This paper presents the doubly fed induction generator (DFIG)-based wind turbine (WT) system with a back-to-back converter (B2BC) and nine-switch converter (NSC) as well as their control schemes. A new slip speed estimator-based control method is also proposed to control RSC of the DFIG-WT system. The system responses are obtained using two different converter topologies, namely (i) B2BC and (ii) NSC-based

In this paper, a compact frequency and polarization agile patch antenna is presented. The antenna comprises a square patch with truncated corners along with a triangular slot etched at the center of the patch. Pin diodes are used to bridge the gap between the truncated corners and center triangular region with a radiating square patch. By appropriately biasing the pin diodes the antenna achieves frequency

The modified single-ended primary inductor converter (SEPIC) reported in the literature has limitations namely, low static gain and high input current ripples. This resulted in poor efficiency with high switching losses and switching stress. Hence, in order to overcome the above-said limitations, this paper proposes a high static gain SEPIC converter with reduced input current ripple. The proposed

Alternatives to the conventional wet ECG (Electrocardiogram) electrodes are highly in demand in the medical field, primarily when the prolongated recording of ECG signals is required. The lifestyle possessed by people nowadays encourages heart diseases to hover around us, and it becomes pertinent for managing one’s health, which is not inhibited by parameters such as time-span, distance, and space

In this paper, a new zero current switching flyback-forward DC-DC converter is proposed. In the proposed converter to provide soft switching condition, an auxiliary circuit without any additional switch is used, which increases the efficiency. In this converter the switch is gated with PWM signal; therefore, the design and implementation of the control circuit is simple. The other advantages of the

As of now, SRAM-based FPGAs are mainly preferred in the non-safety applications of NPPs. If the susceptibility to radiation effects of SRAM-FPGAs improves further, then the reliability of the applications can be improved. This experimental study investigates the radiation absorbed dose effects in SRAM-based FPGAs. The irradiation experiments have been conducted by keeping the device in both the power-on

Fault detection has been an active research field and increasingly important for the safety of technical processes and systems. A variety of fault detection methods have been developed that are generally designed for a specific system; therefore, they target limited types of fault. An efficient approach that could monitor the degradation conditions and be less problem-specific is necessary for improved

In this paper, two robust controllers have been designed to automatically regulate the synchronous generator voltage for an extensive domain of the system parameters in a single-machine infinite bus (SMIB) framework. These two controllers are based on the fuzzy set, and the type-2 fuzzy logic plus the proportional–integral (PI) operation, respectively. The Fuzzy and Type-2 fuzzy logic decisions are

Active suspension system has become an integral part of a passenger vehicle as ride comfort is now an essential parameter in the performance of a vehicle. The active suspension system claims complete control over the driver body motion, thus improving the overall ride quality. This work intends to reduce the entire body acceleration of the driver, thereby improving the ride comfort by designing and

The time-delay in a networked control system is difficult to predict accurately. In order to improve prediction performance, a time-delay prediction method is proposed. Firstly, the approximation components with low-frequency and approximation components with a high frequency of time-delay sequence are obtained through the decomposition and reconstruction of Db3 (Daubechies 3) wavelet transform. Secondly

This paper presents a space vector modulated single-phase to three-phase (1 × 3) Indirect Matrix Converter (IMC). The IMC is comprised of a front-end side rectifier followed by a voltage source inverter (VSI). DC voltage appears at the intermediate of the rectifier and VSI, this virtual DC-link does not have any energy storage element (battery or capacitor), which reduces total power to weight ratio

This study investigates the performance of Multi-Resolution Optimize Relative Step Size Random Search (MR-ORSSRS) based method in maximizing the total power production of wind farms under circumstances of varying wind directions, turbine failures and non-static wind conditions. With the Horns Rev Wind Farm layout as the basis, the proposed method is compared against the benchmarked Multi-Resolution

In this paper, a comprehensive survey on the key components of a rectenna system, including antenna configurations, rectifier configurations, impedance matching networks, and RF filter, is outlined. Due to increased applications, the rectenna has occupied a unique place in the RF and microwave engineering. For the last few decades, the research on the rectenna design is focused-on to improve the power

Multi Verse Optimization (MVO) technique is a newly developed population based algorithm established on the perception of white holes and black holes in a multi-verse for finding out all possibilities of search spaces. This algorithm is applied to tune the proposed Fractional Order Proportional Derivative Proportional Integral (PPDPI) controller of a multi area power system having hydro, thermal, and

Research in facial expression recognition and emotion detection has undergone many developments recently. Human express different feelings via facial expressions at different circumstances. Perceiving such type of communication helps us in building a computational human cognition model. There are seven basic emotions: anger, disgust, fear, happy, sad, surprise and neutral. Researchers have stuck to

