Electrical Engineering Conference

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Browsing Electrical Engineering Conference by Author "Abeygunawardana, R"

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    Condition monitoring system for outdoor insulators
    (Institute of Electrical and Electronics Engineers, Inc., 2018-09) Karunarathna, IMAM; Karunathilaka, KLT; Wanasinghe, WMHM; Sampath, GKL; Lucas, JR; Samarasinghe, R; Samarasinghe, R; Abeygunawardana, R
    High Voltage insulators are vital components in transmission and distribution systems in a power network. Most of the insulators are used in open air applications where they are subjected to different environmental conditions. Exposure to these different weather conditions and contaminations determine their performance as insulators. Condition monitoring of power line insulators is an important requirement for asset management and engineers in a power network in order to maintain a healthy power system. There are several techniques that have been introduced to fulfill this requirement. One of the techniques of measuring surface leakage current is introduced here. In this paper, rainy weather conditions are simulated in an artificial rain making chamber and the performance of insulators are examined at different contamination levels. This paper highlights the concepts of measuring surface leakage current for insulators under contaminated conditions. Results show that the surface leakage current is closely related to the insulator condition.
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    Enhancing conceptual spatial map by amalgamating spatial and virtual cognitive maps for domestic service robots
    (Institute of Electrical and Electronics Engineers, Inc., 2018-09) Bandara, HMRT; Basnayake, BMSS; Jayasekara, AGBP; Chandima, DP; Samarasinghe, R; Abeygunawardana, R
    Assitive robot technology is rapidly increasing in the modern era. Robot companions become more human-like over the time with the advancement of technology. Personal assitive robot applications are escalated to a vast extend featuring to medical robots, supportive robots for disabled or elderly people as companions. It is essential to possess the capabilities in relevance to navigation in an unknown environment within the assistive robot. In order to posses such competencies the robot should be able to create spatial cognitive maps and virtual maps. With aid of those constructed maps and the actual spatial map obtained by the sensory inputs such as laser scanner, robot should be able to identify the objects without perceiving any visual information. Therefore this paper proposes a method to use the spatial cognitive map to create virtual visualization of previously unknown environment based on spatial data conveyed through interactive conversation with the user and link that information with the actual spatial map obtained from the laser scanner to identify the position of objects in the domestic environment.The Conceptual map creator(CMC) and Virtual Spatial Map Link Creating (VISMALC) module have been introduced in order to combine cognitive virtual maps with the actual spatial map to identify objects without using any visual information. Capabilities of the robot have been demonstrated and validated from the experimental results.