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Sridevi T.,Jawaharlal Nehru Technological University | Reddy K.R.,G Narayanamma Institute Of Technology And Science | Syamala N.L.J.,Annamacharya institute of Technology and science
Proceedings of 2013 International Conference on Power, Energy and Control, ICPEC 2013 | Year: 2013

This paper presents, analysis of magnetizing inrush current for different voltage angles and harmonic analysis of that inrush current using different FFT windowing techniques. Time domain simulations were used to solve the inrush phenomenon. Square, Welch, Hanning and Parzen windows were used to truncate the obtained inrush current harmonic spectrum for investigation and with parzen windowing the harmonic magnitude is getting reduced due to its reduced side lobes. Inrush current harmonic spectrum obtained by using FFT algorithm in turn discrete fourier transform. Out of different solvers to solve state equation, ode23t solver is used. For an unloaded single phase transformer, inrush current in time domain and harmonic content of inrush current were presented. The results are helpful to estimate harmonics effects in the transformer inrush currents. The results establish a guide line for harmonic elimination due to inrush current and offer an important reference for system design. © 2013 IEEE. Source


Rajeswari V.,G Narayanamma Institute Of Technology And Science | Suresh L.P.,Noorul Islam University
Advances in Intelligent Systems and Computing | Year: 2016

The automatic flight control system of an aircraft is very complicated in nature with lot of logics and operational constraints. The study of the detailed automatic flight control and thrust control involves complicated logics for the control functions with closed loop control systems which can be realized in the software. The work is focused on the redesign of automatic flight control system using robust control methods in the MATLAB/Simulink environment. This paper aims at a complete study, analysis, design, and performance monitoring of new generation autopilot system using linear quadratic regulator (LQR) and sliding mode control (SMC) methods for the control of pitch angle of aircraft. A comparison of the results of simulation of the above gives an optimal performance of the autopilot system. © Springer India 2016. Source


Prasada Reddy G.P.,G Narayanamma Institute Of Technology And Science | Venugopal Reddy V.,Jawaharlal Nehru Technological University Anantapur
International Journal of Six Sigma and Competitive Advantage | Year: 2010

Nowadays most of the organisations are showing keen interest in using Six Sigma approach to improve their operations performance. Motorola coined the concept of Six Sigma and General Electric popularised it. This case study was conducted at bearing manufacturing facility located at Hyderabad. One of the important steps in bearing manufacturing is inner ring and outer ringp rocessing to tight tolerances. Improvement in the rejection rate of bearing rings was taken up as Six Sigma project. One of the basic aims of Six Sigma is to reduce variation by statistical thinking. Various statistical tools and techniques were employed in this study to improve the operations. Rejection rate of bearing rings has been reduced from 2.7% to 0.65% and sigma level of process increased from 4.04 to 4.44. Copyright © 2010 Inderscience Enterprises Ltd. Source


Katragadda R.,G Narayanamma Institute Of Technology And Science
2nd International Conference on Electronics and Communication Systems, ICECS 2015 | Year: 2015

Apart from static power loss, leakage power loss is considerably increasing with scaling. This paper analyses techniques for power reduction to be integrated to the 14 T full adder circuit to achieve low power reliable full adder circuits. However, to perform an arithmetic operation, a device can use up very low power by functioning at very low frequency but it may spend a very long time to finish the operation. Therefore, we measure the power dissipation and evaluate the performance of the system by calculating the Power-Delay Product (PDP), which is the product of average power consumption and delay. Power delay product at various supply voltages for different feature sizes has been considered for reliable results. © 2015 IEEE. Source


Rajeswari V.,G Narayanamma Institute Of Technology And Science | Padma Suresh L.,Noorul Islam University
Lecture Notes in Electrical Engineering | Year: 2015

The development of automatic control systems has played an important role in the growth of civil and military aviation. Modern aircraft include a variety of automatic control systems that aid the flight crew in navigation, flight management and augmenting the stability characteristics of the airplane. In this paper, autopilots were designed to control the lateral and longitudinal axis of the aircraft using modern controllers. The effectiveness of the controller were studied and verified using MATLAB and the simulation results are presented in time domain. © Springer India 2015. Source

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