VNIT Nagpur


VNIT Nagpur

Time filter
Source Type

Deshmukh N.,VNIT Nagpur | Bedi A.S.,VNIT Nagpur | Patne N.R.,VNIT Nagpur
1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016 | Year: 2016

This paper describes the effect of Unified Power Flow Controller (UPFC) on distance protection performance used in transmission line. The effect of shunt compensating part of UPFC (STATCOM) and UPFC as a complete device are analyzed individually. A method for calculation of apparent line impedance observed by the relay for line employing UPFC is then investigated. The results obtained from simulation investigate the performance behavior of protective distance relay for solid line to ground fault for transmission system incorporating UPFC. © 2016 IEEE.

Wath M.G.,MSEDCL Amravati | Raut P.,VNIT Nagpur | Ballal M.S.,VNIT Nagpur
1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016 | Year: 2016

Accuracy of metering system depends on accuracy of current transformer, potential transformer and energy meter. This Paper deals with error compensation in measurement current transformers. Due to hysteresis characteristics of current transformer primary current cannot be replicated accurately into secondary current. Hysteresis characteristics of CT cause an exciting current which is main source of error. In industrial environment load current contains considerable amount of DC offset current and harmonics. Accuracy of CT is dependent upon residual flux in the core and DC offset. In this software compensation scheme instantaneous values of secondary current are sensed with the current sensor. From this sensed secondary current instantaneous flux is calculated which after inserting flux-exciting current loop gives calculated exciting current. Calculated Exciting current is added to the secondary current which gives more accurate secondary current. Effect of DC offset in the load current is neglected in this scheme but harmonics are considered. A more detailed study of DC offset is in progress in this compensation scheme. © 2016 IEEE.

Jain R.V.,VNIT Nagpur | Aware M.V.,VNIT Nagpur | Junghare A.S.,VNIT Nagpur
1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016 | Year: 2016

Design of Fractional Order PID controller (FOPID) for speed regulation of DC motor is presented in this paper. In comparison with conventional PID, FOPID is more flexible and trustworthy to control higher order systems. The FOPID exhibits the Iso-damping property to enhance the robustness of closed loop response of the system against gain variations. According to parameters adjustment problems of FOPID controller, particle swarm optimization (PSO) algorithm is adopted to optimize FOPID controller parameters. Peak overshoot, rise time and settling time are considered as important factors to minimize using PSO technique. Simulation results give validation of the proposed work and provide effectiveness of FOPID controller in terms of robustness and control effect as compared to PID controller. © 2016 IEEE.

Sutar R.G.,University of Mumbai | Kothari A.G.,V.N.I.T. Nagpur | Keskar A.G.,V.N.I.T. Nagpur
Proceedings - International Conference on Communication Systems and Network Technologies, CSNT 2012 | Year: 2012

Electrocardiogram (ECG) is one of the commonly used tools to diagnose cardiac patients. Analysis of the ECG is extremely useful in the development of an intelligent diagnostic system. This paper illustrates an approach to analyze ECG and extract its features, useful for designing intelligent medical diagnostic system, using low-cost-access-cum-computing-device (LCAD). Significant features are extracted using LCAD. It deals with noise elimination, accurate detection of QRS complex and extraction of both time domain as well as frequency domain features from the ECG. MIT-BIH database was used to carry out experimental analysis and verification of algorithm. Tablet PC AAKASH is used as LCAD. © 2012 IEEE.

Sutar R.G.,University of Mumbai | Kothari A.G.,V.N.I.T. Nagpur
Proceedings - 2012 International Conference on Communication, Information and Computing Technology, ICCICT 2012 | Year: 2012

Electrocardiogram (ECG) is a popular non invasive test which records the electrical activity of the heart. Cardiac hypertrophy is an adaptive morphological response of the heart to the work overload and is an important risk factor for myocardial infarction, congestive heart failure and sudden death. P wave and T wave changes along-with rise in QRS complex are some of the indications of Hypertrophy. To design intelligent diagnostic system automatic detection of cardiac hypertrophy is an important landmark. This paper illustrates the algorithm to detect cardiac hypertrophy by analyzing ECG signal. MIT-BIH database and MATLAB software has been used for carrying out experimental analysis. © 2012 IEEE.

Sapate S.G.,V.N.I.T Nagpur | Selokar A.,V.N.I.T Nagpur | Garg N.,Diffusion Engineers Ltd
Materials and Design | Year: 2010

Wear by slurry abrasion is a potential problem in engineering components subjected to particulate flow. The life of the components under slurry abrasive wear situations is primarily decided by operating conditions and the materials properties. Martensitic steels are widely used for abrasion resistant applications. The present work reports slurry abrasion response of hardfacing martensitic steel under a wide range of experimental conditions. The response data is generated using systematic and simultaneous variation of test parameters. The experiments were performed using silica sand slurry with different slurry concentration, particle size, sliding distance and load. The results of the investigation suggest that slurry concentration had relatively stronger effect than normal load. The wear volume loss exhibited an increasing trend with increasing severity of test parameters. An empirical equation is proposed to describe the interactive effect of the test parameters, abrasive particle properties and material property. SEM (Scanning Electron Microscope) studies revealed different morphology of the worn surfaces which was attributed to mild to severe slurry abrasion test conditions. © 2010 Elsevier Ltd.

Naveen C.,VNIT Nagpur | Satpute V.R.,VNIT Nagpur
International Conference on Microelectronics, Computing and Communication, MicroCom 2016 | Year: 2016

With the advancement of wireless communication and popularity of internet, security of transmitted data has become a major area of concern and have attracted many researchers. To prevent unauthorized access, it is important to encrypt 1D either 2D (image) data before transmission over open wireless network. A5/1 ciphering algorithm is one of the highly secure encryption algorithm, widely used in GSM standard over wireless network to provide security for the voice data. In order to achieve high security and efficient utilization of existing technology and available resources, the same algorithm can also be used for image and video encryption over wireless channel. In this paper, Enhanced A5/1 cipher based image encryption technique with image bit plane separation is proposed to enhance the security of image data transmitted over wireless network. In this method gray scale image is separated into eight different biplanes and each separated 2Dbit plane data is converted into 1D data stream. Each data stream is XORed with a key stream generated by stream cipher whose length is equal to the resolution of the image i.e., rows â-columns. Enhanced A5/1 stream cipher with improved clock controlling unit and highly nonlinear combining functions is initialized using a 64 bit secret key to generated key stream. For encryption, eight different key streams are used for an image. The proposed method shows high encryption quality, improved differential analysis values, lossless encryption and decryption and fast computations with respect to the standard AES algorithm used as a benchmark. © 2016 IEEE.

Kurhekar M.,VNIT Nagpur | Deshpande U.,VNIT Nagpur
Advances in Bioinformatics | Year: 2016

Modeling of stem cells not only describes but also predicts how a stem cell's environment can control its fate. The first stem cell populations discovered were hematopoietic stem cells (HSCs). In this paper, we present a deterministic model of bone marrow (that hosts HSCs) that is consistent with several of the qualitative biological observations. This model incorporates stem cell death (apoptosis) after a certain number of cell divisions and also demonstrates that a single HSC can potentially populate the entire bone marrow. It also demonstrates that there is a production of sufficient number of differentiated cells (RBCs, WBCs, etc.). We prove that our model of bone marrow is biologically consistent and it overcomes the biological feasibility limitations of previously reported models. The major contribution of our model is the flexibility it allows in choosing model parameters which permits several different simulations to be carried out in silico without affecting the homeostatic properties of the model. We have also performed agent-based simulation of the model of bone marrow system proposed in this paper. We have also included parameter details and the results obtained from the simulation. The program of the agent-based simulation of the proposed model is made available on a publicly accessible website. © 2016 Manish Kurhekar and Umesh Deshpande.

Naveen Ch.,VNIT Nagpur | Satpute V.R.,VNIT Nagpur | Keskar A.G.,VNIT Nagpur
Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics | Year: 2015

This papers deals with improved image compression technique for images having low dynamic range. It is a well known fact that the dynamic range of the images having low intensity variations is less. So by considering this fundamental characteristic into account we can go for image compression at higher ratio with small modifications to the existing algorithms. To achieve the higher compression ratio, block-wise Embedded Zero Wavelet (EZW) is applied on the images by forcing all the blocks in the image to take the same number of dominant and sub-ordinate passes. The number of passes applied on each block of the image will be equal to the lowest number of passes taken by one of the blocks in image. This downside the number of passes applied on the image which reduces the number of bits used for encoding the image which successively increase the compression ratio. The proposed algorithm is analyzed with respect to the normal block-wise EZW by mathematical parameters and visual quality. The mathematical parameters chosen for comparison are Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity (SSIM) index. © 2015 IEEE.

Jain R.V.,VNIT Nagpur | Aware M.V.,VNIT Nagpur | Junghare A.S.,VNIT Nagpur
2016 IEEE 1st International Conference on Control, Measurement and Instrumentation, CMI 2016 | Year: 2016

The main aim of this paper is to design PID control PWM module using field programmable gate array (FPGA) technology. FPGA based realization offers high speed, complex functionality, consume less power, and provides parallel processing. In this paper, we have implemented PID control PWM module on programmable logic design software Quartus II and verified on DE0 Nano Board (Cyclone IV FPGA family of company Altera). Signal Tap II analyzer and RTL viewer are used for analyzing and debugging the design. For Proper timing constraint and clock arrangement, Time Quest analyzer is used. The simulation and hardware results shows that implementation with FPGA has some advantages such as flexible design, high reliability and high speed. © 2016 IEEE.

Loading VNIT Nagpur collaborators
Loading VNIT Nagpur collaborators