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Jyothi B.,Koneru Lakshmaiah College of Engineering | Rao M.V.G.,PVP Siddhartha Institute of Technology | Karthikeyan S.P.,Indian Central Power Research Institute
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2017

The production of multiphase system was a challenging task in earlier days, multiphase means more than three phases and very much popular now a days due to eminent features compared to conventional three-phase counter parts. In order to obtain the multiphase machine, it requires same phase input with respect to the no. of phases at the output. This paper mainly focuses on five phases because even after failure of one phase, the performance does not degrade much. Therefore, to attain a five phase supply a multiphase transformer connection is proposed. The induction motor is (five phase) fed by the output of the proposed transformer connection scheme. The performance of the motor is analyzed by an experimental investigation through experiment set up and MATLABR, the simulation results are presented in the form of computer traces and high traded performance of the machine are discussed, under balanced as well as unbalanced supply conditions. © 2016 IEEE.


Ravindrababu J.,Pvp Siddhartha Institute Of Technology | Krishna Rao E.V.,Koneru Lakshmaiah College of Engineering | Raja Rao Y.,Rashtreeya Vidyalaya College of Engineering
Wireless Personal Communications | Year: 2014

Multi-stage parallel interference cancellation (PIC) technique gives good performance compared to successive interference cancellation (SIC) method, but biased decision statistic and complexity problems are raised due to imperfect estimation of multiple access interference (MAI) as number of stages increases. partial parallel interference cancellation (PPIC) technique is proposed to cancel the interference partially stage by stage to overcome biased problem. The complexity reduction for PIC detection is based on the convergence nature of interference cancellation which is called the difference PIC (D-PIC) detection technique. In this paper we combine (PPIC and DPIC) these two techniques and propose a multi-stage multi-user (PD-PIC) detector for performance improvement and complexity reduction compared to conventional PIC detector. The performance is degraded as the number of users increases in each technique. © 2014, Springer Science+Business Media New York.


Prasanna Kumar T.J.,PVP Siddhartha Institute of Technology | Narendar S.,Indian Defence Research And Development Laboratory | Gopalakrishnan S.,Indian Institute of Science
Composite Structures | Year: 2013

This paper presents the thermal vibration analysis of single-layer graphene sheet embedded in polymer elastic medium, using the plate theory and nonlocal continuum mechanics for small scale effects. The graphene is modeled based on continuum plate theory and axial stress caused by the thermal effects is also considered. Nonlocal governing equation of motion for this graphene sheet system is derived from the principle of virtual displacements. The closed form solution for thermal-vibration frequencies of a simply supported rectangular nanoplate has been obtained by using the Navier's method of solution. Numerical results obtained by the present theory are compared with available solutions in the literature and the molecular dynamics results. The influences of the small scale coefficient, the room or low temperature, the high temperature, the half wave number and the aspect ratio of nanoplate on the natural frequencies are considered and discussed in detail. The thermal vibration analysis of single- and double-layer graphene sheets are considered for the analysis. The mode shapes of the respective graphene system are also captured in this work. The present analysis results can be used for the design of the next generation of nanodevices that make use of the thermal vibration properties of the graphene. © 2013 Elsevier Ltd.


Koganti S.P.,PVP Siddhartha Institute of Technology | Chappidi H.R.,Koneru Lakshmaiah College of Engineering
Electronic Journal of Geotechnical Engineering | Year: 2016

Gradual development of human requirements and economic impose strong pressure on sources base and environment. The situation is rather alarming in Capital Region, Andhra Pradesh, a coastal state with low per capita land and resource availability. The quality of structures depends up on the replacement of alternate material with natural sand may be partially or completely. The availability of natural sand in capital city like Amaravathi is undoubtedly difficult. It is also discussed on crushing process followed in all the quarries. Quarry dust which is a waste product from aggregate crushers could replace sand. Construction of pavements in expansive soils creates a lot of problems for civil engineers, stabilization with industrial waste like quarry dust gives results. The study discuss about the zone classification of quarry dust compared to codal provision. The Cu and Cc values are analysed from sieve analysis and presented. The present study aimed to identify the physical properties, geotechnical properties and comparative studies of river sand and quarry dust which can be used as alternative to the sand as fine aggregates. © 2016 ejge.


