Romesh Nagarajah

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The motivation for this research stems from a need for providing a non-destructive testing method capable of detecting and locating any defects and microstructural variations within armour ceramic components before issuing them to the soldiers who rely on them for their survival. The development of an automated ultrasonic inspection based classification(More)
Non-destructive testing using ultrasonic measurement is used to ensure the quality of the die-casting products. The quality of a casting depends on the presence of discontinuities such as porosity and on the final metallurgical structure. Discontinuities occurring in the sub-surface of the cast structure mostly have irregular surfaces which scatter the(More)
In this research, various extracted features were used in the development of an automated ultrasonic sensor based inspection system that enables defect classification in each ceramic component prior to despatch to the field. Classification is an important task and large number of irrelevant, redundant features commonly introduced to a dataset reduces the(More)
Ceramic tiles, used in body armour systems, are currently inspected visually offline using an X-ray technique that is both time consuming and very expensive. The aim of this research is to develop a methodology to detect, locate and classify various manufacturing defects in Reaction Sintered Silicon Carbide (RSSC) ceramic tiles, using an ultrasonic sensing(More)
Cold spray is a unique coating technology that allows for solid state deposition of particles under atmospheric pressure. In this paper, a three dimensional, Computational Fluid Dynamics (CFD) multicomponent model is developed to estimate cold spray gas conditions involving both nitrogen and air. Calibration of the model followed by validation is(More)
A novel approach using multiple-adaptive fuzzy systems in a fuzzy PDC (Parallel Distributed Compensation) based structure for integrated lateral and longitudinal control of highway vehicles for improved transient response, is presented in this paper. For comparison studies a single-adaptive fuzzy controller synthesis is also presented. These fuzzy setups(More)
A novel control approach using multiple-adaptive fuzzy systems with switching for solving integrated lateral and longitudinal control of highway vehicle systems for improved transient response, is presented in this paper. The most suitable adaptive controller of the multiple-adaptive fuzzy system is switched depending on the suitable operating conditions.(More)
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