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Alloy AZ91D is a leading magnesium alloy used for structural and transport applications. It contains aluminium and zinc as main alloying elements. This work involves a metal matrix composite (MMC) been fabricated using Mg AZ91D alloy and TiC as reinforcement. Wear resistance were evaluated under dry sliding condition at different loads. Wear mechanisms of the composite are basically abrasion-adhesion...
It's the generation of tiny satellites which basically needs all its components to be miniature. The product proposed here is one such component, a micro-strip patch antenna array operating at 2.2GHz and 2.45GHz S-band frequencies. This real-time project work deals with a rectangular patch antenna operating at S-band frequencies which is mainly focused to be applicable for the NIUSAT, which is a nano...
Induction Motors are usually designed for the highest efficiency around their rated load. In most applications, the motor rating matches the worst-case load, but the motor frequently runs below rated conditions. As the load decreases the motor efficiency decreases and a larger percentage of the input power is in the form of losses. The motor efficiency can be improved by operating the motor at optimum...
The uses of embedded systems are virtually limitless, because every day new products are introduced to the market that utilizes embedded systems in novel ways. In recent years, hardware such as microprocessors, microcontrollers, and FPGA chips have become much cheaper. So when implementing a new form of control, it's wiser to just buy the generic chip and write your own custom software for it. Producing...
This paper discusses the evolution of types of protection schemes for the grid integrated wind farms. When wind farms are connected to the grid then the parameters like transmitted power and relay end voltage fluctuate continuously. Special adaptive schemes are required for the protection in the presence of such varying parameters. Various researchers have tried various techniques to improve protective...
New complex and Low Power systems are being implemented using advanced Electronic Design Automation (EDA) tools. Low power designs are not only used in small size applications like mobile phones, tablets and handheld devices but also in high-performance computing applications. As the complexity increases day by day, the dissipation of power has emerged as one of the very important design constraints...
In general, Coconuts are dehusked manually using either a machete or a spike. These methods require skilled labor and are tiring to use. Attempts made so far in the development of dehusking tools have been only partially successful and not effective in replacing manual methods. Considering the drawbacks of manual dehusking methods, and existing automated dehusker, power operated coconut dehusking...
Petroleum resources are dwindling day by day and the atmospheric pollution created by gasoline vehicles force the researchers to develop new, eco-friendly, highly efficient vehicles. In this paper, the design of a new multimode parallel hybrid electric vehicle is considered. The design technique uses fuzzy logic for implementing various controlling actions. The vehicle is fitted with electric motors,...
In this paper a new optimization technique has been implemented to solve the economic dispatch (ED) problem. A Modified Artificial Bee Colony (MABC) algorithm is applied. A more judicious ED problem formulation considering valve point effect, ramp rate limits and prohibited operating zones utilized. The performance of the method is verified by implementation on three test systems. The overall cost...
Renewable energy technologies offers clean, abundant energy gathered from self-renewing resources such as the sun, wind etc. As the power demand increases, power failure also increases. So, renewable energy sources can be used to provide constant loads. A new DC-DC converter topology for hybrid wind/photovoltaic energy system is proposed. Hybridizing solar and wind power sources provide a realistic...
Coastal erosion is a major problem facing the coastlines of the world, which needs to be addressed with priority. Coastal properties and roads are threatened by erosion, particularly during the monsoon. Long lasting coastal protection is needed to solve the beach erosion problems. Breakwaters are effective in reducing the cross shore sediment transport and in wave height reduction in its lee. In the...
This Paper describes the implementation of the enterprise mobile solution to manage multiple diseases. This solution is cost effective & efficient to use for patient. From architecture perspective, solution described here uses M-V-C pattern. This solution targets various stake holders involved in to the medical eco-systems like Patient, HCP, and non HCP. Main focus of this paper is to showcase...
Reuse of domestic greywater (GW) is emerging as an important approach to the management and conservation of water resources, particularly in rural and developing areas where small-scale decentralized treatments are suited. Vertical flow constructed wetlands have been increasingly used as a sustainable technology for the ecological treatment of wastewater. In this paper, an attempt has been made to...
A novel method to improve the performance of Low Density Parity Check (LDPC) Codes using Soft Input Decryption is presented in this paper. A channel coding technique that provides performance near to Shannon's limit is LDPC code. To achieve optimum decoding, Sum-product decoding is used for LDPC Codes. The Soft Input Decryption method is based on the combination of cryptography and channel coding...
The present investigation proposes an efficient low power encoding scheme intended for a 5GS/s 5 bit flash analog to digital converter. The designing of a thermometer code to binary code is one of the challenging issues in the design of a high speed low power flash ADC. An encoder circuit in this paper translates the thermometer code into the intermediate gray code to reduce the effects of bubble...
Wireless mesh networks (WMNs) have been attracting significant attention due to their promising technology. The WMN technology is becoming a major avenue for the fourth generation of wireless mobility. The wireless backbone is tightly integrated with the Internet by some selected nodes called as Gateways. Common single gateway architecture is inadequate for clubbing this high speed network with the...
One of the most important technologies for electric vehicles is the drive control technology which does not require a position or speed sensor. In a sensorless vector controlled induction machine, the speed must be estimated from the system measurements. Model Reference Adaptive System (MRAS) based techniques are one of the best methods to estimate the rotor speed due to its performances and straight...
Energy crisis is considered to be one of the greatest problems faced by mankind. During the last decade the prices of fossil fuels like oil, coal has risen sharply and there is a continuous depletion of these scarce resources. Hence there is an urgent need to develop and exploit other alternative sources of energy. In this study, biomethanation of vegetable waste with water hyacinth and cow dung was...
A method for controlling the generation of ice for Cold Thermal Energy Storage (CTES) is presented in this paper. A load shifting controller is developed to find the optimum trajectory for CTES in a dynamic environment. The variation in ice building efficiency due to the nonlinear relationship between changing ambient air temperature and ice charge level is accommodated by employing dynamic programming...
In this paper realization of a digital excitation system for synchronous generator is discussed. Such a real-time task is implemented using Real-Time Application Interface on Linux platform which is an open source effort. In this work a static excitation system is considered which involved the development of additional hardware circuits such as fully-controlled thyristor bridge-rectifier, the associated...
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