Tyrone Fernando

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The paper presents a method to design a spatial control system based on sliding mode observer. The non-linear model of pressurized heavy water reactor (PHWR) including xenon and iodine dynamics is characterized by 70 state variables and 14 inputs and outputs each. Linear nodal model is obtained by linearizing the non-linear dynamic equations of the reactor(More)
This note deals with the design of reduced-order observers for a class of nonlinear systems. The order reduction of the observer is achieved by only estimating a required partial set of the state vector. Necessary and sufficient conditions are derived for the existence of reduced-order observers. An observer design procedure based on linear matrix(More)
The theory of H infinity optimal control has the feature of minimizing the worst-case gain of an unknown disturbance input. When appropriately modified, the theory can be used to design a "switching" controller that can be applied to insulin injection for blood glucose (BG) regulation. The "switching" controller is defined by a collection of basic insulin(More)
The theory of optimal control has the feature of minimizing the worst-case gain of an unknown disturbance input. When appropriately modified, the theory can be used to design a “switching” controller that can be applied to insulin injection for blood glucose (BG) regulation. The “switching” controller is defined by a collection of basic insulin rates and a(More)