A suite of thermodynamic models of the gas turbines on the DDH 280 class destroyers has been developed for onboard diagnostic purposes. The models are based on a fundamental description of the engine components and allow the Engineering Officer to simulate a variety of faults as a means of duplicating observed measurements.

Evaluation of the concept required a ruggedized computer capable of withstanding twelve months in the machinery room of a ship. This development presented problems of its own which will be discussed in the context of the current evaluation program.

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