactions of indeterminate beams. This methodology has an advantage of calculating redundant reactions mostly by simple multiplications without any integrations or differentiations and does not require any prior knowledge of writing bending moment expressions. The method is illustrated through examples. It is possible to develop an interactive graphic computer package for calculating reactions of indeterminate beams. Copyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc.
Vats S.,Lingayas Institute of Management and Technology
Advanced Materials Research | Year: 2012
More than 3 million kilometers of high pressure liquid and gas pipelines are installed all over the world.Usually steel is the safest means to transport large quantities of oil and oil related products and natural gas however, just like any other technical component, pipelines also deteriorate with time, result of which, flaws appear and they grows until the pipeline fails. That is why Pipeline operators worldwide maintain the good health of buried cross-country pipelines with a combination of good quality external coating and cathodic protection. Beside this various other techniques like cleaning and debris removal by scrapper pigging at intervals depending upon the life of pipeline and the products being transported through the same are used. Use of corrosion inhibitors and internal coating is also done to protect the internal surface from corrosion. It is of greatest importance to ensure the safety, efficiency,environmental integrity and regulatory compliance of the worldwide pipeline infrastructure. Achieving this objective entails the need for effective inspection technologies, incorporating the accuracy and reliability required for optimized maintenance strategies. Intelligent pigs are used for inline inspection of buried pipelines to monitor their thorough health,assess the risks associated with their operation,pilferage checking and cracks etc. These IPIGS are capable of detecting metal loss upto 5-10 percent of wall thickness on inner as well as external surfaces of pipeline. IPIGS based on ultrasonic and eddy current sensors are capable of detecting cracks also. On the basis of the wall thickness loss and the intensity of defects, pipeline risk assessment is done and preventive and corrective measures are planned. This paper presents the technical details of instrumented pig with its advantages and disadvantages over conventional methods of pipeline protection and inspection. It also elaborates the concept of multiple technology intelligent pig and scope for future research on intelligent pigging. © (2012) Trans Tech Publications, Switzerland.
Dhayanandh S.,Lingayas Institute of Management and Technology |
Manoharan S.,Karpagam College of Engineering
ARPN Journal of Engineering and Applied Sciences | Year: 2016
The increasing use of nonlinear loads such as adjustable speed drives, electric arc welders and switching power supplies cause's large amounts of harmonic currents injects in to distribution system. LC passive filters are traditionally utilized to compensate the harmonic currents since they are simple and low cost solution. However, they are often large and heavy. In contrast, shunt active power filter purpose is to generate harmonic currents having the same magnitude and opposite phase with the harmonics produced by the nonlinear load and to ensure the supply currents contains only fundamental component. Adopting the advantage of indirect current control schemes i.e., absence of harmonic detector, this paper proposes an advanced control strategy to enhance the APF performance. In the proposed control scheme the supply currents are directly measured and regulated to be sinusoidal by an effective harmonic compensator, which is developed based on a PI and VPI controllers and implemented in the fundamental reference frame. In place of PI and VPI controller a new controller implemented with ANN technique applied as current controller for three phase Shunt Active Power Filter then THD will be further reduced and dynamic response of the system also reduced. © 2006-2016 Asian Research Publishing Network (ARPN). All rights reserved.
Yadav D.,Lingayas Institute of Management and Technology |
Nadir A.K.,Lingayas Institute of Management and Technology |
Kapoor P.,Lingayas Institute of Management and Technology
Journal of the Institution of Engineers (India): Electrical Engineering Division | Year: 2011
Breakdown of transformers prove to be very expensive and inconvenient because it takes a lot of time for their replacement. During breakdown the industry also incurs heavy losses because of stoppage in production line. A system for monitoring the temperature of transformers is required. Existing sensors cannot be used for monitoring the temperature of transformers because they are sensitive to electrical signals and can cause sparking which can trigger fire since there is oil in transformers cooling coils. Optical fibres are electrically inert so this system will prove to be ideal for this application. Results of investigations carried out by simulating a configuration of optical fibre temperature sensor for transformers based on micro bending using MATLAB7.5 as a simulation tool to evaluate the effectiveness of this sensor have been communicated through this paper.