In this paper, we introduce a four-port self-isolated double-sided Ultra Wide Band (UWB) MIMO antenna with WLN notch characteristics for short-range wireless high-definition (HD) video transmission applications. The double side orthogonal arrangement of the radiators is adopted to mitigate the mutual coupling between the four radiators without using an isolation structure. The proposed MIMO antenna

Voltage source inverters are the most preferred in a variety of medium and high power applications. The control of inverter output voltage gives desirable outputs in drives and many applications. Pulse width modulation (PWM) techniques strongly influence the inverter output. Space vector pulse width modulation (SVPWM) technique is one among the prominent techniques that are used for inverter switching

Resilient Packet Ring (RPR) is defined by IEEE 802.17 to achieve fairness and high bandwidth utilization. Fairness is important in RPR where fairness algorithm has two types of operation, aggressive and conservative. The current algorithm is simple; however, it becomes unstable, if the traffic is unbalanced which cause resources loss. In this paper, the control theory is applied by designing a PID

This paper proposes a dynamic maximum power point tracking (MPPT) controller for a permanent magnet synchronous generator (PMSG)-based variable speed autonomous wind power conversion system (WPCS) with an energy storage system (ESS). The dynamic controller extracts the maximum power from the WPCS under variable speed conditions using a cascade neural network (CNN)-based MPPT algorithm. Also, the efficient

The conventional method for finding the location of turn-to-turn stator fault on the stator winding of the induction motor is spectral analysis. Using the harmonics method, the current spectrum can show the location of the fault. In this paper, it is shown that the chaos phenomenon could occur when fault arises on the motor. The spectrum of chaotic system has a wide range of harmonics. Consequently

Stability analysis of switched DC-DC converters is necessary because instability enhances current ripple and causes converter operation at unwanted voltage/current level. In the present study, stability analysis of switched converters using Lie Algebra has been performed considering the switched linear model of DC-DC converters. The switched linear system is asymptotically stable if the Lie bracket

In the IoT network, each node should have the self-configuration capability as well as a unique identifier such as IPv6. The unique IPv6 identity of nodes is primarily maintained by employing the stateless auto-configuration method and Duplicate Address Detection (DAD) protocol. In the existing DAD solutions, when a new node creates a target IPv6 address, it broadcasts a full or partial target address

This review article summarizes the previously published studies on horizontal axis wind turbine gearbox system and their advantages. From the available literature, the gearbox technology is classified into three major types such as Planetary Gearbox (PG), Continuously Variable Transmission (CVT), and Magnetic Gearbox (MG). Other gearbox types are installed and successfully running under prototype mode

The paper presents a robust design of Artificial Neural Network Classifier used for the classification of faults occurring on Extra High Voltage Transmission lines with multiple series compensation. The feature selection and model parameters play a vital role in providing better accuracy as well as stability of Classifier in recognition of fault patterns. The paper describes the use of Particle Swarm

In this paper, a new approach for the design of an optimal fractional-order (FO) proportional integral derivative (PID) controller is proposed. The proposed approach is based on modified Ziegler Nichols technique of tuning an FO PID controller and Big Bang Big Crunch algorithm which is a soft computing technique. The proposed approach is applied to a solar tracker system, a numerical example of an

This paper proposes a novel adaptive disturbance observer-based fast terminal global sliding mode tracking control for uncertain time-delay nonlinear systems in the presence of parameter uncertainties, multiple delayed state perturbations and external disturbances. The suggested fast terminal sliding mode disturbance observer guarantees the disturbance approximation error converges to zero in finite

The present epoch of technology suffers owing to the shortage of novel methodologies in obtaining a better quality compressed video. Diverse exploration has aroused in espousing Group of pictures aiming at Intra, Bi-directional & Predicted frame identification for performing compression. The conventional GoP practices fixed frame pattern irrespective of the movement by the camera. This paper deals

The vibrations in the vehicles are one of the discomforts to the passengers. The reduction of vibrations is a challenging task in the suspension system of the vehicle. The researchers are proposing different types of control strategies in the active suspension system to reduce the vibration and increase the ride comfort of the passengers. In this paper, Fractional Order Terminal Sliding Mode Controller

Modified design of triangular-shaped microstrip antenna is proposed for circular polarized response which yields an axial ratio bandwidth of 68 MHz (∼5%) in the L-band. Furthermore, its electromagnetically coupled stacked design is presented, which yields enhanced impedance and axial ratio bandwidth of more than 1100 (∼70%) and 90 MHz (>7%), respectively. A single and stacked antenna offers a broadside