Koganti S.P.,PVP Siddhartha Institute of Technology | Chappidi H.R.,Koneru Lakshmaiah College of Engineering
Electronic Journal of Geotechnical Engineering | Year: 2016

The construction of the new capital city of Andhra Pradesh may begin on the banks of river Krishna around the historic Amaravathi town and proceed on either side of the river, eventually encircling Vijayawada. The majority of the land situated on the banks of Krishna River is black cotton soil. The samples collected from the study area were tested the engineering characteristics by stabilizing with 5% to 20% replacement of quarry dust. Most of the quarries are situated in and around the capital city. So as the replacement of waste material like quarry dust can be considered for the stabilization. The results of the compaction parameters and CBR values of the soil are improved substantially with the addition of the Stone dust for both black cotton soil and Murrum. It is also found that the swelling of the black cotton soil is almost controlled and for the murrum soil gives good results. The result showed that the CBR value increased, the optimum moisture content has been reduced and the maximum dry density has been increased. © 2016 ejge.


Jyothi B.,Koneru Lakshmaiah College of Engineering | Venu Gopala Rao M.,PVP Siddhartha Institute of Technology
ARPN Journal of Engineering and Applied Sciences | Year: 2016

Earlier the production of multiphase system was a challenging task, but with the advance in the ratings of power semiconductor switches it turned to be effortless through inverters. The main cause for developing multi-phase system is that, it has some dominant features over the conventional three phase system. In order to obtain a five phase supply a specially connected transformer is proposed instead of an inverter. The induction motor (five phase) feed by the five phase output of the specially connected transformer. The performance of the motor is analyzed under balanced as well as unbalanced supply conditions and also under stator fault conditions. © 2006-2016 Asian Research Publishing Network (ARPN).


Ravindrababu J.,Pvp Siddhartha Institute Of Technology | Rao E.V.K.,Andhra Loyola Institute of Engineering and Technology
WSEAS Transactions on Communications | Year: 2013

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users' data in presence of MAI. Linear Multi-user Detectors and conventional Matched Filter (MF) are simulated using gold, PN and even kasami sequences as spreading codes in DS-CDMA system. In this paper odd kasami sequence is proposed. For this, odd kasami sequence of length L=2m which inclusive of initial bit, The Bit Error Rate (BER) performance of MMSE Detector provides better than Decorrelating detector and conventional Matched filter. Comparative Study shows that the proposed odd kasami sequence is better performed than gold, PN and even kasami sequences in linear Multi-user Detectors and conventional Matched Filter (MF).


Ravindrababu J.,Pvp Siddhartha Institute Of Technology | Krishna Rao E.V.,Andhra Loyola Institute of Engineering and Technology
WSEAS Transactions on Communications | Year: 2013

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users' data in presence of MAI. In Multi stage Partial parallel interference cancellation (MP-PIC) method complexity is more than multi stage conventional PIC (MC-PIC), but performance is better than MC-PIC. In This paper we proposed multi stage subtractive PIC (MS-PIC). In this method the complexity is less than MP-PIC and performance is slightly less than MP-PIC. Now we proposed one more method that is the combination of partial and subtracting parallel interference cancellation (PS-PIC) in multi stage. This method gives to achieve performance improvement and complexity reduction compared to conventional multistage PIC detector.


Shyam Prakash K.,PVP Siddhartha Institute of Technology | Rao C.H.,Koneru Lakshmaiah College of Engineering
Advances in Civil Engineering | Year: 2016

The concept of replacement of natural fine aggregate by quarry dust which is highlighted in the study could boost the consumption of quarry dust generated from quarries. By replacement of quarry dust, the requirement of land fill area can be reduced and can also solve the problem of natural sand scarcity. The availability of sand at low cost as a fine aggregate in concrete is not suitable and that is the reason to search for an alternative material. Quarry dust satisfies the reason behind the alternative material as a substitute for sand at very low cost. It even causes burden to dump the crusher dust at one place which causes environmental pollution. From the results of experimental investigations conducted, it is concluded that the quarry dust can be used as a replacement for fine aggregate. It is found that 40% replacement of fine aggregate by quarry dust gives maximum result in strength than normal concrete and then decreases from 50%. The compressive strength is quantified for varying percentage and grades of concrete by replacement of sand with quarry dust. © 2016 K. Shyam Prakash and Ch. Hanumantha Rao.


Ravindrababu J.,Pvp Siddhartha Institute Of Technology | Krishna Rao E.V.,Andhra Loyola Institute of Engineering and Technology
WSEAS Transactions on Communications | Year: 2012

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users' data in presence of MAI. Linear Multi-user Detectors and conventional Matched Filter (MF) are simulated using PN and even kasami sequences as spreading codes in DS-CDMA system. In this paper odd kasami sequence is proposed. For this, odd kasami sequence of length L=2m which inclusive of initial bit, The Bit Error Rate (BER) performance of MMSE Detector provides better than Decorrelating detector and conventional Matched filter. Comparative Study shows that the proposed odd kasami sequence is better performed than PN and even kasami sequences in linear Multi-user Detectors and conventional Matched Filter (MF).

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