Journal of Science & Technology (JST)
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Solar Based Air Compressor For Car/Bike
Get PDFWith the increased urge for the vehicles in the day to day life for today’s generation has led to have a continuous review over the status and working condition of the vehicles. Basically the inflation of the tire and its wear condition. One of the presently used methods is, using the compressors running on the electricity. This manual or electric inflation causes following difficulties.
Heavy force is required manually to push the piston along with the bearing in the head stock bore. Regular increase in the electric fares.
Unreachable to the remote areas, where electricity is still a dream. Not safe for the user on a monetary basis.
This project is to design and fabricate to minimize manual work as well as to use renewable source of energy by using a solar panel and to overcome the above difficulties. Designing and Fabrication of solar based air compressor has the following merits,
Environmental friendly.
More economical, as solar energy is abundantly available. Continuous monitoring of air pressure on LCD.
Easy to maintain.
This process started from the literature survey. Some of the papers reviewed were “Dynamically self inflating tire system”. Accordingly a PIC microcontroller is used in this project. Micro controller has the input modules like pressure sensor, control buttons and output modules are LCD display, compressor switching driver and buzzer to give alarm in case of high pressure
 
Open Source Solution for Mobile GIS and Location Intelligence
Get PDFMobile computing technology brings the opportunity to reach more Internet users and to deliver information directly to their gadgets. This opportunity opens for tourism world in which a mobile application (shortened to be “app”) can be built by developers, distributed it through application market and the users can download and install the application to their gadgets. The application provides contents related to latest tourism information, favorite attraction points of interest, or offers from some service providers. However, not all areas in Vijayawada have their own app for promoting local tourism. In this research, a mobile tourism application is designed and built for Vijayawada area, the area that is in Andhra Pradesh Province of India. The application has functionalities that are proposed based on taxonomy of tourism mobile application. The application implements Bhuvan Map Application Program Interface (API) to provide location-based service for users. Moreover, the data used for the mobile application is fetched from server using web service and local SQLite database.
Simulation and Controlling of Wind Energy System using ANN Controller
Get PDFThis paper presents a comparative analysis of three control algorithms for a wind turbine generator using a variable speed permanent magnet synchronous generator (PMSG). The design methodologies of the conventional PI based controller, the Taylor series expansion linear approximation based (TSLA-based) controller and the feedback linearization based (FL-based) nonlinear controller are provided. The objective is to keep the wind turbine operating at its optimum rotor speed (MPPT control), while insuring the power transfer from the turbine to the generator, regardless of the wind speed. The controller gains of the nonlinear controller are determined via Linear Quadratic Optimal Control (LQOC) approach. The results show a better control performance for the nonlinear controller. This performance is characterized by fast and smooth transient responses as well as a zero steady state error and reference tracking quality
An High Step-up Interleaved DC-DC Boost Converter fed with PV
Get PDFThe high-voltage step-up dc–dc converters are required as an interface between the available low voltage sources and the output loads, which are operated at much higher voltages. Examples of such applications are as follows. Different distributed energy storage components such as batteries, fuel cells, and ultra capacitors are used in the power trains of hybrid electric vehicles (HEV), electric vehicles (EV), and fuel cell vehicles (FCV). Telecom and the computer industry utilize the standard batteries, with low voltage levels, as back-up power source .The automotive headlamps, using the high-intensity discharge lamp ballasts
Synchronous Reference Frame Control Based Shunt Active Filter for Power Quality improvement
Get PDFPower Quality means maintaining purely sinusoidal current wave form in phase with a purely sinusoidal voltage wave form throughout in a power system. Due to intensive use of power converters and other non linear loads in industries, an increasing deterioration of the power system voltage and current waveforms has been observed. The most important cause for degrading power quality are harmonic distortion and low power factor. Conventionally, Passive filters have been used as a solution to solve harmonic current problems, but they are not capable of mitigating the low power factor problems. So an improved method of Active Power Filter (APF) used to eliminate the disturbances in current. This paper examines the control of Shunt Active Power Filter (SAPF) with Synchronous Reference Frame (SRF) detection method. Here a twelve pulse diode bridge rectifier will be the non linear load and the switching frequency is set to 10 kHz. Simulation analyses are done using Matlab/Simulink software
An Article on Nonlinear Waves In Plasmas
Get PDFoai:oai.jst.org.in:article/3A Plasma is a partially or fully ionized gas, where ionization and recombination are balanced to keep the ionized gas to be charge-neutral as a whole. If the charged neutrality is broken, a large electricfieldmaybelocallycreatedtodriveplasmaunstable.Inthissense,charge neutrality (quasi-charge neutrality) is an essential ingredient of plasmas. Plasma, being a collection of charged particles, respond strongly and collectively to electromagnetic fields through long-range Coulomb interaction
The psychological origins of perceived usefulness and ease-of-use
Get PDFThe technology acceptance model has identified the role of the perceived usefulness and perceived ease-of-use constructs in the information technology adoption process. Whereas past research has been valuable in explaining how such beliefs lead to system use, it has not explored how and why these beliefs develop. To extend the theory of technology acceptance, this paper offers an explanation for the psychological origins of usefulness and ease-of-use. Based on social presence theory, social influence theory, and Triandis' modifications to the theory of reasoned action, causal relationships between the proposed antecedents and perceived usefulness and perceived ease-of-use are examined. To test the theory, data were gathered from 100 users of an E-mail system and tested using LISREL. Findings indicate that system use is affected by perceptions of the medium's usefulness which are, in turn, affected by perceptions of the ease-of-useof the medium, the degree of social influence exerted by supervisors, and perceptions of the social presence of the medium. Accessibility of the medium influences perceptions of the ease-of-use of the medium. Surprisingly, facilitating conditions such as the availability of training and support for the use of information technology had no impact on perceptions of ease-of-use or usefulness of E-mail. Ⓒ 1999 Elsevier Science B.V. All rights reserved