In this paper, a hierarchical virtual inertia control technique for a bidirectional DC–DC converter is proposed to enhance inertia of an isolated DC microgrid through the DC bus voltage regulation. The transient and steady-state performance of the DC microgrid, in terms of the DC bus voltage regulation, is enhanced with the implementation of the proposed hierarchical virtual inertia control. The DC

Design and measurement results of the signal converter with three-phase and quadrature outputs are presented in this paper. Input to the converter is a sinusoidal reference signal and the outputs are the quadrature and symmetrical three-phase sinusoidal signals of the same frequency as the reference. The output amplitudes are proportional to the reference amplitude. The quadrature output is generated

A modified reduction order is proposed for the LTI boiler system from the pole clustering method to reduce the higher-order system which yields an exact system model also to minimize the complexity involved in traditional methods. This approach is used to compute the reduced-order system from the combined method of cluster and Routh-Padé approximation techniques that are to achieve the effective formulated

In recent years, processing and analysing large graphs has become a major need in many research areas. Distributed graph processing programming models and frameworks arised as a natural solution to process linked data of large volumes, such as data originating from social media. These solutions are distributed by design and help developers to perform operations on the graph, sometimes reaching almost

Copious and accessible sun radiation creates an attractive system for converting solar energy into electrical energy. The solar power plants are installed in remote locations and hence needs monitoring and controlling system from remotely. A computerized remote solar plant monitoring system with an enormous range of solar Photovoltaic (PV) exploitation needs well-developed systems with Web-based interfaces

This study aims to develop a new relaying scheme for the complete protection of transmission line based on only voltage data. Fault detection and classification is obtained from the fundamental component of the voltage signal collected from one end of the line. Magnitudes of positive sequence component of voltage signals from both ends of the line have been considered for fault location. As only magnitude

Breast cancer is a major concern among women that causes high risk of death. Early diagnosis of such cancer becomes challenging due to alterations in the color of the histopathological breast images. This study uses a publicly available dataset of breast cancer histopathology images. This paper introduces a dual stage normalization approach, to address the color variation problem of biopsy specimen

In this paper, an anemometric type flow meter has been designed and developed using a transistor as a flow sensor. The heat is dissipated from the surface of the p–n diode created by short circuiting the emitter and base terminal of the transistor CL100B causing the drop in the temperature with respect to the fluid velocity and it is utilized to measure the flow rate of the fluid across the pipeline

Schizophrenia is an incurable neurological disorder that changes human being’s perception and behavior due to genetic and environmental factors. The objective of this study is to detect Schizophrenia using electroencephalogram signals as biomarker. In this work, two time-domain features, namely Higuchi Fractal Dimension and correlation from a pair of electrodes have been extracted. In addition, two

In this novel experiment, the performance of solar PV cell is tested under different pressure (partial vacuum condition), which is a step towards its performance improvement. The small-scale hardware is designed and developed for this setup, which contains mainly the transparent air-tight container, pressure gauge, temperature sensor, irradiation sensor, and compressor unit. In this experiment, under

Electroencephalogram (EEG) can track the brain waves which contain the neural activity of the brain. EEG signals help to understand the physiological and functional details and activities of the brain. In the era of Artificial Intelligence (AI), machine learning algorithms were useful in brain disorder detection and classification. Recently, a rapid increase in using Deep Learning (DL) methods in various

The artifacts such as ocular, muscle and certain electrical disturbances contaminate the Electroencephalogram (EEG). Wavelet enhanced independent component analysis (wICA) with static segmentation preserves little information of both spectral and coherent characteristics of neural activity. However, the considerable amount of valuable information can be preserved with novel automatic dynamic size segmentation

This paper presents a novel low-power, electronically tunable, temperature-insensitive and a high multiplication factor grounded capacitance multiplier, based on third-generation current conveyor transconductance amplifier (CCIIITA). The proposed circuit consists of a single CCIIITA block and a grounded capacitor making it suitable from integrated circuit realization viewpoint. Also, the proposed design

(2020). Scanning the Issue. IETE Journal of Research: Vol. 66, No. 2, pp. 125-126.

