Browsing by Author "De Silva, T. S"

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A comparison of fuzzy logic controller and pid controller for differential drive wall-following mobile robot
(IEEE, 2019-12-18) Ratnayake, R. M. N. B; De Silva, T. S; Rodrigo, C. J
This paper presents a comparison between PID controller and Fuzzy rule based controller of a differentially steered wall following mobile robot. Four different maps, generated using Mapper3 software are used to simulate the robot in MobileSim platform. The code was implemented using C++ language in ARIA development package. The robot simulation is performed with Pioneer P3-DX robot. In this study, the data was collected for each cases such as: left wall following and right wall following. In order to validate the results, maximum of 40 runs were conducted for each map and the results were compared with the illustrated methods.
Open Access
An effective & efficient approach to increase fuel efficiency in spark ignition engines
(researchgate.net, 2017-12) Dhananjaya, T; De Silva, T. S; Senaviratne, L
This paper is about an extensive approach to redesign Hydroxy gas generator which is also known as Hydrogen-Hydrogen-Oxygen (HHO) gas generator, that produces Hydroxy gas. This Hydroxy gas can be used to increase the fuel efficiency in spark ignition engines, which are widely used in automobile industry. In a spark ignition engine, high pressure products of combustion expand through a piston in order to generate power. Here the fuel burning process seems to be very primitive. Hence, unburned fuel remains after the burning process. This causes the air pollution which is one of the biggest challenges that researches face in the automobile industry. HHO generator is an approach to increase the fuel efficiency in a combustion engine by reducing the amount of unburned fuel. The proposed approach is based on an ordinary HHO generator. Although people use HHO generators in practice a very little research has been carried out in implementing an efficient system. In this research we mainly focused on finding an efficient way to redesign the configuration of an ordinary HHO generator that is efficient than an ordinary system. Here the generator was tested under several conditions in order to determine a convenient design for an efficient HHO generator. An efficient/optimal system is supposed to produce a large volume of Hydroxy gas using a very little power. Therefore, such a system will be able to increase the power of a spark ignition system while reducing the air pollution.
Open Access
HHO generator–an approach to increase fuel efficiency in spark ignition engines
(European Journal of Advances in Engineering and Technology, 2015) De Silva, T. S; Senevirathne, L; Warnasooriya, T. D
This paper is all about designing an efficient Hydrogen-Hydrogen-Oxygen (HHO) generator, that produces Hydroxy gas which can be used to increase the fuel efficiency in an internal combustion engine. In a combustion engine, high pressure products of combustion expand through a turbine or a piston in order to generate power. In this scenario the high pressure products act as a working fluid. Currently there are three types of combustion engines in practice; Spark ignition engine, Diesel engine and Turbine engine. In these engines the fuel burning process seems to be very primitive. Hence, unburned fuel remains after the burning process. This causes the air pollution which is one of the biggest challenges that researches face in the automobile industry. HHO generator is an efficient approach that used to increase the fuel efficiency in a combustion engine by increasing the energy produced per mole of fuel during the ignition process. As a result the amount of unburned fuel in a combustion engine was reduced. The proposed approach is based on an ordinary HHO generator. Although people use HHO generators in practice a very little research has been carried out in implementing an efficient system. In this research we mainly focused on finding an efficient configuration of an ordinary HHO generator that is efficient than an ordinary system. Here the generator was tested under several conditions in order to determine a convenient design for an efficient HHO generator. An efficient/optimal system is supposed to produce a large volume of Hydroxy gas using a very little power. Therefore, such a system will be able to increase the power of a spark ignition engine while reducing the air pollution.
Open Access
Local Positioning System for Indoor Robot Navigation
(researchgate.net, 2015-11) De Silva, T. S
Local positioning systems for indoor robot navigation are in a developing stage using different technologies and algorithms. Many researchers and engineers have focused in improving the accuracy of the local positioning systems. The main focused era of local positioning systems is to predict the position of a robot using known landmarks or transmitting devices located in the indoor system. Most of the local positioning systems are in the experimental stage and some are developed as marketable products after testing under different conditions. Matter of fact exact positioning of a robot in an indoor environment is a fundamental problem in robot navigation. These local positioning systems are helpful in such environments where global positioning systems are not functional to provide accurate information of the position of the robot. This paper describes a methodology that can be used in indoor navigation to determine the position of a robot. In the system developed ultrasound is used as the communication method. The system designed, consists with several transmitters which can emit ultrasound and a mobile receiver which is capable in receiving the transmitted sound. The ultrasound consists with frequencies above 20 kHz. These frequencies are beyond the sensitivity range of the human ear. Mostly these kind of signals are used by bats to find their path to fly avoiding the obstacles. In the developed system three ultrasound transmitters are used as the landmarks of the positioning system. One transmitter acts as the reference terminal in initiating the determining the process of the positioning system. The accuracy of the system is depend on the number of transmitters have been used. The minimum resolution of the developed system is 5 cm and tested up to 100 cm range in an obstacle free environment.