Browsing by Author "Rupasinghe, RADK"

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    item: Conference-Full-text
    A Portable Tool for Deaf and Hearing Impaired People
    Rupasinghe, RADK; Ailapperuma, DCR; De Silva, PMBNE; Siriwardana, AKG; Sudantha, BH
    A portable system for deaf and hearing impaired people has been developed based on the IEEE 1451 sensor standards and other related technologies to minimize their communication difficulties with the ordinary society. The system is comprised of two main modules. One of the modules is performing gesture recognition by capturing Sinhala sign language symbols from a deaf or hearing impaired person using a specially developed smart glove which is embedded with a 3-D accelerometer, a digital gyroscope and flex sensors complying with the IEEE Smart Sensor Standards. The smart glove is capable of capturing finger movements and hand movements. Arduino Mega controller system, containing Atmel ATmega2560 AVR microcontroller, was used to implement the Smart Transducer Interface Module (STIM). The captured signals were analyzed and related text and voice would be generated. The other module is processing human voice real-time using Sphinix-4 framework and generate corresponding text and displaying Sinhala sign language animations on an external display using an animated avatar. Generating animations was done by using Blender and JMonkey game engine.
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    A transformer design optimisation tool for oil immersed distribution transformers
    (2015-08-03) Amarasinghe, RPWS; Kumara, WGKP; Rajapaksha, RAKG; Rupasinghe, RADK; Wijayapala, WDAS
    This paper presents a methodology to design hermetically sealed shell type oil immersed distribution transformers with minimum evaluated cost according to the IEC standards. Distribution transformer model and design constraints are implemented as a user friendly software using MATLAB. An objective function for total evaluated cost is optimized subjected to ten constraints according to IEC 60076 in addition to geometrical constraints. A design example on a 630kVA transformer is presented for illustration.
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    item: Conference-Abstract
    A Transformer design optimisation tool for oil immersed distribution transformers
    Amarasinghe, RPWS; Kumara, WGKP; Rajapaksha, RAKG; Rupasinghe, RADK; Wijayapala, WDAS
    This paper presents a methodology to design hermetically sealed shell type oil immersed distribution transformers with minimum evaluated cost according to the IEC standards. Distribution transformer model and design constraints are implemented as a user friendly software using MATLAB. An objective function for total evaluated cost is optimized subjected to ten constraints according to IEC 60076 in addition to geometrical constraints. A design example on a 630kVA transformer is presented for illustration.