The demand for designing antennas having multiband operations along with very compact dimensions is increased recently. Compact and low-profile antennas are required which can be used with multiple communication standards in a portable device. This work presents the smallest form factor multiband antenna, which is very compact, low profile, and covers triple-band for wireless local area network (WLAN)

This paper presents a nonlinear feedback control of the induction motor drive system fed by a matrix converter controlled by a direct space vector strategy. The nonlinear feedback control is an approach privileged, which allows achieving a decoupled control while ensuring a perfect linearization regardless of the profiles of the reference trajectories imposed. In this context, a sliding mode controller

This paper describes the challenges in the design of board-level Ku-band power amplifier (PA) using the hybrid-MIC technology. The selection of laminates, connectors, cables and RF components, such as DC feed and DC block, is examined from the perspective of Ku-band PA designers. Other key challenges, such as die mounting and wire bonding, are also discussed. Die mounting and wire bonding are critical

This paper presents modification of standard Kalman filter (KF) based on augmented input estimation (AIE) and deadbeat dissipative FIR filtering (DDFF) for maneuvering target tracking. Although KF is a well-known tool in estimation and tracking but it has two weaknesses, disability in maneuvering motions and lack of robustness against temporary model uncertainty. For the first problem, the AIE is proposed

For providing security to the people, who survive in country borders, mine and chemical industries, wearable devices with sensors can be used to follow their activities through sensors. The main element of that security device is the antenna. Based on the construction, utility, and performance, miniaturized MicroStrip Patch (MSP) antennas are mainly preferred. In this paper, the compact MSP antenna

In this paper, a meander monopole antenna array based electromagnetic band gap (EBG) structure is proposed for MIMO applications. For this, two monopoles of a meander structure are printed on an FR4 substrate of 1.6 mm thickness and fed with 50Ω microstrip lines. The ground plane is defected with EBG Hilbert shaped inclusions of the 3rd order on the substrate back profile within a limited array size

With the proliferation of the internet of things (IoT) and device-to-device (D2D) communications enabled by the boom of mobile computing technology, secure high-speed communication has now become indispensable in our daily life. This is especially true when potentially private data are being continually sensed by and communicated among mobile devices as they exist in a world of interconnected inanimate

In passive underwater target tracking, the observer uses bearings-only measurements generated by radiation of the target. The measurements are always corrupted with noise, which creates an uncertainty zone around the target position. Unscented Kalman filter (UKF) is proved to be efficient nonlinear estimator to estimate the target motion parameters. It is of interest to know in many practical situations

Dry-type transformers are one of the most significant devices used in the conversion, transmission and management process of the electricity. In practice, the electrical energy conversion entails energy losses such as heat, electromechanical and electromagnetic losses during the transformation. Hence, primary importance is the efficiency of energy conversion for a device that converts AC voltage from

Classification of faults in transformers with high accuracy is fundamental to ensuring good power quality with least interruptions. Our current work develops an intelligent genetic algorithm (GA)-tuned fuzzy classifier for transformer fault identification. The proposed classifier is able to segregate all fault types using dissolved gas analysis (DGA) samples from real power transformers of HPSEB (India)

Recognition of Indian Sign Language (ISL) could bridge the gap between deaf-mute people and society. Hand recognition is a key requirement for ISL recognition system. In this paper, the hand region is segmented from the depth image using the Microsoft Kinect Sensor in the cluttered environment. The depth image obtained is then used to implement supervised machine learning by extracting and training

A robust low power Electrocardiogram (ECG) pre-processor is proposed to extract the useful information from biomedical signal. The methodology uses window-based efficient design that consumes less power and resources of Field Programmable Gate Array (FPGA). The comparison has been done among different window functions and filter architectures (Symmetric and Anti-symmetric). The entire hardware implementation

In this research work, a design of different Microwave Components for the proposed beam steering-switching array is presented. In order to achieve beam steering, two different schemes namely Beam Steering Array using Hybrid Directional Coupler and Beam Steering Array using Switched Line Phase Shifters are proposed for improvement of performance parameters like Directivity, Side Lobe Level, Beam-width

The dual stator-asynchronous machine is one type of emerging electric multiport machine. In this study, we build and simulate a dual stator-winding induction machine, including magnetic saturation with a squirrel-cage rotor. The mathematical models of a dual stator-asynchronous machine with stator mutual leakage inductance, formulated in phase coordinate system and generally transformed vector form

We address the problem of pedestrian tracking in videos of crowded scene which are captured by first-person viewpoint. The constant motion of camera and pedestrian makes this task challenging. The prime challenges are natural head motion of wearer and target loss and reappearance in a later frame, due to frequent changes in field of view. We propose that the use of first-person vision specific optical

The classical printed monopole antenna exhibits wideband operation with low gain and an omnidirectional radiation pattern. In order to boost the gain of the antenna at two frequency bands, a novel dual-band zero-index metamaterial (ZIM) based on both electric and magnetic resonance is developed. The printed monopole is also backed by a metallic ground plane for unidirectional radiation pattern towards

Direction of arrival (DOA) estimation from sparse signal representation has gained much attention in recent years. In this, the spatial signal is reconstructed by using a Compressive sensing (CS) framework. CS is a new paradigm by which the signal acquisition and reconstruction are carried out at sub-Nyquist rates. The limitation of the Nyquist sampling theorem is overcome by sparse sampling and reconstruction