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In this paper simpler and step by step procedure for the construction of unknown input full order observer is developed based on the concept of generalized matrix inverse. This unknown input observer is simpler in structure, computationally less complex and does not presuppose the observer structure. Condition of existence is derived. The simulation results are included. Moreover, in this paper a...
This paper deals with vector control of grid-connected converter under unbalance grid conditions using single AC side current sensor. DDSRF based decoupling technique is used for decoupling of grid voltage and enhanced DDSRF is used for decoupling of grid current in the revolving d+−q+ and d−−q− frames. In the presented method, the stationary α-axis current is simply proportional to sensed r-phase...
In this paper, a novel approach based on General Relativity Search Algorithm (GRSA) for Automatic Generation Control (AGC) of a two area interconnected thermal-thermal power system is described. In the investigated power system, governor dead-band is considered as a nonlinearity. At first, AGC of the power system is analyzed with Proportional Integral (PI) controller and further Proportional Integral...
Electrical propulsion is gaining popularity in the marine industry, because of its good energy management and better dynamic performance. An azimuth thruster driven by an electric motor is a common configuration found in modern electric propulsion systems. In recent years failures relating to bevel gears and bearings in azimuth thruster drive train failures were reported in the marine industry. The...
Wireless Sensor Networks are used in collection of fields which comprises of disaster management, ecological observing, healthcare, battle arena, biotic, home, and other viable applications. With enormous evolution in the dome of entrenched sensor technology, there are tranquil of number of sensor nodes that are capable of intuiting, stimulating, and transmitting the unperturbed data, has been made...
The focus of this work is to compare the different flux estimators in an induction motor(IM) direct torque control system (DTC) for wide speed operation. The back electromotive force (EMF) has to be integrated to estimate the stator flux linkage. The error in the stator flux linkage is due to the initial condition and DC offset in the acquired feedback signals. The flux estimation techniques, which...
In this paper, we propose a hybrid classification model, which has correlation based filter feature selection algorithm and support vector machine as a classifier. In this method, features are ordered according to their Absolute correlation value with respect to the class attribute. Then top K Features are selected from ordered list of features to form a reduced dataset. The classification accuracy...
As interest towards solar energy is increasing therefore maximum power generation becomes an important issue. With photovoltaic systems power is maximized by using tilt angle resulting in optimum sizing and maximum power. Therefore optimum tilt angle (OTA) for 15 sites of Himachal Pradesh, India are calculated for installation of PV based standalone and hybrid system. The new correlations of annual...
Measured value of minimum air temperature, maximum air temperature, average air temperature and solar radiation between 1 January 2012 to 31 April 2014 for Hamirpur city in Himachal Pradesh, India are used for prediction of daily global solar radiation (DGSR) with artificial neural network (ANN) technique. The prediction of DGSR are made with three combinations of input variables namely: (i) average...
State-space average value modeling of dc-dc converters in continuous and discontinuous modes have been conferred remarkable recognition in the literature. This paper presents different aspects of averaged value modeling of flyback converter operating in discontinuous conduction mode (DCM). Moreover, a second order sliding mode controller is designed and analyzed for flyback converter. The advantages...
Outcome based education (OBE) is the modern teaching buzzword which is widely accepted and practiced in most of the educational institutes across the world. For engineering courses where understanding of technical concept with practical understanding is highly relevant, the modern tool usage as project based learning during the delivery of course is required. This paper presents an innovative approach...
This paper presents an online Condition Monitoring (CM) methodology for inductors in LCL filter integrated with Active Front End Rectifier (AFER). The proposed methodology monitors the winding flux of each phase of grid side and converter side inductors and compares with the winding flux under healthy condition to detect and identify the winding fault. The developed technique uses the Fast Fourier...
This paper presents the development of a cosimulation platform of induction motor direct torque control (DTC) drive. This paper provides advanced modeling and simulation tool for induction motor drive. The proposed simulation platform allows a coupled analysis that links finite element analysis (FEA) with the simplorer for the more realistic simulation, analysis and validation. With the help of finite...
Induction motors are presently used in many electric vehicle applications. As a result, their control methods have received a lot of attention. One of the efficient method of induction motor control is the direct torque control (DTC). In this paper, a design method for direct torque control of induction motor has been developed. A Verilog hardware description language is used to implement the developed...
In this paper, a model reference adaptive system (MRAS) speed estimator for speed sensorless indirect field oriented control (IFOC) of an induction motor drive (IMD) using fuzzy logic controller (FLC) is implemented to replace the conventional constant gain proportional-integral-controller (PIC). Firstly, the MRAS speed sensor for IFOC of an IMD is implemented using PIC. The PIC offers satisfactory...
Human computer interface (HCI) system requires a skin color detection algorithm in it's first step of designing. Skin color detection algorithm faces two major problems one is variable Human skin tone and second one is complex background. Human skin tone variation can be easily seen from person to person within same ethnic group or different ethnic groups. And the background used in real time is usually...
In the development of Human computer interface applications information related to skin color is extensively utilized. Reason being skin is the biggest part of human being. Human skin color shows resemblance with non-skin colored material like wall paint, wood etc. So an efficient human computer interface (HCI) system is required to be designed which can distinguish between them. The default color...
Precise Remaining Useful Life (RUL) prediction of cutting tools is crucial for reliable operation and to reduce the maintenance cost. This paper proposes Artificial Neural Network (ANN) based approach for accurate RUL prediction of high speed milling cutters. Developed ANN model uses time and statistical features, selected through stepwise regression feature subset selection technique, as input. By...
The reliability issues like Negative Bias Temperature Instability and Hot Carrier Injection are major concerns in nanoscale design of MOSFET applications. This necessitates that model with higher accuracy for prediction of these degradations and to calculate the lifetime of the CMOS application circuits. Earlier models available in literature are reported to be accurate but the huge time is consumed...
Segmentation of mathematical equations from document images is already a major research area for improved performance of OCR systems. Though chemical equations are also sharing similar spatial properties as that of non-chemical equations (for example, mathematical equations), efforts to segment those are still to be explored. This paper presents a novel method for segmenting and identifying chemical...
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