UNMANNED SURFACE VEHICLE (USV) FOR COASTAL SURVEILLANCE

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The purpose of this paper is to design and fabricate an unmanned surface vehicle (USV) for the coastal surveillance for the maritime of India. It aims to monitor territorial waters on a round-the-clock basis and allows the intelligence to take appropriate action to prevent terrorism, illegal smuggling and human trafficking as the continuous use of an aircraft for surveillance is prohibitively expensive along the Indian coastline which is a massive stretch measuring 7,517km.In this paper an Air Cushioned Vehicle (ACV) popularly known as a Hovercraft is chosen for surveillance as it has the ability to traverse any surface compared to other coastguard vessels thereby earning the title of amphibious boats. Its ability to access 75% of littoral allows them to come on shore during emergencies unlike conventional coastguards that have only 5% littoral access and cannot enter shallow water. Another major advantage of using this surface vehicle is it is easy to operate and noiseless compared to conventional vessels that generate wakes at high speeds unlike the ACV. The Hovercraft are fitted with a variety of sensors for intelligent monitoring and surveillance.
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POLARIZATION RECONFIGURABLE ANTENNA

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The paper proposes  polarization reconfigurable antenna that can change its polarization from Left Hand Circular Polarization (LHCP) to Right Hand Circular Polarization (RHCP) by using patch rotation technique. This antenna resonates at 5.65 GHz with a return loss of -17.86dB,-18.61, gain of 8.4dB and 5.7dB, axial ratio of 1.76dB and 2.25dB and VSWR of 1.29 and 1.26 for LHCP antenna and RHCP antenna respectively. The antenna can be used for RFID application. The advancement in wireless communication requires the usage of reconfigurable antennas. The reconfigurable antenna can change its any one of its parameter (frequency, Polarization and Radiation Pattern) based on the appliation. The reconfigurable antenna is caterigorized into three types, based on the parameter it can change.

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A SURVEY OF ENERGY-EFFICIENT COMMUNICATION PROTOCOLS IN WSN

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Wireless sensor networks are harshly restricted by storage capacity, energy and computing power. Wireless Sensor Networks have acquired a lot of attention by research community, manufacturer as well as actual users for monitoring remote trades and how to gather data in different environment. The wireless sensor nodes are especially battery powered devices having life can be extended for some times while long lasting and reliable for maintaining consumption of energy and network lifetime while designs applications and protocols. So it is essential to design effective and energy efficient protocol in order to enhance the network lifetime. In this paper we present the study of different energy efficient communication protocols of Wireless Sensor Networks (WSNs).Then some of the communication protocols which are widely used in WSNs to improve network performance are also discussed advantages and disadvantages of each protocols.

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CHARACTERIZATION OF PHYSICAL LAYER IMPAIRMENTS IMPACT ON OPTICAL FIBER TRANSMISSION SYSTEMS

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In this paper the characterization of the impact of physical layer impairments on quality of transmission of optical fiber transmission systems had been demonstrated analytically and verified numerically with simulation results. Linear and nonlinear impairments in optical links accurately characterized with analytical modeling techniques but on the counterpart it is cost efficient to characterize the impact of these impairments using empirical techniques which provides real time information of these impairments to digital signal processing algorithms used in their compensation to ensure high throughput of the optical transmission systems.

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BEHAVIOUR OF OFDM SYSTEM AND REDUCTION OF ITS PAPR BY USING SELECTIVE MAPPING IN MATLAB

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The OFDM technique divides the total bandwidth into many narrow sub-channels and sends data in parallel. It has various advantages, such as high spectral efficiency, immunity to impulse interference and, frequency selective fading without having powerful channel equalizer. But one of the major drawbacks of the OFDM system is high PAPR. OFDM signal consists of lot of independent modulated subcarriers, which created the problem of PAPR. It is impossible to send this high peak amplitude signals to the transmitter without reducing peaks. So we have to reduce high peak amplitude of the signals before transmitting. Communication is one in all the numerous features of existence.

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SHORT DURATION VOLTAGE DISTURBANCE IDENTIFICATION USING RMS ALGORITHM IN DISTRIBUTION SYSTEM

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Delivering good quality of power is the main agenda for distribution system to the loads. But maintain power quality is not so easy due to the load variations in the system. Sag and swell are the main factors that affect power quality. In this paper, multiple sag conditions and swell conditions were tested by producing the condition in different phases of the system. A simple algorithm called RMS algorithm was developed and tested for the said conditions. Sag and swell were generated on single phase and multiple phases for testing the algorithm. The algorithm and the results were obtained using Matlab

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COMPUTATIONAL ENGINEERING OF FINITE ELEMENT MODELLING FOR AUTOMOTIVE APPLICATION USING ABAQUS

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Modals with complicated geometry, complex loads and boundary condition are difficult to analyse and evaluate in the terms of strain, stress, displacement and reaction forces by using theoretical methods. A given modal can be analysed by using Finite Element Method easily with the help of computer software ABAQUS CAE and can get approximate solutions. This report is about modelling two dimensional and three dimensional analyses with the ABAQUS CAE for plane stress, plane strain, shell, and beam and 3d solid modal elements. The report will show hand sketch, procedure to simulate and solve the problems, submit and monitor analysis jobs and view results using ABAQUS CAE software for different elements and compare with theoretical calculation. The result also gives the information of stresses and strains generated in the Plate and its deformation for different boundary conditions and loads. In addition, this report will analyse the data, compare results and validate theoretical results, this will help us to understand the software, its capabilities and accuracy